Carbon Dioxide ( industry)

Question 1

Which chemical property of CO2 allows it to dissolve in water?

Answer 1

It is a polar molecule.

Question 2

Name all the uses of carbon dioxide in all its forms

Answer 2

1. production of urea
2. pressurizing oil wells for secondary oil recovery
3. refrigeration
4. as a source of inert atmosphere
5. beverage carbonation
6. production of salicylic acid
7. fire extinguishing material
8. production of soda ash (sodium carbonate)

Question 3

How is carbon dioxide commonly manufactured?

Answer 3

1. With flue gases as a by-product of burning material with carbon
2. As a by- product from the fermentation industry
3. By-product of the lime kiln operation

Question 4

What is a flue gas?

Answer 4

A mixture of gases produced by the burning of fuel (the combustion reaction of hydrocarbons in the air)

Question 5

What is urea and what is it used for?

Answer 5

Urea is the most commonly used nitrogen-based fertilizer.
Urea is also found in resins, diesel engines and in creams/lotions as well as laboratory tests

Question 6

What are the properties of Carbon dioxide?

Answer 6

1. Dryness : removes water from substances
2. Provides an excellent refrigeration effect
3. Acts as an insulator
4. Cheap to manufacture
5. Non corrosive
6. Low temperature
7. Light weight

Question 7

Describe the lime-kiln operation

Answer 7

Limestone is heated in a kiln to produce CaO and CO2 as by-products

Question 8

Describe how is dry ice manufactured from natural gas (methane)

Answer 8

1. Fuel is burned
2. Flue gasses are cooled and purified by passing them through water scrubbers
3. CO2 is removed by absorption into ethanol amine
4. CO2 and steam leave the top of the reactivator, passing through a CO2 cooler
5. CO2 is passed through a permanganate scrubber which removes traces of H2S and amines
6. Liquid CO2 is compressed, cooled and liquified
7. Solid CO2 is now shaped