Effects of water washing and torrefaction pretreatments on rice husk pyrolysis by microwave heating

被引：116
作者：
Zhang, Shuping [1 ]
Dong, Qing [1 ]
Zhang, Li [1 ]
Xiong, Yuanquan [1 ]
Liu, Xinzhi [2 ]
Zhu, Shuguang [2 ]
机构：
[1] Southeast Univ, Sch Energy & Environm, Key Lab Energy Thermal Convers & Control, Minist Educ, Nanjing 210096, Jiangsu, Peoples R China
[2] Nanjing Univ Sci & Technol, Sch Energy & Power Engn, Nanjing 210094, Jiangsu, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2015年 / 193卷
基金：
美国国家科学基金会;
关键词：
Water washing; Torrefaction; Pretreatment; Microwave; Pyrolysis; STEAM GASIFICATION; BIO-OIL; BIOMASS; PRODUCTS; COMBUSTION; OPERATIONS; RESIDUES; KINETICS; SAWDUST; QUALITY;
D O I：
10.1016/j.biortech.2015.06.142
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The influences of water washing, torrefaction and combined water washing-torrefaction pretreatments on microwave pyrolysis of rice husk samples were investigated. The results indicated that the process of combined water washing-torrefaction pretreatment could effectively remove a large portion of inorganics and improve the fuel characteristics to a certain extent. The gas products were rich in combustible compositions and the syngas quality was improved by pretreatment process. The liquid products contained less moisture content, acids and furans, while more concentrated phenols and sugars from microwave pyrolysis of rice husk after pretreatments, especially after the combined water washing-torrefaction pretreatment. Biochar, produced in high yield, has the alkaline pH (pH 8.2-10.0) and high surface area (S-BET 157.81-267.84 m(2)/g), they have the potential to be used as soil amendments. It is noteworthy that water washing increased the pore surface area of biochar, but torrefaction reduced the pore surface area. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：442 / 448
页数：7
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