Catalytic exhaust gas fuel reforming for diesel engines?effects of water addition on hydrogen production and fuel conversion efficiency

Tsolakis, Athanasios; Megaritis, A.

doi:10.1016/j.ijhydene.2004.01.001

Cited by 67 publications

(50 citation statements)

References 17 publications

(33 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The full engine test rig has been described in detail in previous publications [1,3]. The engine is an air-cooled, single-cylinder, direct injection diesel engine equipped with a Pump-Line- A reforming catalyst with a nominal composition of 1%Rh/CeO 2 -ZrO 2 (by weight) was used.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Diesel exhaust-gas reforming for H2 addition to an aftertreatment unit

Abu-Jrai¹,

Tsolakis²,

Theinnoi³

et al. 2008

Chemical Engineering Journal

View full text Add to dashboard Cite

The work described in this paper has been undertaken as part of the design of an integrated system comprising a diesel engine, an exhaust-gas fuel reformer and a NO x aftertreatment unit. The exhaustgas reformer is used to provide hydrogen-rich reformate to the NO x aftertreatment unit, containing a hydrocarbon-SCR catalyst, in order to improve its NO x reduction activity at low exhaust-gas temperatures. The reformer configuration and operating parameters have been examined in order to optimise the performance of the hydrocarbon-SCR catalyst, which is promoted by the presence of H 2 but inhibited by CO. The length of the catalyst bed inside the reformer is a key factor in determining the extent to which the water-gas shift reaction can contribute to the reforming process, and therefore strongly influences the proportions of CO and H 2 in the reformate. However, it is also necessary for the reactant ratios at the reformer inlet to be controlled in response to changes in the engine operating conditions. In practice this means that the rate of fuel addition to the reformer needs to be optimised for different exhaust gas compositions and space velocities.

show abstract

Section: Methodsmentioning

confidence: 99%

“…The potential application of exhaust gas fuel reforming in internal combustion (IC) engines has been extensively studied, and the features that the reformer and catalyst design need to fulfil have been documented [1][2][3]. The technique involves reaction of fuel with engine exhaust gas (i.e.…”

Section: Introductionmentioning

confidence: 99%

Diesel exhaust-gas reforming for H2 addition to an aftertreatment unit

Abu-Jrai¹,

Tsolakis²,

Theinnoi³

et al. 2008

Chemical Engineering Journal

View full text Add to dashboard Cite

show abstract

“…Tsolakis & Megaritis (2004b) experimentally studied the reforming of RME-based biodiesel and diesel in comparison and had found that the former produced more hydrogen (up to 17%) with higher fuel conversion efficiency. The appropriated addition of reformer fuel and water to the reformer promotes reactions, yielding more hydrogen production even in the low temperature diesel exhaust gas conditions (Tsolakis & Megaritis, 2004a). Though the reformer fuel added to produce REGR is required, the produced hydrogen-rich gas, substituting part of the main engine fuel resulted in improved fuel economy, during closeloop engine-reformer operation (Tsolakis et al, 2005).…”

Section: Other Automotive Applications Of Biodieselmentioning

confidence: 99%

The Use of Biodiesel in Diesel Engines

Chuepeng¹

2011

Biodiesel- Quality, Emissions and by-Products

View full text Add to dashboard Cite

“…In this way the effect of REGR obtained under different reforming conditions could be studied. The REGR compositions were selected on the basis of diesel exhaust gas-assisted fuel reforming results that have been published previously [22,23]. The 15% H 2 -10% CO composition corresponds to the situation where the exothermic water gas shift reaction (i.e.…”

Section: Testing Conditions and Fuelsmentioning

confidence: 99%

Performance, combustion and emissions of a diesel engine operated with reformed EGR. Comparison of diesel and GTL fuelling

Abu-Jrai

Rodríguez–Fernández

Tsolakis

et al. 2009

Fuel

View full text Add to dashboard Cite

In this work, the effects of a standard ultra low sulphur diesel (ULSD) fuel and a new, ultra-clean synthetic GTL (gas-to-liquid) fuel on the performance, combustion and emissions of a single cylinder, direct injection, diesel engine were studied under different operating conditions with addition of simulated reformer product gas, referred to as reformed EGR (REGR). For this purpose various levels of REGR of two different compositions were tested. Tests with standard EGR were also carried out for comparison. Experiments were performed at four steady state operating conditions and the brake thermal efficiency, combustion process and engine emission data are presented and discussed. In general, GTL fuel resulted in a higher brake thermal efficiency compared to ULSD but the differences depended on the engine condition and EGR/REGR level and composition. The combustion pattern was significantly modified when the REGR level was increased. Although the extent of the effects of REGR on emissions depended on the engine load, it can be generally concluded that an optimal combination of GTL and REGR significantly improved both NOx and smoke emissions. In some cases, NOx and smoke emission reductions of 75% and 60%, respectively, were achieved compared to operation with ULSD without REGR. This offers a great potential for engine manufacturers to meet the requirements of future emission regulations.

show abstract

Catalytic exhaust gas fuel reforming for diesel engines?effects of water addition on hydrogen production and fuel conversion efficiency

Cited by 67 publications

References 17 publications

Diesel exhaust-gas reforming for H2 addition to an aftertreatment unit

Diesel exhaust-gas reforming for H2 addition to an aftertreatment unit

The Use of Biodiesel in Diesel Engines

Performance, combustion and emissions of a diesel engine operated with reformed EGR. Comparison of diesel and GTL fuelling

Contact Info

Product

Resources

About