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实验与预期:无烟煤与生物质焦的共燃烧行为。

Experiment and expectation: Co-combustion behavior of anthracite and biomass char.

机构信息

College of Resources and Environmental Science, Chongqing University, Chongqing 400044, China.

College of Resources and Environmental Science, Chongqing University, Chongqing 400044, China; College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.

出版信息

Bioresour Technol. 2019 May;280:412-420. doi: 10.1016/j.biortech.2019.02.055. Epub 2019 Feb 15.

Abstract

The combustion behavior of anthracite, biomass (Ficus virens) char and their blends were investigated by thermogravimetry analysis (TGA). The combustion process mainly focused on the volatile combustion and char combustion. The addition of char reduced the initial temperature and final temperature of fuels. The interactions firstly inhibited and then facilitated. When the blending ratio was 70AN30FV, the antagonism was the minimum, and synergism was the strongest at 830 K for the random ratio. The kinetic models of Coats-Redfern (CR), Doyle equation (Doyle), Friedman (FR), Kissinger-Akahira-Sunose (KAS), Flynn-Wall-Ozawa (FWO) and distributed activation energy model (DAEM) were used to calculate the kinetic parameters. The average values of activation energy for CR and Doyle were close and that of KAS, FWO and DAEM were near. Based on these six models, the corresponding expectation equations of activation energy and pre-exponential factor were proposed and the best predicted results was CR model for 60AN40FV.

摘要

采用热重分析(TGA)研究了无烟煤、生物质(榕属)焦及其混合物的燃烧行为。燃烧过程主要集中在挥发分燃烧和焦燃烧上。焦的添加降低了燃料的起始温度和终了温度。相互作用最初抑制,然后促进。当混合比为 70AN30FV 时,对于随机比,在 830K 时,拮抗作用最小,协同作用最强。采用 Coats-Redfern(CR)、Doyle 方程(Doyle)、Friedman(FR)、Kissinger-Akahira-Sunose(KAS)、Flynn-Wall-Ozawa(FWO)和分布活化能模型(DAEM)动力学模型计算动力学参数。CR 和 Doyle 的平均活化能值相近,而 KAS、FWO 和 DAEM 的活化能值相近。基于这六个模型,提出了相应的活化能和指前因子的预期方程,对于 60AN40FV,CR 模型的预测结果最好。

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