What occurs in a lime kiln?

Answer 1

A lime kiln is a kiln used to produce quicklime by the calcination of limestone (calcium carbonate). The chemical equation for this reaction is:

CaCO3 + heat → CaO + CO2

This reaction takes place at 900°C (at which temperature the partial pressure of CO2 is 1 atmosphere), but a temperature around 1000°C (at which temperature the partial pressure of CO2 is 3.8 atmospheres) is usually used to make the reaction proceed quickly. Excessive temperature is avoided because it produces unreactive, "dead-burned" lime.

Answer 2

Limestone is deposited into a kiln which produces extreme heat using coal as the fuel. The limestone is thermally decomposed into lime and carbon dioxide. The lime collects at the bottom of the kiln in a solid lump while the carbon dioxide rises and is released through a small tube called the CO2 outlet. The reverse of this process can also be done in a lime kiln.

Answer 3

Thermal Decomposition