Module 1 end product of Materials
Ethylene, polymers and ethanol
* fogy fuels energy rich substances formed in the Earths crust under intense foment and pressure millions of years ago. Originally remains of marine organisms, they were born-again into petroleum that is trapped near the Earths surface. Fossil fuels can be extracted and refined to provide energy, and the building blocks of gross oil can be used to create many materials for human use e.g. ethylene.
* Petroleum mixture of hydrocarbons, consists of liquid unskilled oil and gaseous natural petroleum gas. It can be separated using physical and chemical changes. Liquid unrefined oil can be separated in fractions via halfway distillation where each fraction contains molecules of similar molecular weight.
* wisecrack the chemical process of breaking large hydrocarbon molecules into smaller ones, an energy-absorbing process. There be two types: catalytic cracking and caloric cracking.
1. Catalytic cracking process in which high molecular weight (high boiling point) fractions from crude oil are scattered into lower molecular weight substances in order to profit the output of high demand products.
This process occurs in a column called a cat cracker. The hydrocarbons can be part down into smaller alkenes until ethylene or propene.
e.g.
C15H32 ?C10H22+ C5H10 C5H10 ? C2H4+ C3H6
The overall products are shorter chained alkanes (for petrol) and small alkenes. The catalysts used are inorganic compounds called zeolites which are crystalline aluminosilicates (porous compounds of aluminium silicon and oxygen), allowing for cracking at a lower temperature around 500°C, in the absence of sort and above atmospheric pressure.
2. Thermal cracking also cognize as steam cracking, a non catalytic process where a mixture of alkanes with steam is passed through hot metal tubes...If you trust to get a full essay, order it on our website: Orderessay
If you want to get a full essay, wisit our page: write my essay .
No comments:
Post a Comment