J. Hefei Univ. Tech. (Nat. Sci.)

合肥工业大学学报(自然科学版)

JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY (NATURAL SCIENCE)

Competent Authorities: Ministry of Education of the People's Republic of China

Sponsor by: Hefei University of Technology

ISSN 1000-1646, CN 34-1001/N

Combustion characteristics and kinetics of co-carbonized products of Baizhu and bituminous coal

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白竹与烟煤共炭化产物燃烧特性与动力学研究

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), May.2023, Vol.46 No.5: 590-598

DOI: 10.3969/j.issn.1003-5060.2023.05.003

Authors

LIU Erdong $ ^{1,2} $, XING Xianjun $ ^{1,2} $, JIANG Qian $ ^{2,3} $, CHANG Zhuxia $ ^{4} $

(1. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China; 2. Advanced Energy Technology and Equipment Research Institute, Hefei University of Technology, Hefei 230009, China; 3. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China; 4. Anhui Blue Sky Energy and Environmental Protection Technology Co., Ltd., Hefei 231606, China)

Abstract and Keywords

Abstract: In this paper, Baizhu and bituminous coal were taken as raw materials, and co-carbonized products were prepared at different co-carbonization temperatures and different blending ratios. Thermogravimetric analysis (TGA) was used to study the combustion characteristics of the products at different heating rates, and the Kissinger-Akahira-Sunose (KAS) method and Flynn-Wall-Ozawa (FWO) method were used for kinetics calculation. The results showed that there was only one peak in the combustion process of co-carbonized products, which was basically consistent with the combustion of coal alone, but the comprehensive combustion characteristics were better than those of coal. With the increase of co-carbonization temperature (350-550 °C), the ash content increased and the combustion effect decreased. With the increase of heating rate, the derivative thermogravimetric (DTG) curve of the sample shifted to the high temperature zone, but the weight loss of the sample remained unchanged. With the increase of blending ratio of Baizhu, the weight loss of co-carbonized products decreased, and the ignition and combustion performance gradually improved. The co-carbonized products of Baizhu and coal had synergistic effect when burning. The activation energy results of FWO

Keywords: Baizhu; bituminous coal; co-carbonization; combustion characteristics; kinetics

作者信息

刘二东 $ ^{1,2} $，邢献军 $ ^{1,2} $，江谦 $ ^{2,3} $，常珠侠 $ ^{4} $

（1. 合肥工业大学机械工程学院，安徽合肥 230009；2. 合肥工业大学先进能源技术与装备研究院，安徽合肥 230009；3. 合肥工业大学资源与环境工程学院，安徽合肥 230009；4. 安徽省蓝天能源环保科技有限公司，安徽合肥 231606）

摘要和关键词

摘要: 文章以白竹和烟煤为原料, 在不同共炭化温度、不同掺混比条件下制备共炭化产物, 采用热重分析法研究产物在不同升温速率条件下的燃烧特性, 并采用 Kissinger-Akahira-Sunose(KAS) 法和 Flynn-Wall-Oza-wa(FWO) 法计算动力学。结果表明, 共炭化产物在燃烧过程中只出现 1 个峰, 与煤单独燃烧基本一致, 但综合燃烧特性优于煤; 随着共炭化温度升高 (350~550 ℃), 灰分增多, 燃烧效果下降; 随着升温速率提高, 样品微商热重 (derivative thermogravimetric, DTG) 曲线向高温段偏移, 但样品的失重量不变; 随着白竹掺混比增加, 共炭化产物燃烧的失重量随之减少, 着火、燃烧性能逐渐提升; 白竹与煤共炭化产物燃烧时会出现协同效应; 采用 FWO 法、KAS 法活化能结果相近, FWO 法模型较优, 其线性相关系数高于 0.95; 白竹与烟煤按质量比 7:3 掺混, 在 350 ℃ 条件下共炭化, 升温速率为 20 ℃/min 时共炭化产物综合燃烧特性指数最好 (3.98×10^{-7} min^{-2}·℃^{-3}), 最小着火能量最低 (85.85 kJ/mol)。

关键词: 白竹；烟煤；共炭化；燃烧特性；动力学

Funding

合肥市关键技术重大研发类资助项目（J2019G22）；合肥市借转补对外合作资助项目（J2018D02）

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