Study on the inhibition of coal oxidation characteristics and thermal effect of Luteolin/Tea polyphenols/Urea

IF 6.7 1区工程技术 Q2 ENERGY & FUELS

Fuel Pub Date : 2024-11-25 DOI:10.1016/j.fuel.2024.133618

Rongkun Pan , Hedi Shen , Pengyu Wang , Hailin Jia , Jiangkun Chao

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引用次数: 0

Abstract

In this study, to address the problems of the weak inhibition effect and short action time of a single inhibitor on coal oxidation, a novel composite inhibitor of Luteolin/Tea polyphenol/Urea (LTU) was proposed. The inhibition effects and mechanisms of LTU and other traditional inhibitors (NaHCO₃ and VC) on coal sample oxidation were compared and analyzed using a C600 high-precision calorimeter, a temperature-programmed oxidation device and Fourier transform infrared spectroscopy. The experimental results showed that LTU had an obvious synergistic effect on the inhibition of coal spontaneous combustion (CSC): 1) LTU could increase the initial exothermic temperature point, prolong the endothermic stage, and reduce the exothermic intensity of coal-oxygen reaction; 2) The coal sample treated with LTU showed a significant decrease in the concentration of carbon oxygen and alkane gases released, and an increase in the gas production temperature point, which was better than the inhibition effect of NaHCO₃ and VC under the same conditions. 3) The physical components of LTU could encapsulate the coal, insulate the oxygen, absorb heat and decrease the temperature; moreover, its chemical components could consume (–OH), (RO-), (ROO-) in the chain reaction, inert the free radicals in the chain reaction, inhibit oxidization and block CSC. This study provides an efficient and economical chemical inhibitor for safe production in the coal industry and important theoretical support for a deeper understanding of the CSC inhibition mechanism.

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木犀草素/茶多酚/尿素抑制煤氧化特性及热效应研究

针对单一抑制剂对煤氧化的抑制作用弱、作用时间短等问题，本研究提出了一种新型的木犀草素/茶多酚/尿素复合抑制剂（LTU）。利用 C600 高精度量热仪、温度编程氧化仪和傅立叶变换红外光谱仪，比较分析了 LTU 和其他传统抑制剂（NaHCO3 和 VC）对煤样氧化的抑制效果和机理。实验结果表明，LTU 在抑制煤炭自燃（CSC）方面具有明显的协同效应：1）LTU 可提高初始放热温度点，延长内热阶段，降低煤-氧反应的放热强度；2）经 LTU 处理的煤样释放的碳氧和烷烃气体浓度显著降低，产气温度点升高，优于相同条件下 NaHCO3 和 VC 的抑制效果。3）LTU 的物理成分可以包裹煤炭，隔绝氧气，吸热降温；其化学成分可以消耗链反应中的（-OH）、（RO-）、（ROO-），惰化链反应中的自由基，抑制氧化，阻断 CSC。该研究为煤炭工业的安全生产提供了一种高效、经济的化学抑制剂，也为深入理解 CSC 抑制机理提供了重要的理论支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fuel 工程技术-工程：化工

CiteScore

12.80

自引率

20.30%

发文量

3506

审稿时长

64 days

期刊介绍： The exploration of energy sources remains a critical matter of study. For the past nine decades, fuel has consistently held the forefront in primary research efforts within the field of energy science. This area of investigation encompasses a wide range of subjects, with a particular emphasis on emerging concerns like environmental factors and pollution.