Ni/KIT-6催化剂上乙醇自热干气重整反应研究

Investigation of Autothermal Dry Reforming of Ethanol over Ni/KIT-6 Catalyst

利用甲醇湿浸渍法制备KIT-6担载型镍基催化剂,并考察其乙醇自热干气重整反应性能。通过BET、XRD、H_2-TPR和FSSEM对反应前后催化剂的结构和物理性质进行表征。结果表明,Ni/KIT-6催化剂具有较高的比表面积、良好的还原性、活性组分Ni均匀分散在催化剂表面。在乙醇自热干气重整反应中该催化剂表现出了较高的活性和优异的稳定性。在反应温度为500℃时,乙醇的转化率就达到100%,并且该催化剂活性在连续80 h的稳定性测试后没有明显下降。

Ni catalyst supported on KIT-6 was prepared by wet impregnation of methanol and its catalytic performance towards autothermal dry reforming of ethanol was investigated.In addition,the structure and physicochemical properties of the catalysts before and after reaction were characterized by BET,XRD,H 2-TPR and FESEM.The results revealed that the as-prepared Ni/KIT-6 catalyst possessed relatively high specific surface area,good reducibility and homogeneous dispersion of active Ni species on the catalyst surface.Interestingly,Ni/KIT-6 catalyst presented satisfactory activity and good stability for autothermal dry reforming of ethanol.Definitely,full ethanol conversion was achieved at 500℃and no obvious deactivation was observed after 80 h on-stream test.