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BET Surface Area
• ∝ Cracking
• ∝ Gases Production
• ∝ 1/Liquid Yield
• Increased by
• Thermal Modification and milling
• Example: ZSM-5
Pore Size
• Types: Microporous and
Macro porous
• Microporous produces more
gases, Microporous favors
liquids
• Primary cracking occurs at
the surface, then molecules
enter pores of catalyst where
further cracking occurred
Crystalline Structure
• ∝ catalytic activity
• Example: Zeolite
Acidity
• Acid base catalyst cracking in
pyrolysis > basic catalyst
• ∝ Gases Production
• ∝ 1/Liquid Yield
• Acidic catalyst removes
impurities from produce
liquid funnel
Thermal Stability
• Catalyst having high thermal
stability show excellent
catalytic activity at high
temperature
Reforming Catalyst
• Metal are doped on the
acidic base of catalyst which
preform dual function and
enhance the catalytic activity
of catalyst
Dimensions
Pore Volume
Si/Al ratio
Lewis and Bronsted Acid Site
Characterization of Catalysts
Characterization of Catalysts
Characterization of Catalysts

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Characterization of Catalysts

  • 1. BET Surface Area • ∝ Cracking • ∝ Gases Production • ∝ 1/Liquid Yield • Increased by • Thermal Modification and milling • Example: ZSM-5 Pore Size • Types: Microporous and Macro porous • Microporous produces more gases, Microporous favors liquids • Primary cracking occurs at the surface, then molecules enter pores of catalyst where further cracking occurred Crystalline Structure • ∝ catalytic activity • Example: Zeolite Acidity • Acid base catalyst cracking in pyrolysis > basic catalyst • ∝ Gases Production • ∝ 1/Liquid Yield • Acidic catalyst removes impurities from produce liquid funnel Thermal Stability • Catalyst having high thermal stability show excellent catalytic activity at high temperature Reforming Catalyst • Metal are doped on the acidic base of catalyst which preform dual function and enhance the catalytic activity of catalyst Dimensions Pore Volume Si/Al ratio Lewis and Bronsted Acid Site