基于热重红外的硫酸盐法黑液热解特性分析

doi:10.3969/j.issn.0253-2417.2014.03.004

林产化学与工业 ›› 2014, Vol. 34 ›› Issue (3): 22-26.doi: 10.3969/j.issn.0253-2417.2014.03.004

基于热重红外的硫酸盐法黑液热解特性分析

刘超, 武书彬, 戴涛

华南理工大学制浆造纸工程国家重点实验室, 广东广州 510640

收稿日期:2013-05-13 出版日期:2014-06-25 发布日期:2014-06-25
通讯作者: 武书彬，男，教授，博士生导师，从事植物纤维类生物质化学结构、植物纤维类生物质转化为清洁能源和化工原料等方面的研究；E-mail：shubinwu@scut.edu.cn。 E-mail:shubinwu@scut.edu.cn
作者简介:刘超（1990- ），男，江苏扬中人，硕士生，主要从事生物质转化与利用方面的研究
基金资助:
国家973计划资助（2013CB228101）；国家自然科学基金资助项目（31270635，21176095）

TG-FT-IR Analysis of Pyrolysis Characteristics of Sulfate Black Liquor

LIU Chao, WU Shu-bin, DAI Tao

State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China

Received:2013-05-13 Online:2014-06-25 Published:2014-06-25

摘要/Abstract

摘要： 为了深入地探讨黑液热解的反应机理以及黑液热解过程中产物的释放规律，采用热重-红外联用（TG-FT-IR）技术对竹子和桉木混合硫酸盐法制浆黑液固形物（BLS）的热裂解过程进行了研究。TG-FT-IR结果显示，BLS热解产物的释放主要集中在500~2 000 s，热解产物主要是CO₂、CH₄、H₂O、CO、醇酚类化合物和醛酮类化合物。BLS的整个热解过程可分为3个阶段，第1阶段的失重主要是原料中结合水的挥发引起的，此阶段的最大失重速率出现在 105℃；第2失重阶段主要发生在173~518℃，失重率约为 25.19%，主要产物是CO₂、CH₄、H₂O、醇酚类化合物、醛酮类化合物以及少量的CO，此阶段CO₂的生成量最大；第3阶段主要发生在722~1 000℃，失重率接近39.05%，产物主要是CO，其它小分子产物的产率都很低。

关键词: 硫酸盐法, 黑液, 热解, 热重红外

Abstract: To investigate the pyrolysis mechanism and the release law of pyrolysis products, the sulfate black liquor (BLS) from bamboo & eucalyptus was pyrolyzed and the process was investigated by thermogravimetric analyzer coupled with Fourier transform infrared spectrometry (TG-FT-IR). The results revealed that the release of BLS pyrolysis products, such as CO₂, CH₄, H₂O, CO and alcohols & phenols, aldehydes & ketones, were mainly concentrated in 500-2 000 s. The BLS pyrolysis process could be divided into three stages. The weight loss in the first stage should be attributed to the release of bound water in the raw material and the maximum weight loss rate was observed at 105℃. During the second weight loss stage from 173℃ to 518℃, the weight loss rate was about 25.19%, and the release products were CO₂, CH₄, H₂O, alcohols & phenols, aldehydes & ketones and a small amount of CO, and CO₂ was the dominant product. The third weight loss stage was from 722℃ to 1 000℃, and the weight loss rate was nearly 39.05%. In this stage, CO was the dominant product and very few amounts of other small molecule products were observed.

Key words: sulfate, black liquor, pyrolysis, TG-FT-IR

中图分类号:

TQ35
TK6

刘超, 武书彬, 戴涛. 基于热重红外的硫酸盐法黑液热解特性分析[J]. 林产化学与工业, 2014, 34(3): 22-26.

LIU Chao, WU Shu-bin, DAI Tao. TG-FT-IR Analysis of Pyrolysis Characteristics of Sulfate Black Liquor[J]. Chemistry and Industry of Forest Products, 2014, 34(3): 22-26.

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基于热重红外的硫酸盐法黑液热解特性分析

TG-FT-IR Analysis of Pyrolysis Characteristics of Sulfate Black Liquor

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