The vapour extraction process, or &amp / #8216 / VAPEX&amp / #8217 / has attracted a great deal of attention in recent years as a new method of heavy oil or bitumen recovery. The VAPEX (vapour extraction) can be visualized as energy efficient recovery process for unlocking the potential of high viscosity resources trapped in bituminous and heavy oil reservoirs. A total of 20 VAPEX experiments performed with Hele-Shaw cell utilizing three different Turkish crude oils. Two different VAPEX solvents (propane and butane) were used with three different injection rates (20, 40 and 80 ml/min). Garzan, Raman and Bati Raman crude oils were used as light, medium and heavy oil. Apart from normal Dry VAPEX experiments one experiment was conducted with CO2 and another one with butane + steam as Wet VAPEX experiment. All experiments were recorded by normal video camera in order to analyze visually also. For both VAPEX solvents, oil production rates increased with injection rates for all crude oils. Instantaneous asphaltene rate for Garzan oil, showed fluctuated performance with propane solvent. Butane showed almost constant degree of asphaltene precipitation. Instantaneous asphaltene rate for Raman and Bati Raman oils gave straight line results with the injection rate of 20 ml/min for both solvent. When the injection rate increased graphs showed the same performance with Garzan oil and started to fluctuate for both solvent. For asphaltene precipitation, propane gave better results than butane in almost all injection rates for Garzan and Raman oil. In the experiments with Bati Raman oil, butane made better upgrading than propane with the injection rate 80 ml/min. With the other two rates, both solvents showed almost same performace.

Submitted by Emanuel Varela Cardoso (emanuel.varela@ufcg.edu.br) on 2018-08-22T19:06:14Z No. of bitstreams: 1 DÉBORA RAFAELLY SOARES SILVA – DISSERTAÇÃO (PPGEP) 2015.pdf: 2746746 bytes, checksum: 81737093cb2d8efce111d7e4dc007773 (MD5) / Made available in DSpace on 2018-08-22T19:06:14Z (GMT). No. of bitstreams: 1 DÉBORA RAFAELLY SOARES SILVA – DISSERTAÇÃO (PPGEP) 2015.pdf: 2746746 bytes, checksum: 81737093cb2d8efce111d7e4dc007773 (MD5) Previous issue date: 2015-08 / Capes / O gergelim é uma cultura bastante adaptada às condições edafoclimáticas do Nordeste, configurando-se como um excelente potencial econômico para esta região, entretanto, as sementes perdem rapidamente a viabilidade quando manipuladas e armazenadas sem os devidos cuidados, sendo necessário o uso de técnicas que preservem a qualidade dessas sementes ao longo do armazenamento. Assim, objetivou-se com este trabalho determinar as propriedades físicas, bem como, o estudo da cinética de secagem desta oleaginosa quando submetida às temperaturas de 30, 35, 40 e 45°C aplicando diferentes modelos matemáticos aos dados observados, além de obter as propriedades termodinâmicas durante a secagem. As sementes de gergelim cultivar BRS Seda foram caracterizadas fisicamente quanto a sua forma, tamanho, volume, área superficial, massa especifica, circularidade, esfericidade e a massa de 1000 sementes. As sementes foram submetidas à secagem em um secador de leito fixo, nas temperaturas de 30, 35, 40 e 45 °C. Os dados experimentais de secagem das sementes de gergelim em camada fina foram ajustados às equações de Page, Henderson e Pabis, Lewis, Cavalcanti Mata, Thompson e Midilli. Com base nos resultados obtidos para o ângulo de repouso das sementes de gergelim, pode-se afirmar que esta cultivar apresenta uma boa fluidez, favorecendo o processamento deste produto. Com relação à massa de mil sementes, verifica-se que a cultivar avaliada atende satisfatoriamente aos padrões exigidos pelo mercado. A melhor predição ao processo de cinética de secagem foi obtida pelo modelo de Cavalcanti Mata. O aumento da temperatura do ar de secagem promoveu o aumento da difusividade das sementes e da energia livre de Gibbs e reduziu os valores das propriedades de entalpia e entropia. / Sesame is a crop very adapted to the edaphoclimatic conditions of the Northeast, constituting as an excellent economic potential for this region, however, the seeds lose the viability quickly when manipulated and stored without the proper care, being necessary the use of techniques that preserve the quality of these seeds throughout the storage. The objective of this study was to determine the physical properties and the drying kinetics of this oil when subjected to temperatures of 30, 35, 40 and 45° C, applying different mathematical models to the observed data. thermodynamic properties during drying. Silage BRS sesame seeds were physically characterized as to their shape, size, volume, surface area, specific mass, circularity, sphericity and the mass of 1000 seeds. The seeds were dried in a fixed bed dryer at temperatures of 30, 35, 40 and 45°C. Experimental drying data of the thin layer sesame seeds were adjusted to the equations of Page, Henderson and Pabis, Lewis, Cavalcanti Mata, Thompson and Midilli. Based on the results obtained for the angle of repose of the sesame seeds, it can be stated that this cultivar presents an excellent flowability, favoring the processing of this product. With respect to the mass of one thousand seeds, it is verified that the evaluated cultivar satisfies to the standards demanded by the market. The best prediction to the drying kinetic process was obtained by Cavalcanti Mata model. Increasing drying air temperature promoted increased seed diffusivity and Gibbs free energy and reduced enthalpy and entropy values.