A METHOD FOR CATALYTIC SYNTHESIS OF AMMONIA UNDER NORMAL PRESSURES

    公开(公告)号:US20230312358A1

    公开(公告)日:2023-10-05

    申请号:US18034382

    申请日:2021-11-19

    Abstract: A method for catalytic synthesis of ammonia under normal pressures, including: performing a reaction of hydrogen and nitrogen to synthesize ammonia under normal pressures by taking a liquid alloy as a catalyst in a reactor, where the reactor contains a molten salt, the density of the molten salt is smaller than that of the liquid alloy, and the molten salt is used for providing a reaction interface and isolating the liquid alloy from being introduced impurities. The first metal can react with the nitrogen to produce the metal nitride, and the molten salt can provide a new reaction interface for the metal nitride to react with the hydrogen to synthesize the ammonia, so that the metal nitride can continuously generate the ammonia, and the synthesis of the ammonia can be effectively catalyzed. In addition, the molten salt can prevent the liquid alloy from contacting with the oxygen and the water vapor of the outside atmosphere, thereby preventing the liquid alloy from being oxidized and prolonging the service life of the liquid alloy.

    PILLAR-SHAPED HONEYCOMB STRUCTURE
    67.
    发明公开

    公开(公告)号:US20230311112A1

    公开(公告)日:2023-10-05

    申请号:US18180950

    申请日:2023-03-09

    CPC classification number: B01J35/04 B01J35/1076 B01J35/023 B01J35/0026

    Abstract: A pillar-shaped honeycomb structure includes an outer peripheral side wall, and a plurality of partition walls partitioning a plurality of cells, wherein an average pore diameter of the partition walls measured by a mercury intrusion method specified in JIS R1655: 2003 is 3 to 10 μm, and when a cross-section of the plurality of partition walls is observed with an X-ray microscope and a porosity (%) is measured in a thickness direction from one surface to the other surface of each partition wall, assuming PAVE is an average porosity of each partition wall, P1 MIN is a minimum porosity from the one surface to a thickness of 5% of the partition wall, and P2MIN is a minimum porosity from the other surface to a thickness of 5% of the partition wall, 40% PAVE ≤70%, and {(P1 MIN+P2MIN)/2} /PAVE ≤0.9 are satisfied.

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