Commercial catalysts screening for the direct amination of cyclohexanol

• Tipo: Artigo em Revista Científica Internacional
• Data: 2021

Autores

Luis Madeira (Autor) FEUP; Rui Churro (Autor) Outra; Fernando Mendes (Autor) Outra; Paulo Araújo (Autor) Outra; Filipa Ribeiro (Autor) Outra

Revista

Título: Journal of Industrial and Engineering Chemistry

Vol. 95 Nº 25

Páginas: 190-202

ISSN: 1226-086X

Editora: Korean Society of Industrial Engineering Chemistry

Indexação

ISI Web of Knowledge - 0 Citações

ISI Web of Science

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-00T-A8E

DOI: 10.1016/j.jiec.2020.12.019

Abstract (EN): Two groups of commercially available Niand Pd-based catalysts were used for the direct amination of cyclohexanol (CHOL) with NH3 as aminating agent and in the presence of H-2, aiming the selective production of cyclohexylamine (CHA) and aniline. The fresh catalysts were characterized in terms of metal loading, support composition (prevailing SiO2 and Al2O3) and metallic dispersion. Ni-based catalysts revealed to be highly active while Pd-based were more selective towards aniline, however requiring higher temperatures and catalyst loading to reach significant CHOL conversions (from 17 up to 67 %). The activity of the catalysts is intrinsically related to their metallic dispersion regardless the metal loading. The Ni-based catalyst with 46 wt. % of Ni is the most promising once it presents higher turnover frequency (TOF) values, as 10 fold high, particularly related to the ratio of desired to undesired byproducts. Moreover, operating conditions considerably affect catalysts' performance.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13