| Texto completo | |
| Autor(es): |
Petrolini, Davi D.
;
Marcos, Francielle F. C.
;
Assaf, Jose M.
;
Assaf, Elisabete M.
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | CHEMICAL ENGINEERING JOURNAL ADVANCES; v. 7, p. 10-pg., 2021-08-15. |
| Resumo | |
(SrxLa1-x)CeO mixed oxide catalysts were prepared using the sol-gel method, with a non-ionic surfactant as a soft template for a porous structure. The use of nitrogen physisorption measurements, BJH pore size distribution curves, and SEM micrographs confirmed improvement of the porous texture of the mixed oxide catalysts, compared to catalysts synthesized by a conventional method. X-ray diffraction and Raman spectroscopy analyses demonstrated that the preparation method led to different crystalline structures in the catalysts. In the oxidative coupling of methane (OCM) reaction, use of the catalyst prepared with the soft template improved C 2 yield, C 2 selectivity, and C2H4 selectivity by approximately 65, 101, and 130%, respectively. The addition of 0.2 Sr content in the porous catalysts also provided gains of approximately 63, 46, and 85% in C 2 yield, selectivity for C 2 , and selectivity for C2H4, respectively, when compared to the Sr-free catalyst. The satisfactory performance of the catalyst with 0.2 Sr content was probably due to the improved textural properties that provided a surface composition with concentration of Ce3+ of 59.3%. Based on statistical modeling of variables such as temperature, CH4/O2 ratio, and WHSV, it was possible to obtain a C 2 yield of 16.2%, C 2 selectivity of 76.2%, and C2H4 selectivity of 50%. (AU) | |
| Processo FAPESP: | 15/06246-7 - Aplicação do conceito de biorrefinaria a estações de tratamento biológico de águas residuárias: o controle da poluição ambiental aliado à recuperação de matéria e energia |
| Beneficiário: | Marcelo Zaiat |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 19/10980-9 - Acoplamento oxidativo do metano utilizando catalisadores do tipo A2B2O7 |
| Beneficiário: | Davi Domingos Petrolini |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |