Comparison of Two Different Heat-Integrated Exhaust Purification Devices for Monovalent CNG Engines

Rink, Matthias; Eigenberger, Gerhart; Nieken, Ulrich

doi:10.1007/s11244-013-9990-8

Cited by 8 publications

(5 citation statements)

References 5 publications

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“…Top: operating mode during cold start or high load without heat recovery. Bottom: normal operating mode with heat recovery [6].…”

Section: Drive Cycle Simulation Comparing Standard and Heat-integratementioning

confidence: 99%

“…A specific challenge of heat-integrated exhaust catalysts is the sufficiently rapid cold start of such systems, which is especially crucial regarding hydrocarbon emissions. To this end, a heating strategy based on a fuel burner, attached to the hot end of the heat exchanger, was proposed in [6]. In the present case, however, such a system could cause perturbations of the exhaust's air fuel ratio which is crucial for optimal catalyst performance.…”

Section: Introductionmentioning

confidence: 98%

“…In order to quickly heat up the system, a layout different from Fig. 1 was developed [5,6], which is schematically depicted in Fig. 2.…”

Section: Introductionmentioning

confidence: 99%

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Heat‐Integrated Exhaust Purification for Natural Gas Engines

Rink¹,

Eigenberger²,

Nieken³

2013

Chemie Ingenieur Technik

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Vehicles running on compressed natural gas (CNG) are a promising option to significantly decrease automotive CO 2 emissions. However, considerable amounts of methane are emitted by the exhaust of CNG powered engines which are difficult to convert by standard catalytic converters. Yet, by combining the catalyst with an efficient heat exchanger, the temperature level of the catalyst can be raised for enhanced conversion performance. Experimental results of stationary tests performed with a heat-integrated laboratory-scale system are shown. A special cold start strategy required for fast system heating is presented based on a detailed transient simulation study and a new system layout is described.

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“…Top: operating mode during cold start or high load without heat recovery. Bottom: normal operating mode with heat recovery [6].…”

Section: Drive Cycle Simulation Comparing Standard and Heat-integratementioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Heat‐Integrated Exhaust Purification for Natural Gas Engines

Rink¹,

Eigenberger²,

Nieken³

2013

Chemie Ingenieur Technik

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“…With the objective to improve SCR conversion during low-speed driving, some authors have studied the use of exhaust heaters. Some electrical preheated catalytic converters have been tested with relevant results [23,24]. However, this solution is not as efficient as heating the exhaust gases directly.…”

Section: Introductionmentioning

confidence: 99%

Towards Compliance with the Prospective Euro Vii Nox Emissions Limit Using a Thermoelectric Aftertreatment Heater

Ximinis¹,

Massaguer²,

Massaguer³

2022

SSRN Journal

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“…Nevertheless, the application of this technology is accompanied by the necessity of controlling the emissions of unburned methane from the engine, as this is a powerful greenhouse effect gas. The most commonly applied solution is the complete oxidation over a supported noble metal catalyst, such as platinum and/or palladium [3,4]. However, the price of these metals is extremely high and they are also prone to deactivation by sintering and the presence of water, and thus, this raises the cost of natural gas engines and limits their massive implementation.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Kinetic Behavior of Supported Cobalt Catalysts for Oxidative after-Treatment of Methane Lean Mixtures

et al. 2019

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The present work addresses the influence of the support on the catalytic behavior of Co3O4-based catalysts in the combustion of lean methane present in the exhaust gases from natural gas vehicular engines. Three different supports were selected, namely γ-alumina, magnesia and ceria and the corresponding catalysts were loaded with a nominal cobalt content of 30 wt. %. The samples were characterized by N2 physisorption, wavelength dispersive X-ray fluorescence (WDXRF), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and temperature-programmed reduction with hydrogen and methane. The performance was negatively influenced by a strong cobalt-support interaction, which in turn reduced the amount of active cobalt species as Co3O4. Hence, when alumina or magnesia supports were employed, the formation of CoAl2O4 or Co–Mg mixed oxides, respectively, with a low reducibility was evident, while ceria showed a lower affinity for deposited cobalt and this remained essentially as Co3O4. Furthermore, the observed partial insertion of Ce into the Co3O4 lattice played a beneficial role in promoting the oxygen mobility at low temperatures and consequently the catalytic activity. This catalyst also exhibited a good thermal stability while the presence of water vapor in the feedstream induced a partial inhibition, which was found to be completely reversible.

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Comparison of Two Different Heat-Integrated Exhaust Purification Devices for Monovalent CNG Engines

Cited by 8 publications

References 5 publications

Heat‐Integrated Exhaust Purification for Natural Gas Engines

Heat‐Integrated Exhaust Purification for Natural Gas Engines

Towards Compliance with the Prospective Euro Vii Nox Emissions Limit Using a Thermoelectric Aftertreatment Heater

Synthesis, Characterization and Kinetic Behavior of Supported Cobalt Catalysts for Oxidative after-Treatment of Methane Lean Mixtures

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