Evaluation of Ascorbic Acid and Acetic Acid As Catalysts in the Transesterfication of Virgin Soybean Oil

Fuels and Petrochemicals Division
AIChE Annual Meeting
November 8, 2013 - 12:45pm-1:00pm

Biologically derived acids such as ascorbic acid and acetic acid may be used to catalyze the production of biodiesel in a supercritical fluid solvent.  The use of binary mixtures of supercritical carbon dioxide and methanol with the aid of an acid catalyst can facilitate the transesterfication reaction.  This may hold a potential advantage over non-catalytic supercritical methanol production of biodiesel due to methanol’s higher critical temperature than that of the critical temperature of binary mixtures of carbon dioxide and methanol.  The production of biodiesel using a ascorbic acid and acetic acid as a catalyst was evaluated in an agitated 500 mL Hastelloy C276 batch reactor.  Comparison experiments between sub-critical methanol , supercritical methanol , and supercritical methanol with a carbon dioxide cosolvent were performed between 175 °C and 250 °C.  Hold time was varied between 20 and 40 minutes and the methanol and soybean concentrations were varied.  The effect of temperature and concentration upon conversion will be discussed as well as a comparison between catalysts and use of binary mixtures of supercritical carbon dioxide.

Professional Development Hours
0.5 PDHs
You will be able to download and print a certificate for these PDH credits once the content has been viewed. If you have already viewed this content, please click here to login.

Would you like to access this content?

No problem. You just have to complete the following steps.

You have completed 0 of 2 steps.

  1. Log in

    You must be logged in to view this content. Log in now.

  2. Purchase Technical Presentation

    You must purchase this technical presentation using one of the options below.
    If you already purchased this content recently, please click here to refresh the system's record of ownerships.


Credits 0.5 Use credits
List Price $25.00 Buy now
AIChE Members $15.00 Buy now
AIChE Fuels and Petrochemicals Division Members Free Free access
AIChE Undergraduate Student Members Free Free access
AIChE Graduate Student Members Free Free access
Skill Level: