Exhaust gas purging composition
    7.
    发明授权

    公开(公告)号:US11633723B2

    公开(公告)日:2023-04-25

    申请号:US16760479

    申请日:2018-10-03

    摘要: A composition for exhaust gas purification containing Y—Mn—O and Al2O3 and having a specific surface area (SSA) retention satisfying inequality (1) SSA retention (%) >−61.54×(Y—Mn—O ratio)+75.55 and inequality (2) SSA retention (%) >45 (2), where SSA retention is represented by (SSA after aging)/(initial SSA)×100 (%). The SSA after aging and the initial SSA are as defined in the description. The Y—Mn—O ratio is a mass ratio of Y—Mn—O to the sum of Y—Mn—O and Al2O3 in the composition for exhaust gas purification, being represented by Y—Mn—O/(Y—Mn—O+Al2O3).

    Selective hydrogenation methods and catalysts

    公开(公告)号:US11623902B2

    公开(公告)日:2023-04-11

    申请号:US16660119

    申请日:2019-10-22

    摘要: The present disclosure relates to methods for selectively hydrogenating acetylene, to methods for starting up a selective hydrogenation reactor, and to hydrogenation catalysts useful in such methods. In one aspect, the disclosure provides a method for selectively hydrogenating acetylene, the method comprising contacting a catalyst composition with a process gas. The catalyst composition comprises a porous support, palladium, and one or more ionic liquids. The process gas includes ethylene, present in the process gas in an amount of at least 20 mol. %; and acetylene, present in the process gas in an amount of at least 1 ppm. At least 90% of the acetylene present in the process gas is hydrogenated, and the selective hydrogenation is conducted without thermal runaway. Notably, the process gas is contacted with the catalyst at a gas hourly space velocity (GHSV) based on total catalyst volume in one bed or multiple beds of at least 7,100 h−1.

    Removable impingement basket for ethylene oxide (EO) reactors

    公开(公告)号:US11559799B2

    公开(公告)日:2023-01-24

    申请号:US17130961

    申请日:2020-12-22

    发明人: Mohammad Ganjvar

    摘要: An ethylene oxide (EO) reactor is provided in which a removable impingement basket is configured to be inserted into the reactor inlet pipe of the EO reactor. The removable impingement basket provides protection for the silver-based catalyst filled tubes and other components that are present inside the EO reactor as well as providing another access point into the EO reactor. The removable impingement basket also can provide better distribution of the inlet gas as compared to an EO reactor containing a non-removable impingement plate.