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Direct synthesis of Fe-aluminosilicates from red mud for catalytic deoxygenation of waste cooking oil

Conversion of red mud (RM) that contains a high level of silica, alumina and iron minerals into heterogenous catalysts, offers a route for the utilization of abundant toxic by-products of bauxite refining. In this study, the conversion of red mud into mesoporous Fe-aluminosilicate produced selective...

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Detalles Bibliográficos
Autores principales: Ramdhani, Eka Putra, Santoso, Eko, Holilah, Holilah, Nugraha, Reva Edra, Bahruji, Hasliza, Suprapto, Suprapto, Jalil, Aishah Abdul, Asikin-Mijan, Nurul, Akhlus, Syafsir, Prasetyoko, Didik
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10617586/
https://www.ncbi.nlm.nih.gov/pubmed/37915446
http://dx.doi.org/10.1039/d3ra05910c
Descripción
Sumario:Conversion of red mud (RM) that contains a high level of silica, alumina and iron minerals into heterogenous catalysts, offers a route for the utilization of abundant toxic by-products of bauxite refining. In this study, the conversion of red mud into mesoporous Fe-aluminosilicate produced selective catalysts for the deoxygenation of waste cooking oil to green diesel hydrocarbons. Direct conversion of red mud in the presence cetyltrimethylammonium bromide into Fe-aluminosilicate (RM-CTA) produced a highly mesoporous structure with oligomeric Fe(2)O(3) clusters within the pores. When red mud was treated with citric acid (RM-CA-CTA), a wide distribution of Fe(2)O(3) particles was obtained on the aluminosilicate external surface. TEM analysis showed a well-defined hexagonal mesoporosity of Fe-aluminosilicate obtained from untreated red mud, while the treated red mud produced lower regularity mesopores. RM-CTA exhibits 60% WCO conversion and 83.72% selectivity towards liquid products with 80.44% diesel hydrocarbon (C(11)–C(18)) yield. The high selectivity was due to the high acidity of Fe-aluminosilicate to dissociate the C–O bond and the regularity of mesostructure for efficient hydrocarbon diffusion, preventing a cracking reaction.