バイオマス改質と水素生成をともなう低温廃熱回収

采用流动式反应装置合成了具有露出{111}晶面的高铬取代CeO2纳米催化剂。流动式反应器实现了反应物溶液的快速加热和混合，使合成的高铬取代CeO2的摩尔分数高达38mol%。铬取代的CeO2纳米催化剂表现出极高的储氧能力。利用所制得的纳米CeO2催化剂，在30 0和35 0℃条件下进行了水热沥青裂解试验。沥青在没有结焦的情况下成功地转化为包括沥青质在内的较轻组分。令人惊讶的是，在转化过程中会产生氢气，并且氢气量随着铬替代量的增加而增加。这些结果清楚地表明，铬取代CeO2可以用于有机废物的制氢。

Highly Cr-substituted CeO2 nano-catalysts with exposing {111} facets were synthesized using a flow-type reactor. The flow-type reactor realized rapid heating and mixing of reactant solutions, which enabled the synthesis of highly Cr-substituted CeO2 up to 38 mol%. The Cr-substituted CeO2 nano-catalysts showed extremely high oxygen storage capacity. By using the produced CeO2 nano-catalysts, hydrothermal bitumen cracking was performed at 300 and 350 ℃. Bitumen was successfully converted to lighter components including asphaltene without coke formation. Surprisingly, hydrogen was evolved during conversion and the amount of hydrogen gas increased with the amount of Cr substitution. These results clearly suggest that Cr-substituted CeO2 can be used for hydrogen generation from organic waste.