柴油超深度加氢脱硫机理及氮化物影响的研究进展  

Study on mechanism of diesel ultra-deep hydrodesulfurization and impact of nitrogen compounds

作　　者：白天忠[1] 刘继华[2] 柳伟[2] 宋永一[2] 孙厚祥[1] 包洪洲[1] 

机构地区：[1]辽宁石油化工大学,辽宁省抚顺市113001 [2]中国石油化工股份有限公司抚顺石油化工研究院,辽宁省抚顺市113001

出　　处：《炼油技术与工程》2011年第8期1-4,共4页Petroleum Refinery Engineering

摘　　要：介绍了柴油超深度加氢脱硫(HDS)机理及氮化物对其的影响。介绍了硫化物存在形式、相对反应速率及其HDS反应路径。结果表明:非噻吩类硫化物HDS活性较高,在加氢催化剂活性中心上直接氢解生成相应的烃和H2S;催化剂的酸性在加氢精制工艺中对裂化反应有促进作用,必须考虑到脱硫率和催化剂寿命的最优化选择;碱性氮化物比非碱性氮化物对HDS的抑制作用强,不同催化剂的抗氮化物毒化能力不同,氮化物对HDS的两种路径影响不同,对加氢(HYD)路径的抑制作用强于直接氢解(DDS)路径;柴油馏分超深度HDS机理及氮化物对其抑制机理的研究,可以指导高活性、抗抑制剂催化剂的开发,从而缓和工艺条件,延长催化剂寿命。The mechanisms of diesel ultra-deep desulfurization and impact of nitrogen compounds are introduced.The forms of nitrogen compounds,the relative reaction rate and HDS reaction route are specifically studied.The results show that the non-thiophene sulfides have a higher HDS activity,which can directly be hydrogenolyzed into hydrocarbons and H2S on the active site of hydrogenation catalysts.As the acid site of catalyst has a promoting effect on cracking reaction in hydrogenation process,the desulfurization rate and service life of catalyst should be optimally considered.The basic nitrogen compounds have a greater inhibition on HDS than non-basic nitrogen compounds.Different catalysts have different contaminant resistance performances.The impacts of nitrogen compounds on two HDS routes are different,i.e.the inhibition on HYD is greater than on DDS.The study on the mechanism of diesel ultra-deep hydrodesulfurization and inhibition of nitrogen compounds provides a good guideline for development of high-activity high-inhibition-resistance catalysts which can mitigate process conditions and extend catalyst life.

关 键 词：机理 超深度脱硫 柴油 氮化物 

分 类 号：TE624.55[石油与天然气工程—油气加工工程]