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公开(公告)号：US20200317515A1
公开(公告)日：2020-10-08
申请号：US16838399
申请日：2020-04-02
Applicant: ExxonMobil Research and Engineering Company
Inventor： Everett J. O'Neal , Anastasios I. Skoulidas , Zhiyan Wang
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：US20220112432A1
公开(公告)日：2022-04-14
申请号：US17496644
申请日：2021-10-07
Applicant: ExxonMobil Research and Engineering Company
Inventor： Wesley Sattler , Keith R. Hajkowski , Changmin Chun , Partha Nandi , Vera Grankina , Joseph E. Gatt , Ning Ma , Anastasios Skoulidas , William R. Gunther , Everett J. O'Neal
Abstract: Systems and methods are provided for using size-reversing materials in vessels where direct heating is used to at least partially provide heat for reforming reactions under cyclic reforming conditions. An example of a size-reversing material is the combination of NiO and Al2O3. It has been discovered that size-reversing materials can undergo a phase transition that can assist with re-dispersion of metal at elevated temperatures. This can assist with maintaining catalytic activity for reforming over longer time periods in the presence of cyclic reforming conditions.
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公开(公告)号：US20210370261A1
公开(公告)日：2021-12-02
申请号：US17190478
申请日：2021-03-03
Applicant: ExxonMobil Research and Engineering Company
Inventor： Everett J. O'Neal
Abstract: The present disclosure relates to methods and systems for treating a fluid produced from a biorefinery to remove contaminants, such as metals and sulfur therefrom. Biomass is pyrolysed and activated to form activated carbon used to remove such contaminants. The fluid produced from the biorefinery may be one or more of a biofuel, a biogas, and wastewater.
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Patent Agency Ranking
公开(公告)号：US20210340033A1
公开(公告)日：2021-11-04
申请号：US17168112
申请日：2021-02-04
Applicant: ExxonMobil Research and Engineering Company
Inventor： Gregory R. Johnson , Everett J. O'Neal , Sarah E. Feicht
Abstract: The present disclosure relates to methods and systems for algae cultivation including the integration of electrochemical carbonate production for enhancing algae growth. More particularly, the present disclosure relates to methods and systems for producing a sodium hydroxide from brine using an electrochemical cell, contacting the sodium hydroxide stream with a CO2 gas sweep and producing a carbonate stream, and cultivating an algae slurry in a cultivation vessel comprising at least a portion of the carbonate stream.
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公开(公告)号：US20210108165A1
公开(公告)日：2021-04-15
申请号：US17067948
申请日：2020-10-12
Applicant: ExxonMobil Research and Engineering Company
Inventor： Samantha J. Reuter , Rachel G. Munson , Patrick L. Hanks , Everett J. O'Neal , Mark A. Deimund , Sarah E. Feicht
Abstract: A system for growing algae for biofuel production includes a bioreactor configured to contain an algae slurry, an algae-water separator fluidly coupled to the bioreactor to receive and separate the algae slurry into algae and separated water, and an organics treatment system that receives a portion of the separated water and is configured to reduce a concentration of organics in the portion of the separated water. A recycle line conveys the portion of the separated water back to the bioreactor following processing in the organics treatment system, wherein the portion of the separated water is recycled and forms part of the algae slurry reducing the raw water demand of the bioreactor.
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公开(公告)号：US20200338522A1
公开(公告)日：2020-10-29
申请号：US16838548
申请日：2020-04-02
Applicant: ExxonMobil Research and Engineering Company
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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公开(公告)号：US20200331751A1
公开(公告)日：2020-10-22
申请号：US16838856
申请日：2020-04-02
Applicant: ExxonMobil Research and Engineering Company
Inventor： Everett J. O'Neal , Anastasios I. Skoulidas , Zhiyan Wang
Abstract: Systems and methods are provided for performing hydrocarbon reforming within a reverse flow reactor environment (or another reactor environment with flows in opposing directions) while improving management of CO2 generated during operation of the reactor. The improved management of CO2 is achieved by making one or more changes to the operation of the reverse flow reactor. The changes can include using an air separation unit to provide an oxygen source with a reduced or minimized content of nitrogen and/or operating the reactor at elevated pressure during the regeneration stage. By operating the regeneration at elevated pressure, a regeneration flue gas can be generated that is enriched in CO2 at elevated pressure. The CO2-enriched stream can include primarily water as a contaminant, which can be removed by cooling while substantially maintaining the pressure of the stream. This can facilitate subsequent recovery and use of the CO2.
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公开(公告)号：US20200176800A1
公开(公告)日：2020-06-04
申请号：US16696821
申请日：2019-11-26
Inventor： Everett J. O'Neal , Lu Han , Carla S. Pereira , Rodrigo F. Blanco Gutierrez , Timothy M. Healy , Carl A. Willman , Hossein Ghezel-Ayagh , Frank J. Dobek, JR.
IPC: H01M8/14 , H01M8/0612
Abstract: A reforming element for a molten carbonate fuel cell stack and corresponding methods are provided that can reduce or minimize temperature differences within the fuel cell stack when operating the fuel cell stack with enhanced CO2 utilization. The reforming element can include at least one surface with a reforming catalyst deposited on the surface. A difference between the minimum and maximum reforming catalyst density and/or activity on a first portion of the at least one surface can be 20% to 75%, with the highest catalyst densities and/or activities being in proximity to the side of the fuel cell stack corresponding to at least one of the anode inlet and the cathode inlet.
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