Citation: CAO Xiao-Rong, HU Ming-Jiang. Research on Chemical Looping Combustion-Type Methane Sensor Based on ZnO-SnO₂ Nanofibers[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(10): 1555-1561. doi: 10.11895/j.issn.0253-3820.160283 shu

Research on Chemical Looping Combustion-Type Methane Sensor Based on ZnO-SnO₂ Nanofibers

CAO Xiao-Rong ^1, ,
HU Ming-Jiang ²

1.
Department of Mechanical and Electrical Engineering, Henan Quality Engineering Vocational College, Pingdingshan 467000, China;
2.
School of Energy and Building Environmental Engineering, Henan University of Urban Construction, Pingdingshan 467036, China

Received Date: 11 April 2016
Revised Date: 8 July 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (No.51376083) and the Educational Commission of He'nan Province of China (No.15A470006)

Figures(7)

ZnO-SnO₂ composite nanofibers of methane sensor were prepared by the double jets electrospinning method. A new chemical looping combustion type methane sensor was designed with ZnO-SnO₂ composite nanofibers deposited onto Pt thermistor surface as catalytic thin film. The crystalline phase and microstructure of ZnO-SnO₂ composite nanofibers were displayed using X-ray diffraction (XRD) and scanning electron microscope (SEM), and the chemical looping combustion reaction and electrochemical characteristic about methane and catalytic thin film were analyzed by CH₄ temperature programmed reduction (CH₄-TPR) and X-ray photoelectron spectroscopy (XPS). These characteristic tests of the methane sensor were carried out on the traits of sensitive performance, dynamic response, temperature, humidity, selective and stability by DL07-YJ108D type voltage measuring instrument. The conclusion demonstrated that methane sensor based on Zn50 composite nanofibers functioned as catalytic film. When the operating temperature was 350℃ and methane concentration was increased from 0.1 to 60 μg/L, the linearity and sensitivity of methane sensor were 99.4% and 0.12 V/(μg/L) respectively. Its high response was 8.2 V, and the dynamic response time and recover time of methane sensor were 5.4 and 10.8 s, respectively, with a high relatively humidity level of 95%. The response value of methane sensor was only decreased about 2.0% when it was continually applied in mine about 6 months.
- Electrospinning,
- Methane,
- Sensor,
- Chemical looping combustion,
- Composite nanofibers,
- Catalytic thin film
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Research on Chemical Looping Combustion-Type Methane Sensor Based on ZnO-SnO₂ Nanofibers