乙烯气相法制醋酸乙烯Pd-Au催化剂研究进展
Research progress on Pd-Au catalyst for producing vinyl acetate by ethylene gas phase process
任栎 1张向辉 1王光永 1陈鹏 1李克兵 1丁明月 1姚佩 1赵安民1
作者信息
- 1. 西南化工研究设计院有限公司 工业排放气综合利用国家重点实验室,国家碳一化学工程技术研究中心,四川成都 610225
- 折叠
摘要
醋酸乙烯(VAc)是重要的化工原料,具有良好的应用价值.随着光伏行业的迅速发展以及环保要求的提升,我国对高品质醋酸乙烯(即乙烯气相法醋酸乙烯)的需求逐年增加,开发高催化活性、高目标产物选择性、高稳定性以及低成本的乙烯气相法制醋酸乙烯Pd-Au催化剂具有重要意义.首先,综述了乙烯气相法制醋酸乙烯催化剂的发展,概述了Pd-Au催化剂的载体、活性组分以及醋酸钾助剂的作用,分析了乙烯气相法制醋酸乙烯的两种反应机理和Pd-Au催化剂的失活原因,阐述了由浸渍法制得蛋壳型Pd-Au催化剂的制备过程.然后,总结了研究者为进一步提高催化性能、降低催化剂成本在催化剂改进方面的研究成果,包括载体改性和异型化,以及活性组分的浸渍、陈化、还原、水洗及干燥等步骤的改进.最后,提出了未来乙烯气相法醋酸乙烯催化剂的研究方向.
Abstract
Vinyl acetate(VAc)is an important chemical raw material with well application value.With the rapid development of the photovoltaic industry and the improvement of environmental protection requirements,the demand for high-quality vinyl acetate(i.e.,ethylene gas phase process vinyl acetate)in China is increasing year by year.It is of great significance to develop the catalyst with high catalytic activity,high target product selectivity,high stability and low cost.Firstly,the development of catalysts for producing ethylene acetate by ethylene gas phase process was reviewed.The functions of catalyst supports,active components and potassium acetate additive were summarized.The two reaction mechanisms of producing vinyl acetate by ethylene gas phase process and the deactivation causes of Pd-Au catalyst were analyzed.The preparation process of eggshell Pd-Au catalyst by impregnation method was described.Then the research results of catalyst improvement for the purpose of further improving catalytic performance and reducing catalyst cost were summarized,including modification and deformalization of supports,and improvement of procedures,such as impregnation of active components,aging,reduction,washing and drying.Lastly,the research direction of catalyst for producing vinyl acetate by ethylene gas phase process in the future was proposed.
关键词
醋酸乙烯/乙烯气相法/Pd-Au催化剂/催化剂改进Key words
vinyl acetate/ethylene gas-phase process/Pd-Au catalyst/catalyst improvement引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据