Investigation of hydrogen production from sodium borohydride by carbon nano tube‐graphene supported PdRu bimetallic catalyst for PEM fuel cell application

Although hydrogen is the most abundant element in the universe, it is not possible to find it in its purest state in nature. In this study, two-stage experimentation was carried out. The first stage was hydrogen production. The second stage was an electrochemical process to hydrogenate soybean oil in a PEM fuel cell. In the fist stage a Zirfon Perl UTP 500 membrane was used in an alkaline hydrolizer of separated gas to produce hydrogen, achieving 9.6 L/min compared with 5.1 L/min, the maximum obtained using a conventional membrane. The hydrogen obtained was used in the second stage to feed the fuel cell hydrogenating the soybean oil. Hydrogenated soybean oil showed a substantial diminished iodine index from 131 to 54.85, which represents a percentage of 58.13. This happens when applying a voltage of 90 mV for 240 min, constant temperature of 50 °C and one atm. This result was obtained by depositing 1 mg of Pt/cm 2 in the cathode of the fuel cell. This system represents a viable alternative for the use of hydrogen in energy generation.

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Bond Graph Modeling and Simulation of Buck-Boost Converter for PEM Fuel Cell Application

2018 15th International Multi-Conference on Systems, Signals & Devices (SSD) ◽

10.1109/ssd.2018.8570396 ◽

2018 ◽

Author(s):

Wafa Ben Salem ◽

Dhia Mzoughi ◽

Abdelkader Mami

Keyword(s):

Fuel Cell ◽

Modeling And Simulation ◽

Pem Fuel Cell ◽

Bond Graph ◽

Boost Converter ◽

Fuel Cell Application ◽

Graph Modeling ◽

Bond Graph Modeling

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Morphology Study of Perfluorosulfonic Acid Ionomer for PEM Fuel Cell Application

ECS Meeting Abstracts ◽

10.1149/ma2010-02/1/26 ◽

2010 ◽

Keyword(s):

Fuel Cell ◽

Pem Fuel Cell ◽

Perfluorosulfonic Acid ◽

Morphology Study ◽

Fuel Cell Application

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Hydrogen Production for PEM Fuel Cells via Oxidative Steam Reforming of Methanol Using Cu-Al Catalysts Modified With Ce and Cr

ASME 2006 Fourth International Conference on Fuel Cell Science, Engineering and Technology, Parts A and B ◽

10.1115/fuelcell2006-97209 ◽

2006 ◽

Author(s):

Sanjay Patel ◽

K. K. Pant

Keyword(s):

Fuel Cell ◽

Hydrogen Production ◽

Surface Area ◽

Steam Reforming ◽

Pem Fuel Cell ◽

Oxide Catalysts ◽

Molar Ratio ◽

X Ray ◽

Steam Reforming Of Methanol ◽

Al Oxide

The performance of Cu-Ce-Al-oxide and Cu-Cr-Al-oxide catalysts of varying compositions prepared by co-precipitation method was evaluated for the PEM fuel cell grade hydrogen production via oxidative steam reforming of methanol (OSRM). The limitations of partial oxidation and steam reforming of methanol for the hydrogen production for PEM fuel cell could be overcome using OSRM and can be performed auto-thermally with idealized reaction stoichiomatry. Catalysts surface area and pore volume were determined using N2 adsorption-desorption method. The final elemental compositions were determined using atomic absorption spectroscopy. Crystalline phases of catalyst samples were determined by X-ray diffraction (XRD) technique. Temperature programmed reduction (TPR) demonstrated that the incorporation of Ce improved the copper reducibility significantly compared to Cr promoter. The OSRM was carried out in a fixed bed catalytic reactor. Reaction temperature, contact-time (W/F) and oxygen to methanol (O/M) molar ratio varied from 200–300°C, 3–21 kgcat s mol−1 and 0–0.5 respectively. The steam to methanol (S/M) molar ratio = 1.4 and pressure = 1 atm were kept constant. Catalyst Cu-Ce-Al:30-10-60 exhibited 100% methanol conversion and 152 mmol s−1 kgcat−1 hydrogen production rate at 300°C with carbon monoxide formation as low as 1300 ppm, which reduces the load on preferential oxidation of CO to CO2 (PROX) significantly before feeding the hydrogen rich stream to the PEM fuel cell as a feed. The higher catalytic performance of Ce containing catalysts was attributed to the improved Cu reducibility, higher surface area, and better copper dispersion. Reaction parameters were optimized in order to maximize the hydrogen production and to keep the CO formation as low as possible. The time-on-stream stability test showed that the Cu-Ce-Al-oxide catalysts subjected to a moderate deactivation compared to Cu-Cr-Al-oxide catalysts. The amount of carbon deposited onto the catalysts was determined using TG/DTA thermogravimetric analyzer. C1s spectra were obtained by surface analysis of post reaction catalysts using X-ray photoelectron spectroscopy (XPS) to investigate the nature of coke deposited.

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