We report the development of technology that may contribute to a reduction\nin greenhouse gas emissions and improve the energy efficiency of the CO2\ncapture process. Lithium ortho-silicate is a suitable solid sorbent for capturing\nCO2. This reversible chemical reaction is also applicable to chemical heat storage.\nThe absorption reaction characteristics of lithium ortho-silicate were\nstudied by a thermogravimetric method and a volumetric method that demonstrated\nthe influence of heat and mass transfer limitations in a packed bed\ndesigned to be as small as possible. We developed a method for measuring the\nabsorption reaction characteristics in the experiments. In the experiments, a\nconstant conversion fraction of 60% was observed. The reaction system was\nstable to repetition. The CO2 absorption rate depends on the CO2 pressure\nand reactor temperature. The absorption rate was determined at several reactor\ntemperatures when the conversion fraction was 0.3. In this study, the\nmaximum absorption rate was obtained at 670Ã?Å¡C. It was demonstrated that\nlithium ortho-silicate is suitable for use in a chemical heat storage system.
Loading....