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    Method of detecting reative gases in a gas mixture
    71.
    发明授权
    Method of detecting reative gases in a gas mixture 失效
    检测气体混合物中的气体的方法

    公开(公告)号：US4668635A

    公开(公告)日：1987-05-26

    申请号：US713274

    申请日：1985-03-18

    Applicant: Martin Forster

    Inventor： Martin Forster

    IPC: G01N21/31 ,  G01N21/3504 ,  G01N21/78 ,  G01N33/00 ,  G01N21/35

    CPC classification number: G01N33/004 ,  G01N21/783 ,  G01N2021/3129 ,  G01N21/3504 ,  G01N2201/128 ,  Y10T436/205831

    Abstract: Reactive gases like, for example reducing gases, specifically carbon monoxide, are detected in a gas mixture, particularly in air, with extremely high sensitivity and with high precision using a gas detector in which the attenuation of the intensity of an infrared radiation beam by a catalyst layer is utilized. Such catalyst layer contains at least one transition metal selected from at least one of the groups I, VII, and VIII of the Periodic Table of the Chemical Elements. Preferably, chemical elements are used having an atomic weight in the range of about 100 to about 205. The detection of carbon monoxide is particularly sensitive using a catalyst layer which substantially contains a metal capable of forming a carboncarbonyl compound with carbon monoxide. The sensitivity and precisionof detecting carbon monoxide and other reducing gases can be significantly increased by periodically exchanging the gas mixture to be investigated in a measuring chamber and replacing it with a pure reference gas from a reference chamber. The sensitivity and precision of the gas detection can be further increased by periodically alternating the temperature of the catalyst layer during such period of gas exchange. The alternating signal this obtained at an output of the gas detector can be evaluated for determining the concentration of the reactive or reducing gases in the investigated gas mixture.

    Abstract translation: 诸如还原气体，特别是一氧化碳的反应性气体，在具有极高灵敏度和高精度的气体混合物，特别是空气中被检测，使用气体检测器，其中红外辐射束的强度衰减为 催化剂层被利用。 这种催化剂层含有至少一种选自化学元素周期表的I，VII和VIII族中至少一个的过渡金属。 优选地，使用原子量在约100至约205范围内的化学元素。使用基本上含有能够与一氧化碳形成碳羰基化合物的金属的催化剂层，一氧化碳的检测特别敏感。 通过在测量室中周期性地更换待研究的气体混合物并用参考室中的纯参考气体代替，可以显着提高检测一氧化碳和其他还原气体的灵敏度和精度。 通过在气体交换期间周期性地交替催化剂层的温度可以进一步提高气体检测的灵敏度和精度。 可以评估在气体检测器的输出处获得的交变信号，以确定所研究的气体混合物中的反应性或还原性气体的浓度。

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