基于TG-FT-IR的关中麦秆热解特性及动力学研究

Abstract

Abstract: The pyrolysis behavior, characteristics and kinetics of Guanzhong wheat straw were investigated with a TG-FT-IR system at heating rates of 5, 10 and 20℃/min from ambient temperature to 1000℃. The results showed that the pyrolysis process of Guanzhong wheat straw could be divided into 4 stages:dehydration(room temperature-150℃), the pyrolysis processes of hemicellulose(150-300℃), cellulose(300-380℃) and lignin(380-1000℃). The main pyrolysis products at maximum pyrolysis rate under heating rate of 20℃/min identified by FT-IR included H₂O, CH₄, CO₂ and CO as well as aromatics, acids, alcohols, alkanes, phenols, ethers, ketones and aldehydes. The apparent activation energies determined by using model-free methods of FWO and KAS were determined with the appaoximate average value of 202 kJ/mol at conversion rates of 0.1-0.8. The activation energy estimated by the Kissinger method was 171.12 kJ/mol and lower than those obtained by FWO and KAS method.

Key words: Guanzhong wheat straw, pyrolysis, TG-FT-IR, kinetics, apparent activation energy

CLC Number:

TQ35
TK6

HU Bing-tao, LI Zhi-jian. Pyrolysis Characteristics and Kinetics of Guanzhong Wheat Straw Using TG-FT-IR[J]. bce, 2016, 50(2): 6-12.

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Pyrolysis Characteristics and Kinetics of Guanzhong Wheat Straw Using TG-FT-IR

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