A toda minha família, em especial, ao meu marido, Renato, aos meus pais, a minha avó Lizah e minha irmã Raquel pelo apoio e amor, incondicionais, em todos os momentos da minha vida. Ao Prof. Dr. Roberto Guardani pela orientação e atenção dispensada ao longo desse trabalho. Ao Prof. Dr. Antônio Carlos Silva Costa Teixeira pelos ensinamentos e coorientação do trabalho. À Dra. Maria Anita Mendes pela orientação em HPLC Aos colegas de laboratório do grupo de fotoquímica: Katia, Juliana, Cintia, Leidi e Fernando. Ao colega Uirá que me auxiliou na caracterização do reator. Aos colegas William e Thales pela ajuda com a modelagem. Aos colegas do Semi-Industrial pela amizade. À CAPES pelo suporte financeiro que possibilitou a realização desse trabalho.

The concentration profiles of species involved in the degradation of phenol by an advanced oxidation process (AOP) are modeled by a computational fluid dynamics tool in an annular reactor whose fluid dynamics was the object of a previous study. The reactive flow was fully described together with the radiation field and the kinetic model, which encompasses large kinetic constants such as 1010 L mol−1s−1. Phenol degradation can be simulated by using relaxation factors of at least 1012 kg m−3s−1. The hydroxyl radical concentration profile depends on the radiation field, assessed by the discrete ordinate and the discrete transfer methods. Phenol can be completely degraded along the reactor. A centrifugal effect was observed, with higher concentrations of degradation products along the inner wall at the reactor outlet.

Recebido em 3/7/12; aceito em 19/12/12; publicado na web em 21/3/13 COMPARATIVE STUDY OF ESCHKA, INFRARED, THERMAL CONDUCTIVITY (TCD) AND ULTRAVIOLET METHODS OF TOTAL SULPHUR DETERMINATION IN SOLID FUELS. The oxidation of sulphur compounds upon burning emits large quantities of SOx into the atmosphere. Therefore, there is growing interest in fast and accurate methods for analyzing sulphur content in fuels. The objective of this work was to compare four different methods of total sulphur determination in solid fuels. The methods used in this work were Eschka, Infrared, Thermal Conductivity Detection (TCD) and Ultraviolet Fluorescence Detection (UV). The preliminary results showed that TCD and UV methods (nonstandard methods for solid fuels) have similar precision to the infrared method (standard method) for high-sulphur coal samples.

Artigo técnicoPredição da octanagem de gasolina utilizando técnica rápida e não destrutiva.

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