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    Metal-Organic Framework Materials Comprising a Pyrazolylcarboxylate Ligand and Methods for Production Thereof
    21.
    发明申请
    Metal-Organic Framework Materials Comprising a Pyrazolylcarboxylate Ligand and Methods for Production Thereof 有权

    公开(公告)号：US20220370992A1

    公开(公告)日：2022-11-24

    申请号：US17621281

    申请日：2020-05-28

    Applicant: ExxonMobil Research and Engineering Company

    Inventor： Joseph M. Falkowski ,  Yogesh V. Joshi ,  Mary S. Abdulkarim ,  Simon C. Weston

    IPC: B01J31/16 ,  B01J37/04 ,  B01J37/30 ,  B01J35/10 ,  C07F3/06 ,  C07C5/03

    Abstract: Metal-organic framework materials (MOFs) are highly porous entities comprising a multidentate organic ligand coordinated to multiple metal centers. MOFs having ambient condition stability may comprise a plurality of metal clusters comprising one or more M4O clusters (M is a metal), and a plurality of 4-pyrazolecarboxylate ligands coordinated to the plurality of metal clusters to define an at least partially crystalline network structure having a plurality of internal pores. The MOFs may have a Pa3 symmetry, which upon activation may convert into Fm3m symmetry. Methods for synthesizing the MOFs may comprise combining a metal source, such as a preformed metal cluster, with 4-pyrazolecarboxylic acid, and reacting the preformed metal cluster with the 4-pyrazolecarboxylic acid to form a MOF having an at least partially crystalline network structure with a plurality of internal pores defined therein and comprising a plurality of metal clusters coordinated to a multidentate organic ligand comprising 4-pyrazolecarboxylate.

    BED REGENERATION USING LOW VALUE STEAM
    22.
    发明申请
    BED REGENERATION USING LOW VALUE STEAM 有权

    公开(公告)号：US20220233996A1

    公开(公告)日：2022-07-28

    申请号：US17647393

    申请日：2022-01-07

    Applicant: ExxonMobil Research and Engineering Company

    Inventor： Mohsen S. Yeganeh ,  John W. Fulton, JR. ,  Sundaresan Narayanan ,  Timothy A. Barckholtz ,  Simon C. Weston

    IPC: B01D53/14 ,  F01K25/10

    Abstract: Systems and methods are provided for regenerating a bed containing absorbed and/or adsorbed CO2 using a low value steam stream. The steam stream can have a pressure of 10 kPa-a to 50 kPa-a and a temperature of 46° C. to 81° C. The steam stream can be used to displace CO2 from the bed, resulting in formation of a low pressure stream including water vapor and CO2. The stream containing water vapor and CO2 is then passed through a liquid ring pump that includes an associated ring cooler. The ring pump provides the suction necessary to draw the low value steam stream through the bed to displace the CO2. Due to the nature of operation of the liquid ring pump, the majority of water in the steam containing H2O and CO2 can be removed within the liquid ring pump, resulting in production of a stream comprising 90 vol % or more of CO2 at a pressure of 90 kPa-a or more. An example of a bed that can be regenerated using a low value steam stream is a bed that corresponds to a liquid amine that is coated on/covering/impregnated into a porous solid, so that the liquid amine remains substantially in place during a cycle of sorption and desorption of CO2.

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