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Proceedings of Symposium on Energy Engineering in the 21st Century (SEE2000) Volume I-IV

ISBN Print: 1-56700-132-7

THE BASIC STUDY ON BIOGAS STORAGE BY USE OF METHANE CLATHRATE

Аннотация

Nowadays our lifestyle is characterized by consuming the large amount of energy. However, energy sources as fossil fuels are limited. Taking into consideration the present condition, it seems to be important to secure new energy sources. One of the promising renewable energy sources is biogas, which is compound gas consisting mainly of methane (CH4) and carbon dioxide (CO2). It is normally formed with the decomposition of organic substances. Because of its low energy density, the gas is generally stored in high-pressure gas bomb. To store it in a condition of high density, it is also attempted to store methane in the form of clathrate. The clathration of methane requires normally high pressure and low temperature. If the clathration of biogas and methane could be achieved under the normal pressure and temperature, this would make the gases a very useful energy source. In this study, the clathration of methane under the normal pressure and temperature was first attempted by using Tetrahydrofuran (THF) as additive. Further, to realize the higher storage density of methane, CO2 must be removed beforehand because not only methane but also CO2 form clathrate. To achieve CO2 removal, the possibility of absorption method using Monoethanolamine (MEA) is experimentally investigated, aiming efficient biogas utilization in final.
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