EP3579959A1 - Power generation using hydrogen fuel with economical carbon dioxide capture - Google Patents
Power generation using hydrogen fuel with economical carbon dioxide captureInfo
- Publication number
- EP3579959A1 EP3579959A1 EP18751678.6A EP18751678A EP3579959A1 EP 3579959 A1 EP3579959 A1 EP 3579959A1 EP 18751678 A EP18751678 A EP 18751678A EP 3579959 A1 EP3579959 A1 EP 3579959A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sorbent
- product
- carbon dioxide
- gas
- calciner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 200
- 239000001257 hydrogen Substances 0.000 title claims abstract description 140
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 140
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 137
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 108
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 72
- 239000000446 fuel Substances 0.000 title claims abstract description 17
- 238000010248 power generation Methods 0.000 title claims description 10
- 239000002594 sorbent Substances 0.000 claims abstract description 155
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 112
- 239000003345 natural gas Substances 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 24
- 229910021386 carbon form Inorganic materials 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 64
- 239000007787 solid Substances 0.000 claims description 40
- 239000003054 catalyst Substances 0.000 claims description 26
- 238000004519 manufacturing process Methods 0.000 claims description 26
- 238000002407 reforming Methods 0.000 claims description 17
- 238000011084 recovery Methods 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 238000003860 storage Methods 0.000 claims description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 10
- 239000003546 flue gas Substances 0.000 claims description 9
- 230000005587 bubbling Effects 0.000 claims description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 230000003197 catalytic effect Effects 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 239000011593 sulfur Substances 0.000 claims description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 5
- 239000004202 carbamide Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 235000013361 beverage Nutrition 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims 2
- 239000000047 product Substances 0.000 description 39
- 238000011161 development Methods 0.000 description 30
- 230000018109 developmental process Effects 0.000 description 30
- 238000012545 processing Methods 0.000 description 23
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 21
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 18
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 17
- 239000000292 calcium oxide Substances 0.000 description 17
- 238000000926 separation method Methods 0.000 description 15
- -1 e.g. Substances 0.000 description 11
- 229910000019 calcium carbonate Inorganic materials 0.000 description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 150000001412 amines Chemical class 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 150000002431 hydrogen Chemical class 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000006227 byproduct Substances 0.000 description 4
- 229940112112 capex Drugs 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- FEBLZLNTKCEFIT-VSXGLTOVSA-N fluocinolone acetonide Chemical compound C1([C@@H](F)C2)=CC(=O)C=C[C@]1(C)[C@]1(F)[C@@H]2[C@@H]2C[C@H]3OC(C)(C)O[C@@]3(C(=O)CO)[C@@]2(C)C[C@@H]1O FEBLZLNTKCEFIT-VSXGLTOVSA-N 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 238000003795 desorption Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 238000001991 steam methane reforming Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000008239 natural water Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- MWRWFPQBGSZWNV-UHFFFAOYSA-N Dinitrosopentamethylenetetramine Chemical compound C1N2CN(N=O)CN1CN(N=O)C2 MWRWFPQBGSZWNV-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000004523 catalytic cracking Methods 0.000 description 1
- 238000001833 catalytic reforming Methods 0.000 description 1
- 239000013626 chemical specie Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011234 economic evaluation Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- 230000009919 sequestration Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3433—Regenerating or reactivating of sorbents or filter aids other than those covered by B01J20/3408 - B01J20/3425
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3458—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
- C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
- C01B3/38—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts
- C01B3/42—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts using moving solid particles
- C01B3/44—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts using moving solid particles using the fluidised bed technique
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/02—Processes for making hydrogen or synthesis gas
- C01B2203/0205—Processes for making hydrogen or synthesis gas containing a reforming step
- C01B2203/0227—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step
- C01B2203/0233—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step the reforming step being a steam reforming step
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/042—Purification by adsorption on solids
- C01B2203/0425—In-situ adsorption process during hydrogen production
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/042—Purification by adsorption on solids
- C01B2203/043—Regenerative adsorption process in two or more beds, one for adsorption, the other for regeneration
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/0465—Composition of the impurity
- C01B2203/0475—Composition of the impurity the impurity being carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/08—Methods of heating or cooling
- C01B2203/0872—Methods of cooling
- C01B2203/0883—Methods of cooling by indirect heat exchange
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/12—Feeding the process for making hydrogen or synthesis gas
- C01B2203/1258—Pre-treatment of the feed
- C01B2203/1264—Catalytic pre-treatment of the feed
- C01B2203/127—Catalytic desulfurisation
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/80—Aspect of integrated processes for the production of hydrogen or synthesis gas not covered by groups C01B2203/02 - C01B2203/1695
- C01B2203/84—Energy production
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/80—Aspect of integrated processes for the production of hydrogen or synthesis gas not covered by groups C01B2203/02 - C01B2203/1695
- C01B2203/86—Carbon dioxide sequestration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
Definitions
- This invention relates generally to power generation and, more particularly, to the generation of power using hydrogen fuel such as derived from natural gas.
- hydrogen fuel such as derived from natural gas.
- specific aspects of the subject development relate to devices, systems and methods for direct production of hydrogen (H 2 ) from natural gas as an alternative to steam methane reformers.
- the subject development can serve to cost-effectively minimize the impact on the cost of electricity from a power plant that is required to capture CO2 (a greenhouse gas) from its emissions.
- CO2 a greenhouse gas
- the current state of the art turbine or heat engine system for converting natural gas to electric power, hydrogen, and carbon dioxide with 90% CC3 ⁇ 4 separation relies on reforming natural gas to hydrogen and carbon dioxide using a traditional Steam Methane Reformer (SMR) for conversion of methane and steam to syngas and a water gas shift reactor for conversion of the syngas to hydrogen and carbon dioxide.
- SMR Steam Methane Reformer
- the carbon dioxide is separated from the hydrogen using an amine absorption column.
- a secondary amine absorption system is utilized to separate the carbon dioxide from the reformer firebox flue gas, maximizing the carbon dioxide available for sale or reuse.
- the hydrogen is then optionally purified using a Pressure Swing Absorption (PSA) system before being used as fuel in a gas turbine modified for hydrogen fuel or in an advanced hydrogen turbine.
- a heat recovery steam generator is used as a bottoming cycle for high efficiency.
- the subject invention relates generally to an innovative, compact and scalable devices, systems and processes for direct production of hydrogen (H 2 ) from natural gas as an alternative to steam methane reformers.
- the Compact Hydrogen Generator (CHG) process described herein may desirably utilize calcium oxide (CaO) as a sorbent for the in-situ removal of by-product carbon dioxide which directly produces a 92+ vol% pure H 2 product, resulting in lower equipment costs, higher H 2 yields and a concentrated CO2 product stream suitable for Carbon Capture and Sequestration (CCS) or other applications.
- CaO calcium oxide
- a sorbent such as CaO is facilitated and/or made possible by the novel use of a bubbling fluidized bed of catalyst particles with the sorbent, e.g., CaO, being injected such as with steam and/or natural gas (methane) or a mixture thereof.
- the sorbent, e.g., CaO preferably has a fine particle size and is elutriated through the catalyst bed during which it absorbs or otherwise binds with or picks-up the CO2 such as CaO converting to calcium carbonate (CaC0 3 ).
- Particular aspects and embodiments of the subject invention advantageously utilize a Compact Hydrogen Generator for the economical production of electricity.
- specific systems and methods in accordance with the subject development take advantage of CHG's low CAPEX (lower than current SMR technology) and the capability of the subject development to separate CO2 without additional equipment which makes concurrent CO2 capture more economical.
- Techno-economic evaluations show that systems and methods in accordance with the subject development to be superior to current Natural Gas Combined Cycle (NGCC) or hydrogen from Steam Methane Reformer (SMR) plants to produce power with CO2 capture.
- NGCC Natural Gas Combined Cycle
- SMR Steam Methane Reformer
- the system's performance is further improved by replacing gas turbines with an advanced hydrogen turbine, for example with a turbine similar to the turbine developed for an Integrated Gasification Combined Cycle (IGCC) plant with CO2 capture.
- IGCC Integrated Gasification Combined Cycle
- a system for power generation includes a compact hydrogen generator.
- the compact hydrogen generator contains a quantity of a sorbent material.
- a feed material to the compact hydrogen generator produces H 2 product and carbon dioxide and the sorbent material absorbs carbon dioxide and forms a used sorbent.
- the system further includes a gas/solids separator connected to the compact hydrogen generator to separate the H 2 product and the used sorbent.
- a calciner connected to the gas/solids separator serves to heat the used sorbent to desorb carbon dioxide from the used sorbent to produce regenerated sorbent.
- a separate stream of CCh can be released from the calciner.
- a recycle line from the calciner to the compact hydrogen generator serves to recycle at least a portion of the regenerated sorbent to the compact hydrogen generator.
- systems for power generation in accordance with the invention use or utilize hydrogen, for example, as fuel.
- hydrogen for example, as fuel.
- systems for power generation using hydrogen fuel can usefully derive such hydrogen fuel from natural gas.
- a system for power generation from natural gas via use of hydrogen fuel in accordance with one embodiment includes a. compact hydrogen generator for generating H 2 product from feed materials including natural gas and water.
- the compact hydrogen generator includes a bubbling fluidized bed of reforming catalyst and a sorbent, e.g., an elutriated sorbent, for the direct catalytic conversion of natural gas and water/steam to H 2 product, wherein the feed materials produce the H 2 product and carbon dioxide and the sorbent material absorbs carbon dioxide and forms a used sorbent.
- a gas/solids separator is connected to the compact hydrogen generator to separate the H 2 product and the used sorbent.
- An indirect calciner is connected to the gas/solids separator to heat the used sorbent to desorb carbon dioxide from the used sorbent to produce regenerated sorbent and a quantity of high purity carbon dioxide.
- a recycle line is included to introduce at least a portion of the regenerated sorbent from the indirect calciner to the compact hydrogen generator.
- the system further includes at least one power generator to receive and utilize at least a portion of the H 2 product from the gas/solids separator to produce power.
- Useful power generators may take various forms including turbines, such as gas or hydrogen turbines, for example, or reciprocating engines, with suitable power generators connected to appropriately produce electrical and/or mechanical (e.g., shaft) power.
- a method for producing power via hydrogen gas involves introducing feed material into a sorbent enhanced reformer to produce H 2 product and carbon dioxide.
- the sorbent enhanced reformer contains a quantity of a sorbent material to absorb carbon dioxide and form a used sorbent.
- the H 2 product and used sorbent from the sorbent enhanced reformer are introduced into a gas/solids separator to separate the H 2 product from the used sorbent. At least a portion of the separated H 2 product is introduced into at least one hydrogen turbine to produce power.
- references to a hydrogen generator as being "compact" are to be understood to refer to a hydrogen generator that is smaller in plant footprint and height as compared to conventional processing and systems for hydrogen generation, such as identified above. This is due to significantly smaller reactor volumes, elimination of components (for example, no water gas shift reactors), and/or reduced equipment size (for example, smaller steam drums and purification systems.
- references to "high purity” hydrogen are to be understood to generally refer to hydrogen purity of greater than 90% by volume on a dry gas basis.
- references to "high purity” carbon dioxide are to be understood to generally refer to carbon dioxide purity of greater than 99% by volume.
- FIG. 1 is a simplified schematic for a system for converting natural gas assets to electric power, hydrogen and carbon dioxide, in accordance with one embodiment of the subject invention.
- FIG. 2 is a simplified schematic showing the principles of operation for a compact hydrogen generator and associated processing in accordance with one embodiment of the subject development.
- FIG. 3 is a simplified schematic for a system for converting natural gas assets to electric power, hydrogen and carbon dioxide, in accordance with another embodiment of the subject development
- FIG. 4 is a simplified schematic for a system for converting natural gas assets to electric power, hydrogen and carbon dioxide, in accordance with another embodiment of the subject development.
- FIG. 5 is a simplified process schematic of a compact hydrogen generator in accordance with one aspect of the subject development. DETAILED DESCRIPTION OF THE INVENTION
- FIG. 1 presents a system, generally designated with the reference numeral 10, for converting natural gas assets to electric power, hydrogen and carbon dioxide, in accordance with one embodiment of the subject development.
- the system 10 includes and utilizes a compact hydrogen generator 12 appropriately joined or connected to a gas turbine or a hydrogen turbine 14 such as to desirably convert natural gas assets to electric power.
- the subject development can desirably be practiced with compact hydrogen generators for a one-step hydrogen generation with inherent separation of carbon dioxide such as can be desirably achieved through the utilization of a bubbling fluidized bed of: 1) a reforming catalyst for the catalytic conversion of methane to the H 2 product and 2) a sorbent (e.g., CaO) for in-situ removal of by-product carbon dioxide thus producing high-purity hydrogen.
- a sorbent e.g., CaO
- FIG. 2 is a simplified schematic showing the principles of operation for a compact hydrogen generator 112.
- such a compact hydrogen generator provides a closed loop operation that produces hydrogen and regenerates the sorbent, i.e., calcium oxide. More particularly, sorption enhanced steam methane reforming hydrogen generation occurs via the following reactions:
- the CaO reactant passes through the catalyst bed, it is entrained with the product H 2 and can be separated using internal cyclones similar to a fluidized catalytic cracking (FCC) operation.
- the CaCCb is then transferred to a second unit operation wherein it is rapidly heated in a gas phase transport calciner to reject the CO2 and produce CaO for reuse in the H 2 generator reactor.
- the entire process is intensified by: (I) the elimination of the syngas production step; (2) avoiding the indirect firing/heat transfer approach used in SMR's; and (3) recapturing the sensible heat from the direct fired calciner.
- use of conventional construction materials, smaller equipment size, and the high purity of the H 2 product make for a significant reduction in plant footprint and capital costs.
- the process is also steam neutral. Cost of H 2 product, the principal figure of merit of a H 2 plant, is thereby significantly less than from SMR.
- processing in accordance with the subject development can drastically simplify process equipment and deliver high efficiency by way of low-cost, steam neutral processing.
- CO2 is captured in the CHG as a separate and concentrated stream at pressure.
- the CHG-produced H 2 can be converted to electric power (using conventional gas turbines or advanced hydrogen turbines).
- the resulting CO2 may also find practical use such as in enhanced oil recovery (EOR) or in co-production of urea in conjunction with use of the H 2 for ammonia production, for example.
- EOR enhanced oil recovery
- natural gas and steam are introduced, such as via respective streams 114 and 116, into a fluidized bed reactor 120 containing reforming catalyst and sorbent material and such as operating at catalytic reforming conditions of 700 °C and 20-35 psig.
- the natural gas and/or the steam may desirably serve to fluidize regenerated sorbent (described more fully below) and deliver such regenerated sorbent to the bottom of the fluidized bed reactor.
- Suitable reforming catalyst materials for use in the practice of the subject development include commercially available Ni on alumina, for example.
- Suitable sorbents for use in the practice of the subject development include natural sorbents such as limestone or dolomite, for example.
- the fluidized bed reactor, the catalyst material and the sorbent are desirably sized, designed and selected such that the used sorbent can elutriate out of the reactor and the catalyst material is sized to not elutriate out of the reactor and thus remains in the fluidized bed.
- a solid sorbent of limestone or dolomite of ⁇ 0.2 mm diameter and a catalyst of Ni on alumina of 2 mm diameter can be used.
- the fluidized bed reactor 120 produces or results in hydrogen generation such as by the above-identified sorption enhanced steam methane reforming hydrogen generation reactions.
- the resulting gases and sorbent (used and unused) from the fluidized bed reactor 120 are conveyed via a line 122 to a gas/solids separator 124 (such as one or more cyclones) to effect separation of gases, shown as a stream 126 (such stream being largely composed of H 2 , but may also contain some CO2, CO, N2, and unreacted CH4, for example) from the solids.
- a gas/solids separator 124 such as one or more cyclones
- the H 2 with or without further processing may be appropriately passed or conveyed (such as signified by the arrow 127) to a selected power generator such as a turbine, reciprocating engine or the like for appropriate power production or for other use or storage, as may be desired and as represented by box 128.
- a selected power generator such as a turbine, reciprocating engine or the like for appropriate power production or for other use or storage, as may be desired and as represented by box 128.
- Such processing costs in the case of an SMR are expensive, having to remove
- the solids may be appropriately conveyed, such as via a lock hopper system 130 or the like to a calciner 132 wherein the used sorbent is indirectly heated such as via an associated heater 133 to a temperature of 8S0-900 °C such as by using PSA off-gas and/or natural gas fuel and oxidizer, e.g., air, to regenerate the sorbent such as by desorbing CO2.
- a calciner 132 wherein the used sorbent is indirectly heated such as via an associated heater 133 to a temperature of 8S0-900 °C such as by using PSA off-gas and/or natural gas fuel and oxidizer, e.g., air, to regenerate the sorbent such as by desorbing CO2.
- the resulting desorbed pure CO2 byproduct is passed from the calciner 132 via a line 134 to storage or disposal 136.
- Such C0 2 may, for example, find use in enhanced oil recovery (EOR), or in co-production of urea in conjunction with use of the H 2 for ammonia production.
- the resulting regenerated sorbent may be appropriately conveyed, such as via a lock hopper system 140 or the like to ultimately be reintroduced into the fluidized bed reactor 120 such as via the natural gas and/or steam feed materials introduced into the reactor.
- the process is thus desirably engineered by combining two unit operations.
- the sorbent e.g., CaO
- the sorbent selectively absorbs carbon dioxide in the reforming (Hydrogen Generator) reactor while being elutriated through the fluidized bed of catalyst, forming hydrogen and CaC03 as a fine solid.
- the hydrogen goes to a selected power generator (e.g., a turbine or other selected power generator) for power production and the Ca CO3 is then separated and sent to a calciner.
- a selected power generator e.g., a turbine or other selected power generator
- the Ca CO3 is then separated and sent to a calciner.
- heat is added to remove the carbon dioxide and returns the regenerated CaO with its latent heat to the reforming reactor.
- the system may also be designed to allow for excess hydrogen production for sale to local markets (e.g., refineries, fuel cell vehicles, etc.).
- a key performance driver for systems and processes in accordance with one aspect of the subject development is the impact on COE, which combines CAPEX and system efficiency.
- the CHG based system squarely addresses at least some of the shortcomings associated the above-identified and described state-of-the-art processing and systems by having carbon dioxide separation inherent to the process. This feature drastically reduces the CAPEX parasitic losses such as required in the regeneration of amine systems for SMR-based systems.
- the CHG's cold gas efficiency is increased due to the lower reactor temperature and due to the Le Chatelier's shift of carbon monoxide to carbon dioxide due to the presence of sorbent.
- CHG overcomes the cost impact due to or associated with scaling limitations of the above-identified and described state-of-the-art processing and systems as the hydrogen production reactor eliminates the complexity of the firebox and reactor tube arrangement.
- the CHG for example, utilizes a bubbling fluidized bed with the sorbent being elutriated through the bed. Since the sorbent provides the necessary heat arising from the recarbonation reaction, the fluidized bed can desirably be housed within a simple pressure vessel.
- the challenges of modularization are minimized or desirably overcome with the CHG technology by eliminating several processes (e.g., water-gas shift and carbon dioxide separation) and greatly simplifying the heat integration.
- the overall size of the CHG system is significantly smaller than commercial SMR system. For example, the elimination of the firebox alone may desirably serve to reduce the hydrogen generator size by 90% or more.
- Such one-step hydrogen generation and inherent separation of carbon dioxide make such systems and processing superior against current technologies for hydrogen production. Further, such compact systems have a wide range of potential applications such as in power, refining, upgrading, transportation using hydrogen, and in various chemical industries.
- natural gas 20 can be pre-heated such as by passage through a heat exchanger 22 to form a heated stream of natural gas 24 (e.g., heated to a temperature of 732 °C) passed through to the compact hydrogen generator 12.
- Water, such as in the form of a stream 30, can be heated, such as by passage through a heat exchanger 32 to form a steam stream 34 (e.g., heated to a temperature of 732 °C) that is also passed through to compact hydrogen generator 12.
- the compact hydrogen generator 12, such as operating such as described above such at a temperature of 700 °C results in an H 2 rich gas stream 40 such as at about 700 °C and such as processed through a heat recovery heat exchanger 42 to form a stream 44 such as having a reduced temperature such as 121 °C.
- the stream 44 can be processed through a pressure swing absorber 46 such as to desirably increase or maximize hydrogen purity and carbon dioxide separation, forming a H 2 product stream 50 of increased purity and a PSA off-gas stream 52 largely containing the non-hydrogen gases.
- H 2 product stream 50 may be diverted, such as represented by the stream 54, for other uses.
- the non-diverted portion of the H 2 product stream 50 can be passed such as via a stream 56 to the hydrogen turbine 14 and such as having air fed thereto such as via a stream 60 such as to produce electric power.
- a flue gas stream 62 such as having a temperature of 562 °C is passed to a heat recovery steam generator 64 such has to desirably recover at least a portion of the heat therefrom and the formation of a stack gas stream 66 for appropriate disposal.
- FIG. 1 shows a stream 70 such as including used sorbent, e.g., sorbent material that absorbed CO2, being passed from the compact hydrogen generator 12 to a calciner 72, preferably an indirect fired calciner. Also introduced to the calciner 72 is a stream 74, such as composed of PSA off-gas and/or natural gas, and a stream 76 of oxidant material, e.g., air.
- the calciner operates at a temperature sufficiently high, e.g., 900 °C, to effect regeneration of the sorbent via desorption of CO2 from the sorbent.
- Regenerated sorbent via a stream 80 is passed from the calciner 72 back to the compact hydrogen generator 12.
- a stream 82 of high purity CO2, such as at a temperature of about 900 °C, may if desired be passed from the calciner 72 to a heat recovery heat exchanger 84 prior to passage of the pure CO2 byproduct stream 86 to disposal or other use or uses.
- a stream 92 of combustion product gases may if desired be passed to a heat recovery heat exchanger 94 prior to passage of a stream 96 of the resulting gases to disposal or other uses.
- the compact hydrogen generator desirably operates at a pressure of at least 35 psia to produce the H 2 product and carbon dioxide.
- the calciner operates at atmospheric pressure to heat the used sorbent to desorb carbon dioxide from the used sorbent to produce regenerated sorbent.
- While the system 10 shown in FIG. 1 and described above relate to an embodiment wherein the H 2 rich gas stream 44 is processed through a pressure swing absorber 46 such as to desirably increase or maximize hydrogen purity and carbon dioxide separation, those skilled in the art and guided by the teachings herein provided will understand and appreciate that the broader practice of the subject development is not necessarily so limited.
- the subject development can be applied via system and processing wherein none or a selected portion of the H 2 product is processed or treated in such, similar or like manner for purposes or increased or maximized hydrogen purity.
- FIG.3 there is shown a schematic for a system, generally designated by the reference numeral 210, for converting natural gas assets to electric power, hydrogen and carbon dioxide, in accordance with another embodiment of the subject development.
- the system 210 is in many respects similar to the system 10 shown in FIG. 1 and described above.
- the system 210 similar to the system 10, includes a hydrogen generator 212 and a hydrogen turbine 214.
- Natural gas 220 and steam 234 are introduced into the hydrogen generator 212.
- natural gas 220 may undergo sulfur removal, such as by treatment through a desulfurizer unit 222, such as known in the art, to remove sulfur from the natural gas prior to passage, such as in a stream 224 to the compact hydrogen generator 212.
- the hydrogen generator 212 produces a stream 237 containing the Hi-rich product and with CO2 desirably in a captured form with the absorbent, e.g., CaC0 3 .
- the stream 237 is passed to a gas/solids separator 239 such as described above.
- the l-b-rich gaseous product stream 240 is passed to the hydrogen turbine 214.
- the rh-rich gaseous product stream 240 may undergo further processing such as described above in reference to the system 10 shown in FIG. 1 prior to passage to the hydrogen turbine 214.
- the turbine 214 may include or have a stream 260 of air or other desired oxidant supplied thereto for use in the production of electric power.
- a flue gas stream 262 is passed to a heat recovery steam generator 264 such has to desirably recover at least a portion of the heat therefrom and the formation of a stack gas stream 266 for appropriate disposal.
- a calciner 272 and indirect heating assembly 273 are schematically shown as adjacent or in contact with each other and with a fuel or natural gas stream 274 and an oxidant or air stream 276 being introduced into the indirect heating assembly 273.
- Material from the calciner 272 is passed as stream 291 to gas/solids separation processing 293 such as to separate the essentially pure desorbed CCh gas from regenerated sorbent solids.
- a stream 286 of high purity CC3 ⁇ 4 is passed to disposal or other uses.
- a stream 280 of regenerated sorbent is passed back to the compact hydrogen generator 12.
- a stream 296 of stack gases resulting from the indirect heating assembly 273 is passed to disposal or other uses, as may be desired or otherwise appropriate.
- FIG.4 there is shown a schematic for a system, generally designated by the reference numeral 310, for converting natural gas assets to electric power, hydrogen and carbon dioxide, in accordance with another embodiment of the subject development.
- the system 310 is in many respects similar to the systems 10 and 210 shown in FIG. 1 and FIG. 3, respectively and described above.
- the system 310 includes a compact hydrogen generator 312 and a power generator 314, e.g., a hydrogen turbine.
- Streams of natural gas 320 and water, e.g., steam, 334 are introduced into the hydrogen generator 312.
- the compact hydrogen generator 312 produces a stream 340 containing the H 2 -rich product and a stream 370 containing used sorbent, e.g., CO2 desirably in a captured form with the absorbent, e.g., CaC03.
- the H 2 -rich product stream 340 in whole or in part, can be appropriately supplied or provided to the power generator 314 to produce power.
- Suitable power generators in the broader practice of the invention encompass and may include turbines (including gas and hydrogen turbines), reciprocating engines, and the like such as may be suitably be connected to produce electrical and/or mechanical (i.e., shaft) power.
- a portion of the H 2 product stream 340 can be diverted, such as represented by the stream 3S3.
- a portion of the H 2 product stream 340 can be diverted, such as represented by the stream 3S3.
- a portion of the H 2 product stream 340 can be diverted, such as represented by the stream 3S3.
- H 2 product storage conditions include: a pressure of greater than 2000 psia and up to 10,000 psia and ambient temperature, with a preferred pressure in a range of 3000-7000 psia or 4000-6000 psia, e.g., 5000 psia, and ambient temperature.
- the storage vessel 361 can provide for temporary storage of H 2 such that, for example, at times of high power demands, including peak load periods, H 2 from the storage vessel 461 can be provided to the hydrogen turbine 314, such as to supplement the H 2 introduced to the hydrogen turbine 314 directly from the compact hydrogen generator 312.
- the H 2 stored or contained within the storage vessel 361 can, if desired, be provided or appropriately supplemented from other sources such as shown as 363, such as H 2 production from renewable, for example.
- the H 2 stored or contained within the storage vessel 361 can, if desired, be passed or conveyed, such as represented by arrow 365, for alternative uses or processing.
- alternative uses or processing include without limitation ammonia production, refining processing, hythane manufacture and production, fuel cell power applications, and motor vehicle energy supply, for example.
- the stream 370 such as including used sorbent, e.g., sorbent material that absorbed C0 2 , is passed from the compact hydrogen generator 312 to the calciner 372, preferably operating at atmospheric pressure to heat the used sorbent to desorb carbon dioxide from the used sorbent to produce regenerated sorbent
- the calciner is an indirect heat calciner as such a calciner can desirably minimize and preferably avoid mixing or mingling of chemical species such as CO, N 2 and the like and such as may be produced or result from combustion processing such as combustion processing and such as may undesirably impact the purity of the CO2 produced or resulting from practice of the subject development.
- the calciner operates at a temperature sufficiently high, e.g.,
- Regenerated sorbent via a stream 380 is passed from the calciner 372 back to the compact hydrogen generator 312.
- a stream 382 of high purity CO2 is passed from the calciner 372 for subsequent processing, such as including heat recovery such as described above, and/or conveyance for other uses such as in one or more of enhanced oil recovery (EOR), urea production and processing, beverage production, and as or for building blocks for solid carbon materials such as plastics etc., for example.
- EOR enhanced oil recovery
- FIG. 5 there is shown a simplified process schematic of a compact hydrogen generator, generally designated by the reference numeral 410, and in accordance with one aspect of the subject development.
- the compact hydrogen generator fluidized catalyst bed reactor 414 desirably forms or constitutes a sorbent enhanced reformer such as containing 1) reforming catalyst for the catalytic conversion of methane to desired H 2 product and 2) a quantity of a sorbent material to absorb carbon dioxide such as formed during such reforming processing.
- the sorbent e.g., CaO
- used preferably has a fine particle size and is elutriated through the catalyst bed during which it absorbs or otherwise binds with or picks-up the C0 2 such as CaO converting to calcium carbonate (CaC0 3 ).
- the catalyst material and the sorbent within the fluidized bed reactor are desirably designed and selected such that the used sorbent can elutriate out of the reactor and the catalyst material is sized to not elutriate out of the reactor and thus remains in the fluidized bed.
- the H 2 product and the eluted solid used sorbent as represented by the arrow 416 are passed from the H 2 generator fluidized bed sorbent enhanced reformer reactor 414 to an appropriate gas/solids separator 420, in this case shown as a cyclone.
- a primarily H 2 product gas stream 422 is shown exiting from the gas/solids separator 420.
- H 2 product can be subsequently appropriately further processed, stored, or used such as in conjunction with a H 2 turbine.
- a used sorbent-containing solids stream 424 exiting from the gas/solids separator 420 is subsequently passed, such as via a standpipe 426 and slide gate 430 combination, to a calciner 432.
- the calciner 432 is also provided with combustion products, such as from a burner 434, to heat the used sorbent to desorb carbon dioxide from the used sorbent to produce regenerated sorbent.
- An effluent stream 436 from the calciner 432 is passed to a gas/solids separator 440, for example, a cyclone, to effect separation of gaseous materials such as C0 2 and N 2 , for example, from the now regenerated sorbent.
- a gas/solids separator 440 for example, a cyclone
- a gaseous materials stream 442, shown as exiting from the gas/solids separator 440, can be passed for subsequent appropriate further processing, storage, use, or disposal, as may be desired.
- a solids materials stream 444 composed of the regenerated sorbent and shown as exiting from the gas/solids separator 440, can be passed to the educator 412 for subsequent conveyance via the steam and/or natural gas or methane introduced therein to the compact hydrogen generator fluidized catalyst bed reactor 414.
- processing scheme 410 shown in FIG.5 utilizes a direct fired calciner
- an indirect fired calciner such as described above and shown in other embodiments can be used, particularly in those instances wherein the purity of resulting C(3 ⁇ 4 is important or critical.
- a modular heat engine with inherent carbon dioxide separation desirably meets an objective of developing a heat engine that promotes clean and efficient use of stranded fuel assets.
- natural gas may be cleanly and efficiently converted to electricity, while the carbon dioxide may be used nearby such as for enhanced oil and gas recovery, for example.
- stranded coal may be utilized in modular integrated gasification combined cycle (IGCC) applications.
- IGCC modular integrated gasification combined cycle
- contemplated and herein encompassed and included applications for the subject development including the modular heat engine include the sale of excess hydrogen for use in fuel cell vehicles, or for oil refining/upgrading and fertilizer production.
- the hydrogen may also be blended with natural gas such as to make lower carbon intensity hythane.
- the resulting or produced high purity carbon dioxide can, as may be desired, be sold to or otherwise find application in other industries such as the urea and beverage industries, for example.
Abstract
Description
Claims
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PCT/US2018/017578 WO2018148514A1 (en) | 2017-02-09 | 2018-02-09 | Power generation using hydrogen fuel with economical carbon dioxide capture |
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WO2023016862A1 (en) | 2021-08-09 | 2023-02-16 | Zeg Power As | Hydrogen production system |
US20230234839A1 (en) * | 2022-01-25 | 2023-07-27 | Wormser Energy Solutions, Inc. | Hydrogen and Power Production with Sorbent Enhanced Reactor Steam Reformer and Carbon Capture |
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WO2010045232A2 (en) * | 2008-10-13 | 2010-04-22 | The Ohio State University | Calcium looping process for high purity hydrogen production intergrated with capture of carbon dioxide, sulfur and halides |
US8752390B2 (en) * | 2010-07-13 | 2014-06-17 | Air Products And Chemicals, Inc. | Method and apparatus for producing power and hydrogen |
US9093681B2 (en) * | 2010-12-15 | 2015-07-28 | Intelligent Energy Inc. | Hydrogen generation having CO2 removal with steam reforming |
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