Biodiesel using waste agricultural products to power school buses part 1 synthesis
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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 l.jpg

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 l.jpg
What is PICSE? school buses

  • 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



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Learning Outcomes school buses

  • 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


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Connections to curriculum school buses

  • Renewable fuels

  • Titration – acid/base

  • Saponification reaction

  • Organic compounds – naming

  • Esterification reaction

  • Factors effecting reaction rates, completion/equilibrium

  • Experimental design and process


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Driving around the world on school buses

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


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Ignition by compression: school buses

no spark plug in diesels

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


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High viscosity of school buses

straight vegetable oil (SVO)

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

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


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Biodiesel vs vegetable oil (SVO) school buses

Viscosity --> fine spray

Demo


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


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Engine damage from usinghttp://biodiesel.infopop.cc/eve/forums/a/tpc/f/159605551/m/725107971

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


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Biodiesel vs vegetable oil (SVO)http://biodiesel.infopop.cc/eve/forums/a/tpc/f/159605551/m/725107971

Flammability (flash point)

Whoosh!


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

glycerol

TG

(Fat)

DG

MG

+

+

+


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

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


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Ethanol-based biodiesel demos?http://biodiesel.infopop.cc/eve/forums/a/tpc/f/159605551/m/725107971

  • 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


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+ Hhttp://biodiesel.infopop.cc/eve/forums/a/tpc/f/159605551/m/7251079712

+ H2O

+ alcohol

Margarine

+ H2

Soap (FFAs)

Biodiesel (FAMEs)

Alkanes


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Dry alcohol, dry NaOH,http://biodiesel.infopop.cc/eve/forums/a/tpc/f/159605551/m/725107971

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?


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Making the catalyst with drain cleaner http://biodiesel.infopop.cc/eve/forums/a/tpc/f/159605551/m/725107971

+

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


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Progress of the transesterification reactionhttp://biodiesel.infopop.cc/eve/forums/a/tpc/f/159605551/m/725107971


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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


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'Pre-wash' helps glycerol separate engine!

+ 1 Tbs H2O

100 ml + 20ml = approximately 150 ml


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Washing with salt water engine! † to remove contaminates: NaOH, ethanol, soap


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Modifications to the Dr Pepper demo protocol engine!

  • 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 l.jpg
Bob Elliott’s Biodiesel Protocol engine!

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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