（毕业设计论文）不同离子液体萃取体系下通过光催化氧化燃料油脱硫研究.doc

w w 摘 要 为了有效控制环境污染，世界各国对燃料油中的硫含量不断提出更严格的要求。光催化氧化-离子液体萃取耦合脱硫具有反应条件温和，工艺简单，脱硫效果好等特点，成为近年来有发展潜力的深度脱硫新方法。本文以铁酸镧及氧化铁作为光催化剂，分别考察了在不同离子液体萃取体系下通过光催化氧化燃料油脱硫情况。 分别用溶胶凝胶法、反相微乳液法合成了Ca2+和Nd3+离子掺杂的LaFeO3纳米粉体，首次用离子液体自燃烧法合成了LaFeO3及混晶氧化铁光催化剂。并利用XRD、TEM、FT-IR、UV-Vis DRS等测试技术对其进行了表征。通过光氧化脱硫实验对比，得出混晶氧化铁作为光催化剂进行光氧化脱硫效果最好，并探讨了其可见光催化氧化燃料油脱硫机理。 以季铵盐为阳离子、金属基氯化物如ZnCl2、FeCl3等为阴离子，合成不同结构的Lewis酸性季铵盐类离子液体，考察了离子液体的种类、阴阳离子比例、反应温度、反应时间等因素对萃取脱硫的影响，优选出盐酸三乙胺与氯化铁形成的离子液体作为萃取剂。 以混晶氧化铁为光催化剂、1.6Et3NHCl FeCl3离子液体为萃取剂，考察了离子液体萃取耦合可见光催化氧化技术脱除燃料油含硫化合物。在金卤灯的照射下，光催化剂加入量为0.05g，剂油比为1:2.5，空气通入量为500ml/min，反应时间为1h时，50ml硫含量为500ppm的模型油脱硫率可达92.3%。 关键词：离子液体；萃取；光催化氧化；脱硫 Abstract Because of serious air pollution, most countries have made laws or regulations to restrict the sulfur content in fuel oil with a more rigorous standard in rencent years. Among desulfurization techniques, photocatalytic oxidation coulped ionic liquids (ILs) extraction desulfurization technology, which has many advantages such as mild conditions, simple techniques, high desulfurization efficiency, shows promising as an approach for deep desulfurization. Applications of different ILs in photocatalysis oxidation desulfurization were investigated with LaFeO3 or iron oxide as photo catalysts,thiophene /dibenzothiophene (DBT) in n-octane as model oil. Sol-gel method and reverse microemulsion method were used to synthesized Ca2 + and Nd3 + doped nanopowders LaFeO3, the first time since the combustion method using ionic liquid and the mixed crystals were synthesized LaFeO3 iron oxide photocatalyst. Using XRD, TEM, FT-IR, UV-Vis DRS and other testing techniques to characterize them.By comparison photo-oxidation desulfurization, draw mixed crystal of iron oxide as a photocatalyst for the best photo-oxidation desulfurization and visible light catalytic oxidation of fuel oil desulfurization mechanism. Lewis?ionic?liquids?with?different?structure?were?synthesized?with?quaternary? ammonium?salts?as?positive?ions?and?metal?chlorides,?such?as?ZnCl2,FeCl3,?as?neg