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Study on Preparation of Biodiesel from Oilstock

Author: LiLi
Tutor: HuJianHua
School: Wuhan Polytechnic University
Course: Cereals, Oils and Vegetable Protein Engineering
Keywords: Oil feet Efficient catalysts Fatty acid Esterification reaction Fatty acid methyl ester Biodiesel
CLC: TE667
Type: Master's thesis
Year: 2008
Downloads: 201
Quote: 1
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Abstract


The key factor restricting the development of bio-diesel is the price of raw materials, looking for a cheap raw material and turn it into the main direction of research. Oil feet with its low cost, wide range of sources to meet the needs of the synthesis of biodiesel. Oil foot is a byproduct in the process of the oil processing, the main active ingredient is the phospholipid and neutral oil, it reach 40% to 60% of the total fatty acid content, the biodiesel can be used as one of the raw materials. This article to the foot of the oil as a raw material, a systematic study of the biodiesel process, reducing the production costs of biodiesel, vegetable oil plant byproduct recycling provides a new way. This article is based the traditional fatty acids Industrial Production, the main process steps to improve by oil foot biodiesel production process route. Research grease hydrolyzed fatty acid mechanism based on the development of new efficient oil atmospheric hydrolysis catalyst and applications in the oil-foot atmospheric hydrolysis process to achieve a satisfactory result. Homemade new efficient catalysts because of its cost, high catalytic efficiency, can be used as a comparison for oil feet catalyst to promote the use of soapstock hydrolysis of fatty acids. Oil feet to the use of a homemade new efficient catalysts atmospheric hydrolysis preparation of the crude fatty acids of acid-catalyzed esterification reaction process route. Through single factor and orthogonal design experiment, draw the the oil foot hydrolysis of crude fatty acids and step esterification prepared biodiesel best reaction conditions. Experimental study of the main conclusions are as follows: (1) acid value of the indexes, optimized by orthogonal experimental design of the fatty acid hydrolysis process to obtain the best combination of process parameters: the amount of catalyst was 3%, 6% of the amount of sulfuric acid, water consumption was 75%, the acid value of the hydrolyzate can of reach 183.96mgKOH / g at 110 ° C hydrolysis under 4H. (2) esterification rate was investigated indicators, based on the single factor and orthogonal experiment to optimize the the disposable methyl optimal conditions: reaction temperature of 65 ° C, the catalyst (sulfuric acid) amount to 2.5%, the amount of methanol to 100% , and the reaction time was 3.5h, and the esterification rate reached 97.84%. Crude methyl ester obtained by the one-step acid-catalyzed esterification subject to subsequent treatment processes to meet the the biodiesel quality requirements. Purification of biodiesel components and performance indicators discussed in this paper. Can achieve the purpose of purification by distillation under reduced pressure, the acid value was still higher after distillation biodiesel, this thesis alkali refining method using sodium silicate (Na2SiO3) deacidification to obtain a low acid value of biodiesel, the resultant product in the The main performance indicators on basic up to the the biodiesel standard requirements. In this thesis, biodiesel products by gas chromatography the qualitative detection analysis. Detected by gas chromatography, the main component of the preparation of biodiesel oil feet methyl palmitate C16: 0 C18: 0, methyl stearate, methyl oleate C18: 1, linoleic acid methyl ester C18: 2 linolenic acid methyl ester C18: 3, peanuts a enoate C20: 1, mustard, methyl C22: 1 methyl ester content of 98% or more.

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CLC: > Industrial Technology > Oil and gas industry > Oil, natural gas processing industry > Synthetic oil > Extraction of oil from other raw materials
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