Abstract

In order to contribute to utilization expansion of unused energy and renewable energy, a heat cycle of the small difference in temperature which used unique dissociation expansion property of CO2 hydrate is proposed. However, the formation speed of CO2 hydrate needs to be accelerated drastic to realize the proposed heat cycle. Therefore, application of a powdery iron oxide catalyst for gas hydrate formation, 150% or more of CO2 hydrate formation speed has realized. On the other hand, the powdery catalyst jumped out of the reactor with high pressure dissociated gas, stability of the catalytic effect was important subject. In this study, the carbon fiber supported catalyst is developed and performance stabilization of CO2 hydrate heat cycle is tried. The effect of the carbon fiber supported catalyst developed newly is comparable as conventional powdery catalyst, and the effect stable in repeating operation of heat cycle is obtained. Moreover, when pressure conditions of the gas hydrate heat cycle were set highly, the generated amount of CO2 hydrate increased from the proposal catalyst system.

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