Conversão fotocatalítica de metano em metanol: desenvolvimento do equipamento e experimentos
Due to increasing awareness regarding the environment, some gases such as methane have been extensively studied in order to have their usage optimized, aiming to reduce environmental impacts and the discovery of more noble applications. Given this context, photocatalysis emerges as an alternative...
Na minha lista:
| Autor principal: | |
|---|---|
| Outros Autores: | |
| Formato: | Dissertação |
| Idioma: | pt_BR |
| Publicado em: |
Brasil
|
| Assuntos: | |
| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/26834 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| Resumo: | Due to increasing awareness regarding the environment, some gases such as
methane have been extensively studied in order to have their usage optimized, aiming to
reduce environmental impacts and the discovery of more noble applications. Given this
context, photocatalysis emerges as an alternative for the conversion of methane into products
with higher added value. The method of obtaining methanol from methane has several
advantages, since methanol not only has a methane-like amount of energy, but also is easily
transported and stored. This work searches for a viable alternative for the photocatalytic
production of methanol from methane vapor reform, the development of a new system, as
well as the evaluation of its operation and conversion efficiency. The system consists of a
humidification column, an annular photocatalytic reactor, stainless steel screens coated with
titanium dioxide, zinc oxide or tungsten trioxide and a condenser. The photocatalysts,
deposited on the screens through the method that had been adapted from Merajin et al (2018),
were activated with the aid of UV-A and UV-C emission lamps, arranged inside the reactor
at different times. Oxides and supports were analyzed by scanning electron microscopy
(SEM), X-ray diffraction (XRD) and diffuse reflectance spectroscopy (ERD) techniques, for
evaluation of the homogeneity of the coatings and to ensure that the photocatalysts meet the
process requirements. The photocatalytic tests were conducted at ambient pressure and
temperature. As a result of the depositions, through the SEM images, it is possible to observe
that the photocatalysts presented an excellent distribution, confirming the adequacy of the
technique used in relation to the purposes of the study. Although the system was operational,
the products of the process, analyzed by gas and liquid chromatography, did not show any
evidence of conversion under the experimental conditions. |
|---|