A detailed microkinetic model for diesel engine emissions oxidation on platinum based diesel oxidation catalysts (DOC)

Sharma, Hom N.; Mhadeshwar, Ashish B.

doi:10.1016/j.apcatb.2012.08.021

Cited by 28 publications

(20 citation statements)

References 130 publications

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“…In terms of NO to NO 2 oxidation, a limit is reached for this reaction over the platinum catalyst at temperatures higher than 300ºC (Figure 6a), where NO 2 concentration is probably equilibrium limited as it has been previously suggested in [18]. Once the equilibrium is reached, NO 2 concentration starts to decrease as temperature increases.…”

Section: Resultsmentioning

confidence: 84%

Enhancing the low temperature oxidation performance over a Pt and a Pt–Pd diesel oxidation catalyst

Herreros

Gill

Lefort

et al. 2014

Applied Catalysis B: Environmental

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The influence of hydrogen over platinum and combined platinum-palladium diesel oxidation catalysts were investigated on the oxidation kinetics of CO, HC and NO. Although H 2 has been reported to have a positive effect on CO and HC oxidation as well as NO 2 formation over platinum catalysts, there is still uncertainty whether this is due to the temperature rise caused by H 2 oxidation or the result of a change in the reaction kinetics of CO, HC and NO oxidation by the production of intermediate species. The results have showed smaller H 2 concentrations are more effective in improving the catalyst light-off temperature as well as promoting NO oxidation over both platinum and platinum-palladium catalysts. It is suggested that these benefits are a result of not only the exothermic reactions which in turn increase the local catalyst temperature but also H 2 increasing the rate of reactions and the species accessibility to the catalyst active sites thus further CO, HC and NO oxidation can occur at lower catalyst temperatures.

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Section: Resultsmentioning

confidence: 84%

Enhancing the low temperature oxidation performance over a Pt and a Pt–Pd diesel oxidation catalyst

Herreros

Gill

Lefort

et al. 2014

Applied Catalysis B: Environmental

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“…Chemisorption enthalpies for the various surface species are calculated via the UBI-QEP method [27][28][29], which is widely used in fundamental microkinetic modeling studies [70][71][72][73][74][75][76][77]. This method relates the chemisorption enthalpy of a species to the atomic chemisorption enthalpies of H, C and O.…”

Section: Reaction Rate Expression Single-event Microkinetics and Thementioning

confidence: 99%

A Single-Event MicroKinetic model for the cobalt catalyzed Fischer-Tropsch Synthesis

Belleghem

Ledesma

Yang

et al. 2016

Applied Catalysis A: General

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“…Among various types of commercial platinum group metals (PGMs), Pd has been regarded as an active component in automotive converters to eliminate CO and other exhaust fumes. [3][4][5] Owing to the interaction between the metal oxide support and the active metal species, the catalytic behavior, durability and dispersion of heterogeneous Pd catalysts are closely associated with the inherent physical and chemical properties of the support. [6][7][8][9] So far, the simple metal oxides, such as CeO 2 , Co 3 O 4 , TiO 2 , ZrO 2 and MnO x , have been extensively studied for their large specic surface area.…”

Section: Introductionmentioning

confidence: 99%

Highly dispersed Pd on macroporous SmMn₂O₅ mullite for low temperature oxidation of CO and C₃H₈

Zhu

Feng

et al. 2018

RSC Adv.

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The catalytic behavior of a palladium catalyst supported on macroporous SmMn 2 O 5 mullite (Pd/SMO-EG&M) for CO and C 3 H 8 oxidation was measured under lean-burn conditions. Different analytical techniques including XRD, Raman, BET, CO chemisorption, SEM, FTEM, XPS, TPD, TPR and CO + O 2 pulse were undertaken to evaluate its physical and chemical properties. It was concluded that the crystal structure, morphology and specific surface area (SSA) of SmMn 2 O 5 remained unchanged after Pd addition. The Pd/SMO-EG&M exhibited a low complete transformation temperature for CO (105 C) and C 3 H 8 (350 C) oxidation. Such remarkable oxidation activity was attributed to high Pd dispersion (38.4%), which improved the reducibility and mobility of oxygen species, as revealed by TPR and TPD measurements. The high activity of oxygen species for Pd/SMO-EG&M above 250 C accelerated the oxidation capacity as well. In a word, our study indicates that the macroporous Pd-mullite catalyst has potential applications in exhaust purification for gasoline vehicle.

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A detailed microkinetic model for diesel engine emissions oxidation on platinum based diesel oxidation catalysts (DOC)

Cited by 28 publications

References 130 publications

Enhancing the low temperature oxidation performance over a Pt and a Pt–Pd diesel oxidation catalyst

Enhancing the low temperature oxidation performance over a Pt and a Pt–Pd diesel oxidation catalyst

A Single-Event MicroKinetic model for the cobalt catalyzed Fischer-Tropsch Synthesis

Highly dispersed Pd on macroporous SmMn₂O₅ mullite for low temperature oxidation of CO and C₃H₈

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A detailed microkinetic model for diesel engine emissions oxidation on platinum based diesel oxidation catalysts (DOC)

Cited by 28 publications

References 130 publications

Enhancing the low temperature oxidation performance over a Pt and a Pt–Pd diesel oxidation catalyst

Enhancing the low temperature oxidation performance over a Pt and a Pt–Pd diesel oxidation catalyst

A Single-Event MicroKinetic model for the cobalt catalyzed Fischer-Tropsch Synthesis

Highly dispersed Pd on macroporous SmMn2O5 mullite for low temperature oxidation of CO and C3H8

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About

Highly dispersed Pd on macroporous SmMn₂O₅ mullite for low temperature oxidation of CO and C₃H₈