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RESEARCH PAPERS

Simulation of Biomass and/or Coal Gasification Systems Integrated With Fuel Cells

[+] Author and Article Information
A. Ersoz, E. Caglayan, H. Olgun

 TUBITAK Marmara Research Center, Institute of Energy, 41470 Gebze, Kocaeli, Turkey

S. Ozdogan

 Marmara University, Faculty of Engineering, Dept. of Mechanical Engineering, 34722 Goztepe, Istanbul, Turkey

J. Fuel Cell Sci. Technol 3(4), 422-427 (Mar 23, 2006) (6 pages) doi:10.1115/1.2349523 History: Received December 06, 2005; Revised March 23, 2006

This paper presents the results of a system simulation study. The HYSYS 3.1 - ASPEN code has been used for simulation. The system consists of a fixed bed gasifier followed by reforming and clean-up units. The produced hydrogen gas is fed to a PEM fuel cell. The gasified hydrocarbons are hazelnut shells, bark, rice straw, animal waste, and two lignites. Hydrocarbon properties, gasification, and reforming process parameters all affect the system efficiency. The effect of the moisture content and oxygen to carbon ratio of the hydrocarbon feeds on the fuel processing and overall system efficiencies are presented. The overall efficiency of the system increases with increasing hydrocarbon feed oxygen to carbon ratio; this tendency is more evident at higher moisture levels.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

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Figure 1

The investigated inlet and outlet stream temperature ranges for the reactors

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Figure 2

The polarization curve

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Figure 3

Major fuel cell system units of the Aspen-HYSYS simulation

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Figure 4

Effect of O/C on fuel processing efficiency (at PROX exit) for selected moisture contents

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Figure 5

Effect of O/C on overall efficiency for selected moisture contents

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Figure 6

Effect of O/C ratios on LHV of the gasifier exit gases for selected moisture contents

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Figure 7

The effect of moisture content on CO (a) and H2 (b) concentrations of the gasifier exit gases for selected hydrocarbon fuel

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Figure 8

Gas concentrations

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Figure 9

Energy flows for the gasifier

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Figure 10

Energy flows for PEM fuel cell

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