Experimental study of the supercritical water reforming of glycerol without the addition of a catalyst

Ortiz, F.J. Gutiérrez; Serrera, A.; Galera, S.; Ollero, P.

doi:10.1016/j.energy.2013.04.046

Cited by 47 publications

(10 citation statements)

References 43 publications

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“…Glycerol is the main by-product of the biodiesel production by transesterification of vegetable oils [3]. Due to the increase in biodiesel production, crude glycerol, consisting of glycerol, methanol/ethanol, soap, catalyst, and organic matter, has led to increase simultaneously while its prices are low [4].…”

Section: Introductionmentioning

confidence: 99%

“…Since supercritical water has advantage properties such as a low dielectric constant that affects to the solubility of components in supercritical water. The solubilize capacity for organic compounds increase and inorganic compounds decrease and thus, reaction time and the requirement of energy in reactor are decrease [3,9]. Moreover, supercritical water is not only a processing medium but also a catalyst in reforming reaction [3].…”

Section: Introductionmentioning

confidence: 99%

“…The solubilize capacity for organic compounds increase and inorganic compounds decrease and thus, reaction time and the requirement of energy in reactor are decrease [3,9]. Moreover, supercritical water is not only a processing medium but also a catalyst in reforming reaction [3]. Interestingly, the synthesis gas obtained from supercritical water reforming has high pressure and thus, it is easily and directly to store.…”

Section: Introductionmentioning

confidence: 99%

“…Performance of an Integrated Adsorption-Enhanced Glycerol Supercritical Water Reforming and Pressurized SOFC SystemYaneeporn Patcharavorachot 1 ,*, Worarat Rattanachai 1 , Dang Saebea 2 , Suthida Authayanun3 , and Amornchai Arpornwichanop 4…”

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confidence: 99%

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Performance of an Integrated Adsorption-Enhanced Glycerol Supercritical Water Reforming and Pressurized SOFC System

2016

IJACEBS

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Glycerol supercritical water reforming is a promising process for hydrogen production. The hydrogen product has high pressure and temperature and thus, it can be used as fuel in pressurized solid oxide fuel cells (SOFC). However, the synthesis gas obtained from reforming process contains high amount of CO 2 and this leads to the deterioration of SOFC performance. Consequently, the adsorption process is used to remove CO 2 from the synthesis gas before feeding into SOFCs. This work aimed to develop models of an integrated system of adsorption-enhanced glycerol supercritical water reforming process and pressurized SOFC. The AspenPlus TM simulation software was used to calculate the equilibrium compositions of the products from reforming process by the minimization of Gibbs free energy method. The SOFC performance can be computed by electrochemical equations taking into account three voltage losses (activation, ohmic and concentration losses). Effect of operating conditions of SOFC (temperature, pressure and current density) was examined to identify the optimal operating condition. The simulation results indicated that the optimal conditions for SOFC are temperature of 900 °C, pressure of 4 atm and current density of 10,000 A/m 2. The glycerol reformer which is operated at temperature of 800 o C, pressure of 240 atm and steam to glycerol molar ratio of 10 can provide the hydrogen product of 87% (dry basis). When the synthesis gas is fed into SOFC operated under the optimal condition, it was found that the integrated system can be achieved the SOFC efficiency of 71.56%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Performance of an Integrated Adsorption-Enhanced Glycerol Supercritical Water Reforming and Pressurized SOFC System

2016

IJACEBS

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“…"Glycerol steam reforming," BioResources 11(4), 10173-10189. 10175 reforming (APR) (Cortright et al 2002;Manfro et al 2011;Menezes et al 2011;Tuza et al 2013), and supercritical water (SCW) reforming reactions (Byrd et al 2008;Gutiérrez Ortiz et al 2013;Pairojpiriyakul et al 2013). However, steam reforming has attracted the most attention, partially due to the fact that the process is widely used in industry, and it would require only minor alterations in existing systems if the feedstock was changed from natural gas or naphtha to glycerol (Silva et al 2015).…”

Section: H Ooc R R Oh R Coor C H Oh  €mentioning

confidence: 99%

Effect of Active Metal Supported on SiO2 for Selective Hydrogen Production from the Glycerol Steam Reforming Reaction

Charisiou¹,

Papageridis²,

Siakavelas³

et al. 2016

BioResources

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The performance of nickel, cobalt, and copper supported on silica as catalysts was evaluated for the glycerol steam reforming (GSR) reaction. The samples were characterized by nitrogen-porosimetry according to Brunauer-Emmett-Teller (BET) method, X-ray diffraction (XRD), and inductively coupled plasma atomic emission spectroscopy (ICP-AES), while the deposited carbon on the catalytic surface was measured with a CHN-analyzer. Catalysts were studied in order to investigate the effect of the reaction temperature on (i) glycerol total conversion, (ii) glycerol conversion to gaseous products, (iii) hydrogen selectivity and yield, (iv) selectivity of gaseous products, and (v) selectivity of liquid products. The results showed that the Ni based on silica (Ni/Si) catalyst was more active and produced less liquid effluents than the catalysts that used an active metal such as Co or Cu. Moreover, the H2 yield from the Ni/Si catalyst was very close to the theoretical maximum predicted by thermodynamics, and the CO2 production was favoured in comparison to CO production, which is important for use in fuel cells.

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Performance assessment of a 10 kW pressurized solid oxide fuel cell integrated with glycerol supercritical water reforming

Patcharavorachot

Chatrattanawet

Saebea

et al. 2022

Intl J of Energy Research

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Summary In this work, the integrated system of pressurized solid oxide fuel cell (SOFC) and supercritical water reforming of glycerol was proposed. The syngas from the reforming process has high temperature and pressure and thus, it can be used as fuel for the SOFC. The performance of an integrated system was determined through the Aspen Plus simulator in which the electrochemical equations were also included. The developed model was employed to examine the performance of the integrated system with respect to the wider ranges of operation of the reformer and SOFC. In this work, the desired power output of an SOFC stack is set as 10 kW and thus, the area of an SOFC is determined. A smaller area is required as it normally leads to a lower fabrication cost for the SOFC. The simulation results revealed that the smallest SOFC area can be provided when the reformer is operated at 800°C and 240 atm with a ratio of supercritical water to glycerol as 50 whereas the SOFC operation is at 900°C and 4 atm with the current density as 7000 A/m2. Under these operating conditions, the integrated system can provide the cell voltage, required area, fuel utilization, and SOFC efficiency as 1 V, 1.42 m2, 75% and 61%, respectively. From the exergy analysis, it was found that the compressor, heater, and turbine are the highest exergy destruction units whereas the reformer has the lowest exergy destruction, followed by the SOFC stack.

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Experimental study of the supercritical water reforming of glycerol without the addition of a catalyst

Cited by 47 publications

References 43 publications

Performance of an Integrated Adsorption-Enhanced Glycerol Supercritical Water Reforming and Pressurized SOFC System

Performance of an Integrated Adsorption-Enhanced Glycerol Supercritical Water Reforming and Pressurized SOFC System

Effect of Active Metal Supported on SiO2 for Selective Hydrogen Production from the Glycerol Steam Reforming Reaction

Performance assessment of a 10 kW pressurized solid oxide fuel cell integrated with glycerol supercritical water reforming

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