Search Results - "Beulertz, Gregor"

Dual mode NOx sensor: measuring both the accumulated amount and instantaneous level at low concentrations by Groß, Andrea, Beulertz, Gregor, Marr, Isabella, Kubinski, David J, Visser, Jaco H, Moos, Ralf

“…The accumulating-type (or integrating-type) NO(x) sensor principle offers two operation modes to measure low levels of NO(x): The direct signal gives the total…”
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In operando Detection of Three-Way Catalyst Aging by a Microwave-Based Method: Initial Studies by Beulertz, Gregor, Votsmeier, Martin, Moos, Ralf

“…Initial studies on aging detection of three way catalysts with a microwave cavity perturbation method were conducted. Two physico-chemical effects correlate…”
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Effect of propene, propane, and methane on conversion and oxidation state of three-way catalysts: a microwave cavity perturbation study by Beulertz, Gregor, Votsmeier, Martin, Moos, Ralf

“…•Paper is concerned with the hydrocarbon conversion of three-way catalysts (TWC).•A novel method (microwave cavity perturbation) can determine in operando the…”
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Microwave Cavity Perturbation as a Tool for Laboratory In Situ Measurement of the Oxidation State of Three Way Catalysts by Beulertz, Gregor, Fritsch, Mirko, Fischerauer, Gerhard, Herbst, Felix, Gieshoff, Jürgen, Votsmeier, Martin, Hagen, Gunter, Moos, Ralf

“…Three-way catalyst-based automotive exhaust gas aftertreatment is of high importance to meet today’s emission standards. To determine in situ the oxygen…”
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Overview: Status of the Microwave-Based Automotive Catalyst State Diagnosis by Moos, Ralf, Beulertz, Gregor, Reiß, Sebastian, Hagen, Gunter, Fischerauer, Gerhard, Votsmeier, Martin, Gieshoff, Jürgen

“…The oxygen loading degree in TWCs, the amount of stored ammonia in SCR catalysts, the NO x loading degree in LNTs, or the soot loading of DPFs play a key role…”
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