Ambient temperature NOx emission control for lean-burn engines by electro-catalytic tubes

Huang, Ta-Jen; Wu, Chung-Ying; Chiang, De-Yi

doi:10.1016/j.apcata.2012.08.011

Cited by 8 publications

(5 citation statements)

References 30 publications

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“…In other words, the electrochemical cells of the ECH can offer facile desorption of the O species formed by NO x decomposition; this is considered the main promotion mechanism for PND. Notably, facile desorption of oxygen has been explained via analysis of temperature-programmed reduction . The technology of PND is thus established in association with the ECH for real-world automotive applications.…”

Section: Resultsmentioning

confidence: 99%

“…Notably, facile desorption of oxygen has been explained via analysis of temperature-programmed reduction. 17 The technology of PND is thus established in association with the ECH for real-world automotive applications. Both Figures 3 and 5 show that the deNO x rate is relatively constant at very low NO x concentrations.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…In particular, the novelty of the ECH is the EDCs, which have no anode-side space. Notably, the term “electro-catalytic honeycomb” has also been used to name a honeycomb composed of electro-catalytic tubes (ECTs), , which have the anode-side space as in the conventional electrochemical cell. Thus, this honeycomb of ECTs uses one-half of its channels to provide the anode-side space, whereas all channels of the ECH are used for the exhaust treatment.…”

Section: Introductionmentioning

confidence: 99%

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Promoted Decomposition of NO_x in Automotive Diesel-like Exhausts by Electro-Catalytic Honeycombs

Huang

Chiang

Shih

et al. 2015

Environ. Sci. Technol.

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NO and NO2 (collectively called NOx) are major air pollutants in automotive emissions. More effective and easier treatments of NOx than those achieved by the present methods can offer better protection of human health and higher fuel efficiency that can reduce greenhouse gas emissions. However, currently commercialized technologies for automotive NOx emission control cannot effectively treat diesel-like exhausts with high NOx concentrations. Thus, exhaust gas recirculation (EGR) has been used extensively, which reduces fuel efficiency and increases particulate emission considerably. Our results show that the electro-catalytic honeycomb (ECH) promotes the decomposition of NOx to nitrogen and oxygen, without consuming reagents or other resources. NOx can be converted to nitrogen and oxygen almost completely. The ECHs are shown to effectively remove NOx from gasoline-fueled diesel-like exhausts. A very high NO concentration is preferred in the engine exhaust, especially during engine cold-start. Promoted NOx decomposition (PND) technology for real-world automotive applications is established in this study by using the ECH. With PND, EGR is no longer needed. Diesel-like engines can therefore achieve superior fuel efficiency, and all major automotive pollutants can be easily treated due to high concentration of oxygen in the diesel-like exhausts, leading to zero pollution.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Promoted Decomposition of NO_x in Automotive Diesel-like Exhausts by Electro-Catalytic Honeycombs

Huang

Chiang

Shih

et al. 2015

Environ. Sci. Technol.

Self Cite

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“…It is noted that the O 2 concentration in the exhaust of a diesel engine is about 10% [37], while the flue gas from the emission of the power plant contains the O 2 concentration of 4%-6% [36]. Therefore, in this paper three different O 2 concentrations ranging from 3% to 9% at 600°C have been investigated by voltage current measurement which the voltage varies from 0 V to 1.5 V at the sweep rate of 5 mV/s.…”

Section: Effect Of O 2 Concentrationmentioning

confidence: 97%

Nitrogen oxide electrochemical reduction characteristics on patterned platinum electrode

Wang

Shi

et al. 2015

Solid State Ionics

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“…Electrochemical removal of NO by using solid oxide electrolysis cell (SOEC) avoids the produced pollutions such as CO, CH x . Besides, it saves the large reducing agents storage system [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Effects of the Ba Impregnation on Pt Electrode on NO Electrochemical Reduction Mechanism

Wang¹

2019

IJEEE

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The study investigated the electrochemical reduction performances of NO and O 2 on Pt symmetric electrode with Ba adsorption layer. The temperature varied from 350°C to 550°C. The experimental Ba (NO 3)2 solution was impregnated in the Pt electrode. For the NO performance, the polarization curves and CV tests showed that the Pt-BaO electrode showed higher electrochemical performance than Pt electrode. EIS results revealed that the Pt-BaO electrode exhibited higher activity than the Pt electrode. It was due to the decreased polarization resistance in the low-frequency region that dominated the electrochemical impedance spectra. The increase of temperature strengthened the effect of adsorption layer on NO electrochemical performance. The EIS results were fitted well with the equivalent circuit model indicating that the improved mechanism with the Ba adsorption layer may be related with the NO oxidation to NO 2 on the Pt surface, the formation of Ba (NO 3) 2 in the adsorption layer and the reduction of the reaction path from the direct Ba (NO 3) 2 decomposition.

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Ambient temperature NOx emission control for lean-burn engines by electro-catalytic tubes

Cited by 8 publications

References 30 publications

Promoted Decomposition of NO_x in Automotive Diesel-like Exhausts by Electro-Catalytic Honeycombs

Promoted Decomposition of NO_x in Automotive Diesel-like Exhausts by Electro-Catalytic Honeycombs

Nitrogen oxide electrochemical reduction characteristics on patterned platinum electrode

Effects of the Ba Impregnation on Pt Electrode on NO Electrochemical Reduction Mechanism

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Ambient temperature NOx emission control for lean-burn engines by electro-catalytic tubes

Cited by 8 publications

References 30 publications

Promoted Decomposition of NOx in Automotive Diesel-like Exhausts by Electro-Catalytic Honeycombs

Promoted Decomposition of NOx in Automotive Diesel-like Exhausts by Electro-Catalytic Honeycombs

Nitrogen oxide electrochemical reduction characteristics on patterned platinum electrode

Effects of the Ba Impregnation on Pt Electrode on NO Electrochemical Reduction Mechanism

Contact Info

Product

Resources

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Promoted Decomposition of NO_x in Automotive Diesel-like Exhausts by Electro-Catalytic Honeycombs

Promoted Decomposition of NO_x in Automotive Diesel-like Exhausts by Electro-Catalytic Honeycombs