Fabrication and Thermal Conductivity Improvement of Novel Composite Adsorbents adding with Nanoparticles  

作　　者：WU Qibai YU Xiaofen ZHANG Haiyan CHEN Yiming LIU Liying XIE Xialin TANG Ke LU Yiji WANG Yaodong ROSKILLY Anthony Paul 

机构地区：[1]School of Materials and Energy, Guangdong University of Technology [2]Sir Joseph Swan Centre for Energy Research, Newcastle University

出　　处：《Chinese Journal of Mechanical Engineering》2016年第6期1114-1119,共6页中国机械工程学报（英文版）

基　　金：Supported by National Natural Science Foundation of China(No.51276044);Science and Technology Planning Project of Guangdong Province,China(Grant Nos.2015A050502047,2015B010135011);Science and Technology Planning Project of Guangzhou City,China(Grant Nos.201508030018,2016201604030040);Youth Foundation of Guangdong University of Technology,China(Grant No.252151038);EPSRC Grants(Grant Nos.EP/I027904/1,EP/K004689/1,EP/M008088/1);IChemE Global Awards 2015:MCSA for FP&VA

摘　　要：Thermal conductivity is one of key parameters of adsorbents, which will affect the overall system performance of adsorption chiller. To improve adsorbent＇s thermal conductivity is always one of research focuses in chemisorption field. A new chemical composite adsorbent is fabricated by adding carbon coated metal（Aluminum and Nickel） nanoparticles with three different addition amounts into the mixture of chloride salts and natural expanded graphite aiming to improve the thermal conductivity. The preparation processes and its thermal conductivity of this novel composite adsorbent are reported and summarized. Experimental results indicate that the nanoparticles are homogenously dispersed in the composite adsorbent by applying the reported preparation processes. The thermal conductivity of the composite adsorbent can averagely enlarge by 20% when the weight ratio of the added nanoparticles is 10 wt%. Moreover, carbon coated aluminum nanoparticles exhibit more effective enlargement in thermal conductivity than nickel nanoparticles. As for the composite adsorbent of CaCl2-NEG, there is a big reinforcement from 30% to 50% for Al@C nanoparticles, however only 10% in maximum caused by Ni@C nanoparticles. The proposed research provides a methodology to design and prepare thermal conductive chemical composite adsorbent.Thermal conductivity is one of key parameters of adsorbents, which will affect the overall system performance of adsorption chiller. To improve adsorbent＇s thermal conductivity is always one of research focuses in chemisorption field. A new chemical composite adsorbent is fabricated by adding carbon coated metal（Aluminum and Nickel） nanoparticles with three different addition amounts into the mixture of chloride salts and natural expanded graphite aiming to improve the thermal conductivity. The preparation processes and its thermal conductivity of this novel composite adsorbent are reported and summarized. Experimental results indicate that the nanoparticles are homogenously dispersed in the composite adsorbent by applying the reported preparation processes. The thermal conductivity of the composite adsorbent can averagely enlarge by 20% when the weight ratio of the added nanoparticles is 10 wt%. Moreover, carbon coated aluminum nanoparticles exhibit more effective enlargement in thermal conductivity than nickel nanoparticles. As for the composite adsorbent of CaCl2-NEG, there is a big reinforcement from 30% to 50% for Al@C nanoparticles, however only 10% in maximum caused by Ni@C nanoparticles. The proposed research provides a methodology to design and prepare thermal conductive chemical composite adsorbent.

关 键 词：thermal conductivity carbon coated metal nanoparticles chemical composite adsorbent 

分 类 号：TQ424[化学工程] TB383.1[一般工业技术—材料科学与工程]