多孔硅胶固化吸附剂吸附性能研究  

Study on Adsorption Performance of Porous Consolidated Silica-Gel Adsorbents

作　　者：何兆红[1,2] 刘林[1,2] 邓立生 黄宏宇[1,2] 小林敬幸[3] HE Zhao-Hong;LIU Lin;HUANG Hong-Yu;KOBAYASHI Noriyuki(Key Laboratory of Renewable Energy,Chinese Academy of Sciences,Guangzhou 510640,China;Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;Nagoya University,Nagoya 4648601,Japan)

机构地区：[1]中国科学院可再生能源重点实验室,广州510640 [2]中国科学院广州能源研究所,广州510640 [3]日本名古屋大学,名古屋4648601

出　　处：《工程热物理学报》2018年第11期2494-2497,共4页Journal of Engineering Thermophysics

基　　金：中国科学院国际访问学者项目(No.2017VEB0001);广东省科技计划项目(No.2016A050502040)

摘　　要：固化吸附剂是提高吸附剂传热性能的重要方式,但是恶化了吸附剂的传质性能。以羧甲基纤维素(CMC)为黏结剂的多孔固化吸附剂利用CMC部分分解,在层间产生丰富的孔道,降低了吸附剂的传质阻力,具有强化吸附剂传质作用。本文对多孔硅胶固化吸附剂开展了容量法吸附性能评价、压汞法测试以及吸附性能计算,结果表明,多孔固化吸附剂层内存在一定量的大孔,改善了吸附剂传质特性;根据细孔扩散和表面扩散的计算方法,分别获得多孔硅胶固化吸附剂的细孔扩散系数和表面扩散系数。The consolidation of adsorbents is an effective way to improve heat transfer performance of adsorbents. However, it inevitably worsens mass transfer performance of adsorbents. Based on the principle of partial decomposition of CMC, the abundant pores were formed in adsorbents with carboxyl methyl cellulose （CMC） as the binder. Therefore, the mass transfer resistance of adsorbents can be reduced, and the mass transfer performance of adsorbents is enhanced. In this paper, the adsorption performances and porous properties of porous consolidated silica-gel adsorbents were evaluated by the laboratory-built volumetric testing device and Mercury intrusion porosimetry （MIP）, respectively. Moreover, the adsorption performances were calculated by the tested experimental data. The experimental results shows that a certain number of macropores were formed in the adsorbent layer, which improved the mass transfer performance adsorbents. The pore diffusion coefficient and surface diffusion coefficient of the adsorbents were obtained by the calculation method of pore diffusion and surface diffusion.

关 键 词：多孔硅胶 固化吸附剂 吸附性能 

分 类 号：TK173[动力工程及工程热物理—热能工程]