Volatile organochlorine compounds (VOXs) presented in biogas can cause many technological and environmental problems. During the combustion of biogas containing VOXs, the corrosion of installation, as well as the formation of toxic by-products (polyhalogenated dioxins and furans) and further emission to the atmosphere, may occur. Therefore, in this study, a new procedure based on physical absorption was developed. In order to meet the requirements of green chemistry and green engineering, new deep eutectic solvents (DESs) composed of natural components were used in the absorption studies. Several physical properties of new DESs were determined, followed by an explanation of the absorbents formation mechanism, by means of spectroscopic analysis, and density functional theory. The most important absorption parameters i.e. type of DES, gas flowrate, kind of matrix gas, temperature, and initial concentrations of VOXs were optimized. The obtained results indicate that DES composed of syringol and levulinic acid in 1:1 molar ratio could absorb VOXs efficiently. In addition, the DES regeneration studies demonstrated that the absorption capacities of DES did not change after ten absorption-desorption cycles. Studies on the absorption mechanisms indicate that the H-bonding and van der Waals interactions are the main driving force for the VOXs removal from biogas.
Authors
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1039/d1gc01735g
- Category
- Publikacja w czasopiśmie
- Type
- artykuły w czasopismach
- Language
- angielski
- Publication year
- 2021
