Study of the Performance of Hydrogen Adsorption on Formed and Unformed Activated Carbon

  • Dr Qingrong Zheng, Institute of Marine Engineering, Jimei University, Xiamen, Fujian 361021, China, China
  • Pr Zhenxiong Cai, Institute of Marine Engineering, Jimei University, Xiamen, Fujian 361021, China, China
  • Dr Wu Chen, Institute of Marine Engineering, Jimei University, Xiamen, Fujian 361021, China, China
  • Mr Haifeng Liao, Institute of Marine Engineering, Jimei University, Xiamen, Fujian 361021, China, China
  • Mr Chaoyu Zheng, Institute of Marine Engineering, Jimei University, Xiamen, Fujian 361021, China, China

    • Abstract: Comparative experiments were carried out to study the effect of the formation of the activated carbon on the performance of a hydrogen storage system. Acrylate was selected as a binder and different ratios of activated carbon to binder were chosen to form the activated carbon YK-1 prepared from coconut shell. Adsorption isotherms of hydrogen were respectively measured at equilibrium pressure-temperatures from 0.1 MPa to 12.5 MPa and 113 K to 293 K, the isosteric heat of hydrogen adsorption was then determined by adsorption isosteres. The temperature profile on the central region of the adsorbent bed was recorded by thermocouples during quick charge and discharge processes under pressure 10.5 MPa at ambient temperature. Results show that the mean isosteric heats of hydrogen adsorption on the formed and unformed activated carbon are respectively and , and the formation of the adsorbent brings about more than 10 K fluctuations of the temperature in the initial states of quick charge and discharge processes. Conclusions are drawn that measures of the heat transfer enhancement of the adsorbent bed and the effective management of the thermal effect should also be emphasized while forming the activated carbon.