Catalysts and Altering Octane Numbers

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  • Created by: EveKidney
  • Created on: 02-01-15 17:20
What is a catalyst?
A catalyst speeds up a chemical reaction without being used up or changed
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The catalyst reduces the what?
Activation Energy (by offering a different pathway or mechanism)
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What i a Heterogeneous catalyst?
Heterogeneous Catalysts are in a different physical state to the reactants
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What does cracking produce?
Short chain Alkanes and Alkenes
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What happens in reforming?
Alkanes are converted to Cycloalkanes and Hydrogen, Cycloalkanes are then converted to Arenes and Hydrogen
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What catalyst is used in reforming?
Platinum Catalyst
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What are the Products like in Isomerisation?
The product is shorter and more branched than the reactant
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In Isomerisation the longest carbon chain becomes shorter, so what happens to the Octane Number?
It increases
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There is more branching, so what happens to the Octane Number?
It increases
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What 2 things helps isomerisation take place?
Platinum Catalyst and Zeolite Sieve
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What happens When a catalyst is poisoned?
A catalyst Poison ADSORBS onto the catalyst surface and stops it working
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Does the Catalyst poison ADSORB stronger or weaker than the reactants?
The poison ADSORBS more STRONGLY than the reactants
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Other cards in this set

Card 2

Front

The catalyst reduces the what?

Back

Activation Energy (by offering a different pathway or mechanism)

Card 3

Front

What i a Heterogeneous catalyst?

Back

Preview of the front of card 3

Card 4

Front

What does cracking produce?

Back

Preview of the front of card 4

Card 5

Front

What happens in reforming?

Back

Preview of the front of card 5
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