Modelling of Biodiesel Production Marianne

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Modelling of Biodiesel ProductionMarianne Øien
Supervisors Sigurd Skogestad and Chriss Grimholt
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Agenda

• Project description
• Work done
• Model validation
• Further work

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Project description

• Created a model for biodiesel production by plug
  flow reactor
• Validation of model
• Learn Simulink
• Renewable energy sources

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Flow scheme
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Simulink model

• Ten CSTRs in series for plug flow reactor
• Settling tank for buffer effect and separation
• Distillation between biodiesel and methanol
• Flash of methanol from glycerol

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Operating condition

• Soyabean oil, assumed one component for
  simplicity
• 600C
• 100 excess methanol
• NaOH catalyst

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Model validation

• Single units and system
• Change in flowrate
• Disturbance in feed composition and methanol
  excess
• New product requirements in purity

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Reaction Chemistry

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Reactor validation

• Removal of methanol in feed
• No conversion
• Change through reactors

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Settling tank response

• Increased biodiesel fraction upstream
• Smooth out disturbance downstream
• Total flow conserved

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System disturbance

• Application of 10 flow disturbance
• Smooth output disturbance
• Excess methanol reflected in vapour and liquid
  flow

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Further work

• Include industrial size, amounts and data
• Optimal flows for nominal operation
• Tuning and control
• Industrial expected disturbances
• Reducing computation time
• More complex validation cases

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• Questions?
• Thank you for your attention!