Experimental characterization of self-heating behavior of charcoal from eucalyptus wood

被引：11

作者：

Bustos-Vanegas, Jaime Daniel ^{[1
]}

Martins, Marcio Aredes ^{[1
]}

Freitas, Arthur Gomes ^{[1
]}

Mellmann, Jochen ^{[2
]}

机构：

[1] Univ Fed Vicosa, BR-36570900 Vicosa, MG, Brazil

[2] Leibniz Inst Agrartech & Biookon eV ATB, D-14469 Potsdam, Germany

来源：

FUEL | 2019年 / 244卷

关键词：

Biomass; Oxidation; Kinetic; Activation energy; Pyrolysis; COAL; ENERGY; TEMPERATURES; ACTIVATION; OXIDATION;

D O I：

10.1016/j.fuel.2019.01.136

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The long cooling time of charcoal produced from eucalyptus pyrolysis is due in part to the heat generation in oxidation reactions at low temperatures. The intensity of this reactions depends on complex interactions between the interstitial gas and the solid matrix. The objective of this paper was to investigate the kinetics of the self-heating phenomena due to charcoal oxidation at low temperatures and at different oxygen concentrations. Samples of 230 g of charcoal were subjected to heating in a steel reactor at constant temperature, from 100 to 300 degrees C, and oxygen concentrations ranging from 20.9 to 10%. Was evidenced that the rate of oxygen consumption increases with charcoal temperature at rates that depend on the initial concentration of O-2. The beginning of the oxidation reactions was observed at 67 degrees C in atmospheres with 20.9% O-2. The overall activation energy for the self-heating phenomenon was 17,790 J mol(-1) and its intensity was increased with the temperature and O-2 concentration.

引用

页码：412 / 418

页数：7

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