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Report 09242007: Long stability-soy based biodiesel (B100)

This report examines the long-term oxidation stability of untreated soy-based biodiesel (B100) and the effects of different antioxidants on its stability over 9 months of storage, both indoors and outdoors. The study reveals that while untreated biodiesel shows a decrease in stability over time, the addition of antioxidants can significantly enhance stability. Different antioxidants exhibit varying effects; specifically, TBHQ maintains its efficacy longer than PY and PG, which show significant stability loss, particularly at higher temperatures.

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Report 09242007: Long stability-soy based biodiesel (B100)

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  1. Report 09242007: Long stability-soy based biodiesel (B100) By Haiying Tang

  2. Chemical structures of antioxidants Ionol BF200: mixture of Mono-, Di-, and Tri- tert-butylphenol -(+)-Tocopherol

  3. Induction Period

  4. Viscosity

  5. Viscosity

  6. Acid Number

  7. Acid Number

  8. Summary • After 9 months indoor and outdoor storage, the oxidation stability of untreated SBO-based biodiesel decrease with increasing time, while antioxidant can improve the oxidation stability of the biodiesel. • Induction period changes differ depending on antioxidant: TBHQ can improve IP and remain constant for up to 9 months, while PY and PG decrease significant. • PY and PG are not very stable at higher temperature (Summer).

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