NOx emission control for automotive lean-burn engines by electro-catalytic honeycomb cells

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

doi:10.1016/j.cej.2012.06.078

Cited by 13 publications

(5 citation statements)

References 35 publications

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“…The simplified catalytic system, without consuming any reductant, that a new generation catalytic converter (electrochemical-catalytic cells, ECCs) can have a very compact size to be used for lean-burn motor vehicles [19–21]. Authors offered the transformation process of ions on the catalysis (shown in Figure 2) [22].…”

Section: Reaction Mechanismmentioning

confidence: 99%

Recent Developments of Electrochemical Promotion of Catalysis in the Techniques of DeNOx

Tang

Xu²,

et al. 2013

The Scientific World Journal

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Electrochemical promotion of catalysis reactions (EPOC) is one of the most significant discoveries in the field of catalytic and environmental protection. The work presented in this paper focuses on the aspects of reaction mechanism, influencing factors, and recent positive results. It has been shown with more than 80 different catalytic systems that the catalytic activity and selectivity of conductive catalysts deposited on solid electrolytes can be altered in the last 30 years. The active ingredient of catalyst can be activated by applying constant voltage or constant current to the catalysts/electrolyte interface. The effect of EPOC can improve greatly the conversion rate of NOx. And it can also improve the lifetime of catalyst by inhibiting its poisoning.

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Section: Reaction Mechanismmentioning

confidence: 99%

Recent Developments of Electrochemical Promotion of Catalysis in the Techniques of DeNOx

Tang

Xu²,

et al. 2013

The Scientific World Journal

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“…Honeycomb sandwich has shown a remarkable impression on mechanical performance by bringing high the stiffness/weight and strength/weight ratios, which are supported by complicated structure for weight reduction. The target productions were implemented for several applications such as the automotive, naval, and transportation industries (Zinno et al, 2011;Huang et al, 2012;Crupi et al, 2013;Partridge & Choi, 2017). The mechanical performance could be varied based on the structure due to varied size, thickness, and shape, but the main contribution was on an array of hollow cells built between thin vertical walls.…”

Section: Introductionmentioning

confidence: 99%

Effect of Natural Fibers Reinforcement of Honeycomb Sandwich Using Numerical Analysis

Zulkarnain¹,

Tofrowaih²,

Ariyanti³

2022

IJTech

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The honeycomb sandwich structure has been extensively investigated for its mechanical performance. Modification in improving such mechanical properties is an innovation required for honeycomb sandwiches, especially by adding a random fibers reinforcement inside a sheet panel plate. This study was developed random fiber reinforcement using natural fiber of Oil Palm, Sugar Cane, and Coconut, which constructed by the commercial software code of MATLAB. This investigation analyzed the performance of three-point bending behavior using the finite-element model, which provides four levels of fiber condition to observed: 0, 50, 100, and 150 fiber numbers. Ansys Workbench/Dynamic code was chosen to predict mechanical performance such as stress and displacement analysis. In the fiber development study, a series of numerical simulations were carried out with two types of fiber orientation reinforcement, unidirectional and chopped randomly. The hybrid orientation was also implemented in this research by combining unidirectional and chopped fiber, which was fixed at 150 numbers and then varied in three sets: S50/C100, S100:C50, and S75/C75. As a result, it was confirmed that the fiber reinforcement enhances the stiffness of the structure, which contributed a lot to the promotion of the bending resistance capacity and energy absorption. Especially, unidirectional fiber orientation has shown a significant increase in absorbing stress during testing. The fiber reinforcement sandwich demonstrated better mechanical behavior in the simulation, as reported by the hybrid system, and this was influenced by the unidirectional orientation.

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“…Metal clusters,p articularly noblem etals, comprising af ew to tens of atoms with as ize of < 2.0 nm, have received tremendous attention owing to their unique metallic nature and welldefined surface chemistry. [5] The exceptional activity of noblem etals (Au, Pt, Pd, Rh, etc.) [3][4] For instance, automobile exhaust gas treatment (e.g.,t he controllede mis-sion of CO and NO x )h as been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Synthesis and Catalytic Properties of Encapsulated Metal Clusters within Zeolitic Imidazolate Frameworks

Wang

Liu

et al. 2016

Chemistry A European J

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It is very interesting and also a big challenge to encapsulate metal clusters within microporous solids to expand their application diversity. For this target, herein, we present an electrochemical synthesis strategy for the encapsulation of noble metals (Au, Pd, Pt) within ZIF-8 cavities. In this method, metal precursors of AuCl , PtCl , and PdCl are introduced into ZIF-8 crystals during the concurrent crystallization of ZIF-8 at the anode. As a consequence, very small metal clusters with sizes around 1.2 nm are obtained within ZIF-8 crystals after hydrogen reduction; these clusters exhibit high thermal stability, as evident from the good maintenance of their original sizes after a high-temperature test. The catalytic properties of the encapsulated metal clusters within ZIF-8 are evaluated for CO oxidations. Because of the small pore window of ZIF-8 (0.34 nm) and the confinement effect of small pores, about 80 % of the metal clusters (fractions of 0.74, 0.77, and 0.75 for Au, Pt, and Pd in ZIF-8, respectively) retain their catalytic activity after exposure to the organosulfur poison thiophene (0.46 nm), which is in contrast to their counterparts (fractions of 0.22, 0.25, and 0.20 for Au, Pt, and Pd on the SiO support). The excellent performances of metal clusters encapsulated within ZIF-8 crystals give new opportunities for catalytic reactions.

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NOx emission control for automotive lean-burn engines by electro-catalytic honeycomb cells

Cited by 13 publications

References 35 publications

Recent Developments of Electrochemical Promotion of Catalysis in the Techniques of DeNOx

Recent Developments of Electrochemical Promotion of Catalysis in the Techniques of DeNOx

Effect of Natural Fibers Reinforcement of Honeycomb Sandwich Using Numerical Analysis

Electrochemical Synthesis and Catalytic Properties of Encapsulated Metal Clusters within Zeolitic Imidazolate Frameworks

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