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Vapor-Liquid Equilibrium of ethyl Acetate+C_nH_(2n+1)OH(n=1,2,3) Binary Systems at 0.3 MPa

Chinese Journal of Chemical Engineering 2012年第4期20卷 723-730页

作者： SUSIAL P. RODRIGUEZ-HENRIQUEZ J.J. SOSA-ROSARIO A. RIOS-SANTANA R. School of Industrial and Civil Engineering University of Las Palmas de Gran CanariaCanary IslandsSpain

Vapor-liquid equilibrium data for the binary systems of ethyl acetate + methanol,ethyl acetate + ethanol and ethyl acetate + 1-propanol at 0.3 MPa were *** experimental data were verified with the point-to-point test of van Ness(1973).All these systems present an azeotropic point at 0.3 MPa that increases in ester composition for longer alcohol *** UNIFAC in different versions and ASOG prediction models were applied.

关键词： vapor-liquid equilibrium vapor-liquid equilibrium isobaric data ethyl ester alcohol

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Production of Biodiesel with Seed Soybean and Supercritical Ethanol

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Journal of Sustainable Bioenergy Systems 2014年第2期4卷 128-135页

作者： Gabriel Cassemiro Mariano Toni Jefferson Lopes Rafael Dias Marintho Bastos Quadri Ariovaldo Bolzan Laboratory of Process Control(LCP) Chemical EngineeringFederal University of Santa Catarina(UFSC)FlorianopolisBrasil Federal University of Rio Grande(FURG) Campus Santo Antonio da Patrulha(SAP)Rio Grande do SulBrasil

This paper presents a study of biodiesel production by a non-catalytical process. The innovation in this study is the use of novel materials for production: seed soybean (Glycine Max) “in natura” and ethanol in a supercritical state. To conduct the experiments, a bench reactor with a capacity of 150 mL, resistant to pressure of up to 300 bar and temperature of 350°C was developed. The fractional factorial experimental design () was used to evaluate the temperature, seed granulometry, molar ratio ethanol/oil and water percent of the mixture. The best yield observed was that of 94.07%, 10 minutes after the reactor entered a supercritical condition. Significant effects on seed granulometry, molar ratio ethanol, oil and temperature were verified. From the proposed process, biodiesel and toasted soybean seed were obtained. To purify the biodiesel sample it was necessary to use ultra-centrifugation to separate seed particles, and rotoevaporation to separate the fatty acid ethyl ester and unreacted ethanol. The chemical analyses were conducted directly by gas chromatography. The yield was calculated in accordance with concentrations obtained in the chromatographic analysis and seed mass of the experiment. Also checked was the presence of palmitate esters, stearate, oleate, linoleate and linolenate. By analyzing the ester composition it was possible to assess whether a good quality biodiesel was available. The roasted soybean seeds obtained after the reaction showed a calorific potential of 2203.17 kcal/kg and also be used as fuel.

关键词： Supercritical Biodiesel Non-Catalytic Transesterification ethyl ester Soybean Seed

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