Biodiesel Synthesis Of Xanthoceras Sorbiflia Bunge Seed Oil

In order to make full use of local resources, Xanthoceras sorbiflia bunge inAlukerqinqi and Hangjin2#caly were ulilized to synthetize biodiesel in this fhesis,themain contents are as follows:1、It has been studied that Xanthoceras Sorbifolia Bunge seed oil was extracted fromfour kinds of solvents and by three methods, i.e. Soxhlet extraction, microwave assistedextraction, ultrasonic-assisted extraction. The results showed that the optimal extractionsolvent was petroleum ether (60℃-90℃). Tthe effects of factors such as extractiontemperature, extraction times and liquid-solid ratio on the extraction ratio of XanthocerasSorbifolia Bunge seed oil were fully investigated. According to single factor and CentralComposite Design experiment. the predictive model of polynomial quadratic equationwas established by Design Expert software. In the model, extraction temperature,extraction times and liquid-solid were independent variables and oil yield was responsevalue. The model could predict the oil extraction ratio. The results demonstrated that theoptimal extraction temperature was65℃, extraction time was50min and liquid-solidratio were7:1. The oil yield was62.56%under the optimal condition. Physical andchemical test results indicated that specific gravity was0.8459g/cm3and acid value was0.626gKOH/g and saponification value was162.0gKOH/g and the average molecularweight was1042.92g/mol.2、The two step technique was investigated to accomplish biodiesel synthesis withXanthoceras sorbifolia bunge seed oil. Through single factors experiments, theinfluences of ratio between methyl hydrate and Xanthoceras Sorbifolia Bunge seed oil,reaction temperature and dosage of catalyst were discussed. For process optimization ofbiodiesel production from Xanthoceras sorbifolia Bunge seed oil, The Experiment ofbiodiesel synthesis was designed using Central Composite Design. The predictive modelof polynomial quadratic equation was established with Design Expert software. In themodel, ratio between methyl hydrate and Xanthoceras Sorbifolia Bunge seed oil, reactiontemperature and dosage of catalyst were independent variables and biodiesel yield wasresponse value. The model could predict the biodiesel synthesis ratio. The results showedthat the optimal ratio between methyl hydrate and Xanthoceras Sorbifolia Bunge seedoilwas7:1, reaction temperature was62℃and dosage of catalyst was0.9%ofXanthoceras sorbifolia bunge seed oil amount. The biodiesel yield was89.05%under theoptimal condition. Agas chromatography method has been developed for the quantitative determination of fatty acid methyl esters by internal standard method with stearic acidmethyl. The results showed that the main components of biodiesel was methyl palmitate,methyl oleate, methyl linoleate, methyl linolenate and methyl erueate. the fatty acidmethyl esters amount of biodiesel was99.32%by the method3、The Hangjin2#clay was activated by sulfuric acid and the SnO2-Hangjin2#claywas prepared.Then the solid acid catalyst of SO2-4/SnO2-Hangjin2#clay was prepared byimpregnation method with sulfuric acid. The results showed that the concentrations ofSnCl4solution and H2SO4were0.4mol/L,3.0mol/L, respectively. The calcinationtemperature was350℃. The products of the catalyst were characterized and analyzedthrough BET、FT-IR、XRD、TG-DTAand SEM4、The single-step technique was studied on the synthesis of biodiesel fromXanthoceras Sorbifolia bunge seeds in this thesis. The oil extraction and ester exchangereaction was conducted under water bath heating and magnetic stirring with petroleumether as extraction agent, methanol synthesis agent, sodium hydroxide and solid acid asthe catalyst. Through single factor experiments, the influences of temperature ofextraction and reaction, Petroleum ether amount, methanol amount and dosage of catalystwas discussed. In order to optimize of biodiesel synthesis, the single-step technique wasinvestigated to accomplish oil extraction and biodiesel synthesis from Xanthocerassorbifolia bunge seeds using central composite design. The predictive model ofpolynomial quadratic equation was established with Design Expert software. In themodel, temperature of extraction and reaction, Petroleum ether amount, methanol amountand dosage of catalyst were independent variables and biodiesel yield was response value.The model could not only predict the biodiesel synthesis ratio but also calculate oilrecovery. When the catalyst was sodium hydroxid, the results showed that the optimaltemperature of extraction and reaction was77℃, petroleum ether amount was6:1(mL/g),methanol and sodium hydroxide were12%(mL/g) and0.3%(g/g)of Xanthocerassorbifolia bunge seed amount respectively. The biodiesel yield was65.58%under theoptimal condition. When the catalyst was solid acid of SO2-4/SnO2-Hangjin2#clay, theresults showed that the optimal temperature of extraction and reaction was81℃,petroleum ether amount was4:1(mL/g), methanol and sodium hydroxide were12%(mL/g) and0.7%(g/g)of Xanthoceras sorbifolia bunge seed amount respectively. Thebiodiesel yield was90.67%under the optimal condition. The experimental resultsindicated that the single-step technique was more suitable for the use solid acid catalystof SO2-4/SnO2-Hangjin2#clay. Therefore, the single-step technique of biodiesel synthesisfrom Xanthoceras Sorbifolia bunge seeds will has great research potential with SO2-4/SnO2-Hangjin2#clay as catalysts.5、 Chemical constituents and character of production were synthesized bysingle-step through FT-IR and GC, The results showed that the main components ofproduction was methyl palmitate, methyl oleate, methyl linoleate, methyl linolenate andmethyl erueate. The quality criteria of the biodiesel produced from XanthocerasSorbifolia bunge seeds meet the same standards to0#of China and DINV51606ofGermany, The experimental results indicated that biodiesel of Xanthoceras Sorbifoliabunge seeds could substitute for diesel fuel, It could be an efficient approach to resolvethe recent energy crisis.