Sensitivity of process efficiency to reaction routes in exhaust-gas reforming of diesel fuel

Tsolakis, Athanasios; Golunski, Stanislaw E.

doi:10.1016/j.cej.2005.12.017

Cited by 46 publications

(37 citation statements)

References 21 publications

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“…5 cm) was in this temperature range (Figure 2b). As it has been reported in an earlier publication, the height, width and position of the temperature peak responded to changes in the gas feed flow rate [9]. With increasing space velocity, the maximum temperature increased, the temperature peak shifted further downstream the catalyst bed and at the same time the temperature of the gases leaving the reactor was also increased.…”

Section: Temperature Profilessupporting

confidence: 63%

“…This was a key outcome from our earlier work [2,9,23] but also by more recent work on partial oxidation by Horn et al [24][25][26]. However, because these reactions occur consecutively at different stages of the catalyst bed, each providing new reactants and conditions downstream, the reaction rates of each reaction are affected differently by the monolith configuration (as well as the fuel type) [2].…”

Section: Exhaust Gas Reforming -Equilibrium Calculationsmentioning

confidence: 84%

“…aspect ratio) [2,9]. The latest studies have significantly advanced reforming technology for automotive applications.…”

Section: Introductionmentioning

confidence: 99%

“…However, the demands made of a reformer in an REGR system [9] can be quite different to those required for promoting aftertreatment. As we have reported recently, the hydrocarbon-SCR activity window for a 1%Pt/Al 2 O 3 catalyst is shifted and also expanded towards lower inlet gas temperatures when H 2 is added in the gas feed [21].…”

Section: Introductionmentioning

confidence: 99%

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

Abu-Jrai¹,

Tsolakis²,

Theinnoi³

et al. 2008

Chemical Engineering Journal

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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.

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Section: Temperature Profilessupporting

confidence: 63%

Section: Exhaust Gas Reforming -Equilibrium Calculationsmentioning

confidence: 84%

“…aspect ratio) [2,9]. The latest studies have significantly advanced reforming technology for automotive applications.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Abu-Jrai¹,

Tsolakis²,

Theinnoi³

et al. 2008

Chemical Engineering Journal

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“…Although the authors have published a number of papers regarding engine operation with REGR mainly with standard diesel fuels [18][19][20], the different properties of GTL are expected to influence differently the partially premixed combustion patterns and the engine performance and emissions.…”

Section: Introductionmentioning

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

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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.

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Methanol as an Alternative Fuel in Internal Combustion Engine: Scope, Production, and Limitations

Bansal

Meena

2021

Energy, Environment, and Sustainability

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Sensitivity of process efficiency to reaction routes in exhaust-gas reforming of diesel fuel

Cited by 46 publications

References 21 publications

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

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

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

Methanol as an Alternative Fuel in Internal Combustion Engine: Scope, Production, and Limitations

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