模拟燃油脱硫中原位产生过氧化氢的影响

Influence of in situ H2O2 generation in simulated fuel desulfurization

采用水热法和浸渍法制备了Pd/MIL-101(Cr)催化剂,考察了Pd的负载量、催化剂用量、反应温度、V(异丙醇)∶V(乙腈)等对原位产生过氧化氢的影响;并在最佳反应条件下,对含100 mg/kg二苯并噻吩的模拟燃油进行脱硫实验,测定原位产生过氧化氢后的脱硫率。实验结果表明,以Pd/MIL-101(Cr)为催化剂构建的模拟燃油反应可以实现原位产生过氧化氢,在反应温度50℃、V(异丙醇)∶V(乙腈)=1∶1、Pd负载量25%(w)的催化剂Pd/MIL-101(Cr)用量为0.1 g的最佳条件下反应10 min时,过氧化氢含量可达36.117 mg/L,模拟燃油脱硫率可达到95.1%,实现了模拟燃油的深度脱硫。

The Pd/MIL-101(Cr)catalyst was prepared by hydrothermal method and impregnation method.The effects of Pd loading amount,catalyst amount,reaction temperature and V(isopropyl alcohol)∶V(acetonitrile)on the in situ generation of hydrogen peroxide were investigated.Under the optimal reaction conditions,the desulfurization of simulated fuel oil containing 100 mg/kg dibenzothiophene was tested to determine the desulfurization rate by hydrogen peroxide generated in situ.The experimental results show that the simulated fuel oil reaction constructed with Pd/MIL-101(Cr)catalyst can generate hydrogen peroxide in situ,and when the reaction temperature is 50℃,V(isopropyl alcohol)∶V(acetonitrile)1∶1,the amount of Pd/MIL-101(Cr)catalyst with 25%(w)of Pd loading is 0.1 g,and the reaction time is 10 min,the content of hydrogen peroxide can reach 36.117mg/L,and the desulfurization rate of the simulated fuel oil can reach 95.1%,realizing the deep desulfurization of simulated fuel oil.