Repozytorium publikacji - Politechnika Gdańska

Spherical vaterite particles were produced by carbonation of calcium chloride solution with addition of ammonia to facilitate CO2 absorption. Synthesis of calcium carbonate was carried out in a bubble column or gas-lift reactor. The course of the reaction was monitored by pH measurements. Precipitated solids were analyzed by Fourier-transformed infrared spectroscopy, x-ray powder diffraction and scanning electron microscopy, and the particle size distribution was determined by a laser diffraction method. Synthesized calcium carbonate products were mainly vaterite. The calcium chloride concentration and carbon dioxide volume fraction in a gas phase had the main impact on the size of the produced particles in both reactors. A slight decrease in the mean particle size was observed for the highest mixing intensity. Both tested reactors can be applied to produce vaterite particles, although formation of homogeneous nonagglomerated spherical particles in a gas-lift reactor required careful selection of the process parameters.

Autorzy

• dr hab. inż. Donata Konopacka-Łyskawa link otwiera się w nowej karcie ,
• prof. dr hab. inż. Barbara Kościelska link otwiera się w nowej karcie ,
• dr inż. Marcin Stanisław Łapiński link otwiera się w nowej karcie