H2WO4/GO的制备及其超声-氧化脱除模拟油中的硫化物

Preparation of H2WO4/GO and its ultrasonic-oxidative desulfurization in model oil

以钨酸和氧化石墨烯为原料,利用浸渍法将钨酸负载到氧化石墨烯上制得H2WO4/GO。采用XRD、FT-IR、SEM、BET表征确定H2WO4/GO的形态及其结构。以H2WO4/GO作为催化剂,H2O2作为氧化剂,乙腈作为萃取剂超声氧化脱除模拟油中的二苯并噻吩(DBT)。实验表明,在模拟油为5mL,钨酸的负载量为30%(质量分数),催化剂为0.02g,乙腈为1mL,H2O2/S(molratio)为8,反应温度为50℃,超声功率为150W的最佳反应条件下,二苯并噻吩(DBT)、4,6-二甲基二苯并噻吩(4,6-DMDBT)、苯并噻吩(BT)的脱除率分别达到96.6%、81.2%、72.8%。同时,考察了催化剂的循环使用性能,并对超声氧化脱硫机理进行了研究。

H2WO4/GO was prepared by dipping method using tungstic acid and graphene oxide as raw materials. The morphology and structure of H2WO4/GO were characterized by XRD, FT-IR, SEM and BET. The ultrasonic-oxidation desulfurization of model oil containing DBT was carried out with H2WO4/GO as catalyst, H2O2 as oxidant agent and acetonitrile as extractant. Under the optimum conditions with 5 mL of model oil, 30% of tungstic acid loading(mass ratio), 0.02 g of catalyst, 1 mL of acetonitrile, H2O2/S mol ratio of 8, ultrasonic power of 150 W and at 50 ℃, the removal rate of DBT, 4,6-DMDBT and BT can reach 96.6%, 81.2%, 72.8%, respectively. Besides, the recycling use of catalyst and the mechanism of ultrasonic-oxidation desulfurization were investigated.