Report : Long stability-soy based biodiesel (B100)

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Presentation transcript:

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

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

Induction Period

Viscosity

Kinematic viscosity ( mm2/s) Kinematic viscosity ( mm2/s) Antioxidant Indoor Outdoor Control 2-mon 4-mon 6-mon 9-mon blank 4.321 4.291 4.326 4.364 4.419 4.292 4.299 4.319 4.329 α-T 4.381 4.35 4.353 4.373 4.396 4.339 4.352 4.384 4.423 IB 4.295 4.325 4.307 4.288 4.306 4.322 BHT 4.302 4.323 4.313 4.331 4.312 4.293 4.317 4.334 BHA 4.315 4.344 4.379 4.297 4.33 4.394 DTBHQ 4.298 4.3 4.304 4.311 4.314 4.303 4.309 TBHQ 4.316 4.318 PG 4.324 4.338 4.363 4.361 4.346 4.337 4.369 PY 4.348 4.32 4.377 4.332 4.301

Acid Number

Acid Number Acid Number ( mg KOH/g) Antioxidant Indoor Outdoor Control Acid Number ( mg KOH/g) Antioxidant Indoor Outdoor Control 2-mon 4-mon 6-mon 9-mon blank 0.176 0.217 0.245 0.27 0.296 0.214 0.233 0.242 0.282 α-T 0.224 0.238 0.205 0.225 0.239 0.263 IB 0.212 0.223 0.234 0.209 0.229 0.237 BHT 0.211 0.22 0.23 0.246 0.244 0.232 0.243 BHA 0.203 0.194 0.235 0.204 0.216 0.228 DTBHQ 0.208 0.256 0.247 0.29 TBHQ 0.222 0.231 0.227 PG 0.496 0.479 0.519 0.792 0.546 0.485 0.508 0.78 0.3 PY 0.914 0.743 0.478 0.445 0.373 0.988 0.797 0.511

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).