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Biodiesel – using waste agricultural products to power school buses Part 1 - Synthesis. Presented to CONASTA 59 2010 by the Primary Industry Centre for Science Education (PICSE) Dr Robert Elliott (Dr) David Schaller – Macquarie Oils Ms Anna Paice - UTAS. What is PICSE?.

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biodiesel using waste agricultural products to power school buses part 1 synthesis

Biodiesel – using waste agricultural products to power school busesPart 1 - Synthesis

Presented to CONASTA 59 2010 by the

Primary Industry Centre for Science Education (PICSE)

Dr Robert Elliott

(Dr) David Schaller – Macquarie Oils

Ms Anna Paice - UTAS

what is picse
What is PICSE?
  • Primary Industry Centre for Science Education based at UTAS
  • National program
  • 8 Activity Centres
  • Attracting talented students to study science, suffering from major skills shortages
  • Teacher PDs, class visits, Industry Placement Scholarship for yr 11/12, Science Camps yr 10, classroom resources, Science Investigation Awards yr 5-12
slide4

Learning Outcomes

  • Make climate debate concrete
  • Understand carbon neutral fuel
  • Understand why BD (not straight veg oil)
  • Chemistry: fats, soap and biodiesel
  • Poor BD synthesis - leads to investigation, experimentation, development
slide5

Connections to curriculum

  • Renewable fuels
  • Titration – acid/base
  • Saponification reaction
  • Organic compounds – naming
  • Esterification reaction
  • Factors effecting reaction rates, completion/equilibrium
  • Experimental design and process
slide7

Driving around the world on

straight vegetable oil (SVO)

(Biodiesel education project: Oil+Water -> http://www.naturalheroes.tv/vod.html )

http://susty.com/image/drive10.jpg

http://nrpw.com/rig.html

slide8

Ignition by compression:

no spark plug in diesels

http://www.youtube.com/watch?v=LcQcfoanCU0&feature=related

slide9

High viscosity of

straight vegetable oil (SVO)

http://bobbybilt-rhino.tripod.com/

http://sciencesquad.questacon.edu.au/activities/falling_marbles.html

slide10

Biodiesel vs vegetable oil (SVO)

Viscosity --> fine spray

Demo

slide11

http://biodiesel.infopop.cc/eve/forums/a/tpc/f/159605551/m/725107971http://biodiesel.infopop.cc/eve/forums/a/tpc/f/159605551/m/725107971

slide12

Engine damage from using

straight vegetable oil (SVO)

http://forums.tdiclub.com/showthread.php?t=206587&page=2

http://www.biofuelsforum.com/svo_users/4379-direct_injection_landcruiser_factory_turbo_diesel_engine_insp_after_running_wvo.html

slide13

Biodiesel vs vegetable oil (SVO)

Flammability (flash point)

Whoosh!

slide14

Converting fats to biodiesel

glycerol

TG

(Fat)

DG

MG

+

+

+

slide15

Safety

Biodiesel is non-toxic,

but... making biodiesel...

  • Flammable – alcohol
  • Toxic- methanol
  • Corrosive – caustic soda
  • Heat/sparks...

Image from http://www.odec.ca/projects/2006/bach6k2/discuss.htm

slide16

Ethanol-based biodiesel demos?

  • The original Dr Pepper methanol protocol
  • Existing small scale ethanol-based lesson
  • Our adaptation of the Dr. Pepper protocol to ethanol

http://www.biodieselcommunity.org/

http://attra.ncat.org/attra-pub/biodiesel.html#making

Or Small scale ethanol ref

slide17

+ H2

+ H2O

+ alcohol

Margarine

+ H2

Soap (FFAs)

Biodiesel (FAMEs)

Alkanes

slide18

Dry alcohol, dry NaOH,

dry/fresh oil: <1% FFAs,

dry glassware, dry air

Soap + H2O + oil + shaking = ???

Have you ever tried to burn soap?

Bonus: why doesn\'t soap burn?

slide19

Making the catalyst with drain cleaner

+

http://www.northcoastchemicals.com.au/catalog/images/0210-2-shU1.JPG

slide21

Burning glycerol makes a gummy mess you don\'t want in your engine!

http://www.impactlab.com/2008/08/14/marshmallow-cancer/

http://jumboempanadas.blogspot.com/2006/10/how-hard-could-it-be-to-make-fluffy.html

slide22

\'Pre-wash\' helps glycerol separate

+ 1 Tbs H2O

100 ml + 20ml = approximately 150 ml

slide24

Modifications to the Dr Pepper demo protocol

  • Use less toxic ethanol
  • Dry ethanol using polenta (or rock salt)(Optional?)
  • Longer reaction times (heat?)
  • Trigger glycerol separation with H2O prewash
  • Prevent emulsions with salt washes

http://attra.ncat.org/attra-pub/biodiesel.html#making

Or Small scale ethanol ref

http://www.biodieselcommunity.org/

bob elliott s biodiesel protocol
Bob Elliott’s Biodiesel Protocol

Add 30g NaOH to 200mL dry ethanol >95% in a conical flask, mix well. Use a hotplate to dissolve catalyst in the alcohol if required.

Use an empty, completely dry 1.25L soft drink bottle or 1L separating funnel. Add 300mL of new vegetable oil (canola, soy bean, olive, poppy, almond etc) then add the dissolved catalyst+alcohol mix.

Gently shake by inverting bottle or funnel several times and leave to settle overnight, or compare different reaction times eg 5 mins, 10 mins, 20 mins, 30 mins.

Wash the biodiesel

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