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题名	高酸价原料生产生物柴油; Biodiesel Production from Feedstocks with High Acid Values
作者	王忠铭
学位类别	博士
答辩日期	2008-03-20
授予单位	中国科学院广州能源研究所
授予地点	广州能源研究所
导师	吴创之
关键词	煎炸废油 地沟油 豆油皂脚 麻疯树油 生物柴油
其他题名	Biodiesel Production from Feedstocks with High Acid Values
中文摘要	Energy safety and environment protection play key role in the sustainable development of our country. As an environment friendly renewable energy, bodiesel is considered as a promising alternative of fossil diesel. Refined rapeseed and soybean oils in China are too expensive to make biodiesel competitive in the market. High price of feedstock becomes the bottleneck for biodiesel development. This research focus on the utilization of low cost feed stock, such as used frying oil, trap grease, soap stock and jatropha oil with high acid value. Comparison and optimization of the technologies related to different feedstocks have been conducted in this work. Biodiesel production from used frying oil and trap grease via acid catalysis was carried out in a pressurized reactor. Through central rotatable design, two quadric polynomial models were obtained. Methanol, sulfuric acid loading and the reaction time were the significant factors influenced the ester content of the biodiesel. This result provided reliable data for acid catalyzed both esterification and transesterification. Studies on the activity of solid acid (Amberlyst-15) concluded that used frying oil could be esterified at 60℃ and jatropha oil with about 5% free fatty acids, trap grease with 50% free fatty acids should be treated at 90℃, 95℃. A novel separation process of soapstock at room temperature was developed through dilution with water, pH control of the followed acidulation. Yield of acid oil can be achieved at 97% and 91~93% based on fresh soapstock and fermented soapstock respectively. Water content of excess methanol and reaction time were taken as two independent variables, the acid values of jatropha oil were taken as response surface, and a quadric polynomial model was established through a full factorial design. A high efficient method was developed by 20 verification experiments carried out based on this model. The total sulfuric acid and the average reaction time were decreased significantly, which is valueble for biodiesel commercialization using jatropha oil as feedstock. A small pilot plant with a capacity of 200tons/year was designed based on the results of the experiments in the laboratory. Tung oil with an acid value of 7.12mgKOH/g was esterified in the fixed reactor, and then it was transesterified in the plug flow reactor continuously. Economic analysis showed that the profitability of biodiesel production from trap grease was sensitive to the change of prices of trap grease and biodiesel. Budget deficit is expected if the price of trap grease increases 10% or the price of biodiesel decreases 10% while other factors are stable. The effect of biodiesel price is more significant than the price of trap grease. The change of methanol and glycerol price is less important because of the sum of them relative to the trap grease and biodiesel is small.
语种	中文
公开日期	2011-07-10 ; 2011-07-15
页码	140
内容类型	学位论文
源URL	[http://ir.giec.ac.cn/handle/344007/4057]
专题	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	王忠铭. 高酸价原料生产生物柴油, Biodiesel Production from Feedstocks with High Acid Values[D]. 广州能源研究所. 中国科学院广州能源研究所. 2008.

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