设为首页 联系我们 加入收藏

当前位置: 网站首页 期刊分类目录 2018第3期 正文

Pd/CNTs对卤代苯酚的催化加氢脱卤机理

作者:时间:2018-05-04点击数:

PDF全文下载:  201803002.pdf

 

文章编号: 16726987201803001605 DOI 10.16351/j.16726987.2018.03.002

 

兰丽娟12 杜芳林1*

(1.青岛科技大学 材料科学与工程学院,山东 青岛 266042 2.烟台大学 环境与材料工程学院,山东 烟台 264005

 

摘要: 以氢气作为氢源,考察了Pd/CNTs对液相中的4卤代苯酚的催化加氢脱卤规律,反应活性顺序:4溴苯酚>4氯苯酚>4碘苯酚>4氟苯酚。分析了4碘苯酚加氢脱碘反应活性低的原因。预先进行4碘苯酚的吸附对反应是有利的,但反应过程中生成的I-对反应不利,原因在于其在催化剂表面具有强烈的吸附作用,导致催化剂活性降低。卤代苯酚的催化加氢脱卤反应速率控制步骤为氢活性中间体的生成。

关键词: Pd/CNTs 催化加氢脱卤; 4卤代苯酚; 反应机理

中图分类号: X 703文献标志码: A

引用格式: 兰丽娟,杜芳林. Pd/CNTs对卤代苯酚的催化加氢脱卤机理\[J\]. 青岛科技大学学报(自然科学版), 2018 393): 1620.

LAN Lijuan DU Fanglin. Mechanism study on catalytic hydrodehalogenation of halogenated phenol over Pd/CNTs\[J\]. Journal of Qingdao University of Science and TechnologyNatural Science Edition), 2018, 39(3) 1620.

Mechanism Study on Catalytic Hydrodehalogenation of

Halogenated Phenol Over Pd/CNTs

 

LAN Lijuan1,2 DU Fanglin1

(1.College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;

2.School of Environment and Materials Engineering, Yantai University, Yantai 264005, China)

 

Abstract: The catalytic hydrodehalogenation of 4halogenated phenol was investigated over Pd/CNTs by using hydrogen as hydrogen source. The reaction activity order was 4bromophenol>4chlorophenol>4iodophenol>4fluorophenol. The reason for the low reactivity of 4iodophenol hydrodeiodination was analyzed. The preadsorption of 4iodophenol was beneficial to the reaction, but the high adsorption of I- on the catalysts surface would result in the decline of the catalytic activity. The reaction rate control step was the formation of hydrogen active intermediates.

Key words: Pd/CNTs catalytic hydrodehalogenationHDH);  4halophenols  reaction mechanism

 

收稿日期:  20170301

基金项目: 国家自然科学基金项目(51272115).

作者简介: 兰丽娟(1974),女,讲师.*通信联系人.

 

Copyright © 2011-2017 青岛科技大学学报 (自然科学版)