Acid Value of Oils by Titration for Biodiesel

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  • เผยแพร่เมื่อ 22 ธ.ค. 2024

ความคิดเห็น • 43

  • @liewmeitheng3621
    @liewmeitheng3621 4 ปีที่แล้ว +2

    The use of Phenolphthalein indicator can have colour change to orange or red?

    • @fathielzahra
      @fathielzahra 3 ปีที่แล้ว

      From colorless to pale pink colour

  • @elchicousana2
    @elchicousana2 ปีที่แล้ว

    Whqt do you use to disolve the oil for tritation test?
    .and which indicator do you use? Fenoftalein?

  • @baco.4977
    @baco.4977 6 หลายเดือนก่อน

    Kindly, can I know what's happened if I increase sodium hydroxide percentage when producing biodiesel, is it effect on Biodiesel quality or ot can be harsh to car engine?

  • @vadlayaswanthachary5516
    @vadlayaswanthachary5516 2 หลายเดือนก่อน

    Sir please tell me crude glycerine purification process

  • @samratenterprise2678
    @samratenterprise2678 6 ปีที่แล้ว +2

    How to do pretreatment of Acid oil having FFA of 35.????

    • @BiodieselEducation
      @BiodieselEducation  6 ปีที่แล้ว +1

      You may want to check out this TechNote, which has some tips and procedures for FFA pretreatment. biodieseleducation.org/Literature/TechNotes/TN33%20High%20FFA.pdf. You may find other helpful info on our website, www.biodieseleducation.org.

    • @LabAnaysis1385
      @LabAnaysis1385 2 ปีที่แล้ว

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  • @unzajamil1483
    @unzajamil1483 6 ปีที่แล้ว +1

    could you please explain how to find the normality of KOH? does it varies ?

    • @BiodieselEducation
      @BiodieselEducation  6 ปีที่แล้ว +1

      We follow the ASTM Standards for testing our normality. Mixed solutions of bases can degrade over time and need to be replaced. The method of standardizing the potassium hydroxide solution is outlined in ASTM D974 under 7.7.1:
      "Standardize frequently enough to detect changes of 0.0005 N. On way to do this is as follows: Weigh, to the nearest 0.1 mg approximately 0.2 g of potassium hydroxide alcoholic solution to either of the following end points. (1) When the titration is electromagnetic, titrate to a well-defined inflection point at the voltage that corresponds to the voltage of the basic buffer solution, or (2) When titration is colorimetric, add six drops of phenolphthalein indicator solution and titrate to the appearance of a permanent pink color. Perform the blank titration on the water used to dissolve the potassium acid phthalate. Calculate the normality using the following equation: Normality = ((Wp / 204.23) x (1000/(V-Vb))) (1) where: Wp - weight of potassium acid phthalate, g, 204.23 = molecular weight of the potassium acid phthalate, V = volume of the titrant used to titrate the salt to a specific end point, mL, and Vb = volume of titrant used to titrate the blank, mL."

    • @LabAnaysis1385
      @LabAnaysis1385 2 ปีที่แล้ว

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  • @saadkoko2040
    @saadkoko2040 4 ปีที่แล้ว

    in the solvent which material I can use instead of toluene.

  • @johnmarkmosqueda1043
    @johnmarkmosqueda1043 5 ปีที่แล้ว

    what is the burette used in the experiment?

  • @MrRudra87
    @MrRudra87 5 ปีที่แล้ว +1

    Can you explain me why the acid value need to divide by 2 to get FFA% ? can anyone explain the link between AV and FFA?

    • @BiodieselEducation
      @BiodieselEducation  5 ปีที่แล้ว

      This website does a good job breaking the calculation down: www.make-biodiesel.org/Biodiesel-Chemsitry/acid-number-to-ffa-conversions.html

    • @LabAnaysis1385
      @LabAnaysis1385 2 ปีที่แล้ว

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    • @LabAnaysis1385
      @LabAnaysis1385 2 ปีที่แล้ว

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  • @akliluassefa6969
    @akliluassefa6969 3 ปีที่แล้ว

    Can you have ASTM standards in pdf?

  • @myeongkang6155
    @myeongkang6155 4 ปีที่แล้ว

    Hi what percentage of alcohol is the isopropyl alcohol needed for this experiment?

    • @frecmenta5114
      @frecmenta5114 3 ปีที่แล้ว

      I would say its 1 to 5 where 1 is the alcohol and 5 the oil and also 35 grams of catalyst ( potasyum or sodium hidroxide ) to a liter to five liters

    • @LabAnaysis1385
      @LabAnaysis1385 2 ปีที่แล้ว

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  • @sweathaswea4660
    @sweathaswea4660 3 ปีที่แล้ว

    I have 0.1 n sodium thiosulfate how to convert 0.01 sodium thiosulfate can u explain me

    • @LabAnaysis1385
      @LabAnaysis1385 2 ปีที่แล้ว

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  • @sumisajeev91
    @sumisajeev91 4 ปีที่แล้ว

    How can we reduce the acid value of a given sample?

    • @LabAnaysis1385
      @LabAnaysis1385 2 ปีที่แล้ว

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  • @4four0206
    @4four0206 6 ปีที่แล้ว

    Can I use sulfuric acid as my catalyst? What is the standard formula for extra catalyst needed?

    • @BiodieselEducation
      @BiodieselEducation  6 ปีที่แล้ว

      Hello, thanks for reaching out to us! What is your acid value, and do you plan on using sulfuric acid for the entire reaction or only for converting the three fatty acid's to esters?

    • @4four0206
      @4four0206 6 ปีที่แล้ว

      Hi, thanks for your reply! My acid value is about 20, I'm planning to use sulfuric acid as catalyst to reduce my feedstock's FFA and then proceed with transesterification.

    • @BiodieselEducation
      @BiodieselEducation  6 ปีที่แล้ว +2

      With an acid value of 20 your % FFA will be approximately 10. It is determined based on the average molecular weight of the fatty acids that make up the oil or fat you are using but it is roughly half the AV.
      We don’t know how large of a batch you are making but the formula is as follows:
      For every gram of FFA add 2.2 grams of methanol and 0.05 grams of sulfuric acid
      Always add the acid to the methanol to avoid splatter and gently mix.
      Heat the oil to 60 C and add the alcohol/acid mixture and stir for 1 hour.
      Upon settling you should have a layer of alcohol acid and water floating on top. Water is generated during the esterification reaction.
      The trick is to drain off the pretreated oil/ester mixture without getting any of the top layer with it.
      Then measure the new acid value. If it is still too high you can perform another acid esterification using the new value to calculate methanol and acid.
      Here is an example: If you are starting with 500 g of oil with 10% FFA you would have 50 grams of FFA’s
      You would need 112.5 g of methanol and 2.5 g of sulfuric acid for the reaction.
      If you are making a large batch you can use lbs or Kg to calculate the amounts. Good luck!

    • @lakshayahissaria4823
      @lakshayahissaria4823 4 ปีที่แล้ว

      How to calculate methanol and sodium methoxide for transesterifacion?

    • @nicholassimmons9706
      @nicholassimmons9706 3 ปีที่แล้ว

      @@lakshayahissaria4823 methanol use a 6 mols methanol per mol oil; oil is about 876 g/mol. Use density of oil to calculate mass from volume.
      The catalyst values are reviewed in the video. 1% w/w for KOH and 0.25% w/w for Sodium Methoxide + the compensation for FAA's.

  • @usmanghori8465
    @usmanghori8465 6 ปีที่แล้ว

    which solvent you used ?

  • @mudzaffarafzan
    @mudzaffarafzan 6 ปีที่แล้ว +1

    I have some doubts and need clarifications. According to the ASTM D974 Test Method, KOH can be substituted with NaOH. Is that correct? Also, I am dealing with waste oil from palm oil oleochemical refinery and the oil color is dark. Very dark and in room temperature, the viscosity is very high. How do you reckon if I insist on using this method instead of D664? Will the data be too inaccurate?

    • @BiodieselEducation
      @BiodieselEducation  6 ปีที่แล้ว

      Either base should be able to be used as long as the correct weights and molar densities are used. Either ASTM test should be fine to determine acid number as long as they are followed correctly.

    • @nicholassimmons9706
      @nicholassimmons9706 3 ปีที่แล้ว

      KOH is a superior catalyst for the reaction I believe

  • @gauravtiwari13
    @gauravtiwari13 4 ปีที่แล้ว

    Sir how to reduce high acid value of biodiesel please sir reply

    • @LabAnaysis1385
      @LabAnaysis1385 2 ปีที่แล้ว

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  • @nicholassimmons9706
    @nicholassimmons9706 3 ปีที่แล้ว

    Has anyone ever used pH 1 saturated HCL solution to wash soapy/impure biodiesel? I have found in the past it cleans everything up quite nice with no emulsions and all in one go. One and done.

  • @surbhibelose4292
    @surbhibelose4292 6 ปีที่แล้ว

    Plzz give the proper procedure

    • @BiodieselEducation
      @BiodieselEducation  6 ปีที่แล้ว

      From ASTM D974 under 7.7.1:
      "Standardize frequently enough to detect changes of 0.0005 N. On way to do this is as follows: Weigh, to the nearest 0.1 mg approximately 0.2 g of potassium hydroxide alcoholic solution to either of the following end points. (1) When the titration is electromagnetic, titrate to a well-defined inflection point at the voltage that corresponds to the voltage of the basic buffer solution, or (2) When titration is colorimetric, add six drops of phenolphthalein indicator solution and titrate to the appearance of a permanent pink color. Perform the blank titration on the water used to dissolve the potassium acid phthalate. Calculate the normality using the following equation: Normality = ((Wp / 204.23) x (1000/(V-Vb))) (1) where: Wp - weight of potassium acid phthalate, g, 204.23 = molecular weight of the potassium acid phthalate, V = volume of the titrant used to titrate the salt to a specific end point, mL, and Vb = volume of titrant used to titrate the blank, mL."