Kinetics and Mechanism of Dechlorination of o-Chlorophenol by Nanoscale Pd/Fe

作     者：WEIJian-jun XUXin-hua LIUYong 

作者机构：DepartmentofEnvironmentalEngineeringZhejiangUniversityHangzhou310027P.R.China 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2004年第20卷第1期

页      面：73-76页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：SupportedbytheReturneeFoundationMinistryofEducation(No .[2 0 0 2 ]2 4 7) 

主　　题：Nanoscale Pd/Fe Dechlorination o-Chlorophenol Kinetics Mechanism 

摘      要：Nanoscale Pd/Fe bimetallic particles were synthesized with an efficient method to dechlorinate o-chlorophenol. The nanoscale Pd/Fe particles were determined by transmission electron microscopy and BET specific surface area analysis. Most of the particles are in the size range of 20—100 nm. The BET specific surface area of synthesized nanoscale Pd/Fe particles is 12.4 m 2/g. In contrast, a commercially available fine iron powder(100 mesh) has a specific surface area of 0.49 m 2/g. Batch studies demonstrated that the nanoscale particles can effectively dechlorinate o-chlorophenol. The dechlorination reaction takes place on the surface of synthesized nanoscale Pd/Fe bimetallic particles in a pseudo-first order reaction. The surface-area-normalized rate coefficients(k_ SA) are comparable to those reported in the literature for chlorinated ethenes. The observed reaction rate constants(k_ obs) are dominated by the mass fraction of Pd and the mass concentration of the nanoscale Pd/Fe particles.