ChE 466/566 Lecture 1. Fuel Cell and Hydrogen Technology (ChE466/566: 466 for undergraduates and 566 for graduates) (3 Credits, Tu Th 2:35-3:50 pm, JH-203) Department of Chemical Engineering New Mexico State University. Instructors . Dr. Shuguang Deng Jett Hall 253 (Office)
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Fuel Cell and Hydrogen Technology
(ChE466/566: 466 for undergraduates and 566 for graduates)
(3 Credits, Tu Th 2:35-3:50 pm, JH-203)
Department of Chemical Engineering
New Mexico State University
Dr. Shuguang Deng
Jett Hall 253 (Office)
e-mail: [email protected]
This course presents an introduction to the fundamentals and applications of fuel cell and hydrogen technology. It includes thermodynamics, electrochemical kinetics, fuel cell electrode catalysts, fuel cell systems, fuel reforming and H2 production, hydrogen storage, hydrogen safety. The applications of fuel cells in power generation, portable power, and automotives will also be covered. Students will also have a chance to work on a term project, write a term paper and present the term project.
There will be two exams and one term paper and presentation. The guidelines for term paper and presentation will be provided.
A:85-100; B:75-84; C:65-74; D:60-64; F:<60
Login Name: che466
2 Final presentations
Battery vs. fuel cells
What is fuel cell?
Why do we need fuel cell?
How does it work?
Where do we use it?
A device that converts chemical energy stored in a battery directly to electrical energy. It is a closed system.
Volta’s Battery (1800)
Alessandro Volta 1745 - 1827
Paper moisturized with NaCl solution
Zinc – Copper Battery
H2O H2 + ½ O2
H2 + ½ O2 H2O
Electrolysis / Power consumption
Electrochemical battery / Power generation
A device that converts the chemical energy stored in a fuel directly to electrical energy. It is an open system.
- Replaces an existing product
electric vs. gas light
- New product must cost less
- Provides new capability
airplanes ––> flight
- Cost not so important
Fuel cells are needed because fuel cells possess:
1). the advantageous characteristics of high-energy conversion efficiency
2). environmental benign operation
3). alleviate and eliminate dependence on fossil-fuel reserves
4). flexible for a variety of different applications
5). compatible with renewable energy sources
6). carriers for energy security, economic growth, and sustainable development.
H2 + ½ O2 Energy + H2O + Waste Heat
6. Adsorbed species may migrate on the solid electrode surface, principally by the mechanism of diffusion.
7. Electrochemical reactions then occur on the electrode surface wetted by the electrolyte the so-called three phase boundary, giving rise to electrically charged species (or ions and electrons).
8. Electrically charged species and other neutral reaction products such as water, still adsorbed on the electrode surface, may migrate along the surface due to diffusion in what has been referred to as post-electrochemical surface migration.
9. The adsorbed reaction products become desorbed.
10. Some post-electrochemical homogeneous or heterogeneous chemical reactions may occur.
11. Electrochemical reaction products (neutral species, ions and electrons) are transported away from the electrode surface, mainly by diffusion but also for the ions, influenced by the electric field set up between the anode and cathode. The electron motion is dominated by the electric field effect.
12. Neutral reaction products diffuse through the electrolyte to reach the reactant gas/electrolyte interface.
13. Finally, the products will be transported out of the electrode and the cell in gas form.