1-Ethyl-3-Methylimidazole Bromide 润湿煤电机理的实验研究

IF 0.8 4区 工程技术 Q4 CHEMISTRY, MULTIDISCIPLINARY
Manting Wu, Tao Ge, Chuanchuan Cai, Jingyao Xu, Yulu Wei, Qian Cheng
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引用次数: 0

摘要

探索新型功能化离子液体1-乙基-3-甲基溴化咪唑鎓([EMIM][Br])增强煤粉润湿性的最佳实验条件和机理,对降低煤粉危害具有重要意义。本研究通过紫外吸收光谱测定了[EMIM][Br]水溶液的临界胶束浓度,并利用接触角、扫描电子显微镜(SEM)、自动比表面积和孔隙率分析仪(BET)、傅立叶变换红外光谱(FTIR)等表征方法分析了[EMIM][Br]水溶液对煤粉润湿性的影响机理。结果表明,[EMIM][Br]水溶液的临界胶束浓度为 0.005 mol/L,最佳实验条件为反应温度为 40°C,浸泡时间为 8 小时,配比为 1 克兑 20 毫升。经[EMIM][Br]水溶液作用后,煤粉气孔层区发育,出现楔形气孔和片状充填裂隙,中孔数量增加。煤粉中 C-O、羧基(-COOH)、羟基醚氢键(OH...O)和羟基自固氢键(OH...OH)等亲水官能团的含量增加,芳基烃-CH3 和-CH2 等疏水官能团的含量减少,从而改善了煤粉的润湿性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Experimental Study of Mechanism of 1-Ethyl-3-Methylimidazole Bromide Wetting Coal Power

Experimental Study of Mechanism of 1-Ethyl-3-Methylimidazole Bromide Wetting Coal Power

Exploring the optimal experimental conditions and mechanism of a novel functionalized ionic liquid 1-ethyl-3-methylimidazolium bromide ([EMIM][Br]) for enhancing the wettability of coal powder is of great significance for reducing the harm of coal dust. This study determined the critical micelle concentration of [EMIM][Br] aqueous solution through ultraviolet(UV) absorption spectroscopy, and analyzed the mechanism of the influence of [EMIM][Br] aqueous solution on the wettability of coal using characterization methods such as contact angle, scanning electron microscope(SEM), automated surface area and porosity analyzer(BET), and fourier transform infrared spectroscopy(FTIR). The results showed that the critical micelle concentration of [EMIM][Br] aqueous solution was 0.005 mol/L, and the optimal experimental conditions were reaction temperature of 40°C, soaking time of 8 hours, and ratio of 1 g to 20 ml. After the action of [EMIM][Br] aqueous solution, the coal dust stomatal layer zone was developed, wedge-shaped stomata and sheet-filled cracks appeared, and the number of mesopores was increased. The content of hydrophilic functional groups such as C–O, carboxyl(–COOH), hydroxyl ether hydrogen bonds(OH…O), and hydroxyl self-consolidating hydrogen bonds(OH…OH) in the pulverized coal was increased, and the content of hydrophobic functional groups such as aryl hydrocarbons –CH3 and–CH2 was decreased, which improved the wettability of the pulverized coal.

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来源期刊
Solid Fuel Chemistry
Solid Fuel Chemistry CHEMISTRY, MULTIDISCIPLINARY-ENERGY & FUELS
CiteScore
1.10
自引率
28.60%
发文量
52
审稿时长
6-12 weeks
期刊介绍: The journal publishes theoretical and applied articles on the chemistry and physics of solid fuels and carbonaceous materials. It addresses the composition, structure, and properties of solid fuels. The aim of the published articles is to demonstrate how novel discoveries, developments, and theories may be used in improved analysis and design of new types of fuels, chemicals, and by-products. The journal is particularly concerned with technological aspects of various chemical conversion processes and includes papers related to geochemistry, petrology and systematization of fossil fuels, their beneficiation and preparation for processing, the processes themselves, and the ultimate recovery of the liquid or gaseous end products.
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