SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2014, Vol. 22 ›› Issue (5): 570-575.DOI: 10.1016/S1004-9541(14)60076-8

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Adsorption Refrigeration Performance of Shaped MIL-101-Water Working Pair

RUI Zhengqiu, LI Quanguo, CUI Qun, WANG Haiyan, CHEN Haijun, YAO Huqing   

  1. College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
  • Received:2012-09-07 Revised:2012-10-14 Online:2014-05-06 Published:2014-05-28

Adsorption Refrigeration Performance of Shaped MIL-101-Water Working Pair

芮征球, 李全国, 崔群, 王海燕, 陈海军, 姚虎卿   

  1. College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
  • 通讯作者: CUI Qun,E-mail: cuiqun@njtech.edu.cn

Abstract: A new metal-organic framework of MIL-101 was synthesized by hydrothermal method and the powder prepared was pressed into a desired shape. The effects of molding on specific surface area and pore structure were investigated using a nitrogen adsorption method. The water adsorption isotherms were obtained by high vacuum gravimetric method, the desorption temperature of water on shaped MIL-101 was measured by thermo gravimetric analyzer, and the adsorption refrigeration performance of shaped MIL-101-water working pair was studied on the simulation device of adsorption refrigeration cycle system. The results indicate that an apparent hysteresis loop appears in the nitrogen adsorption/desorption isotherms when the forming pressure is 10 MPa. The equilibrium adsorption capacity of water is up to 0.95 kg·kg-1 at the forming pressure of 3 MPa (MIL-101-3). The desorption peak temperature of water on MIL-101-3 is 82℃, which is 7℃ lower than that of silica gel, and the desorption temperature is no more than 100℃. At the evaporation temperature of 10℃, the refrigeration capacity of MIL-101-3-water is 1059 kJ·kg-1, which is 2.24 times higher than that of silica gel-water working pair. Thus MIL-101-water working pair presents an excellent adsorption refrigeration performance.

Key words: adsorption refrigeration, MIL-101, forming, adsorption capacity, refrigeration capacity

摘要: A new metal-organic framework of MIL-101 was synthesized by hydrothermal method and the powder prepared was pressed into a desired shape. The effects of molding on specific surface area and pore structure were investigated using a nitrogen adsorption method. The water adsorption isotherms were obtained by high vacuum gravimetric method, the desorption temperature of water on shaped MIL-101 was measured by thermo gravimetric analyzer, and the adsorption refrigeration performance of shaped MIL-101-water working pair was studied on the simulation device of adsorption refrigeration cycle system. The results indicate that an apparent hysteresis loop appears in the nitrogen adsorption/desorption isotherms when the forming pressure is 10 MPa. The equilibrium adsorption capacity of water is up to 0.95 kg·kg-1 at the forming pressure of 3 MPa (MIL-101-3). The desorption peak temperature of water on MIL-101-3 is 82℃, which is 7℃ lower than that of silica gel, and the desorption temperature is no more than 100℃. At the evaporation temperature of 10℃, the refrigeration capacity of MIL-101-3-water is 1059 kJ·kg-1, which is 2.24 times higher than that of silica gel-water working pair. Thus MIL-101-water working pair presents an excellent adsorption refrigeration performance.

关键词: adsorption refrigeration, MIL-101, forming, adsorption capacity, refrigeration capacity