harsh mangla
TRANSCRIPT
NAME = HARSH MANGLACLASS = X B
ROLL . NO = 11SUBJECT = SCIENCE
TOPIC = ELECTROLYSIS OF WATERRAWAL INTERNATIONAL
SCHOOL
“Energy can neither be created or destroyed, it can only be changed from one form to another”
– Albert Einstein
Conventional Alternate
How do we store electricity?
Through chemistry
battery
hydrogen
Why is Hydrogen such a big deal?
Energy Density (Mega Joules per kilogram)
Li-ion Battery 0.54Gasoline 46.9Hydrogen 120.0
~ 220 times more energy than batteries
~ 2.6 times more energy than gasolineNO AVAILABLE SOURCE OF HYDROGEN
Electrolysis of WaterElectrolysis: Using electricity to drive a non-spontaneous chemical reaction
H2 and O2
What do we need?• Water• Electrolyte (PEM, salt water, citric acid)• Metal electrodes (Anode +, Cathode -)• Electricity
Chemical what Happens
• Anode (positive):
• Cathode (negative):
OVERALL:
2H2O O2+4H++4e-
4H++4e-2H2
2H2O O2+2H2
What is a PEM
• PEM – Proton Exchange Membrane• Used as fuel cells to produce electricity
• Must use deionized water• Can be run backwards as an electrolyses
Proton Exchange Membrane
DEMO
4H++4e-2H22H2O O2+4H++4e-
How do we use the Hydrogen?
• Fuel Cells (electrolyzer in reverse)
• Run on H2 and O2 to form clean water.
• Water can then be recycled to electrolyzer.
Setup PEM electrolyzer(s). Produce efficiency curves of PEM using
simple circuitry. Determine Hydrogen Generation Rate vs.
Power input.Build our own electrolyzer powered by our Solar Cells
What are we going to do?
Electrolyte
Solar Cell
Design a Power Plant
Electricity!!!
WHAT INDUSTRY WANTS TO MAKE
Solar Cells
THANK YOU