Rh/MgO/γ-Al_2O_3上的毫秒级甲烷蒸汽重整过程  

Milliseconds steam reforming of methane using Rh/MgO/γ-Al_2O_3 catalyst

作　　者：阳宜洋[1] 丁石[1] 金涌[1] 程易[1] 

机构地区：[1]清华大学化学工程系,北京市绿色反应工程与工艺重点实验室,北京100084

出　　处：《化工学报》2009年第8期1981-1987,共7页CIESC Journal

基　　金：中石油基础研究基金项目

摘　　要：采用负载型Rh/MgO/γ-Al2O3催化剂研究了毫秒级甲烷蒸汽重整过程,在水碳比为1和3的条件下,详细考察了反应温度、空速和催化剂Rh含量对反应转化率和选择性的影响。研究结果表明,Rh/MgO/γ-Al2O3催化剂在毫秒级操作条件下具有良好的催化性能,使用5%(质量分数)Rh催化剂,在水碳比3、反应温度1150K、空速641.11 L·(gcat)-1·h-1时,CH4转化率约90%,CO2选择性约20%,毫秒级接触时间反应行为即可接近热力学平衡。高温有利于毫秒级甲烷蒸汽重整过程。Steam reforming of methane （SRM） on Rh/MgO/γ-Al2O3 catalyst with contact time of milliseconds for producing hydrogen was studied. The effects of reactor temperature, space velocity and rhodium loading were investigated in detail at the H2O/CH4 molar ratio of 1 or 3. The results showed that Rh/MgO/γ-Al2O3 catalyst was extremely active and stable during the process of methane steam reforming. Under the conditions of rhodium loading of 5% （mass）, H2O/CH4 molar ratio of 3, reaction temperature at 1150 K and space velocity at 641.11 L · （g cat） ^-1 · h^-1, methane conversion could reach 90% and the selectivity to carbon dioxide was about 20%. The reaction performance approached nearly thermodynamic equilibrium within milliseconds contact time. A high reaction temperature benefited the progress of the reaction.

关 键 词：甲烷 蒸汽重整 制氢 铑催化剂 毫秒级过程 

分 类 号：TQ032[化学工程]