Citation: LI Wen-yue, WU Shi-yong, WU You-qing, HUANG Sheng, GAO Jin-sheng. Pore structure characterization of coconut shell char with narrow microporosity[J]. Journal of Fuel Chemistry and Technology, ;2019, 47(3): 297-305. shu

Pore structure characterization of coconut shell char with narrow microporosity

LI Wen-yue ^1,2 ,
WU Shi-yong ^1,2,, ,
WU You-qing ^1,2 ,
HUANG Sheng ^1,2 ,
GAO Jin-sheng ^1,2

1.
Department of Chemical Engineering for Energy Resources, East China University of Science and Technology, Shanghai 200237, China
2.
Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China

Corresponding author: WU Shi-yong, wsy@ecust.edu.cn
Received Date: 13 December 2018
Revised Date: 16 January 2019

Fund Project: the Fundamental Research Funds for the Central Universities 222201718003The project was supported by the Fundamental Research Funds for the Central Universities (222201718003) and Projects of the Shanghai Science and Technology Committee (17DZ1202604)Projects of the Shanghai Science and Technology Committee 17DZ1202604

Figures(7)

To get more insight into the pore structure characterization of nanoporous biomass chars, different probe molecules, models, and calibration steps were used and compared. The coconut shell chars (CSCs) were prepared under a steam atmosphere and characterized using N₂, Ar, and CO₂ adsorption. The results show that coconut shell chars are suitable for further activation, due to the high carbon content and abundant porosity. Ar adsorption with application of Non-Local Density Functional Theory (NLDFT) model can more accurately characterize the pore structure of CSC. When the calibration step is performed before adsorption measurement, the important results of N₂ and Ar adsorption, such as pores size distribution (PSD) and isotherm, are affected by pore blocking, leading to the erroneous understanding of CSC in special applications. Vacuum treatment at 273 K for 1 h after He calibration is enough to remove He, which could reduce effect of pore blocking.
- adsorption,
- pore structure characterization,
- coconut shell char,
- He calibration,
- pore blocking
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沈阳化工大学材料科学与工程学院沈阳 110142