摘要
以国产C30 2铜基甲醇合成催化剂原粉为母体 ,通过成型模具和成型条件的改变 ,制备了一系列具有不同形状、尺寸和孔结构的催化剂颗粒 ,用宏观活性测试和孔结构表征的方法 ,考察了颗粒结构对催化剂宏观活性的影响。结果表明 ,对于内扩散阻止作用比较明显的工业甲醇合成过程 ,适宜的颗粒结构设计对提高催化剂的利用率具有重要意义 ;当C30 2催化剂颗粒具有 5 5nm~ 7 5nm的平均孔半径、0 4 7左右的孔隙率时 ,其结构比较适宜 ,在此基础上 ,通过改进反应沉淀工艺、提高颗粒的比表面积 ,可以较大幅度的提高催化剂的宏观活性 ;对工业常用的圆柱状C30 2催化剂颗粒 (Φ 5× 5mm) ,采用约 4 0kN·cm- 2 的成型压片强度相对比较适宜。
Using powder of C302 Cu based catalyst for methanol synthesis as material, a series of representative catalyst pellets with different shapes, sizes and pore structures were designed and extrudated The global activities and pore structure parameters of the catalyst pellets were measured and characterized, respectively The effects of pellet physical characteristics on global reaction rates were investigated The results show: (1) Suitable physical structure design of the pellet has considerable potential for further improvement of catalyst performance, because the intraparticle diffusion process has obvious influence on the global activity of the catalyst for industrial methanol synthesis (2) The suitable structure parameters of C302 catalyst pellet are the average pore radius of 5 5?nm~7 5?nm, porosity of 0 47 or so And based on these elements, the global reaction activity of C302 catalyst can be further improved by means of the reaction deposition process improvement of the catalyst powder preparation, which can increase the specific surface area of the catalyst (3) For industrial C302 catalyst pellet (Φ5×5?mm), it may be the more optimal molding condition that C302 catalyst pellet is extrudated under about 40?kN·cm -2 pressure
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2002年第5期463-467,共5页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金 (2 97760 0 3 )~~
关键词
C302
甲醇
合成
颗粒设计
宏观活性
铜基催化剂
methanol synthesis
catalyst
pellet design
global activity, catalyst engineering