溶融アルカリ炭酸塩を用いた炭素系物質のガス化・脱硫特性(熱工学,内燃機関,動力など)

概要

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This study focuses on gasification technology of carbonaceous materials in molten carbonates since this gasifier can gasify those fuels catalytically and in-situ clean up the gasified gas at high temperature simultaneously. This gasification system has such advantages that alkali metal compounds show catalytic function for the gasification reactions, the molten alkali compounds can absorb sulfur compounds and the molten media can capture ash and unreacted particles produced. The molten carbonate employed in this study is an eutectic salt with the compositions of 43mol% Na_2CO_3 and 57mol% K_2CO_3. CO_2 is selected as a gasification agent. Before the gasification experiments, the optimum gasification and desulfurization temperature is evaluated by the chemical equilibrium calculations. Fundamental gasification and desulfurization experiments were conducted, by using an electrically heated reactor. As a result, the main compositions of the gasified gas are CO, H_2 and CH_4. H_2S and COS gases in the product can be absorbed almost completely by the molten alkali carbonates. These results suggest that this gasifier can gasify the carbonaceous materials and desulfurize even at high temperature inside the furnace simultaneously.
社団法人日本機械学会の論文
2008-12-25