碱金属助剂对铜系低变催化剂低汽气比条件下稳定性和选择性的影响  

The Effect on the Stability and Selectivity of New Copper-Based LTS Catalysts under Low Steam/ Gas Condition

作　　者：杨桂玲[1] 徐宏[2] 

机构地区：[1]江苏城市职业学院,江苏南京210048 [2]南京化工职业技术学院化工系,江苏南京210048

出　　处：《安徽化工》2006年第6期32-34,共3页Anhui Chemical Industry

摘　　要：采用原粒度催化反应装置,结合物理分析化学手段,研究了添加碱金属助剂对铜系低变催化剂在低汽气比条件下稳定性和选择性的影响。发现添加一定量的某种碱金属氧化物助剂,可以减少低汽气比条件下铜系低变催化剂的甲醇生成量。在一定的添加量范围内,其变换反应性能稳定,并且甲醇副产物的生成量也较稳定,但碱金属助剂的添加对催化剂的比表面积和强度的影响较大。The effects of alkali metals promoters on the activity stability and selectivity of copper-based carbon monoxide low-temperature shift （LTS） catalysts under low steam/gas condition were investigated by XRD , BET and activity test. It was found that doping of appropriate amount of an alkali oxide promoter inhibited methanol formation over the catalyst under low steam/gas condition. Behaviors of the catalysts for LTS reaction and methanol formation kept steady in a certain range of the amount Of the alkali promoter. The alkali promoter had considerable influence on surface area and strength of the catalyst.

关 键 词：碱金属助剂 催化剂 变换 

分 类 号：TQ426.8[化学工程]