Senior Engineer
Engineering Center BPPT Indonesia
Dear Mr. Rahmadi:
1.- Do you estimate that is theoretically correct to say that after acid
esterification (using heterogeneous catalyst) the remaining oils and fats
can be incorporated into feed rations formulation?.
2.- Could you please tell me: Once the excess of methyl alcohol has been
removed, is there any industrial technique (besides molecular distillation)
that allows separation of methyl esters from mon-di-tri-glycerides (oils &
fats)?.
Thanks in advance,
Mr. F.J. Burgos
----- Original Message -----
From: "Arie Rahmadi" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, February 02, 2005 12:13 AM
Subject: Re: [Biofuel] Pre transesterification with heterogen catalyst
Dear Iwan,
In my opinion, you got soap because significant FFA still present in the
CPO.
You may either do the following two alternatives:
1. You may remove the free fatty acid in Crude Palm Oil by reacting with
NaOH and separate the soap using a centrifuge, do the transesterification
reaction and wash the products with warm water to remove glycerol, some
methanol and NaOH. You may use physical process of deacidification of CPO,
but I don't think it will be suitable for a lab scale experiment as it
needs
high vacuum and relatively high temperature of operation and off course
availability of heating media such as steam or heating oil.
2. You may carry out esterification of Free fatty acid using Acid Catalyst
such as H2SO4, followed by Transesterification of triglycerides in CPO
using
base catalyst. The rest, you may do the usual step by washing the products
with warm water and recover methanol using distillation and further
purification of your glycerol.
We have tried the method in our pilot plant (1.5 tonnes per day) in
PUSPITEK
Serpong Indonesia, and it works well for the CPO feed stock that
characteised by high FFA content. I will leave it up to you the exact
amount
of catalysts and methanol .
Good Luck,
Arie Rahmadi
Senior Engineer
Engineering Center BPPT Indonesia
----- Original Message -----
From: "Iwan Prawito" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, February 01, 2005 10:22 PM
Subject: [Biofuel] Pre transesterification with heterogen catalyst
Dear,
I have an laboratorium experiment about biodiesel from crude palm oil
(CPO). my CPO have high FFA (acid value 46)
first, I try to remove the FFA with esterification. I used cation
exchanger (Amberlite) as catalyst. its succes to reduce the acid value
from
46 to 1.3.
then, transesterified using KOH as catalyst. after this reaction, I wash
the ester using warm water. but, I found a lot of soap when I mix the
ester
with water. I can't explain why, may somebody help me?
Regards,
Iwan Prawito
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