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					                                            Calvin College




From Left: Joshua Harbert, Christian Ocier, Mitch Kenyon, Fred Thielke, Adebo Alao
Outline

•What – Project Overview
•Why – Underlying Reasoning
•How – Technical Requirements
•Who – Other Potential Users
•Acknowledgements
•Questions
   Our Project
Design and construct a process to convert Yellow Grease into
biodiesel
   •Capable of processing high Free Fatty Acid (FFA) feedstock
   •45 gal capacity
   •2-stage process
  Our Project
Yellow Grease is obtained from Campus Dining Services

Tentative plans for reactor
   •Donate to Calvin College
       •Campus Student Organization will operate reactor to
       fuel a campus commuter van
    Why Are We Doing This?
•   We believe that:
    •There is an energy crisis arising
    •There is no single solution

•   We also believe that the solutions will be dependent on:
    •Life style changes
    •Cultural and regional resource use
    •Sustainable/renewable energy

•   Education and good examples
    will be very important
    in solving this problem
Where Does Biodiesel Come From?


Soy oil has limited
potential
   •Soy oil costs
   $2.16/gal
   •Processed yellow
   grease costs
   between $0.91-
   $1.13/gal
   Alternatives For Our Process?

Trap grease is an
alternative to yellow grease
    •Contain high FFA
    •Difficult to collect
    •Difficult to process
    • Virtually Free
A process like ours is ideal
for high FFA feedstocks
Inputs and Outputs
How We Are Doing This?

Basic Components
   • Reaction vessel
   • Filter
   • Polisher
   • Pump
   • Agitator
   • Vacuum Pump
   • Methanol Condenser
How We Are Doing This?
     Glycerin
     Waste glycerin can be reprocessed and:
     •Produces Ethylene Glycol and Propylene Glycol
     •Yields a profit of $1.34 per gallon of glycerin




Based on a study by University of Waterloo Engineering Department
  Adsorption

                    Polishing Column




Polymer Adsorbent
 Vacuum Distillation
Vacuum Distillation:
   •Pulls a vacuum on the reactor to recover
   the methanol and remove the water

Advantages:
   •Water in oil boils at ~140°C
   •With a vacuum it is only 60°C
   •Prevents fume leakage of Methanol and
   Potassium Methoxide, which are
   flammable and poisonous
   •Uses significantly less energy
  Energy and Cost

Some data based on calculations
and lab work

   •$0.78/gal (free WVO)

   •$1.88/gal (WVO @ $1.13/gal)

   •Input energy=1.17MJ/kg

   •Energy
   delivered=12.72MJ/kg
Who Should and Shouldn’t do This
  Suitable for:
      •Trucks, boats, generators, personal vehicles
      •Most unmodified diesel engines
      •Most moderate climates

  Not Suitable for:
     •Very cold environments
     •Older diesel engines (natural rubber parts)
Thanks and Acknowledgements

•Energy Office of Michigan
•Calvin College
•The University of Waterloo
•Mary Jo Pulte
Questions?

				
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