fulltext.study @t Gmail

Transient experiments on a full-scale DOC—Methodology and techniques to support modelling

Paper ID Volume ID Publish Year Pages File Format Full-Text
55464 47054 2012 9 PDF Available
Title
Transient experiments on a full-scale DOC—Methodology and techniques to support modelling
Abstract

A methodology was developed, which enables transient experiments to be performed on a DOC connected to a live diesel engine, while the temperature of the DOC substrate is monitored at various locations. This was demonstrated on a full-scale Pt/γ-alumina DOC (o.d. = 106 mm; length = 114 mm), connected to a Ford 2.0 L diesel engine. The engine was operated at a constant speed of 2000 rpm, and by varying the engine torque, experiments were performed at fixed gas inlet temperatures to the DOC, e.g. 150, 320 °C, and at each setting a constant background level of exhaust emissions was obtained. Then, a known quantity of pollutant (e.g. CO, propane) was injected into the exhaust, so as to create an approximated pulse input into the DOC (e.g. with peak CO concentration = 3000 ppm). The transient response of the system was monitored. So as to examine more closely local changes in response to a change in inlet conditions, experiments were also performed with a short 5 mm thin-slice of DOC (o.d. = 106 mm).These techniques enable better control to be achieved over such experiments, and provide valuable data to support mathematical modelling. It was interesting to note, that in the examples studied, there was no evidence of any significant competition between CO and THCs for the active sites.The DOC was also characterised, and it was shown that key properties can have different values depending on the location from which the sample was taken – and this would also have important implications on modelling work.

Graphical abstractSchematic of experimental configuration for transient experiments.Figure optionsDownload full-size imageDownload high-quality image (148 K)Download as PowerPoint slideHighlights► A diesel oxidation catalyst (DOC) is connected to a live engine. ► An experimental methodology is developed to aid modelling and catalyst design. ► Transient experiments are performed with the injection of CO and propane. ► The technique uses full-scale commercial DOCs and thin-slice DOCs. ► The gap is bridged between laboratory bench-top experiments and full-scale engine trials.

Keywords
DOC; Modelling; Transient experiments; CO; THCs; Site competition; Diesel engine
First Page Preview
Transient experiments on a full-scale DOC—Methodology and techniques to support modelling
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 188, Issue 1, 1 July 2012, Pages 53–61
Authors
, , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us