毛丽秋,郑净植.在改性高岭土催化剂上甲醇脱水生成二甲醚的动力学考察[J].分子催化,2000,(5):379-383
在改性高岭土催化剂上甲醇脱水生成二甲醚的动力学考察
Study on Kinetics of Methanol Dehydration to Dimethyl Ether on Modified Kaolin
  修订日期:1999-03-20
DOI:
中文关键词:  甲醇 二甲醚 改性高岭土 催化剂 催化动力学
英文关键词:Methanol,Dimethyl ether,Modified kaolin,Kinetics
基金项目:湖南省自然科学基金!资助项目 ( 97JJY2 0 58)
毛丽秋  郑净植
[1]湖南师范大学精细催化合成研究所,长沙 [2]湖北襄樊工学院化工系,襄樊
摘要点击次数: 854
全文下载次数: 17
中文摘要:
      采用积分反应器,考察了常压下在改性高岭土(MK)催化剂上甲醇脱水生成二甲醚的反应动力学,根据Langmuir均匀吸附理论,采用R-E机理,推断吸附的甲醇分子与气相主体中的甲醇分子发生的表面反应为速率控制步骤(RDS),得到双曲线型动力学方程为:r=ksbMpM^2/(1+bMpM+bpE)r为反应速率,ks为反应速率常数,bM为甲醇的吸附平衡常数,b为二甲醚和水的吸附平衡常数之和,pM、pE分别为
英文摘要:
      Kinetics of methanol dehydration to dimethyl ether on modified kaolin catalyst was studied in an integral reactor under normal pressure. It is deduced that the surface reaction of methanol molecule adsorbed on the active site of catalyst with methanol molecule in gas phase is the rate determining step(RDS). The hyperbolic type kinetic equation r = k \-s b \-M p M 2/(1+ b \-M p M+ b p E) is obtained according to the theory of langmuir even adsorption and using the R\|E mechanism. The activation energy of surface reaction is 79.1 kJ/mol. Mean square regress was used in data processing and evaluation of parameters.
HTML  查看全文  查看/发表评论  下载PDF阅读器