Insight into fast infrared-assisted and coal rank on pyrolysis kinetics and products distribution

IF 5.8 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-01-27 DOI:10.1016/j.jaap.2025.106986

Shuai Li , Yongfu Zeng , Rui Qu , Moshan Li , Youcai Ma , Xin Jia , Jianglong Yu , Zhaoming Xie , Changyuan Tao , Zuohua Liu , Erfeng Hu

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引用次数: 0

Abstract

An infrared rapid heating reactor was employed to investigate the effect of coal rank on pyrolysis product distribution and pyrolysis behavior among different coals. The dynamic analysis demonstrated that the average E_α decreased with the coal rank increased, with values of 438.89 kJ/mol for lignite (LGC), 388.83 kJ/mol for long flame coal (LFC), and 338.20 kJ/mol for lean coal (LNC). The tar yields of LGC, LFC and LNC increased initially and then decreased. Notably, the LGC yield reached the highest yield of 23.20 % at 700 °C, but LFC and LNC got the maximum yields at 600 °C with yields of 13.10 % and 5.10 %, respectively. GC-MS analysis revealed that hydrocarbon content in pyrolysis tar increased with coal rank. Specifically, LGC exhibited a hydrocarbon content of 39.13 %, LFC showed 48.44 %, and LNC reached 57.86 %. Different coals displayed distinct pyrolysis mechanisms, with LGC generating H₂ and CH₄ through the breaking of straight and branched aromatic hydrocarbons at low temperatures, whereas LNC produced these gases through the cracking and condensation of aromatic rings. Raman spectroscopy revealed that LGC exhibited a higher content of aromatic hydrocarbons in char compared to LFC and LNC.

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来源期刊

Journal of Analytical and Applied Pyrolysis 化学-分析化学

CiteScore

9.10

自引率

11.70%

发文量

340

审稿时长

44 days

期刊介绍： The Journal of Analytical and Applied Pyrolysis (JAAP) is devoted to the publication of papers dealing with innovative applications of pyrolysis processes, the characterization of products related to pyrolysis reactions, and investigations of reaction mechanism. To be considered by JAAP, a manuscript should present significant progress in these topics. The novelty must be satisfactorily argued in the cover letter. A manuscript with a cover letter to the editor not addressing the novelty is likely to be rejected without review.