Effect of seeding on hydrogen and carbon particle production in a 10 MW solar thermal reactor for methane decomposition

Patrianakos, Giorgos; Kostoglou, Margaritis; Konstandopoulos, Athanasios G.

doi:10.1016/j.ijhydene.2012.02.046

Cited by 12 publications

(3 citation statements)

References 30 publications

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“…Solar methane decomposition was carried out in a 5-kW directly radiated solar chemical reactor tested in a solar furnace in the temperature range of 1,300e1,600 K. Methane conversion of 95% was achieved at the residence time of 2 s with solarto-chemical energy conversion efficiency measured at 16%. Patrianakos, Kostoglou, and Konstandopoulos (2012) analyzed the effect of seeding on the solar methane decomposition rate in a 10-MW solar thermal reactor with an indirect heating option. A modeling study of the effect of carbon particles seeding on solar reactors performance was conducted by Ozalp and Kanjirakat (2010).…”

Section: Solar-powered Decomposition Of Methanementioning

confidence: 99%

Low-carbon production of hydrogen from fossil fuels

Muradov

2015

Compendium of Hydrogen Energy

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Section: Solar-powered Decomposition Of Methanementioning

confidence: 99%

Low-carbon production of hydrogen from fossil fuels

Muradov

2015

Compendium of Hydrogen Energy

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“…Patrianakos's model has been validated with experimental data of the degree of methane conversion. By using the same model, Patrianakos et al (2012) have been able to emphasize the effect of seeding on the carbon production. Lastly, a two-dimensional model of methane cracking presented by Caliot et al (2012) has been used for the simulation of a tubular reactor (Rodat et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Influence of temperature and pressure on carbon black size distribution during allothermal cracking of methane

Gautier

Rohani

Fulcheri

et al. 2015

Aerosol Science and Technology

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Allothermal cracking of methane is a suitable and eco-friendly way to simultaneously produce hydrogen and carbon black. The economic viability of the process relies on the ability to produce carbon black having well-defined characteristics, particularly concerning the particle size. A model for the study of the carbon particle size distribution during thermal cracking of methane has been developed. The model takes into account: heat transfer by conduction, convection, particle and gas radiation, homogenous and heterogenous reactions of methane dissociation, nucleation, and growth of solid carbon particle formed. The model alleges nanoparticles are in thermal equilibrium and do not impact the flow. A parametric study is made on operating pressure and temperature. As a result, the increase of the pressure and temperature increases the yield of thermal methane cracking. Moreover, results show a particle size distribution becoming narrower with increasing temperature and/or pressure. In these conditions, the particles population tends to be monodispersed.

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“…Solar thermal cracking of natural gas is an encouraging option for the production of hydrogen and carbon black as stated by Flamant et al (2011), Patrianakos et al (2012). Due to the absence of CO 2 production in the process, it is viable option for sustainable energy.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of particle deposition inside aero-shielded solar cyclone reactor: A promising solution for reactor clogging

Krishna

Özalp

2013

International Journal of Heat and Fluid Flow

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Solar cracking of methane is considered to be an attractive option due to its CO 2 free hydrogen production process. Carbon particle deposition on the reactor window, walls and exit is a major obstacle to achieve continuous operation of methane cracking solar reactors. As a solution to this problem a novel ''aeroshielded solar cyclone reactor'' was created. In this present study the prediction of particle deposition at various locations for the aero-shielded reactor is numerically investigated by a Lagrangian particle dispersion model. A detailed three dimensional computational fluid dynamic (CFD) analysis for carbon deposition at the reactor window, walls and exit is presented using a Discrete Phase Model (DPM). The flow field is based on a RNG k-e model and species transport with methane as the main flow and argon/ hydrogen as window and wall screening fluid. Flow behavior and particle deposition have been observed with the variation of main flow rates from 10-20 L/min and with carbon particle mass flow rate of 7 Â 10 À6 and 1.75 Â 10 À5 kg/s. In this study the window and wall screening flow rates have been considered to be 1 L/min and 10 L/min by employing either argon or hydrogen. Also, to study the effect of particle size simulations have also been carried out (i) with a variation of particle diameter with a size distribution of 0.5-234 lm and (ii) by taking 40 lm mono sized particles which is the mean value for the considered size distribution. Results show that by appropriately selecting the above parameters, the concept of the aero-shielded reactor can be an attractive option to resolve the problem of carbon deposition at the window, walls and exit of the reactor.

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Effect of seeding on hydrogen and carbon particle production in a 10 MW solar thermal reactor for methane decomposition

Cited by 12 publications

References 30 publications

Low-carbon production of hydrogen from fossil fuels

Low-carbon production of hydrogen from fossil fuels

Influence of temperature and pressure on carbon black size distribution during allothermal cracking of methane

Numerical investigation of particle deposition inside aero-shielded solar cyclone reactor: A promising solution for reactor clogging

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