1. Oxidative Stability of SBO, PO and CWG-based biodiesel
Project Status Report
Rhet de Guzman
03/25/2008

2. Biodiesel Oxidative Stability
Anti-oxidants:
1) α-T - α-Tocopherol
2) IB - IONOL BF200
3) BHT - 2,6-Di-tert-butyl-4-methylphenol
4) BHA - FCC Butylated hydroxyanisole, 98.5+% FCC
5) DTBHQ - 2,5-Di-tert-Butyl-hydroquinone, 99%
6) TBHQ – tert-Butylhydroquinone, 97%
7) PG - Propyll Gallate
8) PY – Pyrogallol, 99%
Anti-oxidants in 1000ppm, 500ppm and 250ppm concentrations

3. SBO-based biodiesel Oxidative Stability
SBO ND
Anti-oxidant conc
Ratio
250 PPM
500 PPM
1000 PPM
Blank
2.52 1
α-T
2.54
2.72
3.01 IB
3.02
3.48
4.3
BHT
2.95
3.34
4.32
BHA
3.31 4
5.43
DTBHQ
3.55
TBHQ
2.91
3.42
4.75 PG
8.47
11.08
14.75 PY
12.76
16.03
18.43

4. SBO-based biodiesel Oxidative Stability
Results:

5. PO-based biodiesel Oxidative Stability
PO ND
Anti-oxidant conc
Ratio
250 PPM
500 PPM
1000 PPM
Blank
7.35 1
α-T
6.17
6.66
7.66 IB
8.66
10.25
13.99
BHT
7.77
9.12
11.41
BHA
12.11
17.24
25.02
DTBHQ
6.28
6.68
8.63
TBHQ
7.82
7.81
11.72 PG
21.86
31.74
44.97 PY
29.63
40.68
54.84

6. PO-based biodiesel Oxidative Stability
Results:

7. CWG-based biodiesel Oxidative Stability
CWG ND
Anti-oxidant conc
Ratio
250 PPM
500 PPM
1000 PPM
Blank
2.35 1
α-T
3.51
4.23
5.41
1.8 IB
3.38
6.51
9.22
BHT
5.27
6.74
9.3
BHA
7.19
11.11
14.85
DTBHQ
4.64
6.31
12.05
TBHQ
7.28
12.14
23.02 PG
14.2
22.92
30.66 PY
26.07
34.97
40.58

8. CWG-based biodiesel Oxidative Stability
Results:

9. Biodiesel Oxidative Stability
Results:

10. Biodiesel Oxidative Stability