Biodiesel Titration Example

This worksheet is an example of how to work out a biodiesel titration.

Date 2006/09/01

Where did the Oil Come From?   

1) Fred's French Fries

2) Berty's Slap Chip Shop

3) ___________________

Catalyst used (KOH or NaOH)    KOH

Base Amount (5g for NaOH, 7g for KOH)     7 [call this a]

Purity of catalyst      90 % /100 =   0.9 [call this b] (eg. 90% pure KOH would be 90/100=0.9)

Divide the Base Amount [a] by the Purity [b]    7 / 0.9 = 7.778 [c]. This is now our Adjusted Base Amount.

Titrate three samples of oil and fill in the details below. If any of the results is significantly different from the others then throw the sample away and titrate another one.

Titration 1      4.9    [call this d]

Titration 2      5.1    [call this e]

Titration 3      5.2     [call this f]

Average   [d]+[e]+[f] = 5.066 [call this g]

                        3

Total catalyst needed per liter of oil is 7.78 [c] + 5.066 [g]   = 12.846 [call this h]

Total Liters of oil to be processed = 113 [call this i]

Total catalyst needed is   12.846 [h] x 113 [i] = 1.451 kg

                                                      1000

We will thus add 1.451 kg of KOH into our oil.

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