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Master's Dissertation
DOI
https://doi.org/10.11606/D.85.2022.tde-10112022-154045
Document
Author
Full name
Ulisses Brandao
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2022
Supervisor
Committee
Spinacé, Estevam Vitorio (President)
Justo Filho, João Francisco
Oliveira, Alexandre Maniçoba de
Title in Portuguese
Projeto e construção de um sistema simplificado de aquecimento por micro-ondas para reações heterogêneas gás-sólido em alta temperatura
Keywords in Portuguese
catálise heterogênea
cavidade ressonante
forno de micro-ondas
metano
Abstract in Portuguese
O presente trabalho consistiu no projeto e construção de um sistema simplificado de aquecimento por micro-ondas, destinado à avaliação de catalisadores suportados em materiais que sejam estáveis em temperaturas de 400 a 1.100 ºC e que sejam conversores desta radiação, na frequência de 2,45 GHz, em calor. Tais catalisadores são particularmente interessantes no processo de oligomerização de metano, que requer alta temperatura para sua funcionalização. A sua construção teve como base os modelos encontrados na literatura científica e simulações de funcionamento feitas em computador. Os ajustes e alterações foram feitos a partir dos testes realizados com vários materiais utilizados como suporte para catalisadores. Ao final chegou-se a uma configuração de equipamento cujos testes demonstraram que ele atende satisfatoriamente a seu propósito, tendo possibilitado a avaliação das propriedades de absorção e conversão de micro-ondas em calor de vários materiais, de forma controlada, em toda faixa de temperatura para o qual foi projetado.
Title in English
Design and construction of a simplified microwave heating system for high temperature heterogeneous gas-solid reactions
Keywords in English
heterogeneous catalysis
methane
microwave furnace
resonant cavity
Abstract in English
This work consisted in the design and construction of a simplified microwave heating system, intended to evaluate catalysts supported on stable materials at temperatures from 400 to 1,100 ºC and that convert radiation at 2.45 GHz into heat. Such catalysts are particularly interesting in the methane oligomerization process, which requires high temperature for its functionalization. Its construction was based on models found in the scientific literature and on computer simulations. Adjustments and changes were made from the results of tests carried out with various materials used as support for catalysts. In the end, a configuration of the equipment was obtained, whose tests showed that it meets satisfactorily its purpose, making it possible to evaluate the properties of absorption and conversion of microwaves into heat of several materials, in a controlled way, througout entire temperature range for which it was designed.
 
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Publishing Date
2022-11-10
 
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