膦酸功能化催化材料的合成及其在生物柴油制备过程中的性能研究

发布时间：2018-04-07 17:34

本文选题：膦酸基团催化材料　切入点：响应面分析　出处：《鲁东大学》2015年硕士论文

【摘要】：随着能源储备的耗尽，石油价格的上涨以及人们对环境问题的关注程度加大，所以制备生物柴油就变成了一项紧迫的研究课题。生物柴油具有许多优点：排放尾气十分清洁，可再生，可降解，低毒，使用和储存安全性高，可以以任意比例与石化能源混合使用。因为含膦酸基团的材料在制备生物柴油方面研究的比较少,本文重点研究了含膦酸基团改性催化材料的制备方法,以及膦酸改性催化材料在获取生物柴油中的最佳催化条件。 1.以硅藻土、四氧化三铁为基质，分别制备了膦酸改性的硅藻土，膦酸改性的四氧化三铁。研究了两种催化材料在获取生物柴油中的最佳催化条件。应用响应面软件优化出了催化剂量，醇与酸的摩尔之比和反应采取温度的最佳值。膦酸改性的硅藻土最佳优化条件为催化剂量是10.32%，醇与酸的摩尔之比为10.3:1，反应使用的温度为87.8oC，此时，生物质柴油产率是95.13%。膦酸改性的四氧化三铁最佳优化条件为催化剂量是9.58%，醇与酸的摩尔之比为8.7:1，反应采取温度为93.2oC，此时，生物质柴油产率是92.91%。 2.首先研究了海藻酸铁的制备方法，然后，以海藻酸铁为基质，制备了膦酸改性的海藻酸铁。应用响应面软件优化出了催化剂量，醇与酸的摩尔之比和实验采取的温度的最佳值。发现温度是影响反应的最根本的因素，最佳条件：催化剂用量是9.53%，醇与酸的摩尔之比为8.62:1，反应采取的温度是91.0oC，此时，生物质柴油产率是93.17%。 3.利用吸附法合成固化LVK酶，研究了固化LVK酶在生产生物柴油中的最佳催化条件。应用响应面软件优化出了催化剂量，醇与油的摩尔之比，反应采用的温度，水的含量，反应采取的时间的最佳值。最佳优化条件为催化剂采用量是22.15%，醇与油的摩尔比是4.45:1，反应采用的温度为44.2oC，水份含量值为7.45%，反应得时间为12.96h。制取的生物柴油的产率是86.74%。
[Abstract]:With the depletion of energy reserves, the rise of oil prices and the increasing attention to environmental problems, the preparation of biodiesel has become an urgent research topic.Biodiesel has many advantages: exhaust gas is very clean, renewable, degradable, low toxicity, high safety in use and storage, and can be mixed with petrochemical energy in any proportion.Because there is little research on the preparation of biodiesel from phosphonic acid group materials, the preparation method of phosphonic acid group modified catalytic materials and the optimum catalytic conditions of phosphonic acid modified catalytic materials in obtaining biodiesel have been studied in this paper.1.Diatomite modified by phosphonic acid and iron trioxide modified by phosphonic acid were prepared by using diatomite and ferric oxide as substrate.The optimum catalytic conditions of two kinds of catalytic materials in obtaining biodiesel were studied.The amount of catalyst the molar ratio of alcohol to acid and the optimum reaction temperature were optimized by using response surface software.The optimum conditions of diatomite modified by phosphonic acid were as follows: the amount of catalyst was 10.32, the molar ratio of alcohol to acid was 10.3: 1, the reaction temperature was 87.8 OC, and the yield of biodiesel was 95.13%.The optimum conditions of phosphonic acid modified Fe _ 2O _ 3 were as follows: catalyst amount was 9.58, molar ratio of alcohol to acid was 8.7: 1, reaction temperature was 93.2 OC, and the yield of biodiesel was 92.91%.2.The preparation method of ferric alginate was studied firstly, and then the phosphonic acid modified iron alginate was prepared by using ferric alginate as substrate.The amount of catalyst the molar ratio of alcohol to acid and the optimum temperature of the experiment were optimized by using the response surface software.It was found that temperature was the most fundamental factor affecting the reaction. The optimum conditions were as follows: the amount of catalyst was 9.53, the molar ratio of alcohol to acid was 8.62: 1, the reaction temperature was 91.0 OC, and the yield of biodiesel was 93.17%.3.The optimum catalytic conditions of solidified LVK enzyme in biodiesel production were studied by using adsorption method.The optimum values of catalyst amount, molar ratio of alcohol to oil, reaction temperature, water content and reaction time were optimized by using response surface software.The optimum conditions are as follows: the amount of catalyst is 22.15%, the molar ratio of alcohol to oil is 4.45: 1, the reaction temperature is 44.2 OC, the water content is 7.45 and the reaction time is 12.96 h.The yield of biodiesel is 86.74.
【学位授予单位】：鲁东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：O643.36;TE667

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