1. Biological Hydrogen Production
Heep Yunn School
Biological Hydrogen Production

2. Introduction Problems : Cause: Energy shortage + Global warming
Theory
Problems :
Energy shortage + Global warming
Cause:
Burning fossil fuels
Experiment
Calculation
Conclusion

3. Introduction Fossil fuels Alternative: Hydrogen Clean!!! Efficient!!!
Theory
Fossil fuels
Alternative: Hydrogen
Experiment
HYDROGEN
Clean!!!
Calculation
Efficient!!!
Conclusion

4. + Introduction General idea: Food Bacteria Hydrogen
Theory
General idea:
Hydrogen +
Food
Bacteria
Experiment
Calculation
Overflowing Landfill
Conclusion

5. Anaerobic methane+ hydrogen
Introduction
Theory
Theory
Aerobic  carbon dioxide + water
Experiment
Anaerobic methane+ hydrogen
Calculation
Conclusion

6. Theory Bacteria in soil Introduction Theory Experiment Calculation
Conclusion

7. Introduction
Theory
Theory
100°C
Experiment
Calculation
Conclusion

8. Hydrogen+ methane Theory Introduction Theory Experiment Calculation
Conclusion

9. Experimental Procedures
Introduction
Experimental Procedures
Gas produced is collected in a measuring cylinder by water displacement.
Theory
Food
Treated soil
Experiment
Calculation
Conclusion

10. Problems we faced How can we determine the molar mass of the gas?
Introduction
Problems we faced
Theory
How can we determine the molar mass of the gas?
How can we find out the hydrogen composition in the biogas?
Experiment
Calculation
Conclusion

11. Test for the gas Pop! The gas gives a pop sound with a burning splint.
Introduction
Test for the gas
Theory
The gas gives a pop sound with a burning splint.
Experiment
Calculation
Pop!
Conclusion

12. Transference of gas to a balloon
Introduction
Transference of gas to a balloon
Acidic gases absorbed by concentrated Sodium Hydroxide
Theory
Moisture absorbed by solid calcium oxide in the U-tube
Filtered gas collected in the balloon
Water in
Experiment
Calculation
By water displacement, the gas collected is pumped out of the bottle.
Alkaline gases absorbed by concentrated sulphuric acid
Conclusion

13. Introduction
Calculation
Theory
Experiment
Calculation
Conclusion

14. Calculation By Newton’s first Law: By change of subject: Introduction
Theory
By Newton’s first Law:
Experiment
Reading of
the balance
Weight of the gas
Weight of
the balloon
Up thrust
Calculation
By change of subject:
Conclusion

15. Calculation W=mg Mass of the gas Introduction Theory Experiment
Conclusion

16. Calculation nM = m Mass No. of of moles gas of gas Molar mass
Introduction
Calculation
Mass of
gas
Theory
No. of
moles
of gas
nM = m
Molar
mass
Experiment
Calculation
Conclusion

17. C Calculation Linear relationship Merging the two equations, we get:
Introduction
Calculation
Theory
Merging the two equations,
we get:
Experiment C
Calculation
Linear relationship
Conclusion

18. Results Experiment 1: Test for food Introduction Theory Experiment
Volume of gas
produced (mL)
Types of food
Experiment
Calculation
Conclusion

19. Results Experiment 2: Test for optimal pH Introduction Theory
Calculation
Conclusion

20. Volume of biogas produced (mL)
Introduction
Results
Experiment 3: Test for optimal temperature
Theory
Volume of biogas produced (mL)
Experiment
Calculation
Conclusion

21. Conclusion The findings of our investigation are…
Introduction
Conclusion
Theory
The findings of our investigation are…
Fastest rate of food decomposition occurs at 40 degree Celcius in acidic condition (pH4). Among different types of food, pork works the best.
The gas produced in the reaction generally has the molar mass of 13, which indicates that 22-59% of the gas produced is hydrogen.
The conditions only affect the rate of reaction, not the proportion of hydrogen produced.
Experiment
Calculation
Conclusion

22. Integrated Science Conclusion Introduction Theory Experiment
Calculation
Conclusion