4. Energy used in industry

Question 1

4.1 Energy use in manufacturing.
1. Iron and steel production

Answer 1

5% of world energy.
1a. Main energy sources are coal and coke.
1.b. Coke oven, sulphor removed with heating in the absence of oxygen.
1.c. Coke oven gasses.
1.d.Oxygen through pig-iron net energy producer.
1.e. Mini mills for scrap.

Question 2

4.1a Energy use in manufacturing, non-iron.
1. Petrochemicals
1. Ammonia production
4. Cement production.

Answer 2

1. Steam cracking of hydrocarvons.
2. Two steps, conversion to hydrogen, reaction with nitrogen.
3. Clinker production, blending into cement.

Question 3

4.2 Energy analysis of energy users.

Answer 3

Total energy use, equipment, building, additional measurements, energy balance, improvements.

Question 4

4.3 Energy management

Answer 4

Energy performance indicator.
Carbon management.
Three scopes.
Supply chain emissions.