Hierarchical methods to improve the performance of the SiC-FET as SO2 sensors in flue gas desulphurization systems

SENSORS AND ACTUATORS B-CHEMICAL

卷:206

Article

Darmastuti, Z.¹  Bur, C.^1,3  Lindqvist, N.²  Andersson, M.¹  Schuetze, A.³  Spetz, A. Lloyd¹ 

[1] Linkoping Univ, Dept Phys Chem & Biol, Linkoping, Sweden

[2] Alstom Power AB, Vaxjo, Sweden

[3] Univ Saarland, Lab Measurement Technol, D-66123 Saarbrucken, Germany

关键词: SO2 sensors;    SiC-FET;    Pt;    Temperature cycled operation (TCO);    Hierarchical methods;    Power plant;   

DOI  :  10.1016/j.snb.2014.09.113

来源: Elsevier

【 摘 要 】

Experiments were performed both in the laboratory and a desulfurization pilot unit in order to improve the SiC-FET sensor performance using two-step data evaluation. In both cases, a porous Pt-gate enhancement type SiC-FET was utilized in a temperature cycled operation (TCO). Liner Discriminant Analysis (LDA) was chosen as the method for multivariate data analysis. Hierarchical methods with two-step LDA worked quite well in the laboratory tests with SO2 concentrations varied from 25 to 200 ppm. The same data evaluation was also applied to tests in the desulfurization pilot unit, with higher gas flow and a larger SO2 concentration range (up to 5000 ppm). The results from the SO2 quantification showed a significantly improved fit to corresponding reference instrument (FTIR) values. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

Free