New Method for NO/NO2/NH3 Measurements and differentiation with a Single Sensor

被引：0

作者：

Farber, B. Ya ^{[1
]}

Graves, G. ^{[1
]}

Li, Y. C. ^{[2
]}

Rash, T. ^{[2
]}

Currier, N. W. ^{[2
]}

机构：

[1] Zircoa Inc, 31501 Solon Rd, Solon, OH 44139 USA

[2] Cummins Inc, 1900 McKinley Ave, Columbus, IN 47201 USA

来源：

SENSORS AND ELECTRONIC INSTRUMENTATION ADVANCES (SEIA' 19) | 2019年

关键词：

NOx sensor; NH3; sensor; Lambda probe; Pt/YSZ electrodes; Polarization; Charge transfer; SCR;

D O I：

暂无

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A new approach (Pulse Discharge Technique, PDT) for measurements and differentiation between different exhaust gas components critical for diesel emission control is presented. Electrodes of a conventional lambda sensor are activated by short high amplitude voltage charging pulses of equal amplitude and opposite polarity and kinetics of self-discharge is measured during the pauses separating the charging pulses. PDT demonstrates high sensitivity (in the ppm range) to NO, NO2 and NH3 and low cross-interference to O-2, CO, CO2, HC and H2O. Differentiation between different gas components is accomplished by parameter analysis of self-discharge kinetics and charge transfer characteristics during the charging pulses. Models explaining gas sensitivity under the conditions of PDT are presented and discussed.

引用

页码：231 / 232

页数：2

共 11 条

[1]

Farber B., 2009, US Patents, Patent No. [EP 1891422, 1891422]

[2]

Farber B., 2009, US Patents, Patent No. [US 10156545, 10156545]

[3]

Farber B., 2009, US Patents, Patent No. [US 10,180,408, 10180408]

[4]

Farber B., 2009, US Patents, Patent No. [US 7,585,402, 7585402]