Design of Mg-Cu alloys for fast hydrogen production, and its application to PEM fuel cell

2018 ◽  
Vol 741 ◽  
pp. 590-596 ◽  
Author(s):  
SeKwon Oh ◽  
HyoWon Kim ◽  
MinJoong Kim ◽  
KwangSup Eom ◽  
JoonSeok Kyung ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Hydrogen Production ◽  
Pem Fuel Cell ◽  
Cu Alloys

scholarly journals Electrochemical Hydrogen Production Using Separated-Gas Cells for Soybean Oil Hydrogenation

Processes ◽  
2020 ◽  
Vol 8 (7) ◽  
pp. 832
Author(s):  
Jorge Eduardo Esquerre Verastegui ◽  
Marco Antonio Zamora Antuñano ◽  
Juvenal Rodríguez Resendiz ◽  
Raul García García ◽  
Pedro Jacinto Paramo Kañetas ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Hydrogen Production ◽  
Soybean Oil ◽  
Constant Temperature ◽  
Pem Fuel Cell ◽  
Electrochemical Process ◽  
Second Stage ◽  
Abundant Element ◽  
Hydrogenated Soybean Oil ◽  
The Universe

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.

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

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.

Dynamic Modeling and Control Issues on a Methanol Reforming Unit for Hydrogen Production and Use in a PEM Fuel Cell

2009 ◽  
Vol 42 (11) ◽  
pp. 822-827 ◽  
Author(s):  
Dimitris Ipsakis ◽  
Spyros Voutetakis ◽  
Panos Seferlis ◽  
Simira Papadopoulou
Keyword(s):  
Fuel Cell ◽  
Hydrogen Production ◽  
Dynamic Modeling ◽  
Pem Fuel Cell ◽  
Methanol Reforming ◽  
Modeling And Control ◽  
And Control

Simulation of a hydrogen production and purification system for a PEM fuel-cell using bioethanol as raw material

2007 ◽  
Vol 164 (1) ◽  
pp. 336-343 ◽  
Author(s):  
Pablo Giunta ◽  
Carlos Mosquera ◽  
Norma Amadeo ◽  
Miguel Laborde
Keyword(s):  
Fuel Cell ◽  
Hydrogen Production ◽  
Pem Fuel Cell ◽  
Raw Material ◽  
Purification System

Highly purified hydrogen production from ammonia for PEM fuel cell

2018 ◽  
Vol 43 (31) ◽  
pp. 14486-14492 ◽  
Author(s):  
Hiroki Miyaoka ◽  
Hikaru Miyaoka ◽  
Tomoyuki Ichikawa ◽  
Takayuki Ichikawa ◽  
Yoshitsugu Kojima
Keyword(s):  
Fuel Cell ◽  
Hydrogen Production ◽  
Pem Fuel Cell

Impact of hydrogen production on optimal economic operation of a grid-parallel PEM fuel cell power plant

2006 ◽  
Vol 153 (1) ◽  
pp. 136-144 ◽  
Author(s):  
M.Y. El-Sharkh ◽  
M. Tanrioven ◽  
A. Rahman ◽  
M.S. Alam
Keyword(s):  
Fuel Cell ◽  
Power Plant ◽  
Hydrogen Production ◽  
Pem Fuel Cell ◽  
Economic Operation

A Millimeter Scale Reactor Integrated PEM Fuel Cell Energy System with an On-Board Hydrogen Production, Storage and Regulation Unit for Autonomous Small Scale Applications

2014 ◽  
Vol 93 ◽  
pp. 131-136
Author(s):  
Arvind Balakrishnan ◽  
Claas Mueller ◽  
H. Reinecke
Keyword(s):  
Fuel Cell ◽  
Hydrogen Production ◽  
Metal Hydride ◽  
Pem Fuel Cell ◽  
Hydrogen Gas ◽  
Pt Catalyst ◽  
Electrical Load ◽  
Cell Energy ◽  
Scale Reactor

We present a millimeter scale reactor integrated PEM fuel cell energy source with an onboard hydrogen production reactor (realized by alkaline chemical hydride), and passive hydrogen buffering unit (realized by metal hydride) of hydrogen. A stacked system of reactor-hydrogen buffer-PEM fuel cell is demonstrated. The system is driven by the hydrolysis of the alkaline chemical hydride (NaOH+NaBH4) in the presence of micro porous catalyst layer (platinum catalyst (Ni-Pt)). The produced hydrogen gas from the reactor is buffered through the hydrogen buffer (Palladium metal hydride) and gets distributed (due to the pressure difference) onto the anode of the PEM fuel cell. The operational behaviour of the complete system is investigated with the hydrogen produced from the alkaline chemical hydride and pure hydrogen gas. Long term voltage measurements under a defined electrical load of the alkaline chemical hydride driven system was measured. The increase in time for the hydrogen production observed in the long term voltage measurement is anticipated to the degradation of the Ni-Pt catalyst. The system is “self-buffering” in nature so any change in electrical load can be handled during system operation.

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