Regenerative trapping: How Pd improves the durability of Pt diesel oxidation catalysts

Carrillo, Cristihan; DeLaRiva, Andrew; Xiong, Haifeng; Peterson, Eric J.; Spilde, M.; Kunwar, Deepak; Goeke, Ronald S.; Wiebenga, Michelle H.; Oh, Se H.; Qi, Gongshin; Challa, Sivakumar R.; Datye, Abhaya K.

doi:10.1016/j.apcatb.2017.06.085

Cited by 53 publications

(31 citation statements)

References 17 publications

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“…Diesel oxidation catalyst (DOC) is the core of current technologies for controlling diesel vehicle exhaust, which is used to oxidize CO and C x H y into non-toxic CO 2 and H 2 O, and oxidize NO into NO 2 to accelerate sequential fast SCR reaction (Tan et al, 2021). At present, the most common active components of DOC catalysts in industrial applications are platinum-group metals, such as Pt, Pd, etc., with transition metal oxides such as Al 2 O 3 and CeO 2 as supports (Liu et al, 2013;Liu et al, 2015;Raj et al, 2015;Carrillo et al, 2017;Ren et al, 2018;Leistner et al, 2019). Pt-group metals exhibit the excellent removal efficiency on CO, C x H y , NO, and other polluting components in diesel vehicle exhaust at low temperatures (Khosravi et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Manganese Oxide Octahedral Molecular Sieves for CO and C3H6 Oxidation at Diesel Exhaust Conditions

Wang

Tan

Guo

et al. 2021

Front. Environ. Chem.

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Mn-based materials have been widely applied in the environmental catalysis field for their excellent redox properties. Here, three kinds of crystallite manganese oxides (pyrolusite, cryptomelane and todorokite) with different tunnel sizes (MnO(1 × 1), MnO(2 × 2), and MnO(3 × 3)) were prepared by hydrothermal method, and their catalytic performance in complete oxidation of diesel vehicle exhaust were tested. The highest catalytic oxidation activity was achieved on MnO(3 × 3) when compared with that on MnO(1 × 1) and MnO(2 × 2). Via a series of characterizations, such as transmission electron microscope, scanning electron microscope, X-ray powder diffraction, N2-sorption experiments, temperature-programmed reduction by H2/CO, and X-ray photoelectron spectroscopy, etc., it was found that the catalytic activity was mainly determined by the tunnel structure, specific surface area, and redox ability.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Manganese Oxide Octahedral Molecular Sieves for CO and C3H6 Oxidation at Diesel Exhaust Conditions

Wang

Tan

Guo

et al. 2021

Front. Environ. Chem.

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“…DOC filter is used for oxidation of hydrocarbons, nitrates and soluble organic fraction. It is suitably placed before diesel particulate filter since the oxidation of nitrates can be utilized for passive regeneration of the soot in the particulate filter [16]. Precious metals like platinum, palladium and rhodium are used mostly as catalyst.…”

Section: Diesel Oxidation Catalysis (Doc)mentioning

confidence: 99%

Review on Post-Treatment Emission Control Technique by Application of Diesel Oxidation Catalysis and Diesel Particulate Filtration

Kurien¹

2019

Journal of Thermal Engineering

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The toxic nature of exhaust gases released by these engines has led to environmental concerns, affecting its sustainability. The exhaust emission from diesel engine includes carbon monoxide, nitrates, hydrocarbons and particulate matter. Soot particles contained in the particulate matter is also found to be carcinogenic in nature and also leads to various lung diseases. Diesel oxidation catalysis system involves oxidation of hydrocarbons, nitrates and soluble organic fraction. Diesel particulate filtration blocks the soot particles with the help of alternately plugged diesel particulate filter with porous walls. The regeneration of accumulated soot is one of the major challenges faced by automotive industries for effective implementation of diesel particulate filtration system. A detailed review on the challenges faced in the implementation of emission control techniques has been carried out in this study and it has been explored from the results of literature study that microwave based regeneration technique would be an effective technique. This paper provides a platform for understanding the working principle of post treatment emission control techniques and also on the role of regeneration in effective operation of Diesel Particulate Filter.

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“…11,12 Furthermore, it is known that Pd improves the stability of the Pt catalyst by increasing the barrier to sintering and lowering the PtO 2 vapor pressure through the presence of a PdO phase. 13,14 Supported Pt/Pd catalysts have been studied extensively using electron microscopy, [15][16][17][18][19][20] x-ray absorption fine structure, [21][22][23][24] infrared spectroscopy, 25,26 and temperature-programmed reduction or desorption measurements. 27,28 Pt sintering at low pressures has also been studied using environmental transmission electron microscopy (ETEM).…”

Section: Introductionmentioning

confidence: 99%

Anomalous metal vaporization from Pt/Pd/Al₂O₃under redox conditions

et al. 2021

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Regenerative trapping: How Pd improves the durability of Pt diesel oxidation catalysts

Cited by 53 publications

References 17 publications

Evaluation of Manganese Oxide Octahedral Molecular Sieves for CO and C3H6 Oxidation at Diesel Exhaust Conditions

Evaluation of Manganese Oxide Octahedral Molecular Sieves for CO and C3H6 Oxidation at Diesel Exhaust Conditions

Review on Post-Treatment Emission Control Technique by Application of Diesel Oxidation Catalysis and Diesel Particulate Filtration

Anomalous metal vaporization from Pt/Pd/Al₂O₃under redox conditions

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Regenerative trapping: How Pd improves the durability of Pt diesel oxidation catalysts

Cited by 53 publications

References 17 publications

Evaluation of Manganese Oxide Octahedral Molecular Sieves for CO and C3H6 Oxidation at Diesel Exhaust Conditions

Evaluation of Manganese Oxide Octahedral Molecular Sieves for CO and C3H6 Oxidation at Diesel Exhaust Conditions

Review on Post-Treatment Emission Control Technique by Application of Diesel Oxidation Catalysis and Diesel Particulate Filtration

Anomalous metal vaporization from Pt/Pd/Al2O3under redox conditions

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Anomalous metal vaporization from Pt/Pd/Al₂O₃under redox conditions