Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-04-26T19:29:12Z No. of bitstreams: 1 AndresaJacianeCabralDeLima_DISSERT.pdf: 1971739 bytes, checksum: 742d6e447b4897c6982c80e42417ec21 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-04-28T23:20:37Z (GMT) No. of bitstreams: 1 AndresaJacianeCabralDeLima_DISSERT.pdf: 1971739 bytes, checksum: 742d6e447b4897c6982c80e42417ec21 (MD5) / Made available in DSpace on 2016-04-28T23:20:37Z (GMT). No. of bitstreams: 1 AndresaJacianeCabralDeLima_DISSERT.pdf: 1971739 bytes, checksum: 742d6e447b4897c6982c80e42417ec21 (MD5) Previous issue date: 2015-03-10 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O uso de catalisadores ? de fundamental import?ncia para ind?stria petrol?fera, tendo em vista que eles reduzem o tempo e a energia necess?rios para que uma rea??o aconte?a, melhorando a efici?ncia e a qualidade dos produtos. Em contra partida os mesmos acabam sofrendo desativa??o, que pode ser ocasionada por v?rios fatores, tais como: envenenamento dos s?tios ativos por metais, sinteriza??o e pela forma??o de coque, no qual provoca obstru??o nos poros causando assim a perda da fase ativa do material. Ap?s v?rios ciclos de uso e regenera??o, os catalisadores s?o dispostos na natureza tornando-se assim um grave problema ambiental. Diante dessa problem?tica o presente trabalho teve como objetivo desativar e regenerar ze?litas ?cidas dos tipos HZSM-5 e HY, a fim de comparar o comportamento das mesmas atrav?s das t?cnicas de: difratometria de Raios-X, Adsor??o de Desor??o de n-butilamina, An?lises Termogravim?tricas (TG/DTG) e espectroscopia na regi?o do infravermelho com transformada de Fourier. A desativa??o foi realizada em um reator de microatividade adaptado. Ap?s a rea??o foram obtidos os catalisadores desativados, e posteriormente realizada a regenera??o em um forno tipo mufla. Atrav?s das curvas termogravim?tricas de dessor??o de n-butilamina foi observado um aumento consider?vel na densidade de s?tios ?cidos m?dios da HZSM-5, provavelmente novos s?tios de adsor??o foram gerados durante a regenera??o. Observou-se tamb?m, que a ze?lita HZSM-5 apresentou cerca de 8% de coque, enquanto que a HY apresentou 18%, essa maior porcentagem se deu pelo fato da ze?lita faujasita (FAU) ser mais ?cida, e consequentemente promover mais rea??es, por tanto maior forma??o de coque. O coque formado em ambas as ze?litas tanto tiveram car?ter alif?ticos como arom?ticos. / The use of catalysts is of fundamental importance to the oil industry, given that they reduce the time and energy required for a reaction to take place, improving efficiency and product quality. In return they end up suffering deactivation, which can be caused by several factors such as: poisoning of active sites for metals, sintering and the formation of coke, which causes obstruction in the pores thus causing the loss of the active phase of the material. After several cycles of use and regeneration, the catalysts are arranged in nature thus becoming a serious environmental problem. Faced with this problem the present study aimed to disable and regenerate acidic zeolites of HZSM-5 and HY types in order to compare the behavior of the same through the techniques: Xray diffraction, adsorption of n-butyl amine Desorption, Analysis Thermogravimetric (TG / DTG) and spectroscopy in the infrared Fourier transform. Disabling was held in an adapted Micro activity reactor. After the reaction the deactivated catalysts were obtained, and then performed regeneration in a muffle furnace. Through the Thermogravimetric curves of n-butylamine desorption was observed a significant increase in the density of acid sites of HZSM-5 average probably new adsorption sites were generated during regeneration. It was also observed that the HZSM-5 zeolite showed about 8% of coke, while HY showed 18% higher this percentage was due to the fact that the zeolite faujasite (FAU) is more acidic, and thus promote further reaction, by the greater coke formation. The coke formed in both zeolites have both aliphatic as aromatic character.