Dry ice production from coal like?

In industrial kilns, people clean coal smoke, then use alkaline to clean CO ₂ . Then they heated to separate the gas from the lye, then compressed under pressure s

Coal (Photos: resourcescommittee)

So 70 atmospheres for it to turn into liquid . Then people let it evaporate under low pressure. As a result, they obtained solid CO ₂ , which is dry ice.

Liquid carbonic gas is stored in thick containers and transferred to a carbonated beverage factory and any factory that needs it. And dry ice, which is a solid CO ₂ , looks like snowballs, which are used in many areas such as food preservation or fire.

The temperature of dry ice is very low (-78 degrees Celsius), but if you hold it in your hand, people still don't feel too cold, the reason is that when we touch it, CO ₂ air comes out and separates our hand and ice. dried. Only when we grasp the dry ice, can we get frostbite. The noun dry ice expresses its physical properties primarily. The dry ice itself never gets wet and wet any object around. Hot is immediately turned into gas, not through liquid state. That characteristic of dry ice can be used to preserve extremely good food, because carbon dioxide on the surface also inhibits microbial growth. Finally, solid CO ₂ is a reliable fire extinguisher. Just throwing a piece of dry ice into the burning fire can extinguish it.