NDLI: Characterization and methanol adsorption of walnut-shell activated carbon prepared by KOH activation

Content Provider	Springer Nature Link
Author	Yu, Qiongfen Li, Ming Ji, Xu Qiu, Yu Zhu, Yuntao Leng, Congbin
Copyright Year	2016
Abstract	Walnut-shell activated carbons (WSACs) were prepared by the KOH chemical activation. The effects of carbonization temperature, activation temperature, and ratio of KOH to chars on the pore development of WSACs were investigated. Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), and scanning electron microscopy (SEM) were employed to characterize the microstructure and morphology of WSACs. Methanol adsorption performance onto the optimal WSAC and the coal-based AC were also investigated. The results show that the optimal preparation conditions are a carbonization temperature of 700 °C, an activation temperature of 700 °C, and a mass ratio of 3. The BET surface area, the micropore volume, and the micropore volume percentage of the optimal WASC are 1636 m$^{2}$/g, 0.641 cm$^{3}$/g and 81.97%, respectively. There are a lot of micropores and a certain amount of meso- and macropores. The characteristics of the amorphous state are identified. The results show that the optimal WSAC is favorable for methanol adsorption. The equilibrium adsorption capacity of the optimal WSAC is 248.02mg/g. It is shown that the equilibrium adsorption capacity of the optimal WSAC is almost equivalent to that of the common activated carbon. Therefore the optimal WSAC could be a potential adsorbent for the solar energy adsorption refrigeration cycle.
Starting Page	260
Ending Page	268
Page Count	9
File Format	PDF
ISSN	10002413
Journal	Journal of Wuhan University of Technology-Mater. Sci. Ed.
Volume Number	31
Issue Number	2
e-ISSN	19930437
Language	English
Publisher	Wuhan University of Technology
Publisher Date	2016-04-13
Publisher Place	Wuhan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	walnut-shell activated carbon preparation conditions characterization methanol adsorption Materials Science
Content Type	Text
Resource Type	Article
Subject	Materials Science

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