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个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 精细化工全国重点实验室主任，教育部智能材料化工前沿科学中心执行主任，大连理工大学膜科学与技术研究开发中心主任
性别：女
毕业院校：中国科学院大连化物所
学位：博士
所在单位：化工学院
学科：化学工程. 膜科学与技术. 生物医学工程
联系方式：hgaohong@dlut.edu.cn
电子邮箱：hgaohong@dlut.edu.cn
Effects of Hydrophobicity of Diffusion Layer on the Electroreduction of Biomass Derivatives in Polymer Electrolyte Membrane Reactors
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论文类型：期刊论文
发表时间：2015-01-01
发表刊物：CHEMSUSCHEM
收录刊物：SCIE、EI、PubMed、Scopus
卷号：8
期号：2
页面范围：288-300
ISSN号：1864-5631
关键字：biomass; diffusion layers; electrochemistry; fuel cells; hydrogenation
摘要：For the first time, the hydrophobicity design of a diffusion layer based on the volatility of hydrogenation reactants in aqueous solutions is reported. The hydrophobicity of the diffusion layer greatly influences the hydrogenation performance of two model biomass derivatives, namely, butanone and maleic acid, in polymer electrolyte membrane reactors operated at atmospheric pressure. Hydrophobic carbon paper repels aqueous solutions, but highly volatile butanone can permeate in vapor form and achieve a high hydrogenation rate, whereas, for nonvolatile maleic acid, great mass transfer resistance prevents hydrogenation. With a hydrophilic stainless-steel welded mesh diffusion layer, aqueous solutions of both butanone and maleic acid permeate in liquid form. Hydrogenation of maleic acid reaches a similar level as that of butanone. The maximum reaction rate is 340 nmolcm(-2) s(-1) for both hydrogenation systems and the current efficiency reaches 70%. These results are better than those reported in the literature.