Hydrogen production by thermal partial oxidation of hydrocarbon fuels in porous media based reformer

Al-Hamamre, Zayed; Voss, S.; Trimis, D.

doi:10.1016/j.ijhydene.2008.10.085

Cited by 96 publications

(35 citation statements)

References 2 publications

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“…Natural convection in fluid-saturated porous materials is encountered in many applications such as molten metals infiltration in porous media [9][10][11][12], drying and transport of gases in porous media [13][14][15], enhanced oil recovery by hot-water flooding in porous beds [16], combustion of heavy oils in porous reservoirs [17,18], etc., where the thermal boundary conditions play a significant role in the overall process. Effects of thermal boundary conditions, such as sinusoidal heating and discrete heating, are reported in the literature [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Entropy Generation During Natural Convection in a Porous Cavity: Effect of Thermal Boundary Conditions

Basak

Kaluri

Balakrishnan

2012

Numerical Heat Transfer, Part A: Applications

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Entropy generation plays a significant role in the overall efficiency of a given system, and a judicious choice of optimal boundary conditions can be made based on a knowledge of entropy generation. Five different boundary conditions are considered and their effect of the permeability of the porous medium, heat transfer regime (conduction and convection) on entropy generation due to heat transfer, and fluid friction irreversibilities are investigated in detail for molten metals (Pr ¼ 0.026) and aqueous solutions (Pr ¼ 10), with Darcy numbers (Da) between 10 À5 -10 À3 and at a representative high Rayleigh number, Ra ¼ 5 Â 10 5 . It is observed that the entropy generation rates are reduced in sinusoidal heating (case 2) when compared to that for uniform heating (case 1), with a penalty on thermal mixing. Finally, the analysis of total entropy generation due to variation in Da and thermal mixing and temperature uniformity indicates that, there exists an intermediate Da for optimal values of entropy generation, thermal mixing, and temperature uniformity.

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Section: Introductionmentioning

confidence: 99%

Entropy Generation During Natural Convection in a Porous Cavity: Effect of Thermal Boundary Conditions

Basak

Kaluri

Balakrishnan

2012

Numerical Heat Transfer, Part A: Applications

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“…The use of inert porous media is common in such experiments due to the fact that their presence has been shown to improve the reaction characteristics [8].…”

Section: Thermal or Non-catalytic Partial Oxidation (Tpox)mentioning

confidence: 99%

Reforming Technologies to Improve the Performance of Combustion Systems

Hassan

Khandelwal

2014

Aerospace

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A large number of theoretical and experimental studies have shown that the performance of kerosene combustion increases significantly if combustion is being assisted by the addition of hydrogen to the fuel/air mixture during the combustion process. It reduces the amount of CO, CO 2 and NO x emissions, while increasing the flame stability limits. It also helps in bruning fuel/air mixtures at much leaner equivalence ratios. The same principle could be applied to gain benefits in gas turbine combustors. Hydrogen for this purpose could be produced by the reforming of hydrocarbon fuels using a reformer module. This paper presents key hydrogen reforming technologies which, by implementation in gas turbine combustors, hold potential for improving both their performance and service life.

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“…Soot formation during reforming of hydrocarbon fuels has been observed in several studies [5,10,15,16,27]. These mainly concerned the partial oxidation of methane-air mixtures although ethane and propane was also studied [15].…”

Section: Validation Of Numerical Modelmentioning

confidence: 99%

“…The formation of higher hydrocarbons was noted in all studies at high equivalence ratios although the soot onset limit varied due to differences in experimental setup. In some cases the size of the packing material affected the soot formation with smaller particle-packings showing less soot formation [5,27]. The bed material itself should be inert and not participate in the gas phase reaction.…”

Section: Validation Of Numerical Modelmentioning

confidence: 99%

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Modeling of soot formation during partial oxidation of producer gas

Svensson

Tunå

Hulteberg

et al. 2013

Fuel

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PostprintThis is the accepted version of a paper published in Fuel. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the original published paper (version of record):Svensson, H., Tunå, P., Hulteberg, C., Brandin, J. (2013) Modeling of soot formation during partial oxidation of producer gas. Fuel AbstractSoot formation in a reverse flow partial oxidation reactor for reforming of gasifier producer gas has been studied. The process was modeled using a detailed reaction mechanism to describe the kinetics of soot formation. The numerical model was validated against experimental data from the literature and showed good agreement with reported data. Nine cases with differing composition was simulated in order to study the effect of water content, hydrogen content and methane content of the gas. The CO and CO 2 content was also varied to study its effect on soot formation as well as the tar content of the gas. The results show that steam and hydrogen content of the inlet gas had lower influence on the soot formation than expected. The methane content greatly influenced the soot formation. Results also showed that increasing the CO 2 content of the gas reduces the amount of soot formed and gives a higher energy efficiency and methane conversion. For the case with no tars in the ingoing gas the soot formation was significantly reduced. It can be concluded that removing the tars in an energy efficient way, prior to the partial oxidation reactor, will greatly reduce the amount of soot formed. Further investigation of tar reduction is needed and experimental research of this process is undergoing.

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Hydrogen production by thermal partial oxidation of hydrocarbon fuels in porous media based reformer

Cited by 96 publications

References 2 publications

Entropy Generation During Natural Convection in a Porous Cavity: Effect of Thermal Boundary Conditions

Entropy Generation During Natural Convection in a Porous Cavity: Effect of Thermal Boundary Conditions

Reforming Technologies to Improve the Performance of Combustion Systems

Modeling of soot formation during partial oxidation of producer gas

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