Controlling the synthesis gas composition of a steam methane reformer
AssigneeThe Regents of the University of California
InventorsJoseph M. Norbeck, Chan Seung Park, Arun Sk Raju, Kiseok Kim
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Abstract
Systems and methods for processing a methane rich producer gas are provided in which the producer gas is preferably produced via steam-hydrogasification. The product stream from the steam-hydrogasification is then subjected to autothermal reforming, steam is removed after the reforming step via condensation, and sulfur impurities are subsequently eliminated. In most preferred aspects, the process pressure is substantially maintained throughout all steps, typically in a range of 150 psi to 500 psi.
Claims15
A method of processing a methane containing gas from a steam-hydrogasification reactor to thereby form a syngas, comprising:
- feeding hydrogen and an aqueous slurry of water and a carbonaceous material to a steam-hydrogasification reactor;
- operating the steam-hydrogasification reactor at a pressure and under conditions effective to form steam from the slurry to thereby, with the hydrogen, form a methane-containing product gas;
- feeding the methane-containing product gas into an autothermal methane reformer, and subjecting the methane-containing product at the pressure to a reforming reaction to thereby form a hydrogen-enriched product gas;
- condensing steam from the hydrogen-enriched product gas at the pressure to thereby form a dehydrated hydrogen-enriched product gas;
- and
- removing sulfur compounds at the pressure from the dehydrated hydrogen-enriched product gas to thereby form the syngas.
Dependencies are inferred from the claim text.