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    • 2. 发明申请
    • REGENERATIVE GAS SENSOR
    • 再生气体传感器
    • WO2013090015A1
    • 2013-06-20
    • PCT/US2012/067020
    • 2012-11-29
    • UTC FIRE & SECURITY CORPORATIONCHEN, LeiYANG, ZhiweiVINCITORE, Antonio M.SANGIOVANNI, Joseph J.
    • CHEN, LeiYANG, ZhiweiVINCITORE, Antonio M.SANGIOVANNI, Joseph J.
    • G01N27/407G01N33/00
    • G01N27/30G01N27/4045G01N27/407G01N33/0044
    • A gas sensor (10), especially for determining H2S, includes a housing (22) having disposed therein a membrane electrode assembly comprising a sensing electrode (14), a counter electrode (16), and a polymer membrane (12), especially NAFION, disposed between the sensing electrode and the counter electrode. The polymer membrane comprises an ionic liquid, especially an imidazolium salt retained therein. The sensor also includes a catalyst support that can be stable in a range of potentials to allow for detection mode and catalyst regeneration mode to be operative. The sensor further includes circuitry and algorithm to implement the catalyst regeneration mechanism electrochemically, eg. by oxidizing contaminants such as elemental sulfur. The sensor further includes a chamber (29) for reference gas to which the counter electrode is exposed, and a chamber (28) for test gas to which a gas to be tested is exposed. The sensor also includes a pathway for test gas to enter the chamber and a measurement electrical circuit (19) connecting the sensing electrode and the counter electrode.
    • 特别是用于确定H 2 S的气体传感器(10)包括壳体(22),其中设置有包括感测电极(14),对电极(16)和聚合物膜(12)的膜电极组件,特别是NAFION ,设置在感测电极和对电极之间。 聚合物膜包含离子液体,特别是保留在其中的咪唑鎓盐。 传感器还包括催化剂载体,该催化剂载体在一定范围的电位中是稳定的,以允许检测模式和催化剂再生模式可操作。 传感器还包括电化学实现催化剂再生机构的电路和算法,例如。 通过氧化污染物如元素硫。 传感器还包括用于对置电极暴露于其中的参考气体的腔室(29),以及用于测试气体暴露的测试气体室(28)。 传感器还包括用于测试气体进入腔室的通路和连接感测电极和对电极的测量电路(19)。