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公开(公告)号：US20210331918A1
公开(公告)日：2021-10-28
申请号：US17236418
申请日：2021-04-21
Applicant: ExxonMobil Research and Engineering Company
Inventor： Ramesh Gupta , Hugo S. Caram , Anjaneya S. Kovvali , Sumathy Raman , David C. Dankworth
Abstract: Systems and methods are provided for conversion of methane and/or other hydrocarbons to hydrogen by pyrolysis while reducing or minimizing production of carbon oxides. The conversion of hydrocarbons to hydrogen is performed in one or more pyrolysis or conversion reactors that contain a plurality of sequential fluidized beds. The fluidized beds are arranged so that the coke particles forming the fluidized bed move in a counter-current direction relative to the gas phase flow of feed (e.g., methane) and/or product (H2) in the fluidized beds. By using a plurality of sequential fluidized beds, the heat transfer and management benefits of fluidized beds can be realized while also at least partially achieving the improved reaction rates that are associated with a plug flow or moving bed reactor.
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公开(公告)号：US10677160B2
公开(公告)日：2020-06-09
申请号：US15273800
申请日：2016-09-23
Applicant: ExxonMobil Research and Engineering Company
Inventor： Narasimhan Sundaram , Ramesh Gupta , Hans Thomann , Hugo S. Caram , Loren K. Starcher , Franklin F. Mittricker , Simon C. Weston , Scott J. Weigel
IPC: F02C3/34 , F02C6/04 , B01D53/047 , F01K17/04 , F02C9/16
Abstract: Systems and methods are provided for combined cycle power generation while reducing or mitigating emissions during power generation. Recycled exhaust gas from a power generation combustion reaction can be separated using a swing adsorption process so as to generate a high purity CO2 stream while reducing/minimizing the energy required for the separation and without having to reduce the temperature of the exhaust gas. This can allow for improved energy recovery while also generating high purity streams of carbon dioxide and nitrogen.
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公开(公告)号：US20200071164A1
公开(公告)日：2020-03-05
申请号：US16540300
申请日：2019-08-14
Applicant: ExxonMobil Research and Engineering Company
Inventor： Ramesh Gupta , Sumathy Raman , Hugo S. Caram , David C. Dankworth
Abstract: Systems and methods for molten media pyrolysis for the conversion of methane into hydrogen and carbon-containing particles are disclosed. The systems and methods include the introduction of seed particles into the molten media to facilitate the growth of larger, more manageable carbon-containing particles. Additionally or alternatively, the systems and methods can include increasing the residence time of carbon-containing particles within the molten media to facilitate the growth of larger carbon-containing particles.
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Patent Agency Ranking
公开(公告)号：US10259711B2
公开(公告)日：2019-04-16
申请号：US15465666
申请日：2017-03-22
Applicant: ExxonMobil Research and Engineering Company
Inventor： Ramesh Gupta , Robert A. Johnson , Thomas N. Anderson , Harry W. Deckman , Peter I. Ravikovitch
IPC: B01D53/047 , B01D53/06 , C01B13/02
Abstract: Systems and methods are provided for separating oxygen from air using a sorption/desorption cycle that includes a reduced or minimized difference between the maximum and minimum pressures involved in the sorption/desorption cycle. The reduced or minimized difference in pressures can be achieved in part by using valves that can allow for commercial scale flow rates while avoiding large pressure drops for flows passing through the valves. A rotary wheel adsorbent is an example of a system that can allow for a sorption/desorption cycle with reduced and/or minimized pressure drops across valves associated with the process. Stationary adsorbent beds can also be used in combination with commercially available valves that have reduced and/or minimized pressure drops.
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公开(公告)号：US20200071162A1
公开(公告)日：2020-03-05
申请号：US16540277
申请日：2019-08-14
Applicant: ExxonMobil Research and Engineering Company
Inventor： Ramesh Gupta , Sumathy Raman , Hugo S. Caram , David C. Dankworth
Abstract: Systems and methods for molten media pyrolysis for the conversion of methane into hydrogen and carbon-containing particles are disclosed. The systems and methods include the introduction of seed particles into the molten media to facilitate the growth of larger, more manageable carbon-containing particles. Additionally or alternatively, the systems and methods can include increasing the residence time of carbon-containing particles within the molten media to facilitate the growth of larger carbon-containing particles.
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公开(公告)号：US09968882B2
公开(公告)日：2018-05-15
申请号：US15274382
申请日：2016-09-23
Applicant: ExxonMobil Research and Engineering Company
Inventor： Simon C. Weston , Mobae Afeworki , Bhupender S. Minhas , Ramesh Gupta , Hugo S. Caram , Manoj K. Chaudhury , Hans Thomann , Hilda B. Vroman , Meghan Nines
CPC classification number: B01D53/0462 , B01D53/0423 , B01D53/0446 , B01D53/1475 , B01D2253/108 , B01D2253/204 , B01D2253/25 , B01D2257/504 , B01J20/18 , B01J20/22 , B01J20/226 , B01J20/262 , B01J20/3204 , B01J20/3206 , B01J20/3214 , B01J20/3246 , B01J20/3272 , Y02C10/08
Abstract: A heat transfer fluid can be used as part of a multi-phase adsorption environment to allow for improved separations of gas components using a solid adsorbent. The heat transfer fluid can reduce or minimize the temperature increase of the solid adsorbent that occurs during an adsorption cycle. Reducing or minimizing such a temperature increase can enhance the working capacity for an adsorbent and/or enable the use of adsorbents that are not practical for commercial scale adsorption using conventional adsorption methods. The multi-phase adsorption environment can correspond to a trickle bed environment, a slurry environment, or another convenient environment where at least a partial liquid phase of a heat transfer fluid is present during gas adsorption by a solid adsorbent.
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公开(公告)号：US20220185670A1
公开(公告)日：2022-06-16
申请号：US17124113
申请日：2020-12-16
Applicant: ExxonMobil Research and Engineering Company
Inventor： Ramesh Gupta , Sumathy Raman , Amrit Jalan , Hugo S. Caram , David C. Dankworth
IPC: C01B32/162 , B01J6/00
Abstract: Systems and methods are provided for production of carbon nanotubes and H2 using a reaction system configuration that is suitable for large scale production. In the reaction system, a substantial portion of the heat for the reaction can be provided by using a heated gas stream. Optionally, the heated gas stream can correspond to a heated H2 gas stream. By using a heated gas stream, when the catalyst precursors for the floating catalyst—chemical vapor deposition (FC-CVD) type catalyst are added to the gas stream, the gas stream can be at a temperature of 1000° C. or more. This can reduce or minimize loss of catalyst precursor material and/or deposition of coke on sidewalls of the reactor. Additionally, a downstream portion of the reactor can include a plurality of flow channels of reduced size that are passed through a heat exchanger environment, such as a shell and tube heat exchanger. This can provide cooling of the gas flow after catalyst formation to allow for carbon nanotube formation, while also reducing the Reynolds number of the flow sufficiently to provide laminar flow within the region where carbon nanotubes are formed.
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公开(公告)号：US20170305744A1
公开(公告)日：2017-10-26
申请号：US15465666
申请日：2017-03-22
Applicant: ExxonMobil Research and Engineering Company
Inventor： Ramesh Gupta , Robert A. Johnson , Thomas N. Anderson , Harry W. Deckman , Peter I. Ravikovitch
CPC classification number: C01B13/027 , B01D53/047 , B01D53/06 , B01D2253/108 , B01D2253/342 , B01D2256/12 , B01D2257/102 , B01D2257/40 , B01D2259/4003 , B01D2259/40052 , C01B2210/0018 , C01B2210/0046 , C01P2006/80
Abstract: Systems and methods are provided for separating oxygen from air using a sorption/desorption cycle that includes a reduced or minimized difference between the maximum and minimum pressures involved in the sorption/desorption cycle. The reduced or minimized difference in pressures can be achieved in part by using valves that can allow for commercial scale flow rates while avoiding large pressure drops for flows passing through the valves. A rotary wheel adsorbent is an example of a system that can allow for a sorption/desorption cycle with reduced and/or minimized pressure drops across valves associated with the process. Stationary adsorbent beds can also be used in combination with commercially available valves that have reduced and/or minimized pressure drops.
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