การจำลองแบบเซลล์เชื้อเพลิงแบบเมมเบรนแลกเปลี่ยนโปรตอน

Modeling of Proton Exchange Membrane Fuel Cell

Name: ประภาภรณ์ รักต้นตระกูล

Organization : มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

keyword: Proton Exchange Membrane Fuel Cell (PEMFC)

; Modeling

; CO-Oxidation

Abstract: A one-dimensional non-isothermal model of a proton exchange membrane (PEM) fuel cell has been developed to study the effect of operating condition and cell component properties on cell performance, and to understand the polarization phenomena in PEMFC. Furthermore, the effect of CO poisoning of fuel cell was presented in terms of cell polarization. The fundamental of mass and energy transport was applied to develop the mathematical model of PEMFC. The predicted results were compared to the experimental results obtained from Springer et al. The operating temperature can enhance the reaction kinetics and reduce the ohmic loss in membrane by increasing the proton conductivity. However excessive high cell temperature reduces the amount of liquid water in membrane significantly that increases the resistance of proton transport. The high operating pressure will increase the cell potential in PEMFC due to the increased concentration of reactant. The relative humidity of anode gas stream reveals that the water management in anode side is very important for high operation of PEMFC. The high relative humidity of anode gas stream can reduce the membrane resistance to proton transport. The cell configuration parameters that were focused on for reducing the potential loss in PEMFC were the increase of active surface area and the increase of gas permeability. Both parameters result in the decrease in activation loss in cathode catalyst layer. The cell potential decreased rapidly with the increase of CO concentration. Since CO blocks the active sites for hydrogen oxidation, the rate of hydrogen oxidation is decreased and hence the anode over potential is increased. The way to reduce this problem is to reduce CO adsorption or to enhance CO oxidation. For example, the concept of bilayer anodes for improve reformate tolerance or air-bleeding should be proposed to solve CO poisoning problem.

มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Address: กรุงเทพมหานคร (Bangkok)

Email: info.lib@mail.kmutt.ac.th

Name: Assoc.Prof. Apichai Therdthianwong

Role: Supervisor

Created: 2546

Issued: 2005-10-12

Modified: 2006-05-09

วิทยานิพนธ์/Thesis

ISBN: 9741833431

CallNumber: CHE1425

tha

DegreeName: Master of Engineering

Level: Master's Degree

Descipline: Chemical Engineering

Grantor: King Mongkut's University of Technology Thonburi

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