Carbon tetrachloride is an ozone depleting chemical, while chloroform is not Therefore it is important for the catalytic hydrodechlorination of CCl 4 to CHCl 3 In this paper, kinetics on the catalytic hydrogenation of...Carbon tetrachloride is an ozone depleting chemical, while chloroform is not Therefore it is important for the catalytic hydrodechlorination of CCl 4 to CHCl 3 In this paper, kinetics on the catalytic hydrogenation of carbon tetrachloride to chloroform in liquid phase was studied A reaction mechanism was proposed Hydrogen molecular was activated on the surface of catalyst, the activated hydrogen atom then reacted with CCl 4 in the solution and produced CHCl 3 A definite kinetic equation could be deduced from the reaction mechanism The reaction rate constant is concerned with the intial concentration of CCl 4 in the solution, pressure, reaction temperature and the concentration of active center All these factors were investigated over Pt Pd/C catalyst and fit in with the kinetic equation The activation energy of the reaction is 86?KJ/mol according to the experimental results [WT5H1]展开更多
研究了稀土元素对高分子负载Pt催化剂催化氢化氯代硝基苯反应的影响。结果表明:稀土元素的存在抑制了氯代硝基苯加氢反应活性,对产物氯代苯胺的选择性有不同程度的提高;碱NaOH存在时,PVP Pr Pt给出了90.8%的邻氯苯胺选择性,使用PVP La P...研究了稀土元素对高分子负载Pt催化剂催化氢化氯代硝基苯反应的影响。结果表明:稀土元素的存在抑制了氯代硝基苯加氢反应活性,对产物氯代苯胺的选择性有不同程度的提高;碱NaOH存在时,PVP Pr Pt给出了90.8%的邻氯苯胺选择性,使用PVP La Pt时得到97 2%的间氯苯胺选择性,PVP Ce Pt催化体系获得了98.2%的对氯苯胺选择性。展开更多
文摘Carbon tetrachloride is an ozone depleting chemical, while chloroform is not Therefore it is important for the catalytic hydrodechlorination of CCl 4 to CHCl 3 In this paper, kinetics on the catalytic hydrogenation of carbon tetrachloride to chloroform in liquid phase was studied A reaction mechanism was proposed Hydrogen molecular was activated on the surface of catalyst, the activated hydrogen atom then reacted with CCl 4 in the solution and produced CHCl 3 A definite kinetic equation could be deduced from the reaction mechanism The reaction rate constant is concerned with the intial concentration of CCl 4 in the solution, pressure, reaction temperature and the concentration of active center All these factors were investigated over Pt Pd/C catalyst and fit in with the kinetic equation The activation energy of the reaction is 86?KJ/mol according to the experimental results [WT5H1]
文摘研究了稀土元素对高分子负载Pt催化剂催化氢化氯代硝基苯反应的影响。结果表明:稀土元素的存在抑制了氯代硝基苯加氢反应活性,对产物氯代苯胺的选择性有不同程度的提高;碱NaOH存在时,PVP Pr Pt给出了90.8%的邻氯苯胺选择性,使用PVP La Pt时得到97 2%的间氯苯胺选择性,PVP Ce Pt催化体系获得了98.2%的对氯苯胺选择性。
