Influence of alumina crystal size on the hydrotreating activity of supported NiMo catalysts using real feedstock

• Published in: Petroleum science and technology Vol. 24; no. 5-6; pp. 485 - 506
• Main Authors: DOMINGUEZ-CRESPO, M. A, DIAZ-GARCIA, L, CORTEZ DE LA PAZ, M. T, ZARATE-RAMOS, R, SANTES, V, PEREZ L, G, ARCE-ESTRADA, E. M, TORRES-HUERTA, A. M
• Format: Journal Article
• Language: English
• Published: Colchester Taylor & Francis 01.04.2006
• Subjects: Applied sciences; Crude oil, natural gas and petroleum products; Energy; Exact sciences and technology; Fuels; Petroleum products, gas and fuels. Motor fuels, lubricants and asphalts; Processing of crude oil and oils from shales and tar sands. Processes. Equipment. Refinery and treatment units; Pilot plant; Desulfurization; hydrodesulfurization (HDS); Hydrotreating; NiMoS particles; Hydrogen; Acidity; Nitrogen; X ray diffraction; Hydrogenation; Supported catalyst; Gas oil; Infrared spectrometry; Transmission electron microscopy; Pyridine; Hydrodenitrogenation; γ-alumina crystal size; Rate constant; Alumina; Hydrodesulfurization; Catalyst support
• ISSN: 1091-6466; 1532-2459
• DOI: 10.1081/LFT-200044335

Three different alumina substrates having different crystal sizes were used as supports for NiMoSx catalysts. The supports were analyzed by XRD, pyridine FTIR-TPD, and nitrogen physisorption in order to determine their crystal size, surface acidity, and textural properties, respectively. After the NiMo was loaded on the gamma-Al2O3 supports, the metallic particles were characterized during the preparation steps (annealing and sulfidation) using transmission electron microscopy (TEM). Hydrogen TPR studies of the NiMo catalysts were carried out to correlate their hydrogenating properties and their catalytic functionality, such as hydrodesulfurization (HDS), hydrodenitrogenation (HDN), and aromatic hydrogenation (HDA) using Mexican gas oil (LGO).