Hydrogen production from rich combustion in porous media

Pedersen-Mjaanes, H.; Chan, Louis K. M.; Mastorakos, Epaminondas

doi:10.1016/j.ijhydene.2004.05.006

Cited by 125 publications

(43 citation statements)

References 16 publications

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“…In [3], the test data for a burner consisting of two porous layers with different properties in which the flame is confined to the interface are presented. This device proved to be sufficiently effective in burning vapors of a methanol-isooctane mixture with Φ 4, but in the case of methane it was actually impossible to move from the boundary of self-sustaining combustion (Φ 1.64).…”

Section: Udc 53646mentioning

confidence: 99%

“…The majority of scientific publications are devoted to the investigation of various designs in which the reaction mixture is heated in porous media. Devices of this type are compact since they are characterized by very high volume heat transfer coefficients.In [3], the test data for a burner consisting of two porous layers with different properties in which the flame is confined to the interface are presented. This device proved to be sufficiently effective in burning vapors of a methanol-isooctane mixture with Φ 4, but in the case of methane it was actually impossible to move from the boundary of self-sustaining combustion (Φ 1.64).…”

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Conversion of methane to hydrogen in a reversible flow superadiabatic inert porous medium reactor

Al-Abbadi

Al-Musa

Dmitrenko

et al. 2011

J Eng Phys Thermophy

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UDC 536.46Using the analysis of the experimental data on partial oxidation of methane as an example, we have shown that the chemical processes in the inert medium of a reciprocating flow reactor can be modeled with good accuracy by the standard kinetic scheme for homogeneous processes due to the fact that the gas flow in the region of combustion is described by two temperatures -the gas and framework temperatures. Such a modification of the chemical model requires neither changing the recognized mechanism of homogeneous chemistry nor correcting the volume heat transfer coefficient.Keywords: partial oxidation, superadiabatic effect. Introduction. The intensive development of hydrogen power engineering stimulates the investigation of various methods of hydrogen production. At the present time the most effective method of its production is conversion of the hydrocarbon raw material. The technology of steam-water conversion of methane to syngas is traditionally used in the large-tonnage chemical industry. The decrease in the cost of oxygen and the increase in the cost of natural gas stimulated intensive studies of the technologies of syngas production based on partial oxidation of hydrocarbons. The energy efficiency of such a method is higher and practically independent of the power of the reactor as opposed to the steam-water conversion in which losses increase on going to medium and low productivities.Steam-water conversion of methane to syngas is an endothermal process, i.e., it requires external heating of reactors. Partial oxidation, on the contrary, proceeds with heat release, but the thermal effect of the chemical reactions is relatively low in the sense that without preheating such mixtures do not burn in a free-space. One solution of this problem is the use of catalysts, which are not cheap and have a limited service life. Another, catalyst-free solution requires preheating of the reaction mixture or the use of oxygen as an oxidizer. For example, in [1] a methane-oxygen mixture with Φ = 2.5 was burned in a chamber with a pressure of the order of 30 bar without preheating. In [2], methane with air is first heated and then burned at pressures of 8-5 bars. The majority of scientific publications are devoted to the investigation of various designs in which the reaction mixture is heated in porous media. Devices of this type are compact since they are characterized by very high volume heat transfer coefficients.In [3], the test data for a burner consisting of two porous layers with different properties in which the flame is confined to the interface are presented. This device proved to be sufficiently effective in burning vapors of a methanol-isooctane mixture with Φ 4, but in the case of methane it was actually impossible to move from the boundary of self-sustaining combustion (Φ 1.64).In porous reactors operating under stationary conditions, heating of the mixture is provided by the processes of counter-flow heat transfer due to the radiative heat exchange between the solid phase elements. Devices with a moving...

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Section: Udc 53646mentioning

confidence: 99%

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confidence: 99%

Conversion of methane to hydrogen in a reversible flow superadiabatic inert porous medium reactor

Al-Abbadi

Al-Musa

Dmitrenko

et al. 2011

J Eng Phys Thermophy

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“…The fuels used in porous combustion systems are basically of gaseous form due to fluidity, volumetric capacity, and shorter mixing length scale [14][15][16][17][18][19][20][21]. Liquid fuel reactors have been developed and used to a smaller extent [22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Filtration Combustion

Torres¹,

Huerta²

2012

Hydrogen Energy - Challenges and Perspectives

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“…Another group of alternative processes of syngas production includes processes based on the combustion of a rich methane-air mixture in porous ceramic burners [6,7]. In so doing, the combustion zone is stabilized either at the boundaries of the ceramics or packed bed layers having different pore sizes [6] or by means of a platinum screen located at a certain distance from the ceramic burner surface [7].…”

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Hydrogen production in a reversible flow filtration combustion reactor

Dmitrenko

Klevan

2011

J Eng Phys Thermophy

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536.46The noncatalytic process of syngas production by means of partial oxidation of methane by air oxygen in a reversible flow filtration combustion reactor has been investigated experimentally. We have investigated the influence of the equivalent ratio and the specific mass flow of the fuel mixture on the composition of conversion products and the maximum temperature in the reaction zone. The optimal conditions for the process providing the most effective conversion of methane to syngas have been established. The concentration of hydrogen is maximal for the equivalent ratio γ = 2.8 and the specific flow rate g = 1.8 kg ⁄ (m 2 ⋅s).

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Hydrogen production from rich combustion in porous media

Cited by 125 publications

References 16 publications

Conversion of methane to hydrogen in a reversible flow superadiabatic inert porous medium reactor

Conversion of methane to hydrogen in a reversible flow superadiabatic inert porous medium reactor

Hybrid Filtration Combustion

Hydrogen production in a reversible flow filtration combustion reactor

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