100

n.a.

* Calculated on the basis of a 20 % ROI + 10 % amortization on investment costs

** Depending upon the size

*** Calculated on the basis of 100 Nm3 H2/h n.a Not Available

Altogether, volume, unit costs, reliability, committement to user's requirements add in anticipating the high competitiveness of a CSPOM based fuel economy with respect to most traditional means of a syngas and/or H2 generation. As with addition of some proper gas cleanup processes, the quality of gas can be adjusted to fit the requirements of even the most demanding fuel cells (PAFCs, SPEFCs), the "as claimed" CSPOM concept should be considered of a more general validity and strategical importance. Table III summarizes the main advantages (and disadvantage) of the Methane Partial Oxidation System versus the various fuel cell generations.

Conclusions

In the framework of the JOULE II Programme, the CNR-TAE Institute , Messina, developed a Hydrogen Generator for Fuel Cells based on the Catalytic Partial Oxidation of Methane (CSPOM). In this respect an analysis, to provide background for applications of the CSPOM

Table III: Main advantages and disadvantages of the Hydrogen Generator via Methane

Partial Oxidation System versus different Fuel Cells.

Partial Oxidation System versus different Fuel Cells.

Table III: Main advantages and disadvantages of the Hydrogen Generator via Methane

Fuel Cell

Adantages

Disadvantages

Solid Polymer Electrolyte

* Very fest answer to the load variations

* Compactness

* Reliability

* Low Cost

* Need of the WGSR and CO Selective Oxidation subsystem

* Need to optimize the exhaust hydrogen of the fuel cell

* Need to optimize the thermal balance

Phosphoric Acid

* Very fast answer to the load variations

* Compactness

* Reliability

* Low Cost

* Need of the WGSR subsystem

* Need to optimize the exhaust hydrogen of the fuel cell

* Need to optimize the thermal balance

Molten Carbonate and

Solid Oxide

* Direct use of the gas outgoing from the CSPOM

* Very fast answer to the load variations

* Compactness

* Reliability

* Low Cost

* Need to optimize the thermal balance

concept to the fijel cell technology, has been carried out. Particularly, different hydrogen generators have been analyzed to identify the better system to be integrated with the different generations of fuel cells; an economic comparison has, also, been accomplished between the methane partial oxidation system and the methane steam reforming. The basic schemes and the detailed configuration of the Hydrogen Generator-Fuel Cell (Solid Polymer Electrolyte, Phosphoric Acid, Molten Carbonate, Solid Oxide) have been identified. The analysis gave an indicative, although firm, estimate of savings in investments and utility consumption per unit energy produced by such integrated systems, confirming the technical and economical advantages of the Catalytic Partial Oxidation System versus the classic Steam Reforming.

References

[1] V. Recupero et al. " Theoretical and experimental studies for a compact H2 generator, via catalytic partial oxidation of CH4, integrated with second generation fuel cells". Contract JOU2-CT93-0290, First periodic report covering the period from February 1st to July 31, 1994.

[2] V. Recupero et al." Theoretical and experimental studies for a compact H2 generator, via catalytic partial oxidation of CH4, integrated with second generation fuel cells". Contract JOU2-CT93-0290, Second periodic report covering the period from August 1st, 1994 to January 31, 1995.

[3] V. Recupero et al." Theoretical and experimental studies for a compact H2 generator, via catalytic partial oxidation of CH4, integrated with second generation fuel cells". Contract JOU2-CT93-0290, Third periodic report covering the period from February 1st, 1995 to July 31, 1995.

[4] KTI, Mannesmann Group, Private Communication (1994).

[5] T. Sudset, J. Sogge and T. Strom, Proc. 4th European Workshop on Methane Activation, Eindhoven, The Nederlands, May 16-17 (1994).

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