The Effect of Ammonia on Hydrogen‐Air Phosphoric Acid Fuel Cell Performance

1980 ◽  
Vol 127 (7) ◽  
pp. 1440-1444 ◽  
Author(s):  
S. T. Szymanski ◽  
G. A. Gruver ◽  
M. Katz ◽  
H. R. Kunz
Keyword(s):  
Fuel Cell ◽  
Phosphoric Acid ◽  
Cell Performance ◽  
Fuel Cell Performance ◽  
Phosphoric Acid Fuel Cell

scholarly journals Petroleum Diesel and Biodiesel Fuels Used in a Direct Hydrocarbon Phosphoric Acid Fuel Cell

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Yuanchen Zhu ◽  
André Y. Tremblay ◽  
Glenn A. Facey ◽  
Marten Ternan
Keyword(s):  
Steady State ◽  
Fuel Cell ◽  
Phosphoric Acid ◽  
Carbonaceous Material ◽  
Cell Performance ◽  
Feed System ◽  
Fuel Cell Performance ◽  
Phosphoric Acid Fuel Cell ◽  
Diesel Fuels ◽  
Steady State Operation

The performance of a direct hydrocarbon phosphoric acid fuel cell, PAFC, was investigated using petroleum diesel, biodiesel, and n-hexadecane as the fuels. We believe this is the first study of a fuel cell being operated with petroleum diesel as the fuel at the anode. Degradation in fuel cell performance was observed prior to reaching steady state. The degradation was attributed to a carbonaceous material forming on the surface of the anode. Regardless of the initial degradation, a steady-state operation was achieved with each of the diesel fuels. After treating the anode with water the fuel cell performance recovered. However, the fuel cell performance degraded again prior to obtaining another steady-state operation. There were several observations that were consistent with the suggestion that the carbonaceous material formed from the diesel fuels might be a reaction intermediate necessary for steady-state operation. Finally, the experiments indicated that water in the phosphoric acid electrolyte could be used as the water required for the anodic reaction. The water formed at the cathode could provide the replacement water for the electrolyte, thereby eliminating the need to provide a water feed system for the fuel cell.

scholarly journals Novel phosphoric acid-doped PBI-blends as membranes for high-temperature PEM fuel cells

2015 ◽  
Vol 3 (20) ◽  
pp. 10864-10874 ◽  
Author(s):  
Florian Mack ◽  
Karin Aniol ◽  
Corina Ellwein ◽  
Jochen Kerres ◽  
Roswitha Zeis
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Fuel Cell ◽  
Phosphoric Acid ◽  
Chemical Stability ◽  
Pem Fuel Cells ◽  
Cell Performance ◽  
Acid Base ◽  
Fuel Cell Performance ◽  
Blend Membranes

We present novel acid–base blend membranes with improved chemical stability and competitive fuel cell performance compared to conventional PBI membranes.

Impact of N-Substituent and pKa of Azole Rings on Fuel Cell Performance and Phosphoric Acid Loss

2021 ◽  
Author(s):  
Joseph Jang ◽  
Do-Hyung Kim ◽  
Byeol Kang ◽  
Joo-Hyoung Lee ◽  
Chanho Pak ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Phosphoric Acid ◽  
Cell Performance ◽  
Fuel Cell Performance

High Temperature Direct Methanol Fuel Cell Based on Phosphoric Acid PBI Membrane

2011 ◽  
Vol 8 (6) ◽  
Author(s):  
M. Mamlouk ◽  
K. Scott ◽  
N. Hidayati
Keyword(s):  
Fuel Cell ◽  
Phosphoric Acid ◽  
Catalyst Layer ◽  
Poor Performance ◽  
Open Circuit ◽  
Cell Performance ◽  
Feed Concentration ◽  
Fuel Cell Performance ◽  
Black Performance ◽  
Direct Methanol

A study of a vapor feed DMFC using PBI loaded with phosphoric acid is reported. The anode catalyst was a Pt-Ru alloy and the cathode Pt, both supported on carbon black. Performance of the fuel cell with low methanol concentrations is reported and in situ measurements of anode and cathode potentials were used to diagnose the fuel cell performance. The influence of temperature, methanol feed concentration, and oxygen pressure are reported. The fuel cell performance was quite low with peak power densities of 12 to 16 mW cm−2 obtained at a temperature of 175 °C, although open circuit potentials of up to 800 mV were achieved. The poor performance was attributed to significant anode polarization due to the presence of phosphate in the catalyst layer and to the influence of methanol crossover on the cathode performance. The performance of the DMFC was found to fall steadily with time over seven days of operation which was associated with an increased cell resistance as measured by ac impedance.

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