AN APPROACH TO CALCULATION METHOD OF ACTIVATION ENERGY IN COMBUSTION TEST OF BLIND COAL

MAO Xiao-fei; LI Jiu-hua; CHEN Nian-zu Jiangxi Provincial Electric Power Science Research Institute

doi:10.19666/j.rlfd.2008.10.007

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AN APPROACH TO CALCULATION METHOD OF ACTIVATION ENERGY IN COMBUSTION TEST OF BLIND COAL

更新时间：2025-09-28

- AN APPROACH TO CALCULATION METHOD OF ACTIVATION ENERGY IN COMBUSTION TEST OF BLIND COAL
- Thermal Power Generation Issue 10, Pages: 23-27(2008)
- 作者机构：
  
  江西省电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.2008.10.007
  CLC： TQ534
- Published：2008
- 稿件说明：
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MAO Xiao-fei, LI Jiu-hua, CHEN Nian-zu Jiangxi Provincial Electric Power Science Research Institute. AN APPROACH TO CALCULATION METHOD OF ACTIVATION ENERGY IN COMBUSTION TEST OF BLIND COAL[J]. Thermal power generation, 2008, (10): 23-27.
DOI：

MAO Xiao-fei, LI Jiu-hua, CHEN Nian-zu Jiangxi Provincial Electric Power Science Research Institute. AN APPROACH TO CALCULATION METHOD OF ACTIVATION ENERGY IN COMBUSTION TEST OF BLIND COAL[J]. Thermal power generation, 2008, (10): 23-27. DOI： 10.19666/j.rlfd.2008.10.007.

摘要

采用单个扫描速率法中的Freeman-Carroll法(微分法)和Coats-Redfern法(积分法)对两种无烟煤燃烧反应的活化能进行了研究。结果表明:升温速率对活化能E值影响较大

随升温速率的提高

E值均呈现出减小的趋势;当升温速率较低时

Freeman-Carroll法用到DTG曲线上的数据

而Coats-Redfern法只用到TG曲线上的数据

从数据拟合的相关系数R来看

试验的误差因素(如DTG曲线的不平滑)对Freeman-Carroll法的计算结果影响更大;当升温速率较高时

测量的DTG曲线趋于平滑

试验的误差因素对Freeman-Carroll法的计算结果影响减小。此外

随升温速率的提高

(2RT)/E有增大的趋势

Coats-Redfern法中假设(2RT)/E远远小于1也不尽合理。

Abstract

By using Freeman-Carroll method (differential method)and Coats-Redfern method(integral method)in the individually scanning rate method

the activation energy in combustion reaction of blind coal in two kinds has been studied.Results show that the heating rate has greater effect on the E value of activation energy

the E value decreases along with the heating rate's increasing.In the event of lower heating rate

the Freeman-Carroll method uses data on DTG curve

while Coats-Redfern method only uses data on TG curve.From view point of relative coefficient R in data fitting

the error factor in test(i.e.the non-smooth part on DTG curve)has more greater effect on the activation energy calculated by Freeman-Carroll method;in case of higher heating rate

the measured DTG curve tends to be smooth

the influence of error factor R in test upon the calculated result by using Freeman-Carroll method decreases.In addition

along with increasing the heating rate

(2RT)/E tends to be increased

so the hypothesis of (2RT)/E1 in Coats-Redfern method isn't fully rational.

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