摘要
以γ-Al_2O_3为载体,通过等体积浸渍法,制备了CoO/MoO_3/Al_2O_3催化剂。采用N_2吸附-脱附、X射线衍射(XRD)对CoO/MoO_3/Al_2O_3进行表征分析。以二苯并噻吩(DBT)、4-甲基二苯并噻吩(4-MDBT)为模型柴油的有机硫化物,30%的过氧化氢为氧化剂,考察了CoO/MoO_3/Al_2O_3催化剂的催化性能,并且研究了不同Mo/Co摩尔比、催化剂焙烧温度、投加量、反应时间及温度对氧化脱硫的影响。实验结果表明:H_2O_2-CoO/MoO_3/Al_2O_3构成的氧化体系能有效氧化模型柴油中的有机硫化物,DBT和4-MDBT脱硫率分别达到98.8%、93.4%;Mo/Co摩尔比、催化剂焙烧温度、投加量、反应时间及温度对有机硫化物的氧化脱硫均有影响;CoO/MoO_3/Al_2O_3催化剂经过再生处理后可重复使用,具有良好的稳定性。
A series of γ-Al2O3 supported CoO/MoO3/Al2O3 catalysts were prepared by incipient wetness impregnation method and characterized by means of N2adsorption-desorption and XRD. In this oxidation reaction, 4-methyldibenzothiophene and dibenzothiophene were used as organo-sulfur compounds, and 30% H2O2was used as oxidant, the properties of the catalysts were evaluated, and the influences of molar ratio of Mo/Co, the calcination temperature the and dosage of catalysts, reaction time and temperature on sulfur removal efficiency were investigated. The results showed that the H2O2-CoO/MoO3/Al2O3 oxidation system can oxidize the organic sulfides effectively, the sulfur removal efficiency of dibenzothiophene and 4-methyldibenzothiophene was 98.8% and 93.4%. The results also showed that the molar ratio of Mo/Co, the calcination temperatureand the dosage of catalysts, reaction time and temperature all affected the sulfur removal. The catalyst can be reused after being regenerated, indicating its excellent stability.
出处
《浙江化工》
CAS
2016年第12期30-35,共6页
Zhejiang Chemical Industry
基金
周口师范学院创新基金(zknu A201601)
