Process for the production of synthesis gas
First Claim
1. Process for the production of synthesis gas from a hydrocarbon feed stock comprising the steps of endothermic and/or adiabatic catalytic steam reforming and autothermal steam reforming in series, wherein the steam reforming is carried out in one or more endothermic stages in series and/or in one or more adiabatic steam reforming stages in series with intermediate heating of feed stock gas leaving the adiabatic reforming stages and wherein carbon monoxide containing gas characterised by having a molar ratio of hydrogen to carbon of less than 4.5 is added prior to at least one of the endothermic or adiabatic steam reforming stages and/or prior to the autothermal steam reforming step.
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Abstract
Process and system for the production of synthesis gas from a hydrocarbon feed stock comprising the steps of endothermic and/or adiabatic catalytic steam reforming and autothermal steam reforming in series, wherein the steam reforming is carried out in one or more endothermic stages in series or in one or more adiabatic steam reforming stages in series with intermediate heating of feed stock gas leaving the adiabatic reforming stages and wherein carbon monoxide containing gas characterised by having a molar ratio of hydrogen to carbon of less than 4.5 is added prior to at least one of the endothermic or adiabatic steam reforming stages and/or prior to the autothermal steam reforming step.
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Citations
10 Claims
- 1. Process for the production of synthesis gas from a hydrocarbon feed stock comprising the steps of endothermic and/or adiabatic catalytic steam reforming and autothermal steam reforming in series, wherein the steam reforming is carried out in one or more endothermic stages in series and/or in one or more adiabatic steam reforming stages in series with intermediate heating of feed stock gas leaving the adiabatic reforming stages and wherein carbon monoxide containing gas characterised by having a molar ratio of hydrogen to carbon of less than 4.5 is added prior to at least one of the endothermic or adiabatic steam reforming stages and/or prior to the autothermal steam reforming step.
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10. Steam reforming system for use in a process for the production of synthesis gas from a hydrocarbon feed stock comprising
optionally a pre-reformer for adiabatic pre-reforming of the feed stock; -
a reformer for endothermic catalytic steam reforming and/or at least a first and last adiabatic catalytic steam reformer connected in series;
means for intermediate heating of the feed stock between the at least first and last adiabatic steam reformer;
a down stream autothermal steam reformer connected in series with the reformer for endothermic steam reforming or with the last adiabatic steam reformer; and
means for addition of a carbon monoxide containing gas upstream the endothermic steam reformer or upstream of the at least first and/or last adiabatic reformer and/or upstream of the autothermal reformer.
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Specification