甲烷部分氧化制合成气──铑基催化剂活性位的研究  

METHANE PARTIAL OXIDATION TO SYNGAS A Study of the Nature of Active Site over Rh Based Catalyst

作　　者：吴廷华[1,2] 汪海有[1,2] 翁维正[1,2] 陈明树[1,2] 万惠霖[1,2] 

机构地区：[1]厦门大学化学系固体表面物理化学国家重点实验室 [2]浙江师范大学化学系

出　　处：《催化学报》1998年第6期498-501,共4页

基　　金：国家教委归国人员启动基金

摘　　要：采用小体积（４０μｌ）脉冲反应技术研究了ＣＨ４和ＣＨ４／Ｏ２（２／１）在氧化态、还原态和不同还原程度的负载型铑基催化剂上的反应情况．当ＣＨ４与还原态催化剂反应时，ＣＯ为主要产物，其选择性＞７０％；当ＣＨ４与氧化态催化剂反应时，无目标产物ＣＯ生成．通过脉冲不同量的Ｈ２，对完全氧化态催化剂进行逐步还原，观察到氧化态催化剂只有被还原到一定的程度后，才表现出优良的制合成气催化性能．这一结果不仅进一步证实了还原态铑是反应的活性位，而且说明操作条件（如物料比，还原条件等）对反应性能的影响不应当被忽视．Reaction behavior of CH 4 and CH 4/O 2 (2/1) over reduced, partially reduced and oxidized SiO 2 supported Rh catalysts was investigated at temperature range of 973 K to 1073 K in a pulse microreactor. Small pulse volume (40 μl) was adopted. It was observed that over the reduced catalysts, CO is the primary product and its selectivity is >70%. Over the full oxidized catalysts, CO 2 is the major product. Very good performance was shown over partially reduced catalysts. From above results, it may be concluded that the partially reduced Rh is the active center for the reaction of CH 4 and O 2 as well as the experimental conditions (such as reactant composition, reduced degree of catalysts, etc ) have great effects on the catalytic performance.

关 键 词：甲烷 部分氧化 合成气 铑基 催化剂 活性位 

分 类 号：TQ116.25[化学工程—无机化工]