Centro de Tecnologia
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Article Characterization of retorted shale for use in heavy metal removal(Elsevier, 2010-04) Melo, Marcus Antônio de Freitas; Pimentel, Patrícia Mendonça; Oliveira, Rosane Maria Pessoa Betânio; Melo, Dulce Maria de Araújo; Anjos, Marcelino José dos; González, GasparArticle Prediction of rhamnolipid breakthrough curves on activated carbon and amberlite XAD-2 using artificial neural network and group method data handling models(Elsevier, 2015-06) Souza, Domingos Fabiano de Santana; Padilha, Carlos Eduardo de Araújo; Padilha, Carlos Alberto de Araújo; Oliveira, Jackson Araújo de; Macedo, Gorete Ribeiro de; Santos, Everaldo Silvino dosArticle Recurrent neural network modeling applied to expanded bed adsorption chromatography of chitosanases produced by Paenibacillus ehimensis(Elsevier, 2017-01) Souza, Domingos Fabiano de Santana; Padilha, Carlos Eduardo de Araújo; Padilha, Carlos Alberto de Araújo; Oliveira, Jackson Araújo de; Macedo, Gorete Ribeiro de; Santos, Everaldo Silvino dosArticle Adsorption of nonionic surfactants in sandstones(ELSEVIER, 2007-02-01) Curbelo, Fabiola Dias da Silva; Santanna, Vanessa Cristina; Barros Neto, Eduardo Lins de; Dutra Júnior, Tarcílio Viana; Dantas, Tereza Neuma de Castro; Dantas Neto, Afonso Avelino; Garnica, Alfredo I.C.Adsorption of surfactants from aqueous solutions in porous media is very important in enhanced oil recovery (EOR) of oil reservoirs because surfactant loss due to adsorption on the reservoir rocks impairs the effectiveness of the chemical slurry injected to reduce the oil–water interfacial tension (IFT) and renders the process economically unfeasible. In this paper, two nonionic surfactants with different ethoxylation degrees were studied, ENP95 with ethoxylation degree 9.5 and ENP150 with ethoxylation degree 15. The experiments were carried out in a surfactant flooding apparatus, with a pressure gradient of 30 psi. The concentration of the injected solutions were 30% above the critical micelle concentration, to assure micelle formation. The results from the flow experiments of surfactant solutions in porous media showed that the adsorption extent was higher for ENP95 than for ENP150 because the previous surfactant has a smaller ethoxylation degree, that is, a smaller polar partArticle Influence of solution pH on forming silver molybdates obtained by sonochemical method and its application for methylene blue degradation(Elsevier, 2019-06-15) Ferreira, Erik Alexander Cunha; Andrade Neto, Nivaldo Freire de; Delmonte, Maurício Roberto Bomio; Motta, Fabiana Villela daArticle Enhancing chitosan hydrolysis aiming chitooligosaccharides production by using immobilized chitosanolytic enzymes(Elsevier, 2020-09) Santos, Everaldo Silvino dos; Dantas, Júlia Maria de Medeiros; Silva, Nayara Sousa da; Padilha, Carlos Eduardo de Araújo; Araújo, Nathália Kelly de