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Title: Response characteristics of stable mixed-potential NH 3 sensors in diesel engine exhaust

Abstract

Here, a mixed-potential, electrochemical sensor platform is extended to NH 3 sensing by the introduction of a new gold alloy working electrode. A planar, pre-commercial NH 3 sensor utilized LANL’s controlled interface approach, and a Pd-Au alloy working electrode was tested in exhaust of a GM 1.9 L diesel engine downstream of a diesel oxidation catalyst through a slipstream arrangement. A fraction of the exhaust was pulled across the sensor with a pump at 20 L/min. In order to simulate NH 3 slip inside of a full SCR emissions control system, NH 3 was injected immediately upstream of the sensor using a calibrated mass flow controller. The sensor response quantitatively tracked the NH 3 as measured via Fourier transform infrared (FTIR) analyzer. A calibration curve was obtained in the exhaust from an ammonia staircase response with the engine running at steady-state engine conditions resulting in low background concentrations of NO x and HC (<20 ppm) during calibration. Exhaust gas recirculation (EGR) switching and sweeps were used to evaluate the NH 3 sensor response under different amounts of total background NO x. The calibration curve was used to directly compare the [NH 3] calculated from sensor response to the gas phasemore » composition measured via FTIR. In general, there was excellent quantitative agreement between the sensor response and the actual NH 3 in the exhaust gas, and fast response time such that transients (<5 ppm) could be easily discerned from baseline. A LANL pre-commercial NO x sensor was tested simultaneously with the NH 3 sensor and the extent of cross-sensitivity between the two sensors will be discussed.« less

Authors:
 [1];  [2];  [1];  [2];  [2];  [2];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Oak Ridge National Lab. (ORNL), Knoxville, TN (United States). National Transportation Research Center
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Fuels, Engines and Emissions Research Center (FEERC); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). National Transportation Research Center (NTRC); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1357966
Alternate Identifier(s):
OSTI ID: 1406205
Report Number(s):
LA-UR-16-26242
Journal ID: ISSN 2199-3629; VT0401000; CEVT010
Grant/Contract Number:  
AC05-00OR22725; AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Emission Control Science & Technology
Additional Journal Information:
Journal Volume: 3; Journal Issue: 1; Journal ID: ISSN 2199-3629
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; sensor; electrochemical; mixed-potential; ammonia sensor; Energy Sciences; Electrochemical, Sensor, Ammonia, Mixed-potential

Citation Formats

Brosha, Eric L., Prikhodko, Vitaly Y., Kreller, Cortney R., Pihl, Josh A., Curran, Scott, Park, II, James E., and Mukundan, R. Response characteristics of stable mixed-potential NH3 sensors in diesel engine exhaust. United States: N. p., 2016. Web. doi:10.1007/s40825-016-0050-2.
Brosha, Eric L., Prikhodko, Vitaly Y., Kreller, Cortney R., Pihl, Josh A., Curran, Scott, Park, II, James E., & Mukundan, R. Response characteristics of stable mixed-potential NH3 sensors in diesel engine exhaust. United States. doi:10.1007/s40825-016-0050-2.
Brosha, Eric L., Prikhodko, Vitaly Y., Kreller, Cortney R., Pihl, Josh A., Curran, Scott, Park, II, James E., and Mukundan, R. Thu . "Response characteristics of stable mixed-potential NH3 sensors in diesel engine exhaust". United States. doi:10.1007/s40825-016-0050-2. https://www.osti.gov/servlets/purl/1357966.
@article{osti_1357966,
title = {Response characteristics of stable mixed-potential NH3 sensors in diesel engine exhaust},
author = {Brosha, Eric L. and Prikhodko, Vitaly Y. and Kreller, Cortney R. and Pihl, Josh A. and Curran, Scott and Park, II, James E. and Mukundan, R.},
abstractNote = {Here, a mixed-potential, electrochemical sensor platform is extended to NH3 sensing by the introduction of a new gold alloy working electrode. A planar, pre-commercial NH3 sensor utilized LANL’s controlled interface approach, and a Pd-Au alloy working electrode was tested in exhaust of a GM 1.9 L diesel engine downstream of a diesel oxidation catalyst through a slipstream arrangement. A fraction of the exhaust was pulled across the sensor with a pump at 20 L/min. In order to simulate NH3 slip inside of a full SCR emissions control system, NH3 was injected immediately upstream of the sensor using a calibrated mass flow controller. The sensor response quantitatively tracked the NH3 as measured via Fourier transform infrared (FTIR) analyzer. A calibration curve was obtained in the exhaust from an ammonia staircase response with the engine running at steady-state engine conditions resulting in low background concentrations of NOx and HC (<20 ppm) during calibration. Exhaust gas recirculation (EGR) switching and sweeps were used to evaluate the NH3 sensor response under different amounts of total background NOx. The calibration curve was used to directly compare the [NH3] calculated from sensor response to the gas phase composition measured via FTIR. In general, there was excellent quantitative agreement between the sensor response and the actual NH3 in the exhaust gas, and fast response time such that transients (<5 ppm) could be easily discerned from baseline. A LANL pre-commercial NOx sensor was tested simultaneously with the NH3 sensor and the extent of cross-sensitivity between the two sensors will be discussed.},
doi = {10.1007/s40825-016-0050-2},
journal = {Emission Control Science & Technology},
number = 1,
volume = 3,
place = {United States},
year = {2016},
month = {10}
}

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Works referenced in this record:

Nitrogen Oxide Sensors Based on Yttria-Stabilized Zirconia Electrolyte and Oxide Electrodes
journal, January 2007

  • Mukundan, Rangachary; Teranishi, Kazuhiro; Brosha, Eric L.
  • Electrochemical and Solid-State Letters, Vol. 10, Issue 2
  • DOI: 10.1149/1.2400211

Dynamometer Testing of Planar Mixed-Potential Sensors
journal, September 2014

  • Kreller, C. R.; Sekhar, P. K.; Prikhodko, V.
  • ECS Transactions, Vol. 61, Issue 19
  • DOI: 10.1149/06119.0055ecst

Application of commercial automotive sensor manufacturing methods for NOx/NH3 mixed potential sensors for on-board emissions control
journal, January 2010

  • Sekhar, Praveen K.; Brosha, Eric. L.; Mukundan, Rangachary
  • Sensors and Actuators B: Chemical, Vol. 144, Issue 1
  • DOI: 10.1016/j.snb.2009.10.045

Sensing mechanism of non-equilibrium solid-electrolyte-based chemical sensors
journal, March 2010


Solid-state mixed potential gas sensors: theory, experiments and challenges
journal, November 2000


Progress and future challenges in controlling automotive exhaust gas emissions
journal, January 2007


Emission Characteristics of a Diesel Engine Operating with In-Cylinder Gasoline and Diesel Fuel Blending
journal, August 2010

  • Prikhodko, Vitaly Y.; Curran, Scott J.; Barone, Teresa L.
  • SAE International Journal of Fuels and Lubricants, Vol. 3, Issue 2
  • DOI: 10.4271/2010-01-2266

Mixed Potential Hydrocarbon Sensors based on a YSZ Electrolyte and Oxide Electrodes
journal, January 2003

  • Mukundan, Rangachary; Brosha, Eric L.; Garzon, Fernando H.
  • Journal of The Electrochemical Society, Vol. 150, Issue 12
  • DOI: 10.1149/1.1621880