Industrial cracking

Card Set Information

Author:
algebrageek
ID:
190556
Filename:
Industrial cracking
Updated:
2012-12-24 10:23:09
Tags:
Chemistry AQA
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Description:
10 questions on thermal and catalytic cracking
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  1. Why are hydrocarbons cracked?
    • Shorter, more VALUABLE chains are produced
    • Some of the products are ALKENES, more reactive than alkanes
  2. Thermal cracking - temperature
    700K-1200K
  3. Thermal cracking - pressure
    up to 7000kPa
  4. Thermal cracking - products
    High proportion of ALKENES
  5. Catalytic cracking - temperature
    around 720K
  6. Catalytic cracking - pressure
    lower pressure (more than atmospheric)
  7. Catalytic craking - catalyst
    Zeolite catalyst
  8. What is the catalyst used in catalytic cracking made out of?
    • Silicon dioxide
    • Aluminium oxide
  9. Is the catalyst used in catalytic cracking acidic or alkaline?
    Acidic
  10. Catalytic cracking - products
    • Motor fuels:
    • branched ALKANES
    • cycloalkanes
    • aromatic compounds

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