氧化锌催化地沟油预酯化反应性能
Effect of Zinc Oxide Catalyzes Pre-esterification of Gutter Oil
易志刚 1许行健 1祖柱 1尹常凯 1赵庆松2
作者信息
- 1. 湖南仁和环境股份有限公司,湖南长沙 410005
- 2. 湖南仁和环保科技有限公司,湖南长沙 410005
- 折叠
摘要
地沟油是一种可再生资源,是合成生物柴油的重要前驱体,但过高的酸价往往降低其作为炼制生物柴油原材料的品质.预酯化反应能有效降低地沟油的酸价,避免其对生物柴油合成设备的腐蚀,并提高生物柴油的合成效率.探究了氢氧化钠、氢氧化钙、无水碳酸钾、氧化锌、碱式碳酸锆、HND-6 4固体碱6种碱性催化剂对地沟油酯化反应效果的影响,通过酸价测试发现,氧化锌催化地沟油酯化反应效果最佳,在最佳使用剂量0.4％,反应温度180 ℃时,氧化锌可将地沟油酸价从73.39 mgKOH/g降至8.95 mgKOH/g;同时氧化锌催化剂强化酯化反应,降低地沟油中的硫含量,使其硫含量下降23.4％.研究结果可为提高地沟油品质提供理论依据.
Abstract
Gutter oil is a kind of renewable resources and an important precursor of biodiesel synthesis,but the higher acid value of gutter oil decreases its performance upon biodiesel synthesis.The pre-esterification can effec-tively reduce the acid value of gutter oil,avoid the corrosion of biodiesel synthesis equipment,and improve the efficiency of biodiesel synthesis.In this work,sodium hydroxide,calcium hydroxide,anhydrous potassium car-bonate,zinc oxide,basic zirconium carbonate and HND-64 solid base as catalyst,were investigated to affect the esterification efficiency of gutter oil.From the result of acid value,it was found that the optimal catalyst for ester-ification of gutter oil was zinc oxide.When at the dosage of 0.4％and reaction temperature of 180 ℃,the acid value of gutter oil decreased from 73.39 mgKOH/g to 8.95 mgKOH/g.Meanwhile,addition of ZnO catalyst was enhanced esterification reaction,reducing the sulfur content by 23.4％in gutter oil.This study provides theoretical support for improving the quality of gutter oil.
关键词
地沟油/预酯化/生物柴油/催化剂/氧化锌Key words
gutter oil/esterification/biodiesel/catalyst/ZnO引用本文复制引用
出版年
2024
NETL
NSTL
万方数据