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Biodiesel Production. Transesterification of natural oils yields lower molecular weight esters of appropriate viscosity for fuel applications. Triglyceride transesterification with methanol can be acid or base catalyzed.

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Biodiesel Production

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Biodiesel production

Biodiesel Production

  • Transesterification of natural oils yields lower molecular weight esters of appropriate viscosity for fuel applications.

    • Triglyceride transesterification with methanol can be acid or base catalyzed.

    • Free fatty acids within some feedstocks can only be esterified under acidic conditions.

      • Carboxylate salts create foaming problems, and adversely affect product viscosities


Biodiesel production1

Biodiesel Production

  • The Biox plant in Hamilton, Ontario has a nameplate capacity of 67 million litres per year for converting a wide range of feedstocks into clear, acid-free biodiesel.


Biodiesel production2

Biodiesel Production

  • Patented U of T process uses THF to yield a miscible, homogeneous catalytic process.

  • FFA’s in the feedstock are esterified under acidic conditions, then the whole mixture is transesterified under more efficient base catalysis.

  • Equilibrium is driven by excess methanol, and the phase-separation of glycerol from the reaction mixture


Acid catalyzed fatty acid esterification design exercise 1

Acid-catalyzed fatty acid esterification: Design Exercise 1

  • Derive rate equations from this mechanism that express the rate of reagent consumption and product(s) formation as a function of measurable process variables.

    • Include expressions for the instantaneous concentration of intermediates as a function of measurable process variables.


Acid catalyzed fatty acid esterification design exercise 11

Acid-catalyzed fatty acid esterification: Design Exercise 1

  • Derive rate equations from this mechanism that express the rate of reagent consumption and product(s) formation as a function of measurable process variables.

    • Include expressions for the instantaneous concentration of intermediates as a function of measurable process variables.


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