羟基磷灰石负载钯催化剂用于H2和O2直接合成H2O2的动力学

doi:10.3969/j.issn.0438-1157.2014.01.019

化工学报 ›› 2014, Vol. 65 ›› Issue (1): 152-159.DOI: 10.3969/j.issn.0438-1157.2014.01.019

• 催化、动力学与反应器 • 上一篇下一篇

羟基磷灰石负载钯催化剂用于H₂和O₂直接合成H₂O₂的动力学

欧阳李科, 笪国进, 田鹏飞, 陈天元, 徐晶, 韩一帆

华东理工大学化学工程联合国家重点实验室上海 200237

收稿日期:2013-07-01 修回日期:2013-09-06 出版日期:2014-01-05 发布日期:2014-01-05
通讯作者: 韩一帆
作者简介:欧阳李科（1987-），男，博士研究生。
基金资助:
国家自然科学基金项目（21176071，21106041，21273070）。

Kinetics of synthesis of hydrogen peroxide directly from H₂ and O₂ over Pd/HAp catalyst

OUYANG Like, DA Guojin, TIAN Pengfei, CHEN Tianyuan, XU Jing, HAN Yifan

State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2013-07-01 Revised:2013-09-06 Online:2014-01-05 Published:2014-01-05
Supported by:
supported by the National Natural Science Foundation of China (21176071, 21106041, 21273070).

摘要/Abstract

摘要： H₂和O₂直接合成H₂O₂过程绿色环保，反应具有原子经济性，是最有潜力的H₂O₂合成新方法之一。采用等量浸渍法，将Pd负载于羟基磷灰石（HAp）载体上，得到了高分散的Pd/HAp纳米催化剂，Pd平均粒径2.5 nm。运用幂指数模型，研究该催化剂在H₂O₂加氢及H₂和O₂直接合成反应中的动力学，计算得到H₂O₂加氢、H₂O₂和H₂O的生成反应的表观活化能及O₂、H₂表观反应级数。结果表明低温及高O₂分压有利于H₂O₂的生成，而高H₂分压则有利于H₂O的生成。

关键词: 合成, 羟基磷灰石, 催化剂, 动力学

Abstract: H₂O₂synthesis directly from H₂ and O₂, as a "green process" and "atomic-economic reaction", is one of the most promising processes for replacing anthraquinone autoxidation process. In this paper, Pd/HAp (hydroxylapatite) catalyst was prepared by the conventional incipient-wetness impregnation method and highly dispersed Pd particles with an average size of 2.5 nm were obtained. Kinetic studies of H₂O₂ hydrogenation and direct synthesis of H₂O₂ were performed over a Pd/HAp catalyst and apparent activation energies and reaction orders with respect to H₂ and O₂ were calculated by power law functional models. Kinetic parameters indicated that the formation of H₂O₂ was favored at a lower reaction temperatures and higher O₂ partial pressure, while higher H₂ partial pressure would facilitate H₂O formation.

Key words: synthesis, hydroxylapatite, catalyst, kinetics

中图分类号:

O614.8

欧阳李科, 笪国进, 田鹏飞, 陈天元, 徐晶, 韩一帆. 羟基磷灰石负载钯催化剂用于H₂和O₂直接合成H₂O₂的动力学[J]. 化工学报, 2014, 65(1): 152-159.

OUYANG Like, DA Guojin, TIAN Pengfei, CHEN Tianyuan, XU Jing, HAN Yifan. Kinetics of synthesis of hydrogen peroxide directly from H₂ and O₂ over Pd/HAp catalyst[J]. CIESC Journal, 2014, 65(1): 152-159.

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羟基磷灰石负载钯催化剂用于H₂和O₂直接合成H₂O₂的动力学

Kinetics of synthesis of hydrogen peroxide directly from H₂ and O₂ over Pd/HAp catalyst

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