Efficient heat allocation in the two-step ethanol steam reforming and solid oxide fuel cell integrated process

Tippawan, Phanicha; Im-orb, Karittha; Arpornwichanop, Amornchai

doi:10.1016/j.energy.2017.05.145

Cited by 10 publications

(2 citation statements)

References 37 publications

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“…It implies that, operating ethanol steam reforming at temperature above 1173 K can eliminate CO 2 formation and favours hydrogen production (Likkasith et al 2014). Phanicha et al (2017) reported that removal of CO 2 or very little presence of it in syngas composition results to higher hydrogen yield, based on Le Chatelier's principle.…”

Section: Carbon (Iv) Oxide (Co 2 ) Formationmentioning

confidence: 99%

Thermodynamic Phase Equilibrium Composition Determination of Ethanol Steam Reforming by Direct Minimization of Gibbs Free Energy Using Peng-Robinson Property Method

Isah

Eterigho

Olutoye

et al. 2023

Preprint

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Thermodynamic equilibrium analysis of ethanol steam reforming was carried out by direct minimization of Gibbs free energy method using Aspen Plus (V8.8). Equilibrium compositions of each species were analysed for temperatures ranging from 873 to 1173K, steam-to-ethanol molar ratios (S/C) of 2:1 -6:1 and pressure at 1atm. Due to high temperature and reduction of CO2, there is shift in equilibrium which resulted to increase in hydrogen formation. The predominant reactions which contributed to the increase in hydrogen formation are incomplete ethanol steam reforming, ethanol decomposition, methane steam reforming and water-gas shift reaction, which in turn make H2/CO ratio significant, with regard to steam-to-ethanol feed ratio of 6. Methane formation is negligible when the reforming is operated between 1093K and 1173K for all the steam-to-ethanol molar feed ratios. This implies that higher carbon deposition (4.17×10-23 kmol/s) observed at 1173K with respect to steam-to-ethanol molar feed ratio 2 could be due to methane decomposition, Boudouard reaction and CO2 reduction. However, the least rate of carbon deposition is 2.48×10-23 kmol/s relating to feed ratio 6 at 1173K, which implies that high carbon formation is significant at temperature above 1173K and steam-to-ethanol molar feed ratio 2. In view of the high H2/CO ratio attained within the considered temperatures (873-1173K) and steam-to-ethanol molar feed ratio of 6, the syngas is recommended to be used for electricity generation via solid oxide fuel cell.

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Section: Carbon (Iv) Oxide (Co 2 ) Formationmentioning

confidence: 99%

Thermodynamic Phase Equilibrium Composition Determination of Ethanol Steam Reforming by Direct Minimization of Gibbs Free Energy Using Peng-Robinson Property Method

Isah

Eterigho

Olutoye

et al. 2023

Preprint

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“…Consequently, carbon deposition on the cell electrode reduces the kinetics of the ethanol steam reforming reaction, thereby increasing the non-ohmic polarization of the cell (35). Additionally, the ohmic polarization also slightly increased as indirectly caused by carbon deposits that can block the flow of reactant gases to the active sites of the electrode (49). Figure 8(d) shows that the polarization curve of the HEA/GDC anode appears larger than that of the Ni/YSZ anode, which is expected due to lower reforming rate.…”

Section: Post-test Analysis Of Reforming Catalystmentioning

confidence: 99%

Development of High-Entropy Alloy (HEA) Anode for Carbon-Free and Electrochemically-Stable Operation of SOFC on Hydrocarbon Fuels

Lee¹,

Singh²,

Hu³

et al. 2023

ECS Trans.

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High-entropy alloy (HEA) anode, consisting of multicomponent alloy and gadolinium-doped ceria (GDC) powders, were synthesized and evaluated for ethanol steam reforming under SOFC operating conditions using a fixed-bed reactor as well as electrochemical performance using a button cell test configuration. Both bench-top and cell tests were conducted at 700 °C with a steam-to-carbon (S/C) ratio of 2. While Ni anode showed filamentary carbon formation, and performance degradation with time, HEA/GDC catalyst showed stable performance without carbon deposition. As an anode, HEA/GDC demonstrated high electrochemical stability and comparable current density compared to the Ni electrode.

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Energy-exergy analysis of an integrated small-scale LT-PEMFC based on steam methane reforming process

Wang

Mao

et al. 2021

Energy Conversion and Management

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Efficient heat allocation in the two-step ethanol steam reforming and solid oxide fuel cell integrated process

Cited by 10 publications

References 37 publications

Thermodynamic Phase Equilibrium Composition Determination of Ethanol Steam Reforming by Direct Minimization of Gibbs Free Energy Using Peng-Robinson Property Method

Thermodynamic Phase Equilibrium Composition Determination of Ethanol Steam Reforming by Direct Minimization of Gibbs Free Energy Using Peng-Robinson Property Method

Development of High-Entropy Alloy (HEA) Anode for Carbon-Free and Electrochemically-Stable Operation of SOFC on Hydrocarbon Fuels

Energy-exergy analysis of an integrated small-scale LT-PEMFC based on steam methane reforming process

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