公开(公告)号：US20240116817A1

公开(公告)日：2024-04-11

申请号：US18481377

申请日：2023-10-05

Applicant: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY

Inventor： Changmin Chun ,  Wesley SATTLER ,  Anjaneya S. KOVVALI

IPC: C04B35/10 ,  B01J23/755 ,  B01J35/04 ,  C01B3/26 ,  C01B3/38 ,  C01B3/40 ,  C04B38/00

CPC classification number: C04B35/10 ,  B01J23/755 ,  B01J35/04 ,  C01B3/26 ,  C01B3/382 ,  C01B3/40 ,  C04B38/0006 ,  C04B38/0051 ,  C04B38/0067 ,  C01B2203/1082 ,  C01B2203/1604 ,  C01B2203/1614 ,  C04B2235/3217 ,  C04B2235/3418

Abstract: Ceramic monolith compositions are provided with improved stability under reaction conditions involving elevated temperatures. Such monoliths can be used, for example, in reverse flow reactors under high temperature reforming conditions, where the interior components of the reaction zone can be exposed to average temperatures of 1000° C. or higher while also being exposed to rapid oscillations in temperature of 100° C. or more in the presence of alternating oxidizing and reducing chemistries. The ceramic monolith compositions can be composed of materials that have improved ability to withstand conditions in severe reaction environments. Additionally or alternately, the ceramic monolith compositions can have structural features that reduce or minimize the tendency for the monolith to suffer structural failure under the conditions in severe reaction environments.

公开(公告)号：US20250033029A1

公开(公告)日：2025-01-30

申请号：US18784308

申请日：2024-07-25

Applicant: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY

Inventor： Wesley SATTLER ,  Scott J. WEIGEL ,  Aaron W. PETERS ,  Keith HAJKOWSKI ,  Ryan DUGAN ,  Nicole HERB ,  Edward J. LEE ,  Jason C. MICHL ,  Julio CASTILLO

IPC: B01J20/32 ,  B01J20/26

Abstract: Monolith structures coated with porous solids are provided that can serve as structural materials for amine sorbents, such as polyamine sorbents. By using monolith structures that are coated with suitable porous solids, the sorption capacity of an amine sorbent material that is deposited on the monolith coated with the porous solid can be substantially maintained as the loading density of the amine is increased. This can allow for higher productivity sorption systems by allowing higher concentrations of amine to be effectively used while still substantially maintaining the favorable sorption characteristics of the amine sorbent.

公开(公告)号：US20250033026A1

公开(公告)日：2025-01-30

申请号：US18784261

申请日：2024-07-25

Applicant: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY

Inventor： Scott WEIGEL ,  Wesley SATTLER ,  Allen BURTON ,  Keith HAJKOWSKI ,  Ryan DUGAN ,  Aaron PETERS

IPC: B01J20/26 ,  B01J20/32

Abstract: Amorphous silica-alumina support materials are provided that can serve as supports for polyamines. The silica-alumina support materials have a combination of properties that unexpectedly allow supported polyamines to retain an increased or maximized amount of CO2 sorption capacity after incorporation of substantial amounts of the polyamine on the support material. This combination of properties can include having a high pore volume, a high ratio of mesopore volume to micropore volume, and a sufficiently high acidity. The ability to allow supported amine sorbents to retain additional CO2 sorption capacity is unexpected. Additionally, the relationship between having sufficiently high acidity and providing improved sorption capacity for a supported amine material is unexpected.

公开(公告)号：US20250025866A1

公开(公告)日：2025-01-23

申请号：US18907836

申请日：2024-10-07

Applicant: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY

Inventor： Keith R. HAJKOWSKI ,  Wesley SATTLER ,  Michele A. WARREN

IPC: B01J35/00 ,  B01J21/04 ,  B01J23/44 ,  B01J23/46 ,  B01J23/755 ,  B01J23/96 ,  B01J35/57 ,  B01J37/00 ,  B01J38/12 ,  C01B3/40

Abstract: Palladium-based catalyst systems are provided for reforming of hydrocarbons, along with methods for using such catalyst systems. The catalyst systems can be deposited or otherwise coated on a surface or structure, such as a monolith, to achieve improved activity and/or structural stability. It has been discovered that loss of catalytic activity for reforming over time can be reduced or minimized for palladium-based catalyst system by operating the reactor/performing a reaction cycle so that the portion of the reaction environment containing the palladium-based catalyst system is not exposed to oxidizing conditions at temperatures between 600° C. and 900° C. Optionally, the reactor can also be operated/the reaction cycle can also be designed so that during a reforming cycle, the peak temperature in the portion of the reaction environment containing the palladium-based catalyst system is 1300° C. or less.