果壳生物质热解特性与动力学

doi:10.3969/j.issn.1673-5854.2018.06.002

Abstract

Abstract: Pyrolysis properties of forest shells biomass(macadamia nut shell, camellia tea shell and walnut shell) were studied by TG-DTG, and the kinetics were analyzed by distributed activation energy model(DAEM). Pyrolysis characteristics showed that the maximum weight loss rate of camellia tea shell was the minimum. Initial temperature, pyrolysis temperature and the end of the temperature for maximum weight loss rate were lower than those of macadamia nut shell and walnut shell. Pyrolysis characteristic values of macadamia nut shell and walnut shell were approximate, and pyrolysis process transferred from low temperature zone to high temperature zone with increasing the heating rate for three kinds of shell biomass. DAEM were suitable for studying the kinetics of pyrolysis of three kinds of shell biomass, and the correlation coefficients(R²) were 0.914-0.999. The activation energies of macadamia nut shell, camellia tea shell and walnut shell were 83.91-211.86 kJ/mol, 68.64-244.49 kJ/mol and 98.69- 267.75 kJ/mol, respectively. With the increase of conversion rate, the activation energies of three kinds of shell biomass showed the same change trend, but the range of change was different.

Key words: shell biomass, pyrolysis characteristic, kinetic, distribute activation energy model, activation energy

CLC Number:

TQ35

FAN Fangyu, HUANG Yuanbo, YANG Xiaoqin, ZHENG Yunwu, LIU Can, WANG Zhen, ZHENG Zhifeng. Pyrolysis Characteristics and Kinetics of Shells Biomass[J]. bce, 2018, 52(6): 8-14.

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Pyrolysis Characteristics and Kinetics of Shells Biomass

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