A thermodynamic analysis of hydrogen production by steam reforming of glycerol

Adhikari, Sushil; Fernando, Sandun; Gwaltney, Steven R.; To, S. D. Filip; Bricka, R. Mark; Steele, Philip H.; Haryanto, Agus

doi:10.1016/j.ijhydene.2007.03.023

Cited by 285 publications

(163 citation statements)

References 16 publications

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“…(6)), suggested by Adhikari et. al [12] to be responsible for the behavior of carbon dioxide production, once it depends on both WGS and methanation (eqs. (3 and 4)), which have been target of discussion already, it is implicitly already analyzed here.…”

Section: Traditional Reactor ( = )mentioning

confidence: 99%

Thermodynamic analysis of Glycerol Steam Reforming for hydrogen production with in situ hydrogen and carbon dioxide separation

Silva

Soria

Madeira

2015

Journal of Power Sources

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A thermodynamic study of Glycerol Steam Reforming (GSR) for hydrogen production with in situ carbon dioxide and hydrogen (reaction products) simultaneous removal was performed. The sorption-enhanced membrane reactor (SEMR) was divided into multiple subGibbs reactors and the Gibbs free energy minimization method was employed. The effects of temperature (600-800 K), molar water-to-glycerol feed ratio (WGFR) (3-9), pressure (1-5 atm) and fraction of hydrogen and carbon dioxide removal ( , 0-0.99) on the GSR process were target of investigation. A hydrogen yield (total moles of hydrogen produced/mole of reacted glycerol) very close to the stoichiometric value of 7 was obtained at 700 K, WGFR of 9, 1 atm and for 2 = 0.99 and 2 = 0.80. This corresponds to an enhancement of 217%, 47% and 22% in terms of hydrogen yield comparatively to the traditional reactor (TR), sorption-enhanced reactor (SER) with carbon dioxide capture ( 2 = 0.99) and membrane reactor (MR) with hydrogen separation ( 2 = 0.80), respectively. In terms of coke, its formation was only observed under WGFRs below the stoichiometric value of 3.

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Section: Traditional Reactor ( = )mentioning

confidence: 99%

Thermodynamic analysis of Glycerol Steam Reforming for hydrogen production with in situ hydrogen and carbon dioxide separation

Silva

Soria

Madeira

2015

Journal of Power Sources

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“…Such a catalyst was chosen due to its high activity and low cost. Adhikari et al (2007a) carried out a thermodynamic equilibrium analysis of hydrogen production by steam reforming of glycerol. They calculated the number of moles of hydrogen produced on the basis of minimising the Gibbs function.…”

Section: Introductionmentioning

confidence: 99%

“…To date, although there have been a few studies on the use of catalysts active for methane and/or ethanol steam reforming such as Ni-based catalysts for steam reforming of glycerol (Adhikari, et al, 2007a;2007b and2008;Czernik, et al, 2002;Douette, et al, 2007;Hirai, et al, 2005;Zhang, et al, 2007), little has been found in the literature on glycerol steam reforming with in-situ CO 2 removal. This forms the main motivation for carrying this study on the use of a commercial Ni-based catalyst and a calcined dolomite sorbent to investigate the feasibility of sorption enhanced steam reforming of glycerol for hydrogen production.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen production by sorption-enhanced steam reforming of glycerol

Dou

Dupont

Rickett

et al. 2009

Bioresource Technology

171

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Catalytic steam reforming of glycerol for H 2 production has been evaluated experimentally in a continuous flow fixed-bed reactor. The experiments were carried out under atmospheric pressure within a temperature range of 400-700C. A commercial Ni-based catalyst and a dolomite sorbent were used for the steam reforming reactions and in-situ CO 2 removal. The product gases were measured by online gas analyzers. The results show that H 2 productivity is greatly increased with increasing temperature and the formation of methane by-product becomes negligible above 500C. The results suggest an optimal temperature of ~500C for the glycerol steam reforming with in-situ CO 2 removal using calcined dolomite as the sorbent, at which the CO 2 breakthrough time is longest and the H 2 purity is highest. The * Author to whom correspondence should be addressed. Tel: 44 -113-3432503; Fax: 44 -113-2467310, v.dupont@leeds.ac.uk. 2 shrinking core-model and the 1D diffusion model describe well the CO 2 removal under the conditions of this work.

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“…Under these conditions methane production is minimized and the carbon formation is thermodynamically inhibited. Moreover, glycerol with possible contaminants (chloride and sodium ions) present in crude glycerine as byproducts of biodiesel synthesis was tested in the reformer, producing similar results [17,18]. On the other hand, catalytic steam has been tested.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen production by means pyrolysis and steam gasification of glycero

Martín¹,

González²,

Martínez³

et al. 2024

RE&PQJ

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Abstract. The objectives of this work were to optimize the variables affecting pyrolysis and steam gasification of glycerol (by-product formed during biodiesel production); and to characterize the gaseous phase formed, in order to carry out its energetic use. The studied operation variables were reaction temperature (700-900 ºC), water flow rate (0-0.173 g·min ). The most interesting phase (analyzed by gas chromatography) was the gas fraction. In this work, gas fraction was composed by H 2 , CH 4 , CO, C 2 H 6 , C 2 H 4 and CO 2 . The main gas generated was the hydrogen. Its generation was favoured by steam presence and its yield was increased in 224% in relation with pyrolysis process (default of water steam). The better conditions for studied process were 800 ºC, 0.074 g·min -1 of water flow rate, 0.009 g·min -1 of glycerol flow rate and 60 cm 3 ·min -1 of nitrogen flow rate. In these conditions, the volume of synthesis gas was 1.86 L·(g glycerol ) -1 and its higher heating value (HHV) was 26.70 MJ· (kg glycerol ) -1 . This study indicated that the bio-glycerol is an excellent raw material in the obtaining of medium heating value gases. These gases could be used as fuel in industrial furnaces or domestic use.

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A thermodynamic analysis of hydrogen production by steam reforming of glycerol

Cited by 285 publications

References 16 publications

Thermodynamic analysis of Glycerol Steam Reforming for hydrogen production with in situ hydrogen and carbon dioxide separation

Thermodynamic analysis of Glycerol Steam Reforming for hydrogen production with in situ hydrogen and carbon dioxide separation

Hydrogen production by sorption-enhanced steam reforming of glycerol

Hydrogen production by means pyrolysis and steam gasification of glycero

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