磷钨酸功能化氮化碳的制备及其氧化脱硫研究  

Prepartion of phosphotungstic acid functionalized carbon nitride and its catalytic performance in oxidative desulfurization of model oil

作　　者：李秀萍[1] 赵荣祥[2] 苏建勋[2] 艾东[2] 

机构地区：[1]辽宁石油化工大学化学化工与环境学部化学与材料科学学院,辽宁抚顺113001 [2]辽宁石油化工大学化学化工与环境学部石油化工学院,辽宁抚顺113001

出　　处：《燃料化学学报》2015年第7期870-875,共6页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(51276078);国家重点基础研究发展规划(973计划;2011CB707301)

摘　　要：以磷钨酸和氮化碳为原料,合成磷钨酸功能化的氮化碳(g-C3N4/HPW),并采用XRD、SEM、FT-IR对其结构进行表征。以g-C3N4/HPW为催化剂,过氧化氢作为氧化剂,咪唑氟硼酸盐为萃取剂氧化萃取一体法脱除模拟油中的二苯并噻吩(DBT)。考察了反应温度、催化剂加入量、双氧水加入量、萃取剂加入量、硫化物类型等因素对脱硫效果的影响。结果表明,在模拟油为5 m L,g-C3N4/HPW为0.02 g,H2O2加入量为1.0 m L,[HMIM]BF4为1.5 m L,反应温度70℃,反应120 min的条件下,DBT的转化率可达到93%。反应体系循环使用4次催化剂的活性没有明显的降低。A new phosphotungstic acid functionalized carbon nitride （g-C3N4/HPW） was prepared with carbon nitride and phosphotungstic acid as raw materials. The structure of g-C3Na/HPW was characterized by XRD, FT-IR and SEM; with g-C3N4/HPW as a catalyst, the oxidative desulfurization of model oil containing dibenzothiophene （DBT） was carried out by using hydrogen peroxide as oxidant and imidazolium tetrafluoroborate ionic liquid as extractant. The influences of reaction temperature, catalyst amount, extractant amount, H2O2 amount, type of thiophene on the desulfurization efficiency were investigated. The results indicate that under the optimal reaction conditions, viz. , 5 mL model oil, 0.02 g g-C3N4/HPW, 1.0 mL H2O2, 1.5 mL [ HMIM] BF4, 70 ℃ and reaction time of 120 min, the desulfurization efficiency reaches 93%. Moreover, there is no significant decrease in the desulfurization activity after the catalyst system was recycled for 4 cycles.

关 键 词：g-C3N4 磷钨酸 二苯并噻吩 脱硫 

分 类 号：TE624[石油与天然气工程—油气加工工程]