A new process concept that has been proposed for effective conversion of CO2 in the flue gases from electric power plants without CO2 pre-separation, which can be used for the production of synthesis gas (syngas) with desired H2/CO ratios for synthesizing clean fuels and chemicals, was presented. The tri-reforming concept represents a new way of thinking both for conversion and utilization of CO2 in flue gas without CO2 separation, and for production of industrially useful syngas with desired H2/CO ratios using flue gas and natural gas. Experimental results with Ni catalysts were described. Catalytic tri-reforming of methane could be achieved successfully with high CH4 conversion (> 97%) and high CO2 conversion (> 80%) for producing syngas with desired H2/CO ratios of 1.5-2 over supported Ni catalysts at 800°-850°C under 1 atm without the problem of carbon formation on the catalyst. Among the catalysts tested for tri-reforming, their ability to enhance the conversion of CO2 followed the order of Ni/MgO > Ni/MgO/CeZrO > Ni/CeO2 ≈ Ni/ZrO2 ≈ Ni/Al2O3 (ICI) > NiCeZrO.
|Original language||English (US)|
|Journal||Am Chem Soc Div Fuel Chem Prepr|
|State||Published - Mar 2004|
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