On Stability of High-Surface-Area Al2O3, TiO2, SiO2-Al2O3, and Activated Carbon Supports during Preparation of NiMo Sulfide Catalysts for Parallel Deoxygenation of Octanoic Acid and Hydrodesulfurization of 1-Benzothiophene

0565130 - ÚCHP 2023 RIV CH eng J - Journal Article
Kaluža, Luděk - Soukup, Karel - Koštejn, Martin - Karban, Jindřich - Palcheva, R. - Laube, Marek - Gulková, Daniela
On Stability of High-Surface-Area Al2O3, TiO2, SiO2-Al2O3, and Activated Carbon Supports during Preparation of NiMo Sulfide Catalysts for Parallel Deoxygenation of Octanoic Acid and Hydrodesulfurization of 1-Benzothiophene.
Catalysts. Roč. 12, č. 12 (2022), č. článku 1559. E-ISSN 2073-4344
R&D Projects: GA TA ČR TN01000048; GA ČR GA17-22490S
Grant - others:AV ČR(CZ) BAS-20-01
Program: Bilaterální spolupráce
Institutional support: RVO:67985858
Keywords : deoxygenation * hydrodesulfurization * NiMo catalyst
OECD category: Chemical process engineering
Impact factor: 3.9, year: 2022
Method of publishing: Open access
https://www.mdpi.com/2073-4344/12/12/1559

NiMo sulfide catalysts were prepared by the impregnation of high surface area supports with an aqueous solution made of NiCO3 2Ni(OH)2, MoO3 and citric acid, followed by freeze drying and sulfidation in H2S/H2 mixture. N2 physisorption and X-ray diffraction were selected to investigate the amphoteric oxides Al2O3 and TiO2, acidic SiO2-Al2O3 and activated carbon supports, fresh prepared sulfide NiMo catalysts and spent catalysts after model parallel reaction of octanoic acid deoxygenation and 1-benzothiophene hydrodesulfurization. The studied mesoporous amphoteric oxides Al2O3 and TiO2 did not lead to highly active NiMo catalysts due to the low hydrothermal stability of these supports during the preparation of the active sulfide phase and deoxygenation reaction. The most active catalyst based on oxidic support was the NiMo sulfide supported on acidic mesoporous SiO2-Al2O3, which was explained by the increased stability of this support to the water and CO/CO2 mixture during the activation of the sulfidic phase and deoxygenation reaction. The extraordinarily high stability of the activated carbon support led to outstanding activities of the sulfidic NiMo/C catalyst.
Permanent Link: https://hdl.handle.net/11104/0336660