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公开(公告)号：US11560307B2
公开(公告)日：2023-01-24
申请号：US16838654
申请日：2020-04-02
Inventor： Everett J. O'Neal , Anastasios I. Skoulidas , Joseph E. Gatt
Abstract: Systems and methods are provided for hydrogenation of CO2 in a reverse flow reactor environment via a reverse water gas shift reaction. A reverse flow reactor environment is suitable for performing endothermic reactions at high temperatures, where a reactant flow is passed into the reactor in a first portion of the cycle in a first flow direction while a combustion or heating flow is passed into the reactor during a second portion of the reaction cycle from the opposite direction. This can allow for efficient heating of surfaces within the reactor to provide heat for the endothermic reverse water gas shift reaction while reducing or minimizing incorporation of combustion products into the desired reaction products.
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公开(公告)号：US11851328B2
公开(公告)日：2023-12-26
申请号：US16838399
申请日：2020-04-02
Inventor： Everett J. O'Neal , Anastasios I. Skoulidas , Zhiyan Wang
IPC: C01B3/38 , B01J8/04 , B01D53/047 , B01J19/24 , B01J38/40 , C01B3/48 , C01B3/56 , B01J12/00 , B01J23/34 , B01J23/92 , B01J35/04 , B01J38/14 , C01B3/40
CPC classification number: C01B3/384 , B01D53/047 , B01J8/0492 , B01J8/0496 , B01J12/007 , B01J19/2465 , B01J23/34 , B01J23/92 , B01J35/04 , B01J38/14 , B01J38/40 , C01B3/40 , C01B3/48 , C01B3/56 , B01D2256/16 , B01D2257/502 , B01D2257/504 , B01D2257/80 , C01B2203/0233 , C01B2203/0283 , C01B2203/042 , C01B2203/0475 , C01B2203/0822 , C01B2203/1094 , C01B2203/1241
Abstract: Systems and methods are provided for using a high heat capacity gas as at least a portion of the diluent during the regeneration step of a reverse flow reactor process. Instead of using nitrogen or air as the primary diluent gas, CO2 and/or H2O can be added as diluent gas for the regeneration step in the reaction cycle. Increasing the heat capacity of the diluent gas provides a reduction in the peak temperature within the reactor relative to the amount of fuel combusted during regeneration. This can allow for a reduction in the volume of diluent used during regeneration and/or an increase in the amount of fuel used. Reducing the volume of diluent can reduce the pressure drop during regeneration, which can provide a corresponding reduction in the amount of compression required for recycle of the diluent. Increasing the amount of fuel can allow for a corresponding increase in the amount of endothermic reaction performed during the reaction step.
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公开(公告)号：US11325106B2
公开(公告)日：2022-05-10
申请号：US16512688
申请日：2019-07-16
Inventor： Matthew S. Ide , Changmin Chun , Anastasios I. Skoulidas
IPC: B01J21/04 , B01J21/06 , B01J21/08 , B01J21/10 , B01J21/12 , B01J21/14 , B01J23/70 , B01J23/72 , B01J23/74 , B01J23/75 , B01J23/755 , B01J23/78 , B01J23/83 , B01J23/86 , B01J23/889 , B01J35/00 , B01J35/04 , B01J35/10 , B01J37/00 , B01J37/02 , B01J37/14 , B01J37/16 , C10G35/06 , C10J3/72
Abstract: Ceramic compositions with catalytic activity are provided, along with methods for using such catalytic ceramic compositions. The ceramic compositions correspond to compositions that can acquire increased catalytic activity by cyclic exposure of the ceramic composition to reducing and oxidizing environments at a sufficiently elevated temperature. The ceramic compositions can be beneficial for use as catalysts in reaction environments involving swings of temperature and/or pressure conditions, such as a reverse flow reaction environment. Based on cyclic exposure to oxidizing and reducing conditions, the surface of the ceramic composition can be converted from a substantially fully oxidized state to various states including at least some dopant metal particles supported on a structural oxide surface.
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公开(公告)号：US20250132363A1
公开(公告)日：2025-04-24
申请号：US18918230
申请日：2024-10-17
Inventor： Anastasios I. Skoulidas , Gregory R. Johnson , Clay R. Sutton , Lu Han
IPC: H01M8/0612 , H01M8/04014 , H01M8/04089 , H01M8/04701 , H01M8/04746 , H01M8/14
Abstract: Systems and methods are provided for operating molten carbonate fuel cells to produce increased amounts of H2 in the anode effluent while still maintaining operation of the cell within conventional operation boundaries, such as having a temperature differential between the cathode input flow and the cathode effluent of 35° C. or more, with the cathode effluent being hotter than the cathode input flow. This temperature differential between the cathode input flow and the cathode effluent while still producing excess hydrogen is achieved in part by a) passing an input flow containing hydrocarbons and/or reformable fuel into an external reformer, b) reforming 20 vol % or more of the hydrocarbons and/or reformable fuel in the external reformer prior to c) passing the partially reformed input flow into a fuel cell or fuel cell stack where additional reforming is performed in the anode(s) and/or in a reforming element in the fuel cell stack.
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Patent Agency Ranking
公开(公告)号：US20250096294A1
公开(公告)日：2025-03-20
申请号：US18883198
申请日：2024-09-12
Inventor： Aaron SATTLER , Matthew S. Mettler , Anastasios I. Skoulidas , Clay R. Sutton , Kenneth C.H. Kar
IPC: H01M8/0668 , H01M8/04014 , H01M8/0612 , H01M8/14
Abstract: Systems and methods are provided for using molten carbonate fuel cells (MCFCs) to reduce, minimize, and/or avoid CO2 emissions in a marine vessel environment. The systems and methods can include operation of MCFCs on a marine vessel under high fuel utilization conditions in order to provide power and capture CO2. The high fuel utilization conditions can allow for mitigation of CO2 over extended periods of time in spite of the challenges of performing CO2 mitigation in a potentially isolated environment such as a marine vessel. Additionally, the high fuel utilization can also reduce or minimize exhaust of fuels, such as methane, to the environment.
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公开(公告)号：US11746011B2
公开(公告)日：2023-09-05
申请号：US16838477
申请日：2020-04-02
Inventor： Everett J. O'Neal , Anastasios I. Skoulidas
CPC classification number: C01B3/38 , B01J8/0438 , B01J19/0013 , B01J19/2445 , B01J2219/00038 , B01J2219/00157 , C01B2203/0233 , C01B2203/0811 , C01B2203/1241
Abstract: Systems and methods are provided for improving the operation of groups of reverse flow reactors by operating reactors in a regeneration portion of the reaction cycle to have improved flue gas management. The flue gas from reactor(s) at a later portion of the regeneration step can be selectively used for recycle back to the reactors as a diluent/heat transport fluid. The flue gas from a reactor earlier in a regeneration step can be preferentially used as the gas vented from the system to maintain the desired volume of gas within the system. This results in preferential use of higher temperature flue gas for recycle and lower temperature flue gas for venting from the system. This improved use of flue gas within a reaction system including reverse flow reactors can allow for improved reaction performance while reducing or minimizing heat losses during the regeneration portion of the reaction cycle.
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公开(公告)号：US11465903B2
公开(公告)日：2022-10-11
申请号：US16838793
申请日：2020-04-02
Inventor： Everett J. O'Neal , Brian M. Weiss , Anastasios I. Skoulidas
IPC: C01B3/38 , B01J8/04 , B01D53/047 , B01J19/24 , B01J38/40 , C01B3/48 , C01B3/56 , B01J12/00 , B01J23/34 , B01J23/92 , B01J35/04 , B01J38/14 , C01B3/40
Abstract: Systems and methods are provided for using oxycombustion to provide heat within a reverse flow reactor environment. The oxygen for the oxycombustion can be provided by oxygen stored in an oxygen storage component in the reactor. By using an oxygen storage component to provide the oxygen for combustion during the regeneration step, heat can be added to a reverse flow reactor while reducing or minimizing addition of diluents and while avoiding the need for an air separation unit. As a result, a regeneration flue gas can be formed that is substantially composed of CO2 and/or H2O without requiring the additional cost of creating a substantially pure oxygen-containing gas flow.
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公开(公告)号：US20240140792A1
公开(公告)日：2024-05-02
申请号：US18499472
申请日：2023-11-01
Inventor： Everett J. O'NEAL , David C. Dankworth , Lu Han , Sarah E. Feicht , Anastasios I. Skoulidas
CPC classification number: C01B3/26 , B01J19/0066 , B01J19/2485 , C01B2203/0238 , C01B2203/06 , C01B2203/1235
Abstract: Systems and methods are provided for performing both reforming and partial oxidation as part of the reaction step of a reaction cycle in a cyclic reaction environment such as a reverse flow reaction environment, where heat is provided by direct heating during a regeneration step. In some aspects, performing a combination of reforming and partial oxidation can allow for higher conversion of hydrocarbons than reforming alone while reducing or minimizing the peak temperatures within the cyclic reaction environment. In some aspects, performing both reforming and partial oxidation can also allow for an improved molar ratio of H2 to CO in the resulting effluent from the conversion reaction (relative to partial oxidation) while still maintaining high total conversion.
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公开(公告)号：US11559780B2
公开(公告)日：2023-01-24
申请号：US16838548
申请日：2020-04-02
Inventor： Everett J. O'Neal , Anastasios I. Skoulidas
Abstract: Systems and methods are provided for improving the operation of groups of reverse flow reactors by operating reactors in a regeneration portion of the reaction cycle to have improved flue gas management. The flue gas from reactor(s) at a later portion of the regeneration step can be selectively used for recycle back to the reactors as a diluent/heat transport fluid. The flue gas from a reactor earlier in a regeneration step can be preferentially used as the gas vented from the system to maintain the desired volume of gas within the system. This results in preferential use of higher temperature flue gas for recycle and lower temperature flue gas for venting from the system. This improved use of flue gas within a reaction system including reverse flow reactors can allow for improved reaction performance while reducing or minimizing heat losses during the regeneration portion of the reaction cycle.
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