对失活Co-Mo-KAl_2O_3硫化物催化剂的剖析研究  

Analysis of the Deactivated Co-Mo-K/Al_2O_3 Sulfide Catalyst for WGSR

作　　者：李玉敏[1] 王立刚[1] 王日杰[1] 张继炎[1] 张鎏[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《化学工业与工程》2001年第5期255-259,299,共6页Chemical Industry and Engineering

摘　　要：本文通过多种测试技术研究了工业Co -Mo -K Al2 O3 耐硫变换催化剂 ,失活样中各元素的存在状态、含量和物相变化。发现 ,在原催化剂中钾、硫从内部向表面迁移并有流失 ,γ -Al2 O3 转变为 (Al2 O3 ) 10R ,MoS2 、Co9S8变为含活性硫物种少的物相 ;从反应气中夹带的铁、铬、硅和镍杂质沉积在表面上。由此导致催化剂对H2 O和CO的吸附与反应能力的下降 ,最终造成严重失活。Taking advantages of various characterizing techniques and comparative data between the activated and deactivated Co-Mo-K/Al 2O 3 sulfide catalysts for WGSR obtained some results. It was found that in the deactivated sample some K and S ingrated from interier to exterior and carried away by the gas stream, Al 2O 3 was changed from γ-Al 2O 3 to (Al 2O 3). 10R some more stable form of Co and Mo components were formed by the action of higher steam partial pressure resulting in the loss of reactivity seriously. Besides, Fe, Ni, and Co trapped by the feed gas from the pipe lines and vessels deposited on the surface the covering of the active sites, thus made the situation worse.

关 键 词：水煤气 变换反应 Co-Mo-K/Al2O3 催化剂 程序升温测硫 硫化物 耐硫变换 

分 类 号：TQ426.8[化学工程] O643.361[理学—物理化学]