四氟硼酸改性活性炭的制备及其吸附脱除二苯并噻吩性能  

Modification of activated carbon with tetrafluoroboric acid and its performance in adsorption desulfurization of dibenzothiophene

作　　者：王晓静[1] 刘超[2] 董悦[1] 李发堂[1] 赵君[1] 李玉佩[1] 

机构地区：[1]河北科技大学理学院,河北石家庄050018 [2]石家庄经济学院宝石与材料学院,河北石家庄050031

出　　处：《燃料化学学报》2015年第5期607-613,共7页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21406054;21376061);教育部新世纪优秀人才支持计划(NCET-12-0686);河北省自然科学基金(B2015208005;B2015208010)

摘　　要：采用浸渍法制备了四氟硼酸(HBF4)改性活性炭,并研究了其对模拟油中二苯并噻吩(DBT)的吸附脱除性能。利用傅里叶红外光谱(FT-IR)、差示热分析仪(TG-DTA)、X射线光电子能谱(XPS)以及N2吸附技术对吸附剂的表面态和孔结构进行了表征,考察了四氟硼酸浓度、热处理温度以及模拟油中DBT浓度对吸附脱硫效果的影响。结果表明,经质量分数0.5%的HBF4溶液浸渍、140℃热处理后,在剂油比1∶100条件下,活性炭的吸附容量为352 mg/g,较未改性活性炭提高了72.5%。The activated carbon adsorbent was modified with tetrafluoroboric acid ( HBF4 ) by impregnation and characterized by Fourier transform infrared spectroscopy ( FT-IR) , X-ray photoelectron spectroscopy ( XPS) and N2 physisorption. The performance of modified activated carbon in adsorption desulfurization of dibenzothiophene ( DBT ) in model diesel fuel was investigated and the influences of HBF4 concentration, calcination temperature and the initial DBT concentration on the sulfur removal efficiency were considered. The results show that the adsorbent modified with 0. 5% HBF4 solution and calcined at 140℃ performs best in DBT desulfurization; when the adsorbent/oil ratio is 1:100, the HBF4-modified adsorbent exhibits an adsorption capacity of 352 mg/g, which is 72. 5% higher than that of the unmodified activated carbon.

关 键 词：吸附脱硫 改性活性炭 四氟硼酸 二苯并噻吩 

分 类 号：TE624[石油与天然气工程—油气加工工程]