The benefits of ethanol use for hydrogen production in urban transportation

Silveira, José Luz; Braga, Lúcia Filgueiras; Souza, Antonio Carlos Caetano de; Antunes, Júlio Santana; Zanzi, Rolando

doi:10.1016/j.rser.2009.06.032

Cited by 59 publications

(29 citation statements)

References 16 publications

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“…An exergy balance applied to a system provides information on the wasted work potential during a process as a result of irreversibilities (exergy destruction or lost work) defined also as second-law efficiency [3,36]. An exergy analysis is a powerful tool for optimizing thermodynamic systems and can be used to identify which components of the system are responsible for irreversibilities, or lost work.…”

Section: Exergy Analysis Of the Systemsmentioning

confidence: 99%

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Exergy Analysis of an Intermediate Temperature Solid Oxide Fuel Cell-Gas Turbine Hybrid System Fed with Ethanol

et al. 2012

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Abstract:In the present work, an ethanol fed Solid Oxide Fuel Cell-Gas Turbine (SOFC-GT) system has been parametrically analyzed in terms of exergy and compared with a single SOFC system. The solid oxide fuel cell was fed with hydrogen produced from ethanol steam reforming. The hydrogen utilization factor values were kept between 0.7 and 1. The SOFC's Current-Volt performance was considered in the range of 0.1-3 A/cm 2 at 0.9-0.3 V, respectively, and at the intermediate operating temperatures of 550 and 600 °C, respectively. The curves used represent experimental results obtained from the available bibliography. Results indicated that for low current density values the single SOFC system prevails over the SOFC-GT hybrid system in terms of exergy efficiency, while at higher current density values the latter is more efficient. It was found that as the value of the utilization factor increases the SOFC system becomes more efficient than the SOFC-GT system over a wider range of current density values. It was also revealed that at high current density values the increase of SOFC operation temperature leads in both cases to higher system efficiency values.

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Section: Exergy Analysis Of the Systemsmentioning

confidence: 99%

“…Ethanol is a promising source of hydrogen as it is produced from biomass in a renewable way providing a closed carbon loop. Moreover ethanol has high hydrogen content and low toxicity [3].…”

Section: Introductionmentioning

confidence: 99%

Exergy Analysis of an Intermediate Temperature Solid Oxide Fuel Cell-Gas Turbine Hybrid System Fed with Ethanol

et al. 2012

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“…Solar, wind and hydroelectric power plants are the most used energy sources in many countries, especially in Brazil [1] . The increasing petroleum consumption and the current concerns about climate changes have driven many researchers to the development of materials and devices for energy conversion technologies, such as photovoltaic devices and fuel cells.…”

Section: Introductionmentioning

confidence: 99%

“…These devices are intended to supply power for small stationary, vehicular and mobile applications [2,3] . Among the different power sources available for electric energy conversion, fuel cells (FC) exhibit many advantages, particularly zero carbon emission, when using hydrogen as fuel [1] . FC are devices in which the chemical energy is converted into electric energy via electrocatalytic reactions and are characterized mainly by the electrolyte and fuel used, as in alkaline fuel cells (AFC); phosphoric acid fuel cells (PAFC); molten carbonate fuel cells (MCFC); solid oxide fuel cells (SOFC) and, in proton exchange membrane fuel cells (PEMFC, also known as polymer electrolyte membrane fuel cells), the polymeric membrane is responsible for the H + transport [4,5] .…”

Section: Introductionmentioning

confidence: 99%

Proton conductive membranes based on poly(styrene-co-allyl alcohol) Semi-IPN

Loureiro¹,

Marins²,

Anjos³

et al. 2014

Polímeros

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Abstract:The optimization of fuel cell materials, particularly polymer membranes, for PEMFC has driven the development of methods and alternatives to achieve systems with more adequate properties to this application. The sulfonation of poly(styrene-co-allyl alcohol) (PSAA), using sulfonating agent:styrene ratios of 2:1, 1:1, 1:2, 1:4, 1:6, 1:8 and 1:10, was previously performed to obtain proton conductive polymer membranes. Most of those membranes exhibited solubility in water with increasing temperature and showed conductivity of approximately 10 -5 S cm -1. In order to optimize the PSAA properties, especially decreasing its solubility, semi-IPN (SIPN) membranes are proposed in the present study. These membranes were obtained from the diglycidyl ether of bisphenol A (DGEBA), curing reactions in presence of DDS (4,4-diaminodiphenyl sulfone) and PSAA. Different DGEBA/PSAA weight ratios were employed, varying the PSAA concentration between 9 and 50% and keeping the mass ratio of DGEBA:DDS as 1:1. The samples were characterized by FTIR and by electrochemical impedance spectroscopy. Unperturbed bands of PSAA were observed in the FTIR spectra of membranes, suggesting that chemical integrity of the polymer is maintained during the synthesis. In particular, bands involving C-C stretching (1450 cm -1 ), C=C (aromatic, ~ 3030 cm .

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“…O Brasil só produz etanol de cana, enquanto que em outros países, como os EUA, o etanol pode ser produzido a partir do milho (Crago et al, 2010;Dias et al, 2009;Silveira, 2009;Smeets et al, 2008).…”

Section: Etanolunclassified

Espectroscopia De Cavidade Ressonante Do Tipo Ring-Down (Crds) Como Ferramenta Para a Determinação Da Distribuição Isotópica De Carbono

MARTINS¹

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The benefits of ethanol use for hydrogen production in urban transportation

Cited by 59 publications

References 16 publications

Exergy Analysis of an Intermediate Temperature Solid Oxide Fuel Cell-Gas Turbine Hybrid System Fed with Ethanol

Exergy Analysis of an Intermediate Temperature Solid Oxide Fuel Cell-Gas Turbine Hybrid System Fed with Ethanol

Proton conductive membranes based on poly(styrene-co-allyl alcohol) Semi-IPN

Espectroscopia De Cavidade Ressonante Do Tipo Ring-Down (Crds) Como Ferramenta Para a Determinação Da Distribuição Isotópica De Carbono

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