Journal
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume 70, Issue 1, Pages 111-124Publisher
SPRINGER
DOI: 10.1007/s10971-014-3280-1
Keywords
Dry reforming; CH4/CO2; Syngas; Ni-Co/Al2O3-MgO-ZrO2; Sol-gel
Categories
Funding
- Sahand University of Technology
- Iran Nanotechnology Initiative Council
Ask authors/readers for more resources
Sol-gel method was employed to prepare Ni-Co/Al2O3-MgO-ZrO2 nanocatalyst with various loadings of MgO (5, 10 and 25 wt%) for dry reforming of methane. The physiochemical properties of nanocatalysts were characterized by XRD, field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX), BET and fourier transform infrared spectroscopy (FTIR) analysis. Evaluation of catalytic performance was conducted in atmospheric pressure, stoichiometric feed ratio, GHSV of 24 l/g(cat) h and temperature range from 550 to 850 A degrees C. XRD patterns represented that as MgO content increases, the amorphous behavior slightly intensifies and also dispersion of active phase improves which probably caused by strong metal-support interaction. Furthermore, FESEM analysis confirmed that all of prepared samples are nano scale. EDX results besides verifying the declared claim about the dispersion of samples proved the presence and detected the position of the various elements. In addition, based on the FESEM analysis, narrow particle size distribution, uniform morphology and dispersion without agglomeration were found for Ni-Co/Al2O3-MgO-ZrO2 with 25 wt% MgO. Moreover, smallest average particle size 11.6 nm (close to the critical size for Ni-Co catalyst to avoid carbon formation) was obtained for this nanocatalyst. Also, according to the BET analysis, MgO rich nanocatalyst represented the higher surface area than the other ones. Based on the excellent characterizations, Ni-Co/Al2O3-MgO-ZrO2 with 25 wt% MgO exhibited the best products yield through all of the investigated temperature e.g. H-2 = 96.9 % and CO = 97.1 % at 850 A degrees C. Furthermore, this nanocatalyst demonstrated the stable yield with H-2/CO close to unit during 1,440 min stability test.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available