氧化吸附法脱除燃油中苯并噻吩类硫化物  

Desulfurization of dibenzothiophene in model fuels by oxidative adsorption method

作　　者：王胜强[1] 王瑞聪[2] 付轶[3] 苏伟[3] 孙艳[3] 于宏兵[1] 

机构地区：[1]南开大学环境科学与工程学院,天津300071 [2]天津大学理学院,天津300072 [3]天津大学化工学院,天津300072

出　　处：《化学工程》2011年第2期1-5,共5页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(21006053);中央高校基本科研业务费专项资金资助项目(65010551)

摘　　要：为深度脱除燃油中苯并噻吩类硫化物,采用质量分数69.8%浓硝酸作为催化剂和氧化剂,负载于硅胶吸附剂孔中制备成脱硫剂,在间歇反应器中,常温常压操作条件下处理质量分数1 000×10-64,6-二甲基二苯并噻吩(4,6-DMDBT)模型油。结果显示:脱硫剂在温度45℃,吸附剂与催化剂负载质量比1∶0.75,吸附剂与燃油质量比1∶30条件下,模型油中的4,6-二甲基二苯并噻吩硫化物90 min后被完全脱除。燃油中芳烃的存在对脱硫速率影响很小,而燃油中的饱和水分可导致脱硫速率快速下降。再生后脱硫剂的脱硫能力下降很小。由于脱硫反应发生在吸附剂的孔中,脱硫后油品的腐蚀性可以达到国家燃油质量标准。An oxidative desulfurization adsorbent composed of mass fraction 69.8% nitric acid over silica gel was used to deeply remove dibenzothiophene from model diesel fuels.In the batch reactor,the model fuel containing mass fraction 1 000×10-6 4,6-dimethyldibenzothiophene（4,6-DMDBT） was stirred with the oxidative adsorbent at mild temperature under atmospheric pressure.The results show that the sulfur-free fuels are obtained in 90 min at 45 ℃ when the mass ratio of adsorbent to catalyst and fuel equals to 1 ∶0.75 and 1 ∶30,respectively.The aromatic hydrocarbon hardly has effect on the desulfurization rate.However,the reaction rate decreases dramatically in the water saturated fuel.The desulfurization capacity of regenerated adsorbent is almost totally recovered.Because the desulfurization reaction occurs in the pores of the adsorbent,the model fuel after desulfurization can meet the national corrosion test in China.

关 键 词：深度脱硫 车用燃油 氧化吸附 4 6-二甲基二苯并噻吩 

分 类 号：TE624.5[石油与天然气工程—油气加工工程]