Research on co-combustion characteristics and kinetics of green bamboo charcoal and anthracite

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), May.2025, Vol.48 No.5: 606-613

DOI: 10.3969/j.issn.1003-5060.2025.05.005

Authors

ZHANG Yimin $ ^{1} $, XING Xianjun $ ^{2} $

(1. School of Automobile and Traffic Engineering, Hefei University of Technology, Hefei 230009, China; 2. Institute of Environment, Hefei Comprehensive National Science Center, Hefei 230051, China)

Abstract and Keywords

Abstract: The aim of this study is to reveal the co-combustion reaction mechanism of green bamboo charcoal and anthracite, and to clarify the main factors affecting the co-combustion reaction of the mixture. At the same time, it also provides a theoretical basis for revealing the optimal ratio of biomass pyrolytic carbon in mixed fuel and the application of biomass pyrolytic carbon in power plant boilers. The non-isothermal thermogravimetric (TG) analysis method was used to study green bamboo charcoal and anthracite. The results show that biomass has good combustion performance due to carbonization, which significantly reduces volatile matter and significantly increases fixed carbon, while the combustion performance of anthracite is relatively poor. The addition of biochar can improve the combustion performance of anthracite. Due to the different volatile content and carbonization degree of the mixture, there is obvious synergistic effect in the co-combustion process. Kissinger-Akahira-Sunose (KAS) and Flynn-Wall-Ozawa (FWO) methods were used to fit the combustion reaction of the mixture, and the fitting effect of FWO equation was better than that of KAS equation. FWO kinetic fitting results showed that when the mass ratio of green bamboo charcoal to anthracite was 5:5, the carbonization temperature was 460 °C, the activation energy reached its minimum value of 25.39 kJ/mol. The research on the co-combustion of biomass pyrolytic carbon and anthracite is of great significance to the industrial application of biomass resources.

Keywords: green bamboo; green bamboo charcoal; anthracite; combustion characteristics; dynamics

作者信息

张益民 $ ^{1} $，邢献军 $ ^{2} $

(1. 合肥工业大学汽车与交通工程学院，安徽合肥 230009；2. 合肥综合性国家科学中心环境研究院，安徽合肥 230051)

摘要和关键词

摘要: 为揭示青竹炭和无烟煤的共燃反应机理,阐明影响混合物共燃反应的主要因素,同时也为确定混合燃料中生物质热解炭的最佳配比以及生物质热解炭在电厂锅炉的应用提供理论依据,文章采用非等温热重分析方法,对青竹炭和无烟煤进行系统研究。结果表明:生物质由于炭化,使得挥发分显著减少、固定碳明显增加而具有较好的燃烧性能,而无烟煤的燃烧性能相对较差;生物质炭的加入可以改善无烟煤的燃烧性能。由于混合物的挥发分质量分数和炭化程度不同,共燃过程中存在明显的协同作用;通过KAS(Kissinger-Akahira-Sunose)法和FWO(Flynn-Wall-Ozawa)法对混合物的燃烧反应进行了动力学拟合,但FWO方程的拟合效果优于KAS方程。FWO动力学拟合结果表明,青竹炭与无烟煤按质量比5:5混合,炭化温度为460℃,活化能最小,为25.39 kJ/mol。该生物质热解炭和无烟煤的共燃研究对形成生物质资源的工业应用具有重要意义。

关键词: 青竹；青竹炭；无烟煤；燃烧特性；动力学

Funding

安徽省科技重大专项资助项目（2021e03020003）

合肥工业大学学报(自然科学版)

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