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PEM technology

12 Anolyte/catholyte electrolyte placed in the anodic/cathodic compartment. [Pg.56]

Name Location Capacity for hydrogen production in Nm Maximum pressure (bar) [Pg.57]

Current receiver / Polymer Current distributor Channels [Pg.58]

The effort in terms of development seems to be greater than that for alkaline technology. Besides seeking to drive down costs and achieve a longer lifetime, two other objectives in terms of performances are envisaged  [Pg.59]

Laboratory electrolyzers producing several L/min use PEM technology. We can cite the following companies which commercialize such devices SCHMIDLIN, MATHESON GAS, DOMNICK HUNTER, PEAK and CLAIND. [Pg.59]


The electrocatalytic oxidation of methanol has been widely investigated for exploitation in the so-called direct methanol fuel cell (DMFC). The most likely type of DMFC to be commercialized in the near future seems to be the polymer electrolyte membrane DMFC using proton exchange membrane, a special form of low-temperature fuel cell based on PEM technology. In this cell, methanol (a liquid fuel available at low cost, easily handled, stored, and transported) is dissolved in an acid electrolyte and burned directly by air to carbon dioxide. The prominence of the DMFCs with respect to safety, simple device fabrication, and low cost has rendered them promising candidates for applications ranging from portable power sources to secondary cells for prospective electric vehicles. Notwithstanding, DMFCs were... [Pg.317]

London s first fleet of fuel cell taxis went into operation in 1998. The ZEVCO Millennium vehicle appears to be a standard London taxi, but it has an alkaline fuel cell (most carmakers use PEM technology). The fuel cell charges a battery array used to power the electric motor. The fuel cell... [Pg.133]

Arthur D. Little has carried out cost structure studies for a variety of fuel cell technologies for a wide range of applications, including SOFC tubular, planar and PEM technologies. Because phenomena at many levels of abstraction have a significant impact on performance and cost, they have developed a multi-level system performance and cost modeling approach (see Figure 1-15). At the most elementary level, it includes fundamental chemical reachon/reactor models for the fuel processor and fuel cell as one-dimensional systems. [Pg.48]

Since 1985, Canada has been one of the pioneers in the development of PEM technologies and applications. Largely through cost-shared agreements with the private sector, one of the most successful developments has been the Ballard PEM fuel cell - which is used in many of the fuel cell vehicles currently in demonstration/operation today. [Pg.31]

Switzerland - the Paul Scherrer Institute demonstrated its PEM technology in combination with supercaps, first in a VW Bresa (January 2002) and later in a car with improved performance (October 2004). [Pg.40]

The Danish national research strategy for developing fuel cells concentrates on SOFC and PEM technologies and includes the following objectives ... [Pg.91]

The publicly-funded fuel cell research program started in 1985, with the main activities performed at the Energy research Centre ofthe Netherlands (ECN). Between 1985 and 2001, about 100 million was invested by mixed public-private funds in the development of fuel cell and hydrogen energy. The objectives ofthe Dutch fuel cell programs were initially oriented to the application of coal gas in MCFC based systems. The MCFC activities were terminated in 2001, after an evaluation failed to indicate its commercial viability with natural gas. Afterwards, the activities shifted to SOFC and PEM technology for high efficient conversion of natural gas in small-scale decentralised units. [Pg.160]

The US is developing "advanced electrolysis - low temperature electrolysis using alkaline and PEM technologies (electrochemical compression, improved efficiency, lower cost, integration of renewable resources), and "high temperature solid oxide electrolysis under a US 3.5 million program. [Pg.191]

The hybrid sulphur (HyS) cycle utilises the same H2S04 decomposer and acid concentration section as the S-I plant. The S02 electrolysers are polymer electrolyte membrane (PEM) technology. The hydrogen plant is coupled to two NHSS and produces 4.0 kg/s of product. Oxygen is sold as a by-product. The Rankine bottoming cycle generates 133 MWe for the electrolysis section and an additional 198 MWe is imported. [Pg.337]

Ernst W, (2000). PEM technology development at Plug Power. 2000 Fuel Cell Seminar Program and Abstracts, Portland Oregon... [Pg.76]

PEM technology was originally developed as part of the Gemini space program.16 In a PEM electrolyzer, the electrolyte is contained in a thin, solid ion-conducting membrane rather than the aqueous solution in the alkaline electrolyzers. This allows the H+ ion (proton) or hydrated water molecule (HsO+) to transfer from the anode side of the membrane to the cathode side, and separates the hydrogen and oxygen... [Pg.46]

In order to overcome the problem of the short distance range, researches on proton membrane fuel cell (PEM) technology for EV application are underway in many places. [Pg.81]

AECL is working with several Canadian PEM developers to apply its heterogeneous catalyst expertise (developed for processes to produce and purify heavy water) to PEM technology. Early work suggests that a significant reduction in platinum loading may be achievable. [Pg.98]

Today, PEM technology is the clear favorite for such uses. With the exception of the Toyota effort and the Renault-Peugeot effort, most of the efforts depend in one way or another—so far at least—on Ballard technology. Daimler-Benz, Honda, Nissan, Volkswagen, and Volvo have had contracts with Ballard at various times. [Pg.274]

The direct methanol fuel cell is a special form of low-temperature fuel cells based on PEM technology. In the DMFC, methanol is directly fed into the fuel cell without the intermediate step of reforming the alcohol into hydrogen. Methanol is an attractive fuel option because it can be produced from natural gas or renewable biomass resources. It has the advantage of a high specific energy density, since it is liquid at operation conditions. The DMFC can be operated with liquid or gaseous methanoFwater mixtures. [Pg.313]

In addition, alkaline systems need to be kept on a certain operation temperamre. PEM electrolyzers can be switched off completely, which eliminates operation expenditures (OPEX). A purge with inert gas or the implementation of a protective voltage to prevent electrodes from decomposing is not necessary for the accurate operation of the PEM technology either. And a PEM system will start immediately after being switched on without any pre-heating phase which is needed if an alkaline system is in use. [Pg.211]

To fulfil those requirements, Siemens will foster the upscaling of PEM electrolysis systems, based on long-term experience in all necessary domains, starting at the PEM technology and the production of the electrodes, the heavy duty rectifiers, the control system, power supply and know-how regarding production, industrial applications and maintenance. Homework has been done, targets are crystal clear. [Pg.222]

Grigoriev, S.A., Millet, P., Porembsky, V.I., and Fateev, V.N. (2011) Development and preliminary testing of a unitized regenerative fuel cell based on PEM technology. Int. J. Hydrogen Energy, 36, 4164-4168. [Pg.243]

Normally, the kinetics of ORR and OER occurring at the cathode of fuel cells, including direct methanol fuel cells (DMFCs) is very slow. In order to speed up the ORR kinetics to reach a practical usable level in a fuel cell, ORR catalyst is needed at the air cathode. Platinum (Pt)-based materials are the most practical catalysts used in PEM technology. These Pt-based catalysts are too expensive to make fuel cells commercially viable, and hence extensive research over the past several decades has been focused on development of alternative catalysts. These alternative electrocatalysts include noble metals and allo37S, carbon materials, quinone and its derivatives, transition metal macrocyclic compounds, transition metal chalcogenides, transition metal carbides and transition metal oxides. In this chapter, we focus on both noble and nonnoble electrocatalysts being used in air cathodes and the kinetics and mechanisms O2 reduction/oxidation reaction (both ORR and OER), catal37zed by them. [Pg.111]


See other pages where PEM technology is mentioned: [Pg.293]    [Pg.364]    [Pg.31]    [Pg.56]    [Pg.121]    [Pg.128]    [Pg.140]    [Pg.223]    [Pg.28]    [Pg.236]    [Pg.237]    [Pg.238]    [Pg.390]    [Pg.775]    [Pg.121]    [Pg.127]    [Pg.128]    [Pg.51]    [Pg.63]    [Pg.158]    [Pg.160]    [Pg.45]    [Pg.1]    [Pg.141]    [Pg.581]    [Pg.93]    [Pg.113]    [Pg.305]    [Pg.925]    [Pg.191]   


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