Feasibility Study and Fabrication of a Natural Chabazite Molecular Sieve for Biogas Sweetening

摘要

The biogas technology will receive a great boost if a simple, efficient and cheap method of removing or reducing the percentage of CO sub 2 in biogas is found out. Present project aims at doing precisely the same by chemical adsorption using molecular sieves. Compared to other methods of gaseous separation, molecular sieve has an advantage of separating the gasses by molecular sizes and its therefore a more efficient method. Here we have used the naturally occuring chabazite as a molecular sieve. The dehydrated sample have free apertures of 3.1Ax4.4A dimensions; therefore it is a good candidate for trying in separating CO sub 3 from the biogas. Chabazite is abundantly available, is cheap and can be ground or cut to desired shape. Finally, based on the results of preliminary experiments a two cycle (two column) adsorption-desorption device for biogas sweetening will be designed and fabricated. The cost benefit analysis of the unit will be worked out. 14 refs., 3 figs., 5 tabs. (ERA citation 11:019403)