摘要
利用脉冲电磁场(PEMF)辅助浸渍法和常规等体积浸渍法制备了一系列CoMo/γ-Al_2O_3加氢脱硫催化剂样品。以噻吩、2-甲基噻吩或苯并噻吩为模型化合物,在微反装置上评价了催化剂的加氢脱硫活性,经200 V脉冲电磁场处理的催化剂上各硫化物的转化率均比常规催化剂明显提高。采用XRD、BET、H_2-TPR和TEM等方法表征了催化剂样品的表面状态和物化性质。结果表明,适当强度的脉冲电磁场与制备体系内带电粒子的交互作用有助于催化剂活性组分的分散,使活性组分在γ-Al_2O_3载体表面分布更为均匀,同时削弱了活性组分MoO_3同载体间的较强相互作用,降低了催化剂表面钼物种的还原温度,促进了CoMoS活性相的形成。
CoMo/γ-Al 2O 3 catalyst for hydrodesulfurization(HDS)were prepared by equal volume impregnation method with and without the presence of pulsed electronmagnetic field(PEMF).Experimental results revealed that the catalyst prepared by PEMF with a voltage of 200 V exhibited higher catalytic activity for hydrodesulfurization of thiophene,2-methythiophene and benzothiophene than the catalyst prepared by conventional impregnation.The surface morphology and physico-chemical properties were characterized by using BET,XRD,H 2-TPR and TEM techniques,respectively.The results showed that appropriate PEMF treatment promotes the active component dispersion on theγ-Al 2O 3 surface by interacting with the charged particles in reaction system.The interaction between the support and the active species MoO 3 is weakened and thus facilitates the reduction of the catalyst and the formation of CoMoS active phase.
作者
彭淑静
王建中
唐立丹
唐克
PENG Shu-jing;WANG Jian-zhong;TANG Li-dan;TANG Ke(School of Chemical and Environmental Engineering,Liaoning University of Technology,Jinzhou 121001,China;;School of Materials Science and Engineering,Liaoning University of Technology,Jinzhou 121001,China)
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2018年第12期1498-1504,共7页
Journal of Fuel Chemistry and Technology
基金
辽宁省自然科学基金(201202096)
辽宁省教育厅团队项目(LT2013014)
辽宁省教育厅一般研究项目(L2015236)资助~~
