Wednesday, December 13, 2017
Hydrogen Generation from Fuel Cells
Hydrogen Generation from Fuel Cells
What is the HYDROGEN FUEL CELL ?
It is a tool used to generate Hydrogen gas from electrolyzing water. The most common type is PEM Electrolyzer.
Proton exchange membrane water electrolysis (PEM)
The proton exchange membrane water electrolysis is based on the use of a polymeric proton exchange membrane as the solid electrolyte (polymer electrolyte membrane) and was first proposed by General Electric for fuel cell, and later, electrolyser applications.
Theory of water electrolyzing
The core of an electrolysis unit is an electrochemical cell, which is filled with pure water and has two electrodes connected with an external power supply. At a certain voltage, this is called critical volt the negatively biased electrode and oxygen gas at the positively biased electrode. The amount of gases produced per unit time is directly related to the current that passes through the electrochemical cell. In water, there is always a certain percentage found as ionic species; H+ and OH- represented by the equilibrium equation below:
H2O (l) ? H+(aq) + OH-(aq)
+ Electrode (anode): 4OH-? 2H2O + O2 + 4e-
- Electrode (cathode): 2H+(aq) + 2e-? H2(g)
A video explaining PEM Fuel Cell
This video below explains the PEM fuel cell experimentally ; showing the components and the theory of hydrogen fuel cell.
