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Title: Modelling and sensing characteristics of an amperometric hydrocarbon sensor
Authors: Tan, Y.
Tan, T.C. 
Keywords: gas sensor
hydrocarbon sensing
theoretical modelling
Issue Date: Aug-1996
Citation: Tan, Y., Tan, T.C. (1996-08). Modelling and sensing characteristics of an amperometric hydrocarbon sensor. Chemical Engineering Science 51 (16) : 4001-4011. ScholarBank@NUS Repository.
Abstract: An amperometric hydrocarbon sensor was fabricated by mounting a thin layer of 7CuO·10ZnO·3Al2O3 catalyst on top of the platinum cathode of an oxygen sensor with 9% yttria-stabilised zirconia as the electrolyte. A one-dimensional theoretical model was developed to relate the sensor response to the rate processes occurring in the mixed metal oxides catalyst and in the oxygen cell. The response was shown theoretically to follow a mixed first- and half-order concentration dependency. Sensing response towards methane, ethane, propane, isobutane and ethylene was obtained at various temperatures from 1023 to 1093 K and at an applied voltage of 0.8 V to the oxygen cell. The voltage applied was sufficiently high to maintain the oxygen cell under diffusion-controlled or limiting current operating conditions. The response for each of the five hydrocarbons was adequately described by the model with an absolute error of 2.4 5.7%. The rate parameters of the models obtained from the correlation were comparable with the values reported for similar media.
Source Title: Chemical Engineering Science
ISSN: 00092509
DOI: 10.1016/0009-2509(96)00231-X
Appears in Collections:Staff Publications

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