生物质表面活性剂对低阶煤脱水性能影响及作用机理研究  被引量:2

Effect of biomass surfactant on dehydration performance of low-rank coal and its mechanism

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作  者:刘明普 林梦宇 胡善沛 由晓芳[1] 李琳[1] LIU Mingpu;LIN Mengyu;HU Shanpei;YOU Xiaofang;LI Lin(College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China)

机构地区:[1]山东科技大学化学与生物工程学院,山东青岛266590

出  处:《山东科技大学学报(自然科学版)》2021年第4期28-37,共10页Journal of Shandong University of Science and Technology(Natural Science)

基  金:国家自然科学基金项目(51904174,52074175);山东省高等学校青创科技支持计划项目(2020KJD001);中国博士后科学基金项目(2019M662403)。

摘  要:研究了环境友好的生物质表面活性剂——腰果酚聚氧乙烯醚9(cashew phenol polyoxyethylene ether 9,BGF-9)对低阶煤脱水性能的影响,并对其作用机理进行探讨。在低阶煤泥脱水过程中加入BGF-9,单位吸附量为4.934 mg/g时;与直接脱水相比,煤泥含水率降低13.57%。吸附研究发现,BGF-9在低阶煤泥表面的吸附过程符合Langmuir吸附模型,氢键是其主要驱动力,符合准二级动力学方程,受颗粒内扩散与液膜扩散联合作用。润湿性研究表明,吸附后煤-水体系黏附功降低、稳定性下降,有利于低阶煤脱水。傅里叶变换红外光谱和X射线光电子能谱分析表明,BGF-9通过吸附覆盖了低阶煤表面的含氧官能团及部分石英为主的无机矿物,提高了疏水性,从而有利于提高低阶煤的脱水性能。In this paper,the effect of cashew phenol polyoxyethylene ether 9(BGF-9),an environmentally friendly biomass surfactant,on the dehydration performance of low-rank coal and its mechanism of action were studied.BGF-9 was added in the dehydration process of low-rank slime.Compared with direct dehydration,the slime moisture content decreased by 13.57%when the unit adsorption capacity was 4.934 mg/g.Adsorption studies have found that the adsorption process of BGF-9 on the low-rank slime surface conforms to the Langmuir adsorption model and hydrogen bond is the main driving force,and that the adsorption kinetic process conforms to the quasi-second-order kinetic equation and is subject to the joint action of intracellular diffusion and liquid film diffusion.The wettability study shows that the adhesion and stability of coal-water system decrease after adsorption,which is beneficial to the dehydration of low-rank coal.Fourier transform infrared(FTIR)and X-ray photoelectron spectroscopy(XPS)analyses show that by absorbing the inorganic minerals mainly containing oxygen functional groups and part of gangue quartz on the surface of low-rank coal,BGF-9 improves the hydrophobicity and thus the dehydration performance of low-rank coal.

关 键 词:腰果酚聚氧乙烯醚 低阶煤 吸附 含水率 润湿性 

分 类 号:TD926[矿业工程—选矿]

 

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