Taiga TOYOTA

Development of the Efficient Biogas Storage Technology by Adsorption on Activated Carbon

Toshiya KOMATSU,�@Shoichi FUJITA ,�@Shuji HIMENO


Effectively using the sludge-digestion gas can be contributed to promotion of utilization of biomass. However, the delay of storage technology is the hindrance of effective use of biogas. The purpose in this study is development of the efficient biogas storage technology by adsorption on high performance activated carbon. First, the methane adsorption ability of various adsorbent was evaluated. Activated carbon with high bulk density was mostly suitable. Then, activated carbon that was most suitable for biogas storage was selected. In a second part, binary adsorption equilibria of methane and carbon dioxide were measured and analyzed with IAS (Ideal Adsorbed Solution) theory. Consequently, it was shown that the prediction of the storage capability of biogas is possible. It was found that the storage capability used this method was 12 to 20 times as much as conventional compressed storage at 0.2 to 0.5 MPa. Moreover, it was shown clearly that the main causes of affecting the adsorption performance of activated carbon are moisture. Additionally, it was found that the adsorption performance could be help about 90%, if moisture in biogas was removed, even if it would use same activated carbon for ten years.