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Gdańsk University of Technology

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Publications from the year 2024

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  • Błędy projektowe i wykonawcze płyty fundamentowej garażu podziemnego
    • Maciej Niedostatkiewicz
    • Tomasz Majewski
    2024 Przegląd Budowlany

    W artykule przedstawiono opis uszkodzeń płyty fun- damentowej garażu podziemnego, która została błędnie zaprojek- towana, a następnie wykonana w sposób niezgodny z zasadami wiedzy technicznej. Bezpośrednio po zakończeniu realizacji płyty fun- damentowej na jej powierzchni wystąpiły intensywne zarysowania, które miały charakter nieustabilizowany i ulegały dalszemu rozwo- jowi w czasie. Wykonana na płycie fundamentowej w ramach prac wykończeniowych posadzka również uległa zarysowaniu. W pracy przedstawiono propozycje zakresu prac naprawczych zarówno sa- mej płyty fundamentowej, jak i uszkodzonej posadzki, tj. górnej po- wierzchni wykończonej zasypką utwardzoną powierzchniowo

  • Błędy projektowe i wykonawcze płyty fundamentowej garażu podziemnego
    • Maciej Niedostatkiewicz
    • Tomasz Majewski
    2024

    W artykule przedstawiono opis uszkodzeń płyty fundamentowej garażu podziemnego, która została błędnie zaprojektowana, a następnie wykonana w sposób niezgodny z zasadami wiedzy technicznej. Bezpośrednio po zakończeniu realizacji płyty fundamentowej na jej powierzchni wystąpiły intensywne zarysowania, które miały charakter nieustabilizowany i ulegały rozwojowi w czasie. Wykonana w ramach prac wykończeniowych posadzka również uległa zarysowaniu. W pracy przedstawiono propozycje zakresu prac naprawczych zarówno samej płyty fundamentowej, jak i uszkodzonej posadzki tj. górnej powierzchni wykończonej zasypką utwardzoną powierzchniowo.

  • Błędy projektowe i wykonawcze w kogeneracyjnych zespołach wytwórczych
    • Dariusz Karkosiński
    2024 Automatyka Elektryka Zakłócenia

    Omówiono wpływ błędów projektowych i wykonawczych kogeneracyjnych zespołów wytwórczych, w szczególności połączenia punktów neutralnych gwiazdy uzwojeń generatora i transformatora, na powstawanie zakłóceń w ich pracy oraz awarii. Przenalizowano specyficzny rozwój zwarcia łukowego na przyłączach wyłącznika blokowego do szyn i uszkodzenie wyłącznika. Omówiono przykład powstania i rozwoju awarii szynoprzewodu będącej wynikiem błędów konstrukcyjnych oraz wykonawczych przy budowie zespołu wytwórczego.

  • Bodybuilders and high-level meat consumers’ behavior towards rabbit, beef, chicken, turkey, and lamb meat: A comparative review
    • Shahida Anusha Siddiqui
    • Shuva Bhowmik
    • Maliha Afreen
    • İlknur Ucak
    • Ali Ikram
    • Francesca Gerini
    • Mohammad Mehdizadeh
    • Raphael D. Ayivi
    • Roberto Castro Munoz
    2024 NUTRITION

    In bodybuilders’ diets, protein plays a crucial role in supporting muscle growth and repairing damaged muscle tissue. These individuals meet their protein needs by combining dietary sources with supplements. Animal-based proteins are often preferred over plant-based proteins because they are believed to better support muscle protein synthesis. This review explores the meat consumption patterns of bodybuilders and high-level meat consumers, focusing on rabbit, beef, chicken, turkey, and lamb. We describe and compare the types of meat bodybuilders commonly consume and provide an overview of protein supplements, including meat-based options, plant-based alternatives, and whey-based products. Our aim is to gain insight into the dietary preferences of bodybuilders and high-level meat consumers, considering their nutritional requirements and the potential effect on the meat industry. We conducted an extensive search across various databases, including Scopus, Web of Science, PubMed, and Google Scholar. We found that individual choices vary based on factors such as attitudes, trust, taste, texture, nutritional content, ethical considerations, and cultural influences. Nutritional factors, including protein content, amino acid profiles, and fat levels, significantly influence the preferences of bodybuilders and high-level meat consumers. However, it is crucial to maintain a balance by incorporating other essential nutrients such as carbohydrates, healthy fats, vitamins, and minerals to ensure a complete and balanced diet. The findings from this review can inform strategies and product development initiatives tailored to the needs of bodybuilders and discerning meat enthusiasts.

  • Bone healing under different lay‐up configuration of carbon fiber‐reinforced PEEK composite plates
    • Agnieszka Sabik
    2024 JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS

    Secondary healing of fractured bones requires an application of an appropriate fixa-tor. In general, steel or titanium devices are used mostly. However, in recent years,composite structures arise as an attractive alternative due to high strength to weightratio and other advantages like, for example, radiolucency. According to Food andDrug Administration (FDA), the only unidirectionally reinforced composite allowed tobe implanted in human bodies is carbon fiber (CF)-reinforced poly-ether-ether-ketone (PEEK). In this work, the healing process of long bone assembled withCF/PEEK plates with cross- and angle-ply lay-up configurations is studied in theframework of finite element method. The healing is simulated by making use of themechanoregulation model basing on the Prendergast theory. Cells transformation isdetermined by the octahedral shear strain and interstitial fluid velocity. The processruns iteratively assuming single load cycle each day. The fracture is subjected to axialand transverse forces. In the computations, the Abaqus program is used. It is shownthat the angle-ply lamination scheme of CF/PEEK composite seems to provide betterconditions for the transformation of the soft callus into the bone tissue.

  • Bounding conditional entropy of bipartite states with Bell operators
    • Jan Horodecki
    • Piotr Mironowicz
    2024 PHYSICAL REVIEW A

    Quantum information theory explores numerous properties that surpass classical paradigms, offering novel applications and benefits. Among these properties, negative conditional von Neumann entropy (CVNE) is particularly significant in entangled quantum systems, serving as an indicator of potential advantages in various information-theoretic tasks, despite its indirect observability. In this paper, we investigate the relationship between CVNE and the violation of Bell inequalities. Our goal is to establish upper bounds on CVNE through semidefinite programming applied to entangled qubits and qutrits, utilizing selected Bell operators. Our findings reveal that a semi-device-independent certification of negative CVNE is achievable and could be practically beneficial. We further explore two types of robustness: robustness against detection efficiency loopholes, measured by relative violation, and robustness against white noise and imperfections in state preparation, measured by critical visibility. Additionally, we analyze parametrized families of Bell inequalities to identify optimal parameters for different robustness criteria. This study demonstrates that different Bell inequalities exhibit varying degrees of robustness depending on the desired properties, such as the type of noise resistance or the target level of negative CVNE. By bridging the gap between Bell inequalities and CVNE, our research enhances understanding of the quantum properties of entangled systems and offers insights for practical quantum information processing tasks.

  • Brewery spent grain valorization through fermentation: Targeting biohydrogen, carboxylic acids and methane production
    • Jacobo Pérez-Barragán
    • Cristina Martínez-Fraile
    • Raúl Muñoz
    • Guillermo Quijano
    • Rafael Maya-Yescas
    • Elizabeth León-Becerril
    • Roberto Castro Munoz
    • Octavio García-Depraect
    2024 PROCESS SAFETY AND ENVIRONMENTAL PROTECTION

    This study investigated three different fermentation approaches to explore the potential for producing biohydrogen, carboxylic acids, and methane from hydrolysates of thermally dilute acid pretreated brewer's spent grains (BSG). Initially, the research focused on maximizing the volumetric hydrogen production rate (HPR) in the continuous dark fermentation (DF) of BSG hydrolysates by varying the hydraulic retention time (HRT). The highest HPR reported to date of 5.9 NL/L-d was achieved at 6 h HRT, with a Clostridium-dominated microbial community. The effect of the operational pH (4, 5, 6, and 7) on the continuous acidogenic fermentation was then investigated. A peak carboxylic acid concentration of 17.3 g CODequiv./L was recorded at pH 6, with an associated volumetric productivity of 900.5 ± 13.1 mg CODequiv./L-h and a degree of acidification of 68.3 %. Lactic acid bacteria such as Limosilactobacillus and Lactobacillus were dominant at pH 4–5, while Weissella, Enterococcus, and Lachnoclostridium appeared at pH 6 and 7. Finally, this study evaluated the biochemical methane potential of the DF broth and the unfermented hydrolysates and found high methane yields of 659 and 517 NmL CH4/g-VSadded, respectively, both within one week. Overall, the results showed that pretreated BSG can be a low-cost feedstock for the production of bioenergy and valuable bio-based chemicals in a circular economy.

  • Bridging the Gap Between Legitimacy and Neutralisation Strategies in Sustainability Reporting
    • Eljas Johansson
    2024

    Amid global sustainability challenges, such as climate change, companies operating in different industries face increasing demands for accountability and transparency. To meet these demands, sustainability reporting (SR) has become a mainstream business practice in communicating companies’ positive and negative sustainability impacts. This short paper aims to increase our understanding of how companies may release negative information while seeking to maintain their legitimacy. For this purpose, the paper bridges the gap between legitimacy strategies, impression management and neutralisation techniques by reviewing their associated literature. The nature of neutralisation techniques and how organisations use them in the SR context is underexplored by scholars. Finally, the paper presents prospective discussions of an ongoing study that examines negative sustainability disclosure in the tourism transportation context, namely the airlines.

  • Building new competencies of architects and civil engineers through an educational offer in timber construction: a case study of Polish and Lithuanian students
    • Justyna Borucka
    • Tomasz Zybała
    • Rosita Norvaisiene
    2024 Full text Global Journal of Engineering Education

    The article outlines an innovative approach by schools of architecture and civil engineering to educate professionals skilled in hybrid timber building construction and design, thereby filling the educational gap in the area of timber construction. To answer the question of what student competencies should be developed in the design and construction of sustainable, high-performance hybrid wood structures, a survey was conducted among several wood product design and manufacturing companies in Europe. Then, in an attempt to prepare an innovative educational course programme on sustainable design of hybrid timber buildings, the current educational offerings of selected architecture and civil engineering faculties of European universities were examined. The article presents the survey results from Poland and Lithuania. The results of the survey show a lack of comprehensive education subjects to shape the competencies of architecture and civil engineering students. The offered subjects need to be improved in relation to modern hybrid timber structures to provide the graduates with the required competencies. This research was carried out as part of the EU project Sustainable, High-Performance Hybrid Timber Building (HiHTC).

  • Business Process Management education in Poland: A manifesto for academic teaching
    • Piotr Sliż
    • Justyna Berniak-Woźny
    • Edyta Brzychczy
    • Renata Gabryelczyk
    • Katarzyna Gdowska
    • Marzena Grzesiak
    • Aneta Napieraj
    • Marta Podobińska-Staniec
    • Natalia R. Potoczek
    • Marek Szelągowski
    • Piotr Senkus
    • Krzysztof Kluza
    2024 Full text e-mentor

    This paper critically assesses Business Process Management (BPM) education in Poland and provides evidence-based recommendations for improvement. Through a survey of 44 BPM educators, the study evaluates BPM lifecycle coverage, IT tool utilization, and incorporation of the Six Core Elements of BPM. The findings reveal a focus on process modeling and analysis, identifying gaps in the way the entire BPM lifecycle is addressed. Despite the utilization of various IT tools, there is a notable absence of coverage for emerging topics such as process mining, AI, and Robotic Process Automation. Only 12% of courses cover all Six Core Elements of BPM, and there is a critical gap in student education, which is the underrepresentation of the People and Culture elements. The paper concludes with a manifesto for greater alignment between academic education and industry needs through comprehensive BPM curricula, dedicated software tools, and more robust coverage of the strategic and governance aspects of BPM. This will bridge the gap between academic education and real-world BPM applications, so that graduates can be better prepared for the challenges of the modern business landscape, which can enhance the quality and effectiveness of BPM education, thereby aligning it with the evolving demands of the business environment and contributing to the growth and competitiveness of organizations in Poland.

  • Calculation of electron scattering lengths on Ar, Kr, Xe, Rn and Og atoms
    • Paweł Syty
    • Michał Piłat
    • Józef Sienkiewicz
    2024 JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS

    Focusing on the noble gases, we calculate the scattering potential using the Dirac-Coulomb Hamiltonian supplemented with a model polarization potential. We determine the scattering lengths using two methods, namely phase shifts for very small scattering energies and the shape of the wave function for zero scattering energy. We compare our theoretical electron scattering length results on Ar, Kr and Xe atoms with existing experimental and theoretical data. In turn, the results obtained for the first time for Rn and Og atoms require independent confirmation. The analysis conducted indicates that the source of the greatest uncertainty in the obtained results is the literature values of dipole polarizability. The study used the GRASP2018 computational package for bound states and the modified COWF code for continuum states.

  • Calculation of Maximum Permissible Load of Underground Power Cables–Numerical Approach for Systems with Stabilized Backfill
    • Seweryn Szultka
    • Stanisław Czapp
    • Adam Tomaszewski
    • Hanan Tariq
    2024 Full text Applied Sciences-Basel

    The maximum permissible load of underground power cables (known in U.S. engineering as “ampacity”) is a function of many parameters, in particular, the thermal resistivity of the native soil. If this resistivity is relatively high, thermal/stabilized backfill is applied, i.e., another material is placed around the cables, providing favourable conditions for heat transfer to the environment. It has a positive impact on the reliability of the power supply and favours the operational durability of the cables. In design practice, however, there is a difficult task – correct determination of the ampacity of the cable line depending on the thermal parameters and the geometry of the backfill. Therefore, this article presents the results of a numerical analysis to determine the ampacity of cable lines in which stabilized backfill is used. A new mathematical relationship is proposed that allows the correction of the ampacity of cable lines depending on their cross-section as well as the thermal and geometric parameters of the cable surroundings.

  • Can we really solve an arch stability problem?
    • Jacek Chróścielewski
    • Victor Eremeev
    2024 Full text INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE

    We bring attention to the problem of solving nonlinear boundary-value problems for elastic structures such as arches and shells. Here we discuss a classical problem of a shear-deformable arch postbuckling. Considering a postbuckling behaviour of a circular arch we discuss the possibility to find numerically a solution for highly nonlinear regimes. The main attention is paid to the problem of determination of all solutions. The main conclusion that there is no guarantee to find all solutions, in general.

  • Capital Structure and Firm Performance Global Financing Decisions among Listed Companies
    • Ewelina Sokołowska
    • Milad Zargartalebi
    2024

    In the complex world of finance, understanding the relationship between a company's capital structure and its overall performance is crucial. This book offers a comprehensive exploration of the interdependence between capital structure decisions and business performance, with a specific focus on German-listed companies. It provides valuable insights into the intricate dynamics of corporate finance. Through a blend of theoretical frameworks, empirical research, and practical applications, the book presents readers with a thorough understanding of how capital structure decisions impact a company's profitability, risk profile, and long-term sustainability. From traditional theories of capital structure to cutting-edge empirical methodologies, the book outlines the latest developments in the field, offering practical tools and strategies for optimising financial decision-making. Moreover, the book explores how different regions and global trends influence capital structure decisions, providing a comprehensive examination of varying practices and the factors that shape them. It delves into specific aspects influencing global capital structures, including an analytical comparison of capital structures across key global markets such as the United States, the European Union, and China. This comparison highlights how economic, cultural, and market dynamics influence corporate leverage decisions. The impact of technological innovations and their role in reshaping financial strategies are also discussed. Designed for scholars, researchers, and advanced students in finance and economics, this book serves as a definitive reference for understanding the complex dynamics of corporate finance. With its rigorous analysis and practical insights, it equips readers with the knowledge and analytical tools needed to navigate the challenges of capital structure decision-making in today's dynamic business environment.

  • Carbon dioxide sequestration by industrial wastes through mineral carbonation: Current status and perspectives
    • Xiaodan Lin
    • Yingshuang Zhang
    • Hongwen Liu
    • Grzegorz Boczkaj
    • Yijun Cao
    • Chongqing Wang
    2024 JOURNAL OF CLEANER PRODUCTION

    Mineral carbonation using natural minerals or industrial wastes is a safe and promising strategy for CO2 sequestration. Application of industrial wastes for this purpose has significant ecological and environmental value, which is one of the key green technologies in the global carbon mitigation. This review summarizes the current research status of CO2 mineralization by industrial wastes. This work surveys the mechanisms and capacities of CO2 mineralization using different industrial wastes (mainly steel slags, blast furnace slags, coal fly ash, waste gypsum, and red mud), evaluates the influence of carbonation pathways and process parameters on the CO2 sequestration capacity, and analyzes the current industrial application status of CO2 sequestration using industrial wastes. Direct aqueous carbonation and indirect carbonation are the two most studied and promising mineralization routes. The leaching-mineralization cycle process has great potential for industrial application, especially for the treatment of coal fly ash, steel slag and other wastes containing calcium oxide, owing to the stable cycle performance of the absorbers. Researchers pay more attention to CO2 mineralization by steel slag compared to other wastes, and the capacity of CO2 mineralization varies greatly for different wastes. Several reports already reported carbonation effectiveness up to 100%. A CO2 sequestration capacity reached 536 g/kg for steel slag and 361 g/kg of blast furnace slag, revealing superior properties of these materials. CO2 sequestration using industrial wastes benefits CO2 emission reduction and comprehensive utilization of industrial wastes. To overcome the problem of the high energy consumption for regeneration of absorbent, a novel integrated CO2 absorption-mineralization process is currently widely studied. A possibility of co-production of value-added products - like different types of zeolite or lithium orthosilicate based adsorbents was highlighted, improving the economic balance of the overall process. More studies on pilot scale should be performed, to fully confirm the feasibility of developed technologies. Application of these developments is still faced with significant issues, including low carbonation efficiency, poor product quality, high process cost, and insufficient mass and heat transfer.

  • Carbon Nanomaterials in Seed Priming: Current Possibilities
    • José Daniel da Silva Fonseca
    • Ewa Wojciechowska
    • Joanna Kulesza
    • Bráulio Silva Barros
    2024 ACS Omega

    The prevailing agricultural system has become deeply ingrained and insufficient due to outdated practices inherited from the Green Revolution, necessitating innovative approaches for sustainable agricultural development. Nanomaterials possess the potential to significantly improve the efficient utilization of resources while simultaneously encouraging sustainability. Among these, carbonaceous nanomaterials have found diverse applications in agriculture, exhibiting remarkable capabilities in this domain. Notably, using biowaste to produce these materials makes them both cost-effective and environmentally friendly for seed priming. Seed priming is a technique that can potentially enhance germination rates and stress tolerance by effectively regulating gene pathways and metabolism. This review provides a comprehensive summary of recent progress in the field, highlighting the challenges and opportunities of applying carbonaceous materials in seed priming to advance sustainable agriculture practices. The existing reviews provide a general overview of using carbonaceous materials (graphene and derivatives) in agriculture. Yet, they often lack a comprehensive examination of their specific application in seed-related contexts. In this review, we aim to offer a detailed analysis of the application of carbonaceous materials in seed priming and elucidate their influence on germination. Furthermore, the review shows that crop response to carbonaceous nanomaterials is linked to material concentration and crop species.

  • Carburization Behavior of High-Grade Pellets After Direct Reduction in Pure Hydrogen
    • Angelo Perrone
    • Pasquale Cavaliere
    • Behzad Sadeghi
    • Leandro Dijon
    • Aleksandra Mirowska
    • Damian Koszelow
    2024 Journal of Sustainable Metallurgy

    Carburization is a critical aspect in the iron and steel industry as it significantly affects the mechanical and chemical properties of the final product. This study provides a comprehensive analysis of the carburization potential of high-grade quality iron ore pellets after direct reduction in pure hydrogen. The results show that the porosity of the pellets has a significant impact on the efficiency and success of the direct reduction process with hydrogen. The reduction process can be completed at a lower temperature in pure hydrogen compared to carbon monoxide, with the iron carbide concentration peaking at temperatures up to 500 °C before decreasing with further temperature increases. The uniform distribution of SiO2, Al2O3, and CaO is critical to the carburizing process and affects the final properties of the steel. An increased degree of metallization and porosity are associated with an improved carburizing tendency. This study highlights the intricate interplay between temperature, carbon sources, and the resulting equilibrium concentration of iron carbides and provides insights into the complex dynamics of this phenomenon.

  • Cascaded Buck Hybrid Interlink Converter for Multiple-Input / Multiple-Output Operation
    • Ahmed Awadelseed
    • Arkadiusz Lewicki
    • Charles Odeh
    • Atif Iqbal
    2024 Full text

    The provision of isolated- and non-isolated DC output voltages by Power electronics power-conditioning devices in the recent ‘green-energy-revolution’ era is on course. In this paper, a structure for multi-input multi-output(MIMO) DC–DC buck converter is proposed to generate output voltages of varying levels with fewer component-count. The DC output voltage of each of the constituting buck converters can be used independently or cascaded with one another, depending on the output load voltage requirement. The converter operational modes are analysed and its gain models are derived. Also, expressions for the efficiency and power density of the proposed buck converter are presented. Distinct features of proposed converter are: its simplified configuration, high input/output power density, low-cost involvement, reduction of ripple amplitudes of the source currents, and possibility of deploying energy sources with different voltage-current characteristics. High voltage gain, and bidirectional power flow can be achieved in the converter operations. Experimental results on a laboratory prototype of the proposed MIMO validated the presented DC-DC buck converter topological concept

  • Catalysts for advanced oxidation processes: Deep eutectic solvents-assisted synthesis – A review
    • Amir Mohammad Sheikh Asadi
    • Łukasz Cichocki
    • Ali Atamaleki
    • Marjan Hashemi
    • Holger Lutze
    • Muhammad Imran
    • Lingshuai Kong
    • Chongqing Wang
    • Grzegorz Boczkaj
    2024 Full text Water Resources and Industry

    New catalyst synthesis techniques, including green materials, are extensively studied for heterogeneous photocatalytic advanced oxidation processes (AOPs) on spotlight of sustainable development. Deep eutectic solvents (DESs) started to be used in this field as environmentally friendly alternative to ionic liquids (ILs). During the catalyst synthesis, DESs can act as stabilizers, capping agents, structure directing agents, templates, hydrolyzing agents, etching agents, intercalators, and latent supramolecular catalysts. Importantly, DESs have exhibited the ability to significantly influence catalyst morphology, functionalization and photocatalytic properties (confirmed both for classic UV lamps and light emitting diode (LED)), including band-gap modification. DESs positive effect was proved for a variety of materials, including metal oxides, metalorganic (MO) complexes and doped materials, MXene (MAX phase etching in DES environment), inorganic-organic hybrids, carbo-catalysts. Substantial enhancements were obtained for modification of photocatalytic materials like TiO2, ZnO, MnO2, iron oxides, ceria oxides, CdS, bismuth based photocatalysts and biochar modification. In this aspect, a particular role of DESs was confirmed for synthesis of nanomaterials in a form of nanoparticles, nanopowders or nanosheets. Effectiveness was further increased by oxidants such as hydrogen peroxide, persulfates and Fenton process. Effective application of DES-modified catalysts was confirmed for degradation of dyes (Rhodamine B, Reactive orange 16, Safranine, Orange II, methylene blue), pharmaceuticals and antibiotics (Cefixime, Tetracycline, Oxytetracycline, Flumequine, Sulfamethaxazole), PFASs (Perfluorooctanoic acid) and Cr(VI). This reveals high potential of DES based photocatalysts for environmental engineering and remediation. There are still remaining a significant gaps in our understanding of the roles and impacts of DESs in AOPs. Furthermore, there is an absence of data regarding the recovery of DESs in the catalyst synthesis processes applied in AOPs. Addressing this aspects is vital for economic and environmentally friendly applications. As research progresses, it is essential to unravel the intricacies of DES-mediated catalyst synthesis and their broader consequences.

  • Catalytic activity of Ni-MgAl2O4 modified with transition metal (Ti, Mo, W) carbides as potential catalysts for resource recovery via dry reforming of waste plastics
    • Ewelina Pawelczyk
    • Izabela Wysocka
    • Tomasz Dymerski
    • Jacek Gębicki
    2024 Full text CATALYSIS TODAY

    The growing amounts of plastic waste and CO2 emissions are two environmental threats that require urgent attention. Pyrolysis combined with dry reforming (PCDR) is a technology that allows both CO2 utilization and resource recovery from waste plastic. New catalysts for PCDR are crucial for developing efficient and stable processes that can be widely implemented in the industry. In this study, Ni/MgAl2O4 catalysts modified using different transition metal (Ti, Mo, W) carbides were investigated in the PCDR of low-density polyethylene (LDPE) and polystyrene (PS) with emphasis on syngas yield, H2/CO ratio, product distribution, and catalyst deactivation. In addition, the effect of reforming temperature and process pressure was investigated. The catalysts were characterized using H2-TPR, CO2-TPD, N2 physisorption, XRD, TEM, XPS and TGA. The combined characterization and activity tests demonstrated that modification with different metal carbides affects the structure and activity of Ni/MgAl2O4 catalysts in relation to product yields, syngas composition, and catalyst stability. The investigation revealed that modification of nickel catalysts with different transition metal carbides enables manipulation of syngas composition, which is of great importance because different industrial processes require synthesis gas with different H2:CO ratios. Moreover, mixed outcomes were observed when different plastic feedstocks were used in the PCDR, indicating that different metal carbide-modified catalysts may be suitable for the process depending on the feedstock used. Regarding the effectiveness of synthesis gas production and catalyst stability, the most promising catalyst was the Ni-TiC/MgAl2O4 catalyst. According to the obtained results, modification with TiC resulted not only in increased synthesis gas production but also in reduced carbon deposition in PCDR of both LDPE and PS.