Chemical and structural characterization of char development during lignocellulosic biomass pyrolysis

被引：43

作者：

Mafu, Lihle D. ^{[1
]}

Neomagus, Hein W. J. P. ^{[1
,2
]}

Everson, Raymond C. ^{[1
,2
]}

Strydom, Christien A. ^{[1
]}

Carrier, Marion ^{[3
]}

Okolo, Gregory N. ^{[2
]}

Bunt, John R. ^{[2
]}

机构：

[1] North West Univ, Sch Phys & Chem Sci, CRB, Potchefstroom Campus,Private Bag X6001, ZA-2520 Potchefstroom, South Africa

[2] North West Univ, Sch Chem & Minerals Engn, Private Bag X6001,Potchefstroom Campus, ZA-2520 Potchefstroom, South Africa

[3] Aston Univ, EBRI, Bioenergy Res Grp, Birmingham B4 7ET, W Midlands, England

来源：

BIORESOURCE TECHNOLOGY | 2017年 / 243卷

基金：

新加坡国家研究基金会;

关键词：

Aromaticity; ATR-FTIR; Biochar; CPMAS C-13 NMR; Pyrolysis; GASIFICATION REACTIVITY; WOODY BIOMASS; C-13; NMR; TEMPERATURE; BIOCHAR; CELLULOSE; LIGNIN; COALS; HEMICELLULOSE; COMBUSTION;

D O I：

10.1016/j.biortech.2017.07.017

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The chemical and structural changes of three lignocellulosic biomass samples during pyrolysis were investigated using both conventional and advanced characterization techniques. The use of ATR-FTIR as a characterization tool is extended by the proposal of a method to determine aromaticity, the calculation of both CH2/CH3 ratio and the degree of aromatic ring condensation ((R/C)(u)). With increasing temperature, the H/C and O/C ratios, XA and CH2/CH3 ratio decreased, while (R/C)(u) and aromaticity increased. The micropore network developed with increasing temperature, until the coalescence of pores at 1100 degrees C, which can be linked to increasing carbon densification, extent of aromatization and/or graphitization of the biomass chars. WAXRD-CFA measurements indicated the gradual formation of nearly parallel basic structural units with increasing carbonization temperature. The char development can be considered to occur in two steps: elimination of aliphatic compounds at low temperatures, and hydrogen abstraction and aromatic ring condensation at high temperatures. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：941 / 948

页数：8

共 45 条

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