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Response Surface Methodology to Optimize Production of Biodiesel from the Mixture of Soybean Oil Sediments and Soapstock(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2008年03期
Page:
496-500,531
Research Field:
Publishing date:

Info

Title:
Response Surface Methodology to Optimize Production of Biodiesel from the Mixture of Soybean Oil Sediments and Soapstock
Author(s):
JIN BoZHU MinFAN PeiZHAO Jun-yiYU Long-jiang
College of Life Science and Technology,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China
Keywords:
BiodieselResponse surface methodologyOil sedimentsSoapstockEsterification reaction
PACS:
TQ641
DOI:
10.11861/j.issn.1000-9841.2008.03.0496
Abstract:
s the global fossil fuel deficiency and environmental degradation are becoming more and more serious,biodiesel is received increasing attention as an alternative,non-toxic,biodegradable and renewable diesel fuel.The production of biodiesel from the mixture of soybean oil sediments and soapstock was investigated in this work.In the first step,the mixture was extracted with ethyl ether and the mixture was divided into three phases.Ratio of the weight of mixture to the volume of solvent was 1:2(g : mL),and extracted at room temperature for 2 h.The organic top phase contained triglycerides and phosphatides was extracted withcooled acetone and the acetone insoluble(phosphatides),a fairly high value by-product,was obtained,which could reuse and reduce the cost of biodiesel production.The triglycerides were also separated.In the second step,soap phase was then acidified with sulfuric acid to yield fatty acid.The mixed fatty acid was efficiently converted to methyl esters by acid-catalyzed esterification.The response surface methodology was used to optimize the esterification reaction conditions of fatty acid.Results showed the factors influence the esterification reaction was the molar ratio of methanol to oil,reaction temperature and reaction time,orderly.The molar ratio of methanol to oil and the reaction temperature had significant interaction.The optimal reaction were 5:1 methanol/ fatty acid(mol/mol) with 3% H2S04(wt%) reacted at 87℃ for 4.74 h,giving a maximum ester yield of 92.5%.

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Last Update: 2014-10-08