Hydrogen production by auto-thermal reforming of ethanol on Rh/Al2O3 catalyst

Cavallaro, S.; Chiodo, V.; Vita, Antonio; Freni, S.

doi:10.1016/s0378-7753(03)00437-3

Cited by 172 publications

(73 citation statements)

References 15 publications

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“…Those results are coherent also with other experimental reports published elsewhere [17][18][19] and allow the reader to design experiments to establish the secure noncarbon deposition conditions.…”

Section: Results and Discussion Of Mgfesupporting

confidence: 89%

Thermodynamic Analysis of the Hydrogen Production from Ethanol: First and Second Laws Approaches

Casas-Ledón

Arteaga-Pérez

Morales-Perez

et al. 2012

ISRN Thermodynamics

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A thermodynamic analysis of hydrogen production from ethanol steam reforming (ESR) is carried out in the present paper. The influence of reactants molar ratio feed into the reforming stage (2.5 < mol Water /mol EtOH < 8), temperature (573 to 1173 K) and pressure (1 < P < 10 atm) over equilibrium compositions is studied. The direct method employed to analyze the system is the minimization of Gibbs free energy (MGFE) in conjunction with Lee-Kesler state equation, using the Kay mixing rules. The temperature and reactants molar ratio showed a positive influence on the hydrogen yield; ethanol conversion is 100% for the whole interval analyzed while the pressure affected greatly the hydrogen production. The carbon deposition exhibits a maximum value at temperatures around 773 K, and three reactions are proposed to describe the solid carbon formation in a wide temperature range based on thermodynamics and experimental predictions. The conditioning stages (mixing, vaporization, and heating) are studied in addition to the reaction to analyze the system quality by means of an exergetic method applying the 2nd law of thermodynamic.

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Section: Results and Discussion Of Mgfesupporting

confidence: 89%

Thermodynamic Analysis of the Hydrogen Production from Ethanol: First and Second Laws Approaches

Casas-Ledón

Arteaga-Pérez

Morales-Perez

et al. 2012

ISRN Thermodynamics

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“…Up to now, still few studies are present in literature. [62,191,192] Aqueous phase reforming (APR) is a flexible process to produce H 2 from biomass-derived oxygenates, such as sugars, ethylene glycol, glycerol, and alcohols, in a single step process using supported metals and metal alloys as heterogeneous catalysts. [193,194] The APR of oxygenated hydrocarbons has several advantages over the CSR, namely: [184] (1) no need of reagent vaporization, which is critical for oxygenated hydrocarbons with a low vapour pressure, for example, sorbitol;…”

Section: Thermochemical Hydrogen Productionmentioning

confidence: 99%

Next‐Generation Biofuels: Survey of Emerging Technologies and Sustainability Issues

Zinoviev¹,

et al. 2010

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Next-generation biofuels, such as cellulosic bioethanol, biomethane from waste, synthetic biofuels obtained via gasification of biomass, biohydrogen, and others, are currently at the center of the attention of technologists and policy makers in search of the more sustainable biofuel of tomorrow. To set realistic targets for future biofuel options, it is important to assess their sustainability according to technical, economical, and environmental measures. With this aim, the review presents a comprehensive overview of the chemistry basis and of the technology related aspects of next generation biofuel production, as well as it addresses related economic issues and environmental implications. Opportunities and limits are discussed in terms of technical applicability of existing and emerging technology options to bio-waste feedstock, and further development forecasts are made based on the existing social-economic and market situation, feedstock potentials, and other global aspects. As the latter ones are concerned, the emphasis is placed on the opportunities and challenges of developing countries in adoption of this new industry.

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“…Ethanol can be converted into hydrogen through steam reforming (SR) [2][3][4][5], partial oxidation (PO) [6][7][8][9], and autothermal steam reforming (ATR) [10]. PO and ATR processes have the merit of fast start-up time because of the exothermic nature of the oxidation reaction.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of steam reforming of ethanol for hydrogen generation

Wang

2008

Int. J. Energy Res.

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SUMMARYThermodynamic equilibrium of ethanol steam reforming has been studied by Gibbs free energy minimization method for hydrogen production in the ranges of water-to-ethanol ratio from 0 to 20, reaction temperature from 400 to 2000 K, pressure from 1 to 60 atm, argon-to-ethanol ratio from 0 to 100. The optimal conditions suitable for the use in molten carbonate fuel cell and solid oxide fuel cell were obtained as follows: 900-1200 K, water-to-ethanol ratio of 3:6, and 1 atm. Under the optimal conditions, complete conversion of ethanol, 60.52-83.58% yield of hydrogen and 32.82-79.60% yield of carbon monoxide could be obtained and no coke forms. Higher pressures have a negative effect, but inert gases have a positive effect, on the hydrogen yield. Coke tends to form at lower temperatures and lower waterto-ethanol ratios.

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Hydrogen production by auto-thermal reforming of ethanol on Rh/Al2O3 catalyst

Cited by 172 publications

References 15 publications

Thermodynamic Analysis of the Hydrogen Production from Ethanol: First and Second Laws Approaches

Thermodynamic Analysis of the Hydrogen Production from Ethanol: First and Second Laws Approaches

Next‐Generation Biofuels: Survey of Emerging Technologies and Sustainability Issues

Thermodynamic analysis of steam reforming of ethanol for hydrogen generation

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