Prepregs Honeycomb

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Plantwide control structure design for an
acid-catalyzed process to produce biodiesel from
used palm oil
Adviser Dr. Soorathep Kheawhom
Presented by Teerapan Rujirachun
Department of Chemical Engineering Faculty of
Engineering, Chulalongkorn University Bangkok
10330, Thailand
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Outline
? Introduction ? Theory ? Biodiesel plant ?
Steady State Simulation ? Dynamic State
Simulation ? Results and discussion ? Conclusions
? Introduction
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(No Transcript)
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Outline
? Introduction ? Theory ? Biodiesel plant ?
Steady State Simulation ? Dynamic State
Simulation ? Results and discussion ?
Conclusions
? Theory
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Transesterification
Biodiesel
Catalyst
Vegetable oil or Animal fat
Alcohol
Glycerol
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Effect of Alkali-Catalyst
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Outline
? Introduction ? Theory ? Biodiesel plant ?
Steady State Simulation ? Dynamic State
Simulation ? Results and discussion ?
Conclusions
? Biodiesel plant
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Biodiesel Production
Prepare waste cooking oil and other chemical
Transesterification
Separate Biodiesel from Glycerol
Catalyst Removal
Biodiesel Purification
Glycerine Purification
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Outline
? Introduction ? Theory ? Biodiesel plant ?
Steady State Simulation ? Dynamic State
Simulation ? Results and discussion ?
Conclusions
? Steady State Simulation
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Biodiesel Production
Mixing
Transesterification
Biodiesel Purification
Water Washing
Acid Removal
Recycle Methanol
Heat Exchanger
Methanol Recovery
Glycerol Purification
CaO H2SO4 ? CaSO4 H2O
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Outline
? Introduction ? Theory ? Biodiesel plant ?
Steady State Simulation ? Dynamic State
Simulation ? Results and discussion ?
Conclusions
? Dynamic State Simulation
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Plantwide Control Procedure
Luyben Tyreus 1998
Establish control objectives
Determine control degrees of freedom
Establish energy management system
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Plantwide Control Procedure
Establish energy management system
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Plantwide Control Procedure
Set production rate
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Plantwide Control Procedure
Set production rate
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Plantwide Control Procedure
Set production rate
Control product quality and handle safety,
operational, and environmental constraints
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Plantwide Control Procedure
Control product quality
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Plantwide Control Procedure
Set production rate
Control product quality and handle safety,
operational, and environmental constraints
Fix a flow in every recycle loop and control
inventories
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Plantwide Control Procedure
Fix a flow in every recycle loop and control
inventories
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Plantwide Control Procedure
Check component balances
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Plantwide Control Procedure
Check component balances
Used palm oil
Methanol
Sulfuric acid
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Plantwide Control Procedure
Check component balances
Control individual unit operation
Optimize economic and improve dynamic
controllability
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Outline
? Introduction ? Theory ? Biodiesel plant ?
Steady State Simulation ? Dynamic State
Simulation ? Results and discussion ?
Conclusions
? Results and discussion
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Disturbance test
The control structure of Biodiesel production
process
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Disturbance test

Increase heat load disturbance of hot stream


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Disturbance test

Change in feedstock before inlet reactor



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Outline
? Introduction ? Theory ? Biodiesel plant ?
Steady State Simulation ? Dynamic State
Simulation ? Results and discussion ?
Conclusions
? Conclusions
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Conclusions

• The control structure of this process can control
  purity of Biodiesel product greater than
  99.65wt. and glycerine by-product greater than
  92wt. (ASTM specifications)
• The control structure can control to achieve the
  control objective then change in load disturbance
  and change in feedstock before inlet reactor for
  transesterification.

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