季铵盐型表面活性剂催化氧化柴油脱硫研究 - 石油与天然气化工.docVIP

季铵盐型表面活性剂催化氧化柴油脱硫研究 赵田红(1,2 张 燕2 夏吉佳2 1. 西南石油大学油气藏地质及开发工程国家重点实验室 2. 西南石油大学化学化工学院 摘要：在H2O2/醋酸氧化柴油体系中，采用季铵盐表面活性剂和季铵盐型Gemini表面活性剂作为相转移催化剂(PTC)，进行柴油的催化氧化脱硫研究。比较了不同碳链的季铵盐表面活性剂和季铵盐型Gemini表面活性剂的脱硫效果，考察了双子表面活性剂[C12H25-N+-(CH2)2-N+-C12H25]﹒2Br-（C12-2-C12·2Br-）的用量、氧化剂的用量、反应温度以及反应时间对脱硫效果的影响。结果表明：以C12-2-C12·2Br-作为相转移催化剂，w(PTC)/w(柴油)=0.25%，φ(氧化体系)/ φ(柴油) =0.2，反应温度70 ℃，反应时间1.5 h，柴油脱硫率最高可达84.76%，柴油收率为94.52%。 关键词：相转移催化剂 柴油 季铵盐 表面活性剂 Gemini 氧化脱硫 中图分类号：TE624.9 文献标志码：A Investigation ofdiesel fuel by quaternary ammonium gemini surfactant catalytic oxidation Zhao Tianhong1,2, Zhang Yan2，XiaJijia2 （1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University，Chengdu 610500, China） 2. School of Chemistry and Chemical Engineering of Southwest Petroleum University，Chengdu 610500, China） Abstract: In this paper, catalytic oxidation desulfurization of diesel fuel in the H2O2 oxidative desulfurization system by quaternary ammonium surfactants and quaternary ammonium gemini surfactants as phase transfer catalyst (PTC) was studied. The desulfurization effect of quaternary ammonium surfactants and quaternary ammonium gemini surfactants with different carbon chain was compared, furthermore,the effects of [C12H25-N+-(CH2)2-N+-C12H25]﹒2Br-dosage , the oxidant dosage, reaction temperature and reaction time on the desulfurization performance were investigated. It was shown that the desulfurization rate of diesel fuel up to 84.76% and the diesel yield amount to 94.52% under the conditions of m(PTC)/m(diesel fuel)=0.25% andV(oxidation system)/V(diesel fuel)=0.2 after 1.5 h in reaction at 70 ℃ with the phase transfer catalyst of [C12H25-N+-(CH2)2-N+-C12H25]﹒2Br-. Keywords: phase transfer catalyst, diesel fuel, quaternary ammonium salt, surfactant, Gemini, oxidative desulphurization 汽油、柴油等燃料油中的含硫化合物燃烧后生成的SOx是几种主要的大气污染物之一，也是造成酸雨的直接原因，对生态系统、农业、森林、水产资源以及人体健康都会造成严重危害，还会腐蚀发动机的燃烧室和排气系统，降低发动机寿命，增加燃料消耗[1]。因此，世界各国相继颁布了日趋严格的燃料油含硫标准[2]，我国也在逐步实行含硫化合物质量分数低于50 μg/g的