Fuels Flashcards
(18 cards)
State the products of incomplete combustion
CO and H2O or C
What is catalytic cracking used for?
Mainly petrol
State one environmental problem that can be caused by the release of sulfur
Acid rain
Give the general formula for the homologous series of alkanes
CnH2n+2
Why does incomplete combustion occur
An insufficient supply of oxygen
What conditions are required for thermal cracking
Very high temperature and very high pressure
State the products of the complete combustion of methane
CO2 and H2O
Identify one substance that could be used to removed sulfur gas
calcium oxide/lime
Name the process used to separate octane from a mixture containing several different alkanes
Fractional distillation
What metal can be used in a catalytic converter?
Platinum, rhodium and palladium
What is the cart list in catalytic cracking
Zeolite
Suggest one reason why the catalyst is coated on ceramic honeycomb
Bigger surface area so increased rate of reaction
Why is cracking useful?
To produce products in higher demand
State the meaning of
- Saturated
- Hydrocarbon
- c-c bonds only/no double bonds
2. Only hydrogen and carbon
Suggest a type of compound that could be manufactured from C4H8?
plastic
explain why the boiling point of a branched alkane is lower than a straight chain alkane
- smaller surface area
* van der Waals between molecules weaker
State the type of cracking that produces high proportion of ethene and propene. Give two conditions for this cracking?
- thermal
* high pressure and temperature
suggest why a leak of NO2 gas will cause atmospheric pollution
contributes to acid rain
