Low Temperature Active Regeneration of Soot Using Hydrogen in a Multi-Channel Catalyzed DPF Yonsei Univ

Format:

Conference/Event

Author/Creator:

Park, Park, author.

Contributor:

Chun, Kwang min

Song, Soonho

Conference Name:

SAE 2010 World Congress & Exhibition (2010-04-13 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2010

Summary:

Diesel particulate filter (DPF) systems are being used to reducethe particulate matter emissions of diesel vehicles. The DPF shouldbe regenerated after certain driving hours or distance to eliminatesoot in the filter. The most widely used method is activeregeneration with oxygen at 550~650°C. Fuel penalty occurs when theexhaust gas temperature is increased. The low temperature oxidationtechnique is needed to reduce fuel consumption.In this study, we found that hydrogen could be used to decreasethe PM oxidation temperature significantly on a catalyzed DPF(CDPF). The oxidation characteristics of PM with hydrogen suppliedto CDPF were studied using a partial flow system. The partial flowsystem was used to control temperature and a flow rateindependently. The CDPF was coated with Pt/Al₂O₃ 25g/ft₃, and amulti-channel CDPF (MC CDPF) with a square cross section of 1.65 cmwidth and length of 10 cm was used.Firstly, a hydrogen oxidation was tested for DPFs with andwithout a catalyst. The oxygen concentration was fixed at 10%, andhydrogen concentration was changed from 2% to 8%. For the DPFwithout a catalyst, there was no significant hydrogen oxidationbelow 300°C. However for the CDPF, the hydrogen oxidation startedactively over 120°C.Secondly, soot regeneration experiments were performed toinvestigate hydrogen exothermic reaction effects on soot oxidationin a CDPF. Prior to perform oxidation experiments, PM was collectedabout 8 g/L at the CDPF with a engine speed of 1500 rpm and BMEP of8 bar. Also, partial flow temperature of 200°C was used to minimizethe NO₂ passive regeneration effect. The test was carried out witha wide range of temperatures and hydrogen concentrations. Sootoxidation in the CDPF started when H₂ concentration was 3% and thetemperature was as low as 180°C. Regeneration became faster when H₂concentration was higher

Notes:

Vendor supplied data

Publisher Number:

2010-01-0562

Access Restriction:

Restricted for use by site license