The use of inert porous media based reactors for hydrogen production

Al-Hamamre, Zayed; Al-Zoubi, Ahmad

doi:10.1016/j.ijhydene.2009.11.079

Cited by 42 publications

(4 citation statements)

References 50 publications

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“…Flame stability in porous media combustion can be achieved by several techniques [24], of which two were applied in this study. One is the velocity stabilization which by adjusting the inlet gas velocity and equivalence ratio to make the flame velocity equals to the local gas flow rate.…”

Section: Flame Stability Limitsmentioning

confidence: 99%

Power and heat co-generation by micro-tubular flame fuel cell on a porous media burner

Wang

Zeng

Shi

et al. 2016

Energy

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Section: Flame Stability Limitsmentioning

confidence: 99%

Power and heat co-generation by micro-tubular flame fuel cell on a porous media burner

Wang

Zeng

Shi

et al. 2016

Energy

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“…Partial oxidation and DR in IPM, also known as filtration combustion, has been proposed as a feasible alternative to achieve high-temperature non-catalytic reforming of carbonaceous fuels, such as biogas (Zeng et al, 2017) and pure CH 4 (Drayton et al, 1998;Bingue et al, 2002;Itaya et al, 2002;Smith et al, 2013;Abdul Mujeebu, 2016). The existence of a porous solid structure within the reaction zone promotes the recirculation of heat within the reactor, thus effectively increasing the heat transfer that leads to an excess on the enthalpy of the process (Hardesty and Weinberg, 1973;Kamal and Mohamad, 2006;Al-Hamamre and Al-Zoubi, 2010;Wang et al, 2018). This phenomenon allows the formation of self-sustaining reactions over a large range of equivalence ratios (ϕ), or fuel-air ratios, resulting in syngas production without the need for any extra heating.…”

Section: Introductionmentioning

confidence: 99%

Syngas Production From the Reforming of Typical Biogas Compositions in an Inert Porous Media Reactor

et al. 2020

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Syngas production by inert porous media combustion of rich biogas-air mixtures was studied experimentally, focusing on carbon dioxide utilization and process efficiency. Different gas mixtures of natural gas and carbon dioxide, which simulated a typical biogas composition of 100:0, 70:30, 55:45, and 40:60 (CH 4 :CO 2 ), were comparatively analyzed considering combustion waves temperatures and velocities, and chemical concentrations products, at high equivalence ratios of ϕ = 1.5 and ϕ = 2.0. Different CO 2 concentrations on biogas composition showed higher H 2 productions than on pure methane (100:0), mainly due to CO 2 reforming reactions. Also, syngas production, hydrogen yields, and process efficiency by means of biogas filtration combustion were higher than under methane filtration combustion. Results of the thermochemical conversion of biogas show an alternative and promising non-catalytic technique to CO 2 utilization.

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“…In contrast to steam reforming, the exothermic partial oxidation (POX) process has a good dynamic response time and does not need external heat or water. Consequently, interest in small-scale fuel cells applying partial oxidation processes has increased. − One such partial oxidation process is the fuel-rich combustion of methane in porous media burners.…”

Section: Introductionmentioning

confidence: 99%

Elementary Reaction Modeling and Experimental Characterization on Methane Partial Oxidation within a Catalyst-Enhanced Porous Media Combustor

et al. 2016

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In this study, the fuel-rich combustion of methane in a two-layer porous media burner consisting of dense alumina pellets of different diameters was investigated experimentally and numerically. For a fixed inlet gas velocity of 0.15 m/s, methane-rich flames were stabilized near the interface of two layers for equivalence ratios from 1.4 to 1.6. It was found that 40% of the methane was converted to syngas at the equivalence ratio of 1.6 using a reforming efficiency based on low heating values. To further increase the hydrogen yield and make the burner more suitable for applications in fuel cells, a portion of the downstream layer was coated with 0.08 wt % Ni catalyst. The reforming efficiency of methane to hydrogen increased from 18.2% to 23.9% after the catalytic enhancement. A combined homogeneous and heterogeneous elementary reaction mechanism was developed for methane partial oxidation in the porous media burner with catalytic enhancement. A one-dimensional model was explored by coupling the combined mechanism with heat-transport and mass-transport processes within the burner. The modeled temperature profiles and gas compositions showed good agreement with the experimental results. The model is demonstrated to be a useful tool for understanding the reaction processes within the burner and for burner design optimization. The nickel catalyst mainly promoted the water–gas shift reaction, and the heterogeneous reactions were dominant in the region where the catalyst was loaded. The burner design was optimized by studying the effects of the pellet diameter, layer length, and catalyst loading on the reforming efficiencies.

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The use of inert porous media based reactors for hydrogen production

Cited by 42 publications

References 50 publications

Power and heat co-generation by micro-tubular flame fuel cell on a porous media burner

Power and heat co-generation by micro-tubular flame fuel cell on a porous media burner

Syngas Production From the Reforming of Typical Biogas Compositions in an Inert Porous Media Reactor

Elementary Reaction Modeling and Experimental Characterization on Methane Partial Oxidation within a Catalyst-Enhanced Porous Media Combustor

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