Remarkable differences in CO2 reforming of CH4 at
atmospheric pressure and high pressure were observed. The
differences in catalyst activity at 1 atm and 27 atm are in large
part due to thermodynamic limitations. The results are consistent
with a vast amount of literature onCH4 reforming. Both Ni/Na-Y
and Ni/Al2O3 were reasonably active at atmospheric pressure
with high CO2 and CH4 conversion (>89%). The conversions
over the same catalysts show a drastic decrease at high pressure
(27 atm), but the change in pressure had different impacts onCO2
and CH4 conversions, and varied effects on H2/CO ratios of the
syngas products. Carbon formation on some catalysts that
display a superior performance at atmospheric pressure may be
exacerbated at high pressure.