Effect of chemical species in alkali agents on pore structure at activated carbon of rice husks

DOI Web Site 参考文献19件
  • Ono Hiroki
    Department Material and Science Technology, Nagaoka University of Technology
  • Akasaka Hiroki
    Department Material and Science Technology, Nagaoka University of Technology
  • Toda Ikumi
    Department Material and Science Technology, Nagaoka University of Technology
  • Tanaka Hiroe
    Department Material and Science Technology, Nagaoka University of Technology
  • Watanabe Takuhiro
    Department Material and Science Technology, Nagaoka University of Technology
  • Ooki Satoshi
    Fuse Technonet Co., LTD.
  • Tanaka Yoshihisa
    Fuse Technonet Co., LTD.
  • Takada Fujio
    Fuse Technonet Co., LTD.
  • Ohshio Shigeo
    Department Material and Science Technology, Nagaoka University of Technology
  • Himeno Syuji
    Department Civil and Environmental Engnieering, Nagaoka University of Technology
  • Kokubu Toshinori
    Department of Chemical Science and Engieering, Miyakonojo National College of Technology
  • Saitoh Hidetoshi
    Department Material and Science Technology, Nagaoka University of Technology

抄録

To understand effect of chemical reactions of the activation process on pore structures, the activated carbon materials were fabricated by two types of chemical agent for the activation process from rice husk ashes. NaOH and Na2CO3 were used as a chemical agent. And their pore structure and hydrogen storage ability were estimated on temperature range from 77 to 298 K. The porous carbon activated by NaOH involved pores of 0.6, 1.1 and 1.5 nm diameter. The pore sizes in porous carbon activated by Na2CO3 were 0.6 and 1.5 nm in diameter. These results indicated that pore structures could be controlled by chemical agents on the activation. The hydrogen storage ability of the porous carbon material activated by NaOH was the same as that activated by Na2CO3 and the value was about 0.5 wt.% at 298 K. With a decrease in temperature, hydrogen storage ability was increased, and the difference of the maximum amount of stored hydrogen on these two porous carbon materials was made larger. The hydrogen storage ability at 77 K porous carbons activated by NaOH and Na2CO3 indicated 3.7 and that for Na2CO3 was 2.1 wt.%. From pore size distributions and temperature dependence, it was suggested that the size of pore for the hydrogen storage changed from 0.6 nm to both 0.6 and 1.1 nm with decreasing temperature.

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