G’day mates,
I found the following report while researching Biodiesel and as I have only read about forum members using methanol to make BD, I was wondering if any of you have tried making your BD using “ethanol” in place of “methanol”, or if you have tried both ways, what, in your opinion, is the best way for making BD?
Here’s the info’ on Ethanol based BD:
The HySEE (BD) fuel production process utilizes 70 percent stoichiometric excess ethanol (absolute, 100 percent pure), or a molar ratio of 5.1: 1 ethanol to oil ratio. The total free fatty acids are determined and neutralized with the calculated addition of catalyst. Based on the amount of input oil by weight, 1.3 percent of KOH is used plus the amount to neutralize the free fatty acids. The following equations were used for the quantities processed:
EtOH = 0.2738 x Oil KOH = Oil/85
where: Oil = desired amount of oil, in liters
EtOH = amount of ethanol needed, in liters
KOH = amount of potassium hydroxide required, in kg
The waste hydrogenated soybean oil is heated to 49 degrees Celsius (120 degrees Fahrenheit). The catalyst is dissolved into the alcohol by vigorous stirring in a small reactor. The oil is transferred into the Biodiesel reactor and then the catalyst/alcohol mixture is pumped into the oil and the final mixture stirred vigorously for two hours. A successful reaction produces two liquid phases: ester and crude glycerol. Crude glycerol, the heavier liquid will collect at the bottom after several hours of settling. Phase separation can be observed within 10 minutes and can be complete within two hours after stirring has stopped. Complete settling can take as long as 20 hours. After settling is complete, water is added at the rate of 5.5 percent by volume of the oil and then stirred for 5 minutes and the glycerol allowed to settle again. After settling is complete the glycerol is drained and the ester layer remains. Washing the ester is a two step process which is carried out with extreme care.
A water wash solution at the rate of 28 percent by volume of oil and 1 gram of tannic acid per liter of water is added to the ester and gently agitated. Air is carefully introduced into the aqueous layer while simultaneously stirring very gently. This process is continued until the ester layer becomes clear. After settling, the aqueous solution is drained and water alone is added at 28 percent by volume of oil for the final washing.
*********************
I would like to hear what you think about using Ethanol in place of Methanol to make BD.
By the way, this project was undertaken by the University of Idaho, Department of Agricultural Engineering in July 1995, under contract to the Idaho Department of Water Resources (IDWR). The project was made possible in part with funds provided by the U.S. Department of Energy (USDOE) through the Pacific-Northwest and Alaska Regional Bioenergy Program.
The report was prepared by:
Charles L. Peterson, Professor; Daryle Reece, Engineering Technician;
Brian Hammond, Graduate Assistant; Joseph C. Thompson, Engineering Technician;
Sidney Beck, Professor Emeritus, Bacteriology.
I’m looking forward to any and all posts on the above as I’m one of those people who enjoys sharing different points of view.
Cheers mates,
Bill from Corio
I found the following report while researching Biodiesel and as I have only read about forum members using methanol to make BD, I was wondering if any of you have tried making your BD using “ethanol” in place of “methanol”, or if you have tried both ways, what, in your opinion, is the best way for making BD?
Here’s the info’ on Ethanol based BD:
The HySEE (BD) fuel production process utilizes 70 percent stoichiometric excess ethanol (absolute, 100 percent pure), or a molar ratio of 5.1: 1 ethanol to oil ratio. The total free fatty acids are determined and neutralized with the calculated addition of catalyst. Based on the amount of input oil by weight, 1.3 percent of KOH is used plus the amount to neutralize the free fatty acids. The following equations were used for the quantities processed:
EtOH = 0.2738 x Oil KOH = Oil/85
where: Oil = desired amount of oil, in liters
EtOH = amount of ethanol needed, in liters
KOH = amount of potassium hydroxide required, in kg
The waste hydrogenated soybean oil is heated to 49 degrees Celsius (120 degrees Fahrenheit). The catalyst is dissolved into the alcohol by vigorous stirring in a small reactor. The oil is transferred into the Biodiesel reactor and then the catalyst/alcohol mixture is pumped into the oil and the final mixture stirred vigorously for two hours. A successful reaction produces two liquid phases: ester and crude glycerol. Crude glycerol, the heavier liquid will collect at the bottom after several hours of settling. Phase separation can be observed within 10 minutes and can be complete within two hours after stirring has stopped. Complete settling can take as long as 20 hours. After settling is complete, water is added at the rate of 5.5 percent by volume of the oil and then stirred for 5 minutes and the glycerol allowed to settle again. After settling is complete the glycerol is drained and the ester layer remains. Washing the ester is a two step process which is carried out with extreme care.
A water wash solution at the rate of 28 percent by volume of oil and 1 gram of tannic acid per liter of water is added to the ester and gently agitated. Air is carefully introduced into the aqueous layer while simultaneously stirring very gently. This process is continued until the ester layer becomes clear. After settling, the aqueous solution is drained and water alone is added at 28 percent by volume of oil for the final washing.
*********************
I would like to hear what you think about using Ethanol in place of Methanol to make BD.
By the way, this project was undertaken by the University of Idaho, Department of Agricultural Engineering in July 1995, under contract to the Idaho Department of Water Resources (IDWR). The project was made possible in part with funds provided by the U.S. Department of Energy (USDOE) through the Pacific-Northwest and Alaska Regional Bioenergy Program.
The report was prepared by:
Charles L. Peterson, Professor; Daryle Reece, Engineering Technician;
Brian Hammond, Graduate Assistant; Joseph C. Thompson, Engineering Technician;
Sidney Beck, Professor Emeritus, Bacteriology.
I’m looking forward to any and all posts on the above as I’m one of those people who enjoys sharing different points of view.
Cheers mates,
Bill from Corio
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