Cu/Cr催化剂上的甲醇部分氧化制氢  

Selective Production of Hydrogen by Partial Oxidation of Methanol over Cu/Cr Catalysts

作　　者：王志飞[1] 席靖宇[1] 王卫平[1] 吕功煊[1] 

机构地区：[1]中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州730000

出　　处：《分子催化》2001年第5期364-368,共5页Journal of Molecular Catalysis(China)

基　　金：国家重点基础研究发展规划项目资助 ( G2 0 0 0 0 2 6 4)

摘　　要：采用共沉淀法 ,制得不同配比的 Cu/ Cr催化剂 ;考察了 O2 / CH3OH比对甲醇部分氧化制氢 (CH3OH+1/ 2 O2 → 2 H2 +CO2 )反应活性的影响 ;利用 TPR、XRD、BET、N2 O测定 Cu表面积等手段对 Cu/ Cr催化剂进行了表征 .活性评价结果表明 ,在低的 O2 / CH3OH比时 ,Cu6 0 Cr40催化剂的活性较差 ,但 O2 / CH3OH比接近 0 .5时 ,活性较好 ,且氢的选择性也较高 .结合表征结果推测 ,催化剂中的 Cu+ / Cu0Hydrogen production by partial oxidation of methanol (CH\-3OH+1/2 O\-2→2 H\-2+CO\-2) was studied over a series of Cu/Cr catalysts prepared by a coprecipitation method. Catalyst performances have been investigated under various O\-2/CH\-3OH ratios at 473 K. Experimental results show that Cu60Cr40 exhibits a high CH\-3OH conversion and a high H\-2 selectivity under the feed ratio O\-2/CH\-3OH (molar) of 0.5 as compared with the other catalysts. This catalyst is superior to the conventional Cu/Zn catalysts. However, this catalyst exhibits low activity for partial oxidation of methanol, when O\-2/CH\-3OH ratio is lower than \{0.3\}. Cu/Cr catalysts were characterized by XRD, H\-2\|TPR, BET method and determination of the copper surface area by N\-2O decomposition. Results of characterization revealed that catalyst performance for methanol conversion is dependent on the Cu\++/Cu\+0 ratio in the catalyst.

关 键 词：甲醇 Cu/Cr催化剂 部分氧化 氢气 制备 催化活性 铜/铬催化剂 

分 类 号：TQ116.2[化学工程—无机化工] O643.361[理学—物理化学]