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A process for enhancing the operability of hot gas cleanup for the production of synthesis gas in which a stream of methane rich gas is autothermally reformed at a temperature and pressure sufficient to generate a stream of synthesis gas rich in hydrogen and carbon monoxide, the synthesis gas is sub

A process for enhancing the operability of hot gas cleanup for the production of synthesis gas in which a stream of methane rich gas is autothermally reformed at a temperature and pressure sufficient to generate a stream of synthesis gas rich in hydrogen and carbon monoxide, the synthesis gas is subjected to condensation and removing the resultant water, and sulfur impurities are removed from the resultant synthesis gas stream.

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1. A process for enhancing the operability of hot gas cleanup for the production of synthesis gas, comprising: providing a stream of producer gas, obtained from steam hydrogasification, comprising methane, water and sulfur impurities;autothermally reforming the producer gas at a temperature and pres

1. A process for enhancing the operability of hot gas cleanup for the production of synthesis gas, comprising: providing a stream of producer gas, obtained from steam hydrogasification, comprising methane, water and sulfur impurities;autothermally reforming the producer gas at a temperature and pressure sufficient to generate a stream of synthesis gas comprising hydrogen, carbon monoxide, steam, and sulfur impurities at a temperature of between 550° C. to 750° C.;after the step of autothermally reforming performing a step of cooling said synthesis gas to thereby effect condensation of the steam, and removing the steam;after the step of condensing and removing the steam performing a step of heating the synthesis gas to a sulfur removal temperature of between 250° C. to 400° C.;removing, after the step of heating the syngas, said sulfur impurities from the heated synthesis gas stream using a metal oxide sorbent to thereby produce a cleaned synthesis gas; andremoving nitrogen from the cleaned synthesis gas. 2. The process of claim 1 wherein the condensation of the synthesis gas stream is at substantially the pressure at which the impurities are removed from the synthesis gas stream. 3. The process of claim 1 wherein the pressure of the steam-hydrogasification, autothermal reforming, condensation, and impurity removal is the same throughout. 4. The process of claim 1 wherein the autothermal methane reforming is conducted under conditions whereby the composition of synthesis gas produced has a H2: CO mole ratio of 3 to 4. 5. The process of claim 1 in which synthesis gas generated by the removing impurities stage is used as fuel for process heat and/or in a fuel engine or gas turbine that can generate electricity. 6. The process of claim 1, wherein the autothermally reforming step is performed using noble metal catalysts. 7. The process of claim 3 wherein said substantially the same pressure is in the range of about 150 psi to 500 psi. 8. The process of claim 1 wherein the stream of methane rich gas reacts for autothermal reforming with oxygen stream diluted with nitrogen, the oxygen content of which is in the range of about 15% volm to 25% volm. 9. The process of claim 1 wherein the stream of the producer gas is produced from separate steam pyrolysis and hydro-gasification reactors. 10. The process of claim 9 wherein the producer gas is produced from carbonaceous material that comprises municipal waste, biomass, wood, coal, or a natural or synthetic polymer. 11. The process of claim 1, further comprising feeding the synthesis gas, after it has been removed of the impurities, into a Fischer-Tropsch type reactor under conditions whereby a liquid fuel is produced. 12. The process of claim 11 comprising transferring exothermic heat from the Fischer-Tropsch type reaction to a steam-hydrogasification reaction and/or an autothermal methane reforming reaction. 13. A process for enhancing the operability of hot gas cleanup for the production of synthesis gas, comprising: providing a stream of producer gas, produced by steam-hydrogasification, comprising methane, water and sulfur impurities;autothermally reforming the producer gas comprising the methane, water and sulfur impurities by reacting with oxygen diluted with nitrogen, the oxygen content of which is in the range of about 15% volm to about 25% volm, at about 550° C. to about 750° C. and at a pressure sufficient to generate a stream of synthesis gas rich in hydrogen, carbon monoxide, and steam;after the step of autothermally reforming performing a step of subjecting said synthesis gas to condensation and removing the steam;after the step of condensing and removing the steam performing a step of heating the synthesis gas stream resulting from condensation to substantially the temperature of about 250° C. to 400° C.; andremoving the impurities, after said condensation, from the resultant synthesis gas stream at about 250° C. to 400° C. using a metal oxide sorbent to thereby produce a cleaned synthesis gas;wherein the pressure of the steam-hydrogasification, autothermal reforming, condensation, and impurity removal are the same throughout in the range of about 150 psi to 500 psi; andremoving nitrogen from the cleaned synthesis gas.