摘要
以L-丙氨酸和磷钨酸为原料,合成氨基酸功能化磷钨杂多酸盐([Ala]3PW),并采用XRD、FT-IR对其结构进行表征。以[Ala]3PW为催化剂,过氧化氢作为氧化剂,甲基咪唑四氟硼酸盐([HMIM]BF4)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、O/S物质的量比、萃取剂加入量、硫化物类型等因素对脱硫效率的影响。结果表明,在模拟油为10mL、[Ala]3PW=0.04g、O和S的物质的量比为6、V([HMIM]BF4)/V(oil)=0.6、反应温度50℃、反应时间180min的条件下,DBT的转化率可达到98.2%。催化剂循环使用4次活性没有明显的降低。
A new amino-acid functionalized heteropoly tungstate （ [ Ala ] 3 PW） was prepared with alanine and phosphotungstic acid as raw materials. The structure of [ Ala]3PW was characterized by XRD, FF-IR. The removal of dibenzothiophene （DBT） in model oil was studied by using [Ala]3PW as catalysts, hydrogen peroxide as oxidant and imidazolium tetrafluoroborate （[ HMIM ] BF4 ） as the extractant. The influence of reaction temperature, the amount of catalysts, the molar ratio of O/S （H2OJDBT）, the amount of extractant and types of thiophene on the desulfurization efficiency were investigated. The results indicated that under the optimal reaction conditions of 10 mL model oil, 0.04 g of [ Ala ] 3 PW, O/S （ mol ratio） = 6, V（ [ HMIM ] BF4 ） / V（oil）= 0.6, reaction temperature of 50℃and reaction time of 180 min, removal of DBT was found to be 98.2%. The catalyst could be recycled 4 times without a significant decrease in activity.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2014年第11期1394-1399,共6页
Journal of Fuel Chemistry and Technology
关键词
L-丙氨酸
磷钨酸
二苯并噻吩
脱硫
alanine
phosphotungstic acid
dibenzothiophene
desulfurization
