公开(公告)号：US20240425759A1

公开(公告)日：2024-12-26

申请号：US18274021

申请日：2022-01-27

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Guang Cao ,  James R. Bielenberg ,  August W. Bosse ,  David C. Dankworth ,  Sumathy Raman ,  Michael Siskin

IPC: C10G1/08 ,  C01B3/24

Abstract: Methods are provided for upgrading of pyrolysis carbon in order to allow for conversion of the pyrolysis carbon into higher value products. Instead of attempting to convert methane into a high value carbon product (such as carbon nanotubes) and H2 in a single reaction step, pyrolysis conditions can be used to form H2 and pyrolysis carbon. The pyrolysis carbon can then be treated in order to convert the pyrolysis carbon (H to C atomic ratio of less than 0.20) into a product with a higher hydrogen content (H to C atomic ratio of 0.25-0.9 or 2.0-7.0 wt % H). The treatment can correspond to exposing the pyrolysis carbon with hydrogen in the presence of a catalyst, exposing the pyrolysis carbon to conditions for alkylation, or a sequential combination thereof. This can convert the pyrolysis carbon into heavy hydrocarbon products that are resin-like solids at room temperature.

公开(公告)号：US11591212B2

公开(公告)日：2023-02-28

申请号：US16540277

申请日：2019-08-14

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Ramesh Gupta ,  Sumathy Raman ,  Hugo S. Caram ,  David C. Dankworth

IPC: C01B32/05 ,  C01B3/24 ,  C01B3/34 ,  C01B3/26

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：US11629056B2

公开(公告)日：2023-04-18

申请号：US17124113

申请日：2020-12-16

Applicant: ExxonMobil Technology 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：US11577955B2

公开(公告)日：2023-02-14

申请号：US16540300

申请日：2019-08-14

Applicant: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY

Inventor： Ramesh Gupta ,  Sumathy Raman ,  Hugo S. Caram ,  David C. Dankworth

IPC: C01B31/02 ,  C01B3/34 ,  C01B32/05 ,  B01J6/00 ,  C01B3/24

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：US20240071575A1

公开(公告)日：2024-02-29

申请号：US17899271

申请日：2022-08-30

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY

Inventor： Rodrigo Neumann Barros Ferreira ,  Ricardo Luis Ohta ,  Yogesh V. Joshi ,  Mathias B. Steiner ,  Tonia Elengikal ,  Binquan Luan ,  Ashish B. Mhadeshwar ,  Jayashree Kalyanaraman ,  Anantha Sundaram ,  Sumathy Raman

IPC: G16C20/30

CPC classification number: G16C20/30

Abstract: Ranking materials for post combustion carbon capture by characterizing sorbent materials with a molecular model workflow that generates microscopic figures of merit for materials by microscopic properties; and evaluating the materials from the molecular model workflow with a process model workflow that generates macroscopic figures of merit for process steps of a carbon recovery process. The materials for applicability as a sorbent material are ranked using a combined microscopic performance and macroscopic process feasibility generator that ranks the materials according to the microscopic figures of merit for materials and the macroscopic figures of merit for the process steps.