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Thread: Foolproof Room Temperature (FRT) Biodiesel

  1. #41
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    Re: Foolproof Room Temperature (FRT) Biodiesel

    Hi Mark,

    If you had ever bothered to do even the most cursory research about biodiesel production, you would have immediately found out that there is nothing special about making biodiesel at room temperature.

    I do find it amusing that while you seem to think I know nothing about chemistry, and you know everything because of your two degrees in chemistry, you have based your whole claim about your wonderful "Room Temperature Procedure" because of something you seem to think I said in my instructions in the World Famous Dr Pepper Technique (Pat Pend)
    For some reason you seem to think that I said that you have to do the standard method at 55C or the reaction will not proceed. Of course I never said anything of the sort. More importantly, while you continually tell everyone about your two amazing degrees in chemistry, you never even bothered to verify your claim that the standard method would not proceed at room temperature.
    You seem to think this room temperature aspect is one of the two most important parts of your procedure and that the standard procedure requires heating, yet you never bothered to perform a simple 15 minute experiment to verify for yourself whether the standard method of producing biodiesel requires heating or not.

    Different techniques for the production of biodiesel from waste vegetable oil
    A. A. Refaat
    Department of Chemical Engineering, Faculty of Engineering, Cairo University, Egypt

    Received 13 October 2009; revised 8 November 2009; accepted 20 November 2009; available online 1 December 2009

    Reaction temperature
    Temperature has no detectable effect on the ultimate conversion to ester.
    However, higher temperatures
    decrease the time required to reach maximum conversion ( Pinto et al 2005). Transesterification can be conducted at various temperatures ranging from room temperature to the boiling point of the alcohol employed (68o C in case of methanol) so that the reactor does not need to be pressurized (van Gerpen, 2005).
    http://www.bioline.org.br/pdf?st10020






    Last edited by tillyfromparadise; 1st May 2019 at 01:19 PM.

  2. #42
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    Re: Foolproof Room Temperature (FRT) Biodiesel

    Quote Originally Posted by Dr Mark View Post
    Mine has none. Heating is never required at any stage
    F
    So you mean I can use your method and make biodiesel from my 200 litre block of lard without first having to heat it until it melts?
    I find that totally amazing.

    Can't wait to give it a crack this weekend.

  3. #43
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    Re: Foolproof Room Temperature (FRT) Biodiesel

    Dr Mark You asked for my reference on drying alcohol, but I can't find where the question was. My reference is Textbook of Practical Organic Chemistry , Longman (publishers) , by Arthur Vogel , 3rd edition. It's a legal proceedure here if done with an industrial alcohol distillers' license or done in a university.

  4. #44
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    Re: Foolproof Room Temperature (FRT) Biodiesel

    No. This method was developed for use with liquid oil only.

    Obviously if you are using lard you will have to melt it first. The point is that with this method, unlike with the Dr Pepper method, heat is not required to initate the reaction
    Last edited by Dr Mark; 8th May 2019 at 06:19 PM.

  5. #45
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    Re: Foolproof Room Temperature (FRT) Biodiesel

    Method update:

    One aspect of this method that I didn't like was the long clarification time - about a month between the generation of the raw material and its use in my car.

    I'd always figured this is a problem that could be solved by just more vigorous bubbling - therefore increasing the rate of evaporation of the xs MeOH

    So I got an air pump off EBay for about $80 with a 100W motor that blasted air at 80LPM, which resulted in more vigorous bubbling.

    The result of this is that the bio was ready to use after a week, which makes things a whole lot easier for me.

    Also, as I've become aware that this method uses about twice as much (apparently) catalyst as the Dr Pepper method, I'm going to attempt to optimise it.

    If I can reduce the level of catalyst, that will cut a few cents off the cost and reduce the amount of solid waste generated. Stay tuned

  6. #46
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    Re: Foolproof Room Temperature (FRT) Biodiesel

    REDUCE THE AMOUNT OF CATALYST! Blimey that's radical. Sorry Mark I couldn't resist that little dig. Glad to hear it though. Maybe you could even try titrating your oil. I look forward to your results.
    Johnnojack
    4WD Isuzu Jackaroo 3.1 190000km on WVO,(2019) 2 tank home built system 6 solenoids heated filter, fuel line and tank pickup for thicker oil. Mk. 9 version now and no changes planned
    Mercedes W201 190D 1986 model: no fuel mods except bigger fuel line from tank, running blend of 90% oil 10% petrol 11000km to date. Motor purrs but car has electrical gremlins

  7. #47
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    Re: Foolproof Room Temperature (FRT) Biodiesel

    Hi Mark

    Quote Originally Posted by Dr Mark View Post
    Method update:

    Also, as I've become aware that this method uses about twice as much (apparently) catalyst as the Dr Pepper method, I'm going to attempt to optimise it.
    But you only recently increased the KOH from 15g to 20g. Maybe you need to further increase the amount of KOH you are using- say to 25g or 30g KOH per litre of oil.


    If I can reduce the level of catalyst, that will cut a few cents off the cost and reduce the amount of solid waste generated. Stay tuned
    Do you mean you finally realize that the HUGE glycerol layer you are producing because of the massive amount of KOH you use in the reaction is a big waste.
    PS you forgot to tell everyone about your degrees in chemistry

  8. #48
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    Re: Foolproof Room Temperature (FRT) Biodiesel

    Dr Mark Are you still drying your methoxide solution prior to the transesterification reaction? Maybe drying with cement? Le Chatlier's principle would indicate one advantage to that in the increase in methoxide concentration in solution but making soaps bonded to a metal with a valence of 2 is not good. Calcium soap, magnesium soap would be difficult to remove from biodiesel product. In the case of drying with calcium oxide , calcium hydroxide would be soluble in methanol/ methoxide solution to a degree and would make calcium soaps , combining with free fatty acids present in used vegetable oil.

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