TY - JOUR
T1 - NiMg/Ceria-Zirconia Cylindrical Pellet Catalysts for Tri-reforming of Surrogate Biogas
AU - Zhao, Xianhui
AU - Walker, Devin M.
AU - Maiti, Debtanu
AU - Petrov, Amanda D.
AU - Kastelic, Matthew
AU - Joseph, Babu
AU - Kuhn, John N.
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2018/1/24
Y1 - 2018/1/24
N2 - Cylindrical NiMg/Ce0.6Zr0.4O2 pellet catalysts with two different sizes (large, radius = 1.59 mm; small, radius = 0.75 mm) were produced by extrusion of powder catalysts. The small catalyst pellets had a higher specific surface area, pore volume, average pore size, radial crush strength, and resistance to breakage than the large pellets. Tri-reforming tests with surrogate biogas were conducted at 3 bar and 882 °C, with the feed molar ratios of CH4:CO2:air fixed at 1.0:0.7:0.95 and the H2O/CH4 molar feed ratio varied (0.35-1.16). The small catalyst pellets exhibited lower internal mass-transfer resistance and higher coking resistance compared to the large pellets. CO2 conversion decreased and H2/CO molar ratio increased with the increase of H2O/CH4 molar feed ratio, which are consistent with the trends predicted by thermodynamic equilibrium calculations. The results indicate that the NiMg/Ce0.6Zr0.4O2 catalyst pellets are promising for commercial scale applications.
AB - Cylindrical NiMg/Ce0.6Zr0.4O2 pellet catalysts with two different sizes (large, radius = 1.59 mm; small, radius = 0.75 mm) were produced by extrusion of powder catalysts. The small catalyst pellets had a higher specific surface area, pore volume, average pore size, radial crush strength, and resistance to breakage than the large pellets. Tri-reforming tests with surrogate biogas were conducted at 3 bar and 882 °C, with the feed molar ratios of CH4:CO2:air fixed at 1.0:0.7:0.95 and the H2O/CH4 molar feed ratio varied (0.35-1.16). The small catalyst pellets exhibited lower internal mass-transfer resistance and higher coking resistance compared to the large pellets. CO2 conversion decreased and H2/CO molar ratio increased with the increase of H2O/CH4 molar feed ratio, which are consistent with the trends predicted by thermodynamic equilibrium calculations. The results indicate that the NiMg/Ce0.6Zr0.4O2 catalyst pellets are promising for commercial scale applications.
UR - http://www.scopus.com/inward/record.url?scp=85041214686&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.7b03669
DO - 10.1021/acs.iecr.7b03669
M3 - Article
AN - SCOPUS:85041214686
SN - 0888-5885
VL - 57
SP - 845
EP - 855
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 3
ER -
