甲醇水蒸气重整催化剂Cr_2O_3-ZnO的制备及其催化性能  

Preparation and Catalytic Performance of Cr_2O_3-ZnO Catalyst for Methanol Steam Reforming

作　　者：曹卫强[1] 陈光文[1] 初建胜[1] 李淑莲[1] 袁权[1] 

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023

出　　处：《催化学报》2006年第10期895-898,共4页

基　　金：国家自然科学基金(20122201;20490208);国际科技合作重点项目计划(2001CB711203)资助项目

摘　　要：采用共沉淀法制备了一系列Cr2O3-ZnO催化剂用于甲醇水蒸气重整制氢．用X射线衍射和N2吸附考察了Cr含量及焙烧温度对Cr2O3-ZnO催化剂物相结构的影响，并用不锈钢微通道反应器考察了催化剂的性能．结果表明，ZnO是催化剂的主要活性组分，Cr的加入使催化剂的比表面积有所降低，但明显提高了催化剂的活性和稳定性，并且CO选择性随Cr含量的增加而升高．当焙烧温度在500℃左右，CrO3含量在5．3％～17．6％范围内时催化剂性能较好．The Cr2O3-ZnO catalyst for methanol steam reforming was prepared by the co-precipitation method and characterized by means of X-ray diffraction and N2 adsorption. The catalytic performance for methanol steam reforming was evaluated using a stainless steel microchannel reactor. The addition of Cr to ZnO resulted in the formation of ZnCr2O4 spinel and promoted the activity and stability of the catalysts, although the BET surface area decreased. However, raising the Cr content also led to an increase in the CO selectivity. The Cr2O3-ZnO catalysts with the Cr content of 5.3 %-17.6 % calcined at above 500℃ exhibited better catalytic performance than that calcined at 400℃.

关 键 词：甲醇 水蒸气重整 氧化锌 氧化铬 氢气 微反应器 

分 类 号：O643.36[理学—物理化学]