Thermogravimetric analysis-Fourier transform infrared analysis of palm oil waste pyrolysis
Thermogravimetric analysis-Fourier transform infrared analysis of palm oil waste pyrolysis
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DOI：
10.1021/ef030193m
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发表时间：
2004-11-01
期刊：
影响因子：
5.3
通讯作者：
Zheng, CG
中科院分区：
文献类型：
--
作者：
Yang, HP;Yan, R;Zheng, CG
本研究的目的是确定棕榈油废物的热解特性和气体产物性质，促进将废物转化为能源的总体思路。棕榈油废料含有大约50%的碳，7%的氢和微量的灰。这些废物的低热值（LHV）接近20 MJ/kg。它们是生产生物燃料的理想能源。热分析表明，这些废物很容易分解，在220度到340度的缓慢加热速率下，它们的大部分重量会消失。热解过程可分为水分蒸发、半纤维素分解、纤维素分解和木质素降解四个阶段。动力学分析表明，棕榈油废弃物与三种模式生物质组分（半纤维素、纤维素和木质素）热解的反应顺序为1。棕榈油废弃物的活化能接近60 kJ/mol。升温速率由0.1℃/min提高到100℃/min时，分解过程延长，最大质量损失率降低。粒径在250 ~ 250 mm范围内变化对热解无显著影响。利用热重分析-傅里叶变换红外（TGA-FTIR）光谱技术对棕榈油废弃物热解过程中的主要气态产物进行了鉴定，并对其实时演化特征进行了研究。这项基础研究提供了对棕榈油废弃物热解的基本认识，有助于我们目前开发一种利用棕榈油废弃物生产高产生物燃料的先进热工艺。
The purpose of this study is to determine the pyrolysis characteristics and gas product properties of palm oil wastes, to promote a general idea of converting the wastes to an energy source. The palm oil waste contains similar to50 wt % carbon, 7 wt % hydrogen, and a trace amount of ash. The low heat value (LHV) of these wastes is similar to20 MJ/kg. They are ideal energy sources for biofuel generation. Thermal analysis demonstrates that these wastes are easily decomposed, with most of their weight lost from 220 degreesC to 340 degreesC at slow heating rates. The pyrolysis process could be divided into four stages: moisture evaporation, hemicellulose decomposition, cellulose decomposition, and lignin degradation. The kinetic analysis showed that the reaction order for the pyrolysis of palm oil wastes and three model biomass components (hemicellulose, cellulose, and lignin) is 1. The activation energy of the palm oil wastes is similar to60 kJ/mol. The decomposition process is prolonged and the maximum mass loss rate is decreased when the heating rate is increased from 0.1 degreesC/min to 100 degreesC/min. Varying the particle size from 250 mum to > 2 mm has no significant influence on pyrolysis. The main gaseous products from the pyrolysis of palm oil waste are identified using thermogravimetric analysis-Fourier transform infrared (TGA-FTIR) spectroscopy, and, particularly, their real-time evolution characteristics are investigated. This fundamental study provides a basic insight of the palm oil waste pyrolysis, which can benefit our current work in developing an advanced thermal processes for high-yield biofuel production from palm oil waste.