制备条件对介孔Ni-CaO-ZrO_2在甲烷三重整反应中催化性能的影响  

Influence of preparation conditions on the performance of Ni-CaO-ZrO_2 catalysts in the tri-reforming of methane

作　　者：司兰杰[1,2] 王长真[1,2] 孙楠楠[1] 闻霞[1] 赵宁[1] 肖福魁[1] 魏伟[1] 孙予罕[1,3] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001 [2]中国科学院研究生院,北京100049 [3]中国科学院上海高等研究院低碳转化中心,上海201203

出　　处：《燃料化学学报》2012年第2期210-215,共6页Journal of Fuel Chemistry and Technology

基　　金：中国科学院知识创新工程重要方向(KGCX2-YW-323)

摘　　要：在不同条件下采用并流共沉淀法制备了Ni-CaO-ZrO2催化剂,并将其用于CH4的三重整反应过程。以CH4的转化率和催化剂稳定性为指标,研究了催化剂制备过程中各工艺参数对其催化性能的影响。结果表明,催化剂的最佳制备条件为:焙烧温度973 K、前驱体沉淀pH=10～12、回流时间24 h。在该条件下得到的催化剂具有适宜的比表面积和Ni-ZrO2相互作用,在常压、973 K的反应条件下CH4的转化率能够达到70%,具有较高的催化活性和稳定性。Ni-CaO-ZrO2 catalysts were prepared by co-precipitation under different conditions and used in the tri-reforming of methane;the influence of preparation conditions on methane conversion and catalytic stability was evaluated.The results indicated that the optimal parameters used to prepare Ni-CaO-ZrO2 catalysts include a calcination temperature of 973 K,a pH value of 10~12 for co-precipitation,and a reflux duration of 24 h.The catalyst prepared under the optimal conditions has a proper surface area and Ni-ZrO2 interaction;it exhibits promising catalytic activity and stability in methane tri-reforming,and the methane conversion exceeds 70% under a temperature of 973 K and atmospheric pressure.

关 键 词：甲烷 三重整 NI基催化剂 制备条件 

分 类 号：O643[理学—物理化学]