System and method for recycling pressure swing absorber off-gas
AssigneeGas Technology Institute
InventorsJeffrey A. Mays, Megan Herrera
Life of this patent
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Abstract
A method and system for an enhanced reforming process employing a pressure swing absorber. An off-gas from the pressure swing absorber is divided with a first portion sent back into a reforming reactor and a second portion sent to a heat generator for the reforming process. The first off-gas portion from the pressure swing absorber can be pressurized by a compressor and reintroduced into a fluidized bed reactor.
Claims20
In a sorbent enhanced reforming process employing a pressure swing absorber (PSA), an improvement comprising:
- recycling at least a first portion of a PSA off-gas stream produced by the pressure swing absorber to a reforming reactor of the reforming process, wherein the recycled first portion of the PSA off gas stream undergoes H2 separation processing prior to introduction into the reforming reactor.
A method of sorbent enhanced reforming, the method comprising:
- introducing superheated steam and a natural gas feed to a reforming reactor to produce a H2 rich fluid stream;
- introducing the H2 rich fluid stream to a pressure swing absorber (PSA) to produce a purified H2 product and a PSA off-gas stream;
- recycling at least a first portion of the PSA off-gas stream to the reforming reactor;
- and
- removing H2 from the at least a first portion of the PSA off-gas stream prior to introduction into the reforming reactor.
A system for sorbent enhanced reforming, comprising:
- a reforming reactor including a sorbent, and configured to receive a natural gas and produce a H2 rich fluid stream by adsorbing CO2 using the sorbent;
- a pressure swing absorber (PSA) configured to receive the H2 rich fluid stream and produce a purified H2 product and a PSA off-gas stream;
- a recycle line connecting the pressure swing absorber to the reforming reactor, and configured to introduce at least a first portion of the PSA off-gas stream to the reforming reactor;
- and
- a H2 separation system in combination with the recycle line and configured to remove H2 from the first portion of the PSA off-gas stream before the reforming reactor.
In a sorbent enhanced reforming process employing a pressure swing absorber (PSA), an improvement comprising:
- recycling at least a first portion of a PSA off-gas stream produced by the pressure swing absorber to a reforming reactor of the reforming process, wherein a second portion of the PSA off-gas stream is introduced to a firebox of the sorbent enhanced reforming process, and a portion of a purified H2 product from the pressure swing absorber is introduced to the second portion of the PSA off-gas stream.
In a sorbent enhanced reforming process employing a pressure swing absorber (PSA), an improvement comprising:
- recycling at least a first portion of a PSA off-gas stream produced by the pressure swing absorber to a reforming reactor of the reforming process, wherein the recycled first portion of the PSA off-gas stream undergoes compression processing prior to introduction into the reforming reactor, the reforming reactor comprises a fluidized bed reactor, and the compressed recycled first portion of the PSA off-gas stream is heated and introduced with a superheated steam and natural gas feed to the fluidized bed reactor.
Dependencies are inferred from the claim text.