Autothermal reformer-reforming exchanger arrangement for hydrogen production
First Claim
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1. A process for reforming a hydrocarbon, comprising:
- catalytically reforming a first portion of a hydrocarbon feed in the presence of steam and excess air in a first catalyst zone to produce a first effluent;
thermally reforming a second portion of the hydrocarbon feed in the presence of steam in a second catalyst zone to form a second effluent;
combining the first effluent and second effluent to form a mixed effluent;
indirectly exchanging heat from the mixed effluent to the second catalyst zone; and
shift converting the mixed effluent to obtain a carbon dioxide-rich gas.
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Abstract
Low-energy, low-capital hydrogen production is disclosed. A reforming exchanger 14 is placed in parallel with an autothermal reformer (ATR) 10 to which are supplied a preheated steam-hydrocarbon mixture. An air-steam mixture is supplied to the burner/mixer of the ATR 10 to obtain a syngas effluent at 650°-1050° C. The effluent from the ATR is used to heat the reforming exchanger, and combined reformer effluent is shift converted and separated into a mixed gas stream and a hydrogen-rich product stream. High capital cost equipment such as steam-methane reformer and air separation plant are not required.
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Citations
19 Claims
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1. A process for reforming a hydrocarbon, comprising:
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catalytically reforming a first portion of a hydrocarbon feed in the presence of steam and excess air in a first catalyst zone to produce a first effluent; thermally reforming a second portion of the hydrocarbon feed in the presence of steam in a second catalyst zone to form a second effluent; combining the first effluent and second effluent to form a mixed effluent; indirectly exchanging heat from the mixed effluent to the second catalyst zone; and shift converting the mixed effluent to obtain a carbon dioxide-rich gas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 19)
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12. A process for reforming a hydrocarbon, comprising:
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catalytically reforming a first portion of a hydrocarbon feed in the presence of steam and excess air in a first catalyst zone to produce a first effluent; thermally reforming a second portion of the hydrocarbon feed in the presence of steam in a second catalyst zone to form a second effluent; combining the first effluent and second effluent to form a mixed effluent; indirectly exchanging heat from the mixed effluent to the second catalyst zone; shift converting the mixed effluent to obtain a carbon dioxide-rich gas; separating the carbon dioxide-rich gas to provide a hydrogen-lean, mixed gas and a hydrogen rich gas, wherein the hydrogen-lean mixed gas comprises nitrogen and carbon dioxide; and hydrotreating a hydrocarbon using the hydrogen rich gas. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification