-
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.
-
公开(公告)号：US10570342B2
公开(公告)日：2020-02-25
申请号：US15606026
申请日：2017-05-26
Applicant: ExxonMobil Research and Engineering Company
Inventor： Patrick L. Hanks , Anjaneya S. Kovvali , David T. Ferrughelli , Steven Pyl , Sumathy Raman
Abstract: Systems and methods are provided for solvent deasphalting of steam cracker tar. The resulting deasphalted oil produced from the steam cracker tar can then be hydroprocessed, such as hydrotreated and/or hydrocracked in a fixed bed reactor. The solvent deasphalting can correspond to a mild or trim deasphalting or can correspond to solvent deasphalting at higher solvent to oil ratios. Performing a trim deasphalting can reduce or minimize the amount of deasphalting residue that is formed as a product from the deasphalting process.
-
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.
-
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.
-
公开(公告)号：US20190352572A1
公开(公告)日：2019-11-21
申请号：US15981063
申请日：2018-05-16
Applicant: ExxonMobil Research and Engineering Company
Inventor： Tien V. Le , Walter E. Dubois , Brenda A. Raich , Bing Du , Sumathy Raman , Gawain J. Lau
Abstract: Systems and methods are provided for adding a heated stream of light hydrocarbons to a fluidized coking environment to improve liquid product yield and/or reduce coke production. The light hydrocarbons can correspond to C1-C10 hydrocarbons and/or hydrogen. The light hydrocarbons can be heated so that the light hydrocarbons are exposed to an activation temperature of 535° C. to 950° C. and/or an activation temperature higher than the temperature in the coking zone by 50° C. or more for an activation time prior to entering the fluidized coking reactor and/or the coking zone in the fluidized coking environment.
-
Patent Agency Ranking
公开(公告)号：US20190278880A1
公开(公告)日：2019-09-12
申请号：US16295004
申请日：2019-03-07
Applicant: ExxonMobil Research and Engineering Company
Inventor： Ning Ma , Niranjan A. Subrahmanya , Wei D. Liu , Sumathy Raman
Abstract: This disclosure generally relates to a methodology of effectively designing and/or discovering new materials based on microstructure, and more particularly, to designing and/or discovering new materials by combining material fundamentals and experimental data. The methodology disclosed herein provides cost-effective and time-effective solutions for material design that combine the benefits of both of the two major computational material design approaches: physics-based and data-driven computer models.
-
公开(公告)号：US10093597B1
公开(公告)日：2018-10-09
申请号：US15886153
申请日：2018-02-01
Applicant: ExxonMobil Research and Engineering Company
Inventor： Changyub Paek , Michael P. Lanci , Randall D. Partridge , Allen W. Burton , Peter I. Ravikovitch , Sumathy Raman
Abstract: In a process for separating one or more 3,3′-, 3,4′- and 4,4′-dimethyl biphenyl isomers, a feed comprising the isomers is contacted with an adsorbent containing a zeolite having a largest diffuse along dimension of at least 4 Angstroms. The adsorbents provide selective adsorption of 4,4′-dimethyl biphenyl.
-
公开(公告)号：US10851036B2
公开(公告)日：2020-12-01
申请号：US16203920
申请日：2018-11-29
Applicant: ExxonMobil Research and Engineering Company
Inventor： Partha Nandi , Steven L. Suib , Sumathy Raman
Abstract: Systems and methods are provided for direct methane conversion to methanol. The methods can include exposing methane to an oxidant, such as O2, in a solvent at conditions that are substantially supercritical for the solvent while having a temperature of about 310° C. or less, or about 300° C. or less, or about 290° C. or less. The solvent can correspond to an electron donor solvent that, when in a supercritical state, can complex with O2. By forming a complex with the O2, the supercritical electron donor solvent can facilitate conversion of methane to methanol at short residence times while reducing or minimizing further oxidation of the methanol to other products.
-
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.
-
公开(公告)号：US20170362514A1
公开(公告)日：2017-12-21
申请号：US15606026
申请日：2017-05-26
Applicant: ExxonMobil Research and Engineering Company
Inventor： Patrick L. Hanks , Anjaneya S. Kovvali , David T. Ferrughelli , Steven Pyl , Sumathy Raman
CPC classification number: C10G21/003 , C10G21/14 , C10G49/002 , C10G67/0454
Abstract: Systems and methods are provided for solvent deasphalting of steam cracker tar. The resulting deasphalted oil produced from the steam cracker tar can then be hydroprocessed, such as hydrotreated and/or hydrocracked in a fixed bed reactor. The solvent deasphalting can correspond to a mild or trim deasphalting or can correspond to solvent deasphalting at higher solvent to oil ratios. Performing a trim deasphalting can reduce or minimize the amount of deasphalting residue that is formed as a product from the deasphalting process.
-
-
-
-
-
-
-
-
-
Search Results
10
records
(took 0.022 seconds)
