金属蜂窝负载Pd催化甲烷部分氧化制合成气  

Syngas Preparation by Partial Oxidation of Catalyzed Methane Supported by Pd Metal Honeycomb

作　　者：张杰[1] 张青蔚[1] 贾莉伟[1] 王军[1] 翁端[2] 沈美庆[1] 

机构地区：[1]天津大学,天津300072 [2]清华大学,北京100084

出　　处：《稀有金属材料与工程》2006年第7期1158-1161,共4页Rare Metal Materials and Engineering

基　　金："973"国家重点基础研究基金(2004CB719503);中国石油天然气股份有限公司科学研究与技术开发项目基金(W050509-01-05)资助项目

摘　　要：采用浸渍法制备负载金属Pd(其中金属Pd含量0.6g/L)活性组分的金属蜂窝载体催化剂,应用于甲烷部分氧化制合成气。实验表明,焙烧温度为950℃的催化剂较600℃的催化剂甲烷转化率、CO和H2的选择性更高,焙烧温度为950℃的催化剂在反应温度800℃,GHSV=1×105ml/g·h条件下,甲烷转化率为91%,CO和H2的选择性分别达到90%和89%。用SEM与XPS对催化剂进行表征,结果表明,950℃焙烧催化剂并没有出现明显的烧结现象,且可能由于更多零价Pd的出现,使得该催化剂的性能更好。由于金属蜂窝载体优良的导热性,对950℃焙烧温度制备的金属蜂窝催化剂,催化剂床层的飞温点温度小于880℃,可以解决其它类型催化剂在甲烷部分氧化反应中出现的飞温问题,具有一定的工业化意义。Metal honeycomb supported by rare metal Pd catalyst （0.6 g/L Pd） was used to prepare the syngas by partial oxidation of catalyzed methane in this study. The experiment results indicate that the catalyst calcined at 950℃ has higher catalytic activity than at 600℃, with a methane conversion of 91% and selectivity values of 90% and 89%, respectively, for CO and H2 under the conditions of reaction at 800℃, GHSV of 1 × 10^5 ml/g.h, and CH4：air ratio of 2：5. A series of characterizations about the catalyst were also made by SEM and XPS. Conclusions can be drown that calcining at 950℃ can not make the metal honeycomb catalysts sintering distinctly, but get a better catalytic activity due to the more Pd^0 production. The peak temperature on the catalyst calcined at 950℃ is below 880℃ due to the good heat conduction of this metal substrate. It can resolve the problems of peak temperature for other types of catalysts in the reaction of POM and is more helpful for the industrialization of partial oxidation methane process.

关 键 词：PD 甲烷部分氧化 金属蜂窝载体 飞温 

分 类 号：TE665.3[石油与天然气工程—油气加工工程]