Thermal decomposition in the industry

9 important questions on Thermal decomposition in the industry

What is one of the factors that is separated during the distillation of crde oil?

naphta fraction

What is the naphta fraction?

This fraction consists of average sized hydrocarbon molecules. By heating the naphtha fraction, the larger moleules are decomposed. Smaller molecules are formed s a result suchas ethylene and propylene molecules.

Of what does iron ore consist?

a compound consisting of the elements iron and oxygen.
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Why is carbon monoxide added as a reactant?

It will cost a lot of energy and needs very expensive installations  to directly decompose iron ore into the elements. So it is added, to 'catch'the oxygen atoms from the iron ore directly.

What is the state of matter of the iron formed?

liquid, because the temperature in the blast oven is higher than the melting point of iron.

What happens with the carbon that is left behind?

It is mixed with the iron. This mixture of iron and carbon is called cast iron or pig iron and it is drained off from the bottom of the blast furnace.

How is most of the carbon removed from cast iron?

by having it react with oxygen

C (s) + O2 (g) -> CO2 (g)

What is a block diagram?

A diagram to represent the different steps in such a process in a simple way, a chematic tye of drawing is used.

What can every block of the process present? 6

- storage of base materials
- preparatory treatment of base materials to facilitate the reaction later on
- the reaction in which the product is formed
- Separation of the reaction mixture into the product you want and the other substances. Sometimes these other substances can be reactants thata have not reacted yet. They can now be used again. Another possiblity is that by-products were forme during the reaction. Thse substances now have to be removed
- storage of the product
- Processing of unwanted by-products into harmless waste

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