On-Board Hydrogen for High Temperature PEM Fuel Cell Stack by Methane and Methanol Steam Reforming

2008 ◽  
Author(s):  
Panini Kolavennu ◽  
Susanta K. Das ◽  
K. Joel Berry
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Steam Reforming ◽  
Simulation Analysis ◽  
Pem Fuel Cells ◽  
Fuel Cell Stack ◽  
Fuel Processor ◽  
Auxiliary Power Unit ◽  
Auxiliary Power ◽  
High Temperature Pem

In this study, an in-house testing facility was used to examine the effect of CO concentration on the high temperature PEM fuel cells. Using the CO tolerance as a design parameter, a fuel processor based on steam reforming is designed using both methane and methanol as fuel. A simulation analysis based on a kinetic model is performed to investigate both methane and methanol as fuel for a potential source of hydrogen. Using simulation results, an analysis of the fuel processor and fuel cell stack is performed. The effect of steam to carbon ratio and reformer operating temperature on the overall reformer system’s performance is studied. The system was designed for a 5kWe auxiliary power unit (APU) which can be used as a combined heat and power generation system.

Experimental and Theoretical Performance Analysis of a High Temperature PEM Fuel Cell Fed With LPG Using a Compact Steam Reformer

2011 ◽  
Author(s):  
Nicola Zuliani ◽  
Rodolfo Taccani ◽  
Robert Radu
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Cell System ◽  
Operating Conditions ◽  
Steam Reformer ◽  
Fuel Cell Performance ◽  
Fuel Processor ◽  
Balance Of Plant ◽  
Energy Balances ◽  
High Temperature Pem

High temperature PEM (HTPEM) fuel cell based on polybenzimidazole polymer (PBI) and phosphoric acid, can be operated at temperature between 120°C and 180°C. Reactants humidification is not required and CO content up to 1% in fuel can be tolerated, affecting only marginally performance. This is what makes HTPEM fuel cells very attractive, as low quality reformed hydrogen can be used and water management problems are avoided. This paper aims to present the preliminary experimental results obtained on a HTPEM fuel cell fed with LPG using a compact steam reformer. The analysis focus on the reformer start up transient, on the influence of the steam to carbon ratio on reformate CO content and on the single fuel cell performance at different operating conditions. By analyzing the mass and energy balances of the fuel processor, fuel cell system, and balance-of-plant, a previously developed system simulation model has been used to provide critical assessment on the conversion efficiency for a 1 kWel system. The current study attempts to extend the previously published analyses of integrated HTPEM fuel cell systems.

Dynamic Analysis and Diagnostics of a High Temperature PEM Fuel Cell Stack

2013 ◽  
Vol 50 (2) ◽  
pp. 745-751
Author(s):  
Y. Zhu ◽  
W. H. Zhu ◽  
B. J. Tatarchuk
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Dynamic Analysis ◽  
Pem Fuel Cell ◽  
Fuel Cell Stack ◽  
High Temperature Pem

Long term testing of start–stop cycles on high temperature PEM fuel cell stack

2015 ◽  
Vol 277 ◽  
pp. 312-316 ◽  
Author(s):  
Arvind Kannan ◽  
Alexander Kabza ◽  
Joachim Scholta
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Pem Fuel Cell ◽  
Fuel Cell Stack ◽  
High Temperature Pem

Experimental Evaluation of CO Poisoning of an Air-Breathing High Temperature PEM Fuel Cell Stack

2008 ◽  
Author(s):  
Susanta K. Das ◽  
Antonio Reis ◽  
Etim U. Ubong ◽  
K. Joel Berry
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
System Performance ◽  
Pem Fuel Cell ◽  
Co Poisoning ◽  
Fuel Cell Stack ◽  
Current Voltage ◽  
Different Temperatures ◽  
Current Voltage Characteristics ◽  
High Temperature Pem

In this paper, we experimentally studied an air breathing high temperature PEM fuel cell at steady operating conditions to investigate the effects of CO poisoning at different temperatures ranges between 120°C∼180°C. The effects of changes in temperatures with different amount of CO poisoning on the current-voltage characteristics of the fuel cell are investigated. Experimental data of this type would be very useful to develop design parameters of fuel processor based on reformate hydrocarbons. The high CO tolerance of high temperature PEM fuel cells makes it possible to use the reformate gas directly from the reformer without further CO removal. Here we considered the fact that a steam reformer is a consumer of heat and water, and fuel cell stacks are a producer of heat and water. Thus, integration of the fuel cell stack and the reformer is expected to improve the system performance. The results obtained from the experiments showed variations in current-voltage characteristics at different temperatures with different CO poisoning rates. The results will help to understand the overall system performance development strategy of high temperature PEM fuel cell in terms of current-voltage characteristics, when fed with on-site reformate hydrogen gas with variable CO concentrations.

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