کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6456285 | 1419845 | 2017 | 10 صفحه PDF | دانلود رایگان |
- The DRM catalytic performance over Ni-SBA-15 showed remarkably stability.
- No obvious carbon deposition was detected over the Ni-SBA-15.
- The Ni sintering was greatly suppressed by strong metal-support interaction.
- The average crystalline size of the Ni particles size was â¼3.2Â nm on Ni-SBA-15.
Nickel-containing ordered mesoporous silica materials (Ni-SBA-15, Ni-KIT-6 and Ni-MCM-41) were prepared by solid-state grinding method and applied to the dry reforming of methane (DRM). After reacting at 700 °C for 100 h, the catalytic activity and stability declined in the following sequence: Ni-SBA-15 > Ni-KIT-6 > Ni-MCM-41. The characterization results indicated that the average size of the Ni particles on Ni-SBA-15 was â¼3.2 nm, and no visible NiO diffraction peak observed on Ni-SBA-15, implying that the nickel species were highly dispersed on the SBA-15. Moreover, the reduction temperature of Ni species on Ni-SBA-15 obviously shifted to higher temperature compared with the Ni/SBA-15 prepared by impregnation method, indicating that the interaction between the Ni species and mesoporous support was enhanced. The Ni-SBA-15 also presented excellent resistance to the carbon deposition, and the carbon deposition decreased in the order of Ni-MCM-41 (38.8%) > Ni-KIT-6 (8.1%) > Ni-SBA-15 (6.3%) after reacting at 700 °C for 100 h.
Ni-SBA-15 was prepared by solid-state grinding method and applied to the dry reforming of methane. Coking and sintering were inhibited simultaneously by the strong interaction between the well-dispersed Ni species and SBA-15. The conversions of CO2 and CH4 over Ni-SBA-15 showed remarkably stable even reacted at 700 °C for 100 h.126
Journal: Journal of CO2 Utilization - Volume 17, January 2017, Pages 10-19