交流电场对生物柴油相和甘油相分离的影响

doi:10.3969/j.issn.1671-7775.2022.04.008

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摘要采用高压交流电场促进大豆油-甲醇酯交换产物生物柴油和甘油的分离，探究了不同电场强度、醇油物质的量比、催化剂对甘油液滴沉降速率的影响，并对不同酯交换条件下制得的生物柴油和副产物甘油进行物性测量.研究表明：高压交流电场可以有效提高生物柴油和甘油的分离效率，GC-MS检测结果显示高强电场不会对生物柴油品质产生影响；在螺旋形电极形式下的电场中，电场强度E′=175 V·mm^-1时甘油的聚结效率达到最大；不同的醇油物质的量比会造成副产物甘油物性的差异，但其对甘油液滴的沉降速率影响不大；碱性催化剂含量的增加会加快甘油的沉降，氢氧化钾作用下甘油的沉降效率较高.

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	王军锋
	陆帅全
	范志恒
	王东保

关键词 ：生物柴油, 酯交换, 高强电场, 甘油, 聚结, 分离, 沉降

Abstract：The high-voltage AC electric field was used to promote the separation of soybean oil-methanol transesterification product biodiesel and glycerin. The effects of electric field strength, alcohol-to-oil molar ratio and catalyst on the sedimentation rate of glycerin droplets were explored, and the physical properties of biodiesel and byproduct glycerin prepared under different transesterification conditions were measured. The results show that the high-voltage AC electric field can effectively improve the separation efficiency of biodiesel and glycerin. GC-MS test results show that high-strength electric fields has no effect on the quality of biodiesel. In the electric field formed by spiral electrode, the coalescence efficiency of glycerin reaches the maximum when the electric field strength of E′ is 175 V·mm^-1. Different molar ratios of alcohol and oil can cause differences in the physical properties of the by-product glycerin and have little effect on the sedimentation rate of glycerin droplets. The increase of alkaline catalyst content can promote the sedimentation of glycerin, and the sedimentation efficiency of glycerin under the action of potassium hydroxide is increased.

Key words： biodiesel transesterification high intensity electric field glycerin coalescence separation sedimentation

基金资助:国家自然科学基金资助项目( 51761145011)

作者简介: 王军锋（1975—），男，山东烟台人，教授，博士生导师（wangjunfeng@ujs.edu.cn），主要从事荷电多相流理论与应用研究. 陆帅全（1996—），男，江苏南通人，硕士研究生（465163307@qq.com），主要从事生物燃料与荷电多相流研究.

引用本文:

王军锋，陆帅全，范志恒，王东保. 交流电场对生物柴油相和甘油相分离的影响[J]. 江苏大学学报（自然科学版）, 2022, 43(4): 424-430. WANG Junfeng， LU Shuaiquan， FAN Zhiheng, WANG Dongbao . Effect of AC electric field on separation of biodiesel and glycerin[J]. Journal of Jiangsu University(Natural Science Eidtion) , 2022, 43(4): 424-430.

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http://zzs.ujs.edu.cn/xbzkb/CN/10.3969/j.issn.1671-7775.2022.04.008 或 http://zzs.ujs.edu.cn/xbzkb/CN/Y2022/V43/I4/424

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