Optimising the Low Temperature Performance and Regeneration Efficiency of the Continuously Regenerating Diesel Particulate Filter (CR-DPF) System

Allansson, Ronny; Blakeman, Philip G.; Cooper, Barry; Hess, Howard; Silcock, Peter J.; Walker, Andrew P.

doi:10.4271/2002-01-0428

Cited by 153 publications

(66 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additional reactions such as the oxidation of NO to NO 2 also occurs with the key interest attributed in facilitating passive diesel particulate filter (DPF) regenerations [1]- [2] as well as in enhancing the performance of some selective catalytic reductions (SCR) catalysts [3]- [4].…”

Section: Introductionmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

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

View full text Add to dashboard Cite

show abstract

“…This CRT system shows an excellent performance during a road test over 700,000 km in the presence of ultra-low sulphur diesel fuel [1]. The CRT system combines trapping of soot in a wall-flow monolith, and two chemical processes, i.e., platinum catalysed NO oxidation to NO 2 and the subsequent oxidation of trapped soot with the NO 2 produced.…”

Section: Introductionmentioning

confidence: 99%

The role of NO2 and O2 in the accelerated combustion of soot in diesel exhaust gases

Setiabudi

Makkee

Moulijn

2004

Applied Catalysis B: Environmental

285

195

View full text Add to dashboard Cite

The role of NO 2 and O 2 in the combustion of soot was investigated by analysing the soot combustion characteristic and the DRIFT spectra of surface oxygen complexes (SOCs) as soot oxidation intermediates. It is found that in NO 2 /O 2 -soot, like in the CRT system, the oxidation of soot is initiated by the NO 2 -soot reaction to create SOCs as intermediates. O 2 reacts with SOCs, eventually yielding CO and/or CO 2 . This mechanism results in a higher oxidation rate when NO 2 -soot reaction occurs in the presence of O 2 . The potential of using Printex-U, a flame soot, in exploratory diesel soot combustion studies is discussed. It is concluded that in general this is the case except for the fact that real soot can contain adsorbed hydrocarbons that will increase the reactivity of the soot in the absence of NO 2 .

show abstract

“…For example, Allansson et al demonstrated the benefits of adding a platinum-based catalyst coating to an uncatalyzed CRT DPF in low engine exhaust temperature scenarios. 19 Because engine exhaust temperature is an issue for waste collection vehicles, options that do not require meeting min exhaust temperature requirements might be better suited to this fleet, including active DPFs 2,11 or diesel oxidation catalysts. 4 There was a difference in the engine exhaust temperatures of the four vehicle types, especially between front-end and side loaders, and rear loaders and rolloffs, but not sufficient to predict success based on vehicle type.…”

Section: Discussionmentioning

confidence: 99%

Exhaust Temperature Profiles for Application of Passive Diesel Particulate Filters to Solid Waste Collection Vehicles in California

Reul-Chen

Ross

Steele

et al. 2005

Journal of the Air & Waste Management Association

View full text Add to dashboard Cite

To reduce public exposure to diesel particulate matter second-by-second engine exhaust temperature readings for one week from each vehicle. As a group, the collection vehicles exhibited low engine exhaust temperatures, making the application of passive DPFs to these vehicles difficult. Only 35% of tested vehicles met the temperature requirements for one passive DPF, whereas 60% met the temperature requirements for the other. Engine exhaust temperatures varied by vehicle type. Side and front-end loaders met the engine exhaust temperature requirements in the greatest number of cases with ϳ50Ϫ90% achieving the required regeneration temperatures. Only 8Ϫ25% of the rear loader and roll-off collection vehicles met the engine exhaust temperature requirements. Solid waste collection vehicles represent a diverse fleet with a variety of duty cycles. Low engine exhaust temperatures will need to be addressed for successful use of passive DPFs in this application.

show abstract

Optimising the Low Temperature Performance and Regeneration Efficiency of the Continuously Regenerating Diesel Particulate Filter (CR-DPF) System

Cited by 153 publications

References 0 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

The role of NO2 and O2 in the accelerated combustion of soot in diesel exhaust gases

Exhaust Temperature Profiles for Application of Passive Diesel Particulate Filters to Solid Waste Collection Vehicles in California

Contact Info

Product

Resources

About