Pd Nanoparticle Size Effect of Anodic Catalysts on Direct Formic Acid Fuel Cell Initial Performance: Development of a Mathematical Model and Comparison with Experimental Results

2021 ◽  
Author(s):  
Yuh-Jing Chiou ◽  
Karol Juchniewicz ◽  
Krzysztof R. Kupiec ◽  
Anna Mikolajczuk-Zychora ◽  
Bogusław Mierzwa ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Fuel Cell ◽  
Size Effect ◽  
Formic Acid ◽  
Experimental Results ◽  
Nanoparticle Size ◽  
Pd Nanoparticle ◽  
Performance Development

Optimization of the Working Conditions of a Single Molten Carbonate Fuel Cell

2012 ◽  
Vol 267 ◽  
pp. 64-71
Author(s):  
Jarosław Milewski ◽  
Andrzej Miller
Keyword(s):  
Mathematical Model ◽  
Fuel Cell ◽  
Working Conditions ◽  
Simulated Data ◽  
Experimental Results ◽  
Molten Carbonate Fuel Cell ◽  
Molten Carbonate ◽  
Carbonate Fuel Cell

A mathematical model of a Molten Carbonate Fuel Cell (MCFC) is shown. The model is used to simulate an experimental lab-stand single fuel cell unit measuring 55 cm2. The comparison of simulated data against the experimental results is shown and commented on.

Experimental Investigation on the Performance of a Formic Acid Electrolyte-Direct Methanol Fuel Cell

2013 ◽  
Vol 11 (2) ◽  
Author(s):  
David Ouellette ◽  
Cynthia Ann Cruickshank ◽  
Edgar Matida
Keyword(s):  
Fuel Cell ◽  
Formic Acid ◽  
Power Output ◽  
Direct Methanol Fuel Cell ◽  
Operating Conditions ◽  
Portable Devices ◽  
Acid Electrolyte ◽  
Optimal Operating ◽  
Direct Methanol ◽  
Methanol Fuel Cell

The performance of a new methanol fuel cell that utilizes a liquid formic acid electrolyte, named the formic acid electrolyte-direct methanol fuel cell (FAE-DMFC) is experimentally investigated. This fuel cell type has the capability of recycling/washing away methanol, without the need of methanol-electrolyte separation. Three fuel cell configurations were examined: a flowing electrolyte and two circulating electrolyte configurations. From these three configurations, the flowing electrolyte and the circulating electrolyte, with the electrolyte outlet routed to the anode inlet, provided the most stable power output, where minimal decay in performance and less than 3% and 5.6% variation in power output were observed in the respective configurations. The flowing electrolyte configuration also yielded the greatest power output by as much as 34%. Furthermore, for the flowing electrolyte configuration, several key operating conditions were experimentally tested to determine the optimal operating points. It was found that an inlet concentration of 2.2 M methanol and 6.5 M formic acid, as along with a cell temperature of 52.8 °C provided the best performance. Since this fuel cell has a low optimal operating temperature, this fuel cell has potential applications for handheld portable devices.

Interrelationship between TiO2 nanoparticle size and kind/size of dyes in the mechanism and conversion efficiency of dye sensitized solar cells

2017 ◽  
Vol 19 (18) ◽  
pp. 11187-11196 ◽  
Author(s):  
Pooya Tahay ◽  
Meisam Babapour Gol Afshani ◽  
Ali Alavi ◽  
Zahra Parsa ◽  
Nasser Safari
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Tio2 Nanoparticle ◽  
Experimental Results ◽  
Nanoparticle Size ◽  
Intrinsic Properties ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Photocurrent efficiency measurements and other experimental results demonstrate that the best TiO2 nanoparticle size depends on the intrinsic properties of the dye and the best size changes with dye type.

Improvement for the Mass Transfer in the Anode Electrode of Direct Formic Acid Fuel Cell Fabricated by Ultrasonic Spray

2015 ◽  
Vol 69 (17) ◽  
pp. 683-689
Author(s):  
F. Matsuoka ◽  
T. Tsujiguchi ◽  
Y. Osaka ◽  
A. Kodama
Keyword(s):  
Mass Transfer ◽  
Fuel Cell ◽  
Formic Acid ◽  
Ultrasonic Spray ◽  
Anode Electrode

Study of the Size Effects and Friction Conditions in Microextrusion—Part II: Size Effect in Dynamic Friction for Brass-Steel Pairs

2007 ◽  
Vol 129 (4) ◽  
pp. 677-689 ◽  
Author(s):  
Lapo F. Mori ◽  
Neil Krishnan ◽  
Jian Cao ◽  
Horacio D. Espinosa
Keyword(s):  
Grain Size ◽  
Friction Coefficient ◽  
Size Effect ◽  
Contact Pressure ◽  
Size Effects ◽  
Numerical Models ◽  
Kolsky Bar ◽  
Experimental Results ◽  
Material Response ◽  
Dynamic Coefficients

In this paper, the results of experiments conducted to investigate the friction coefficient existing at a brass-steel interface are presented. The research discussed here is the second of a two-part study on the size effects in friction conditions that exist during microextrusion. In the regime of dimensions of the order of a few hundred microns, these size effects tend to play a significant role in affecting the characteristics of microforming processes. Experimental results presented in the previous companion paper have already shown that the friction conditions obtained from comparisons of experimental results and numerical models show a size effect related to the overall dimensions of the extruded part, assuming material response is homogeneous. Another interesting observation was made when extrusion experiments were performed to produce submillimeter sized pins. It was noted that pins fabricated from large grain-size material (211μm) showed a tendency to curve, whereas those fabricated from billets having a small grain size (32μm), did not show this tendency. In order to further investigate these phenomena, it was necessary to segregate the individual influences of material response and interfacial behavior on the microextrusion process, and therefore, a series of frictional experiments was conducted using a stored-energy Kolsky bar. The advantage of the Kolsky bar method is that it provides a direct measurement of the existing interfacial conditions and does not depend on material deformation behavior like other methods to measure friction. The method also provides both static and dynamic coefficients of friction, and these values could prove relevant for microextrusion tests performed at high strain rates. Tests were conducted using brass samples of a small grain size (32μm) and a large grain size (211μm) at low contact pressure (22MPa) and high contact pressure (250MPa) to see whether there was any change in the friction conditions due to these parameters. Another parameter that was varied was the area of contact. Static and dynamic coefficients of friction are reported for all the cases. The main conclusion of these experiments was that the friction coefficient did not show any significant dependence on the material grain size, interface pressure, or area of contact.

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