Comparative study on one-step pyrolysis activation of walnut shells to biochar at different heating rates

被引：21

作者：

Abdullahi, Shagali Abdulmajid ^{[1
]}

Hu Song ^{[1
,2
]}

Wang Yankui ^{[1
]}

Li Hanjian ^{[1
]}

Wang Yi ^{[1
,2
]}

Su Sheng ^{[1
,2
]}

Xiang Jun ^{[1
,2
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Peoples R China

[2] Huazhong Univ Sci & Technol, China EU Inst Clean & Renewable Energy, Wuhan 430074, Peoples R China

来源：

ENERGY REPORTS | 2021年 / 7卷

基金：

中国国家自然科学基金;

关键词：

Walnut shells; Pyrolysis; One-step activation; Biochar; Heating rate; CARBON; TEMPERATURE; ADSORPTION; SURFACE; STRAW; TIME;

D O I：

10.1016/j.egyr.2021.10.021

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Pyrolysis of walnut shells to biochar at 700 degrees C using N-2 gas was compared to one-step activation using steam/KOH under four different heating rates (10-40 degrees C/min). Steam biochars developed better surface area property of 342-556 m(2)/g compared to others (19-135 m(2)/g) over the same heating rates; meanwhile, increasing heating rate caused functional groups alteration and was distinct on the surface area property as about six-fold and two-fold difference from the lower to higher rates were recorded in neutral char and the steam/KOH activated biochars respectively. Increasing heating rate affected the neutral and steam biochars' Raman intensity ratio whereas trivial influence was recorded on KOH-biochars. (C) 2021 The Author(s). Published by Elsevier Ltd.

引用

页码：388 / 396

页数：9

共 27 条

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