PREPARATION DEVICE AND PREPARATION METHOD OF AMMONIA GAS

    公开(公告)号:US20220098048A1

    公开(公告)日:2022-03-31

    申请号:US17426744

    申请日:2019-08-12

    发明人: Qi Wang Changjun Yu

    IPC分类号: C01C1/02 B01J8/18

    摘要: Disclosed are a preparation device and a preparation method of ammonia gas. The preparation device, prepares ammonia gas by reacting ammonium chloride with a particulate inorganic salt, includes one fluidized bed reactor with at least two fluidization chambers, in which one is a preheating chamber configured to preheat the particulate inorganic salt, and the other is a reaction chamber inside provided with at least one atomizing nozzle, the particulate inorganic salt forming a fluidized bed layer and reacting with an aqueous solution of ammonium chloride in the reaction chamber to generate the ammonia gas. The particulate inorganic salt can be sequentially flowed through a plurality of preheating chambers and reaction chambers under an impetus of a density difference of the particulate bed layers, finally achieving the required conversion rate.

    Ammonia sensor calibration method

    公开(公告)号:US10400649B2

    公开(公告)日:2019-09-03

    申请号:US15862667

    申请日:2018-01-05

    摘要: A slope Δt1HC in a linear area of sensor output characteristics for a mixed atmosphere of CO and THC and a slope Δt1NH in the linear area of the sensor output characteristics for NH3 are specified in advance at a time when a time t1 has elapsed since a start of use of an engine. In performing calibration of an NH3 sensor when a time t2 (greater than the time t1) has elapsed, a slope Δt2HC in the linear area of the sensor output characteristics for the mixed atmosphere is specified, a value Δt2NH is calculated from an equation Δt2NH=Δt2HC/(Δt1HC/Δt1NH), and the calculated value Δt2NH is determined as a new slope in the linear area of the sensor output characteristics for an NH3 gas.