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不同原料制备的生物炭形貌结构及表面特性研究
王彤彤1; 王晓琳1; 任志胜1; 郑纪勇1,2
2017
Source Publication环境科学与技术
Volume40Issue:1Pages:42-48
Abstract

选取槐树皮、锯末、苹果枝、玉米秸秆、杂木五种原料,采用干蒸裂解工艺制备生物炭,通过扫描电子显微镜(SEM)观察生物炭
的形貌结构,利用氮气吸附 BET 容量法,测定生物炭的比表面积和孔体积,获得吸附脱附等温线,根据吸附等温线计算 BJH 孔径分布,并
将 5 种生物炭的形貌结构和表面特性对比分析,以期为生物炭深入研究提供科学依据。结果表明:5 种生物炭均表现为多孔结构,孔结构
大小和形状各异;不同原料对生物炭的比表面积有影响,杂木生物炭的比表面积最大(17.807 m 2 /g),苹果枝生物炭最小(1.674 m 2 /g)。随着
玉米秸秆、锯末、槐树皮、杂木生物炭的孔体积和孔径的减小,其比表面积依次增大;槐树皮、锯末、玉米秸秆生物炭的氮气吸附脱附等温
线为Ⅲ型,属于结块形成,苹果枝、杂木生物炭为Ⅳ型;5 种生物炭均在 2~65 nm 范围内孔径分布较宽,呈中孔和大孔。

Other Abstract

Five raw materials: Sophora japonica skin, sawdust, apple branch, corn stalk, and miscellaneous wood were
selected for producing biochars through pyrolysis without oxygen supply. The microscopic morphology of biochar were
characterized by SEM, the specific surface area and pore size distribution was measured using the method of BET with
nitrogen adsorption, and the pore size distribution of BJH equation was investigated based on adsorption-desorption isotherms.
The microscopic morphology and surface features of above-mentioned five kinds of biochar were comparatively analyzed in
order to provide scientific basis for further study. Findings of the study revealed that five different kinds of biochar had their
own porous structures in terms of size and shape, as well as specific surface area due to the different raw materials; the
biochar derived from miscellaneous wood had the largest specific surface area (17.807 m 2 /g), while the biochar derived from
apple branch had the minimum (1.674 m 2 /g); and with decreases of the pore volume and pore diameter of the biochars, the
specific surface areas of them increased. In addition, the adsorption-desorption isotherms of three biochars (Sophora japonica
skin, sawdust, corn stalk) was type Ⅲ belonging to agglomerate formation, on the other hand the biochars of apple branch and
miscellaneous wood was type Ⅳ. The pore diameters of the five biochars ranged widely (2 to 65 nm), featuring the size from
mesopore to macropore.

Keyword生物炭 形貌结构 Bet 比表面积 孔径分析 不同原料
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8366
Collection水保所知识产出(1956---)
Corresponding Author郑纪勇
Affiliation1.西北农林科技大学资源环境学院,陕西 杨凌 712100
2.中国科学院水利部水土保持研究所 黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西 杨凌 712100
Corresponding Author Affilication中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
王彤彤,王晓琳,任志胜,等. 不同原料制备的生物炭形貌结构及表面特性研究[J]. 环境科学与技术,2017,40(1):42-48.
APA 王彤彤,王晓琳,任志胜,&郑纪勇.(2017).不同原料制备的生物炭形貌结构及表面特性研究.环境科学与技术,40(1),42-48.
MLA 王彤彤,et al."不同原料制备的生物炭形貌结构及表面特性研究".环境科学与技术 40.1(2017):42-48.
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