通过实验和计算研究阴离子表面活性剂 AES 对褐煤的热危害
IF 5.3
2区 化学
Q2 CHEMISTRY, PHYSICAL
引用次数: 0
摘要
喷雾降尘是煤矿常用的一种降尘方法，已被广泛采用。然而，煤尘经抑尘剂润湿后的热稳定性仍是未知数。这项工作旨在研究块状煤尘经表面活性剂润湿后，在风干过程中裂解产生的二次粉尘弥散对环境造成的潜在危害。实验样品为褐煤和 AES。使用热力学方程分析、计算和比较 AES 溶液润湿前后褐煤平均表观活化能的变化。与 AES 溶液润湿前的褐煤相比，润湿后褐煤的燃烧特性指数降低了 1.93%，而在 AES 溶液润湿前后，用反应动力学方法计算的褐煤平均表观活化能分别降低了 7.6%、6.7% 和 17.1%。傅立叶变换红外分析表明，AES 溶液润湿后褐煤中脂肪烃的比例比润湿前有所下降，含氧官能团的比例呈上升趋势。该研究阐明了二次粉尘弥散造成危害的复杂微观机理，为预防和控制煤尘爆炸事故提供了新的科学依据。本文章由计算机程序翻译，如有差异，请以英文原文为准。
Study on the thermal hazards of anionic surfactant AES on lignite via experiments and calculations
Spray dust reduction is a commonly used dust reduction method in coal mines and has been widely adopted. However, the thermal stability of coal dust after being wetted by dust suppressants remains unknown. The work aimed to investigate the potential environmental hazards posed by the secondary dust dispersion resulting from the cracking of lump coal dust after being wetted by surfactants and subsequently air-dried. Lignite and AES were used as experimental samples. Use thermodynamic equations to analyze, calculate, and compare the changes in the average apparent activation energy of lignite before and after AES solution wetting. Compared with lignite before AES solution wetting, the combustion characteristic index of lignite decreased by 1.93 % after wetting, and before and after AES solution wetting, the average apparent activation energy of lignite calculated by reaction kinetics methods decreased by 7.6 %, 6.7 %, and 17.1 % respectively. FTIR analysis shows the proportion of aliphatic hydrocarbons in lignite after AES solution wetting has decreased compared with before wetting, and the proportion of oxygen-containing functional groups has shown an upward trend. The work elucidated the complex microscopic mechanisms underlying hazards caused by secondary dust dispersion, providing new scientific evidence for preventing and controlling coal dust explosion accidents.
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来源期刊
Journal of Molecular Liquids
化学-物理：原子、分子和化学物理
CiteScore
10.30
自引率
16.70%
发文量
2597
审稿时长
78 days
期刊介绍：
The journal includes papers in the following areas:
– Simple organic liquids and mixtures
– Ionic liquids
– Surfactant solutions (including micelles and vesicles) and liquid interfaces
– Colloidal solutions and nanoparticles
– Thermotropic and lyotropic liquid crystals
– Ferrofluids
– Water, aqueous solutions and other hydrogen-bonded liquids
– Lubricants, polymer solutions and melts
– Molten metals and salts
– Phase transitions and critical phenomena in liquids and confined fluids
– Self assembly in complex liquids.– Biomolecules in solution
The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include:
– Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.)
– Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.)
– Light scattering (Rayleigh, Brillouin, PCS, etc.)
– Dielectric relaxation
– X-ray and neutron scattering and diffraction.
Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.
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