主催: 一般社団法人 日本エネルギー学会 石炭科学部会, 一般社団法人 日本エネルギー学会 コークス工学研究部会
共催: 日本学術振興会 石炭・炭素資源利用技術第148委員会, 日本エネルギー学会 重質油部会
後援: 新潟大学
会議名: 第48回石炭科学会議
回次: 48
開催地: 朱鷺メッセ 新潟コンベンションセンター
開催日: 2011/10/24 - 2011/10/25
Steam gasification of a low rank coal with Ca catalysts prepared from CaCO_3 in water has been studied with a fixed-bed, quartz reactor. When the coal with about 0.6 wt % Ca is first pyrolyzed and then gasfied for 1 h in 50 vol. % H_2O/He, char conversions at 750 and 800 ℃ reach approximately 70 and 90 wt % (dacf), which are 2 and 1.5 times those without the Ca, respectively. The catalyst shows the high activity comparable to that of the Ca ion-exchanged using an aqueous solution of Ca(OH)_2. The TPD and XRD measurements reveal that CaCO_3 added is initially present in the ion-exchanged forms and then finely-dispersed in the pyrolyzed char. These results demonstrate that CaCO_3 is effective as catalyst raw material in steam gasification of low rank coal.
