Continuous supercritical synthesis of unsupported and high specific surface area catalyst precursors for deep-hydrodesulfurization

Manuel Théodet (1, 2) , Cyril Quilfen (2) , Cristina Martínez (1) , Cyril Aymonier (2)

1 ITQ - Instituto de Tecnología Química
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

Unsupported and high specific surface area (SBET) catalyst precursors for deep-hydrodesulfurization (deep-HDS) are obtained using an environmental friendly, continuous and fast synthesis process in supercritical water/alcohol mixtures. This approach offers an access to high production rate and upscaling. Two mixed oxides were synthesized: NiMoO4, which is the preferred material when deep-HDS is investigated, and CoMoO4 preferred for simple HDS. The role of the water/alcohol mixture on the resulting specific surface area has been studied and allows a controlled adjustment of the resulting specific surface area. The obtained NiMoO4 material consists of the highly active hydrate NiMoO4.0.75H2O phase with a controlled composition and specific surface area up to 200 m2 g−1. Resulting materials have shown great performances when tested in deep-HDS catalytic tests.

Mots clés: Sustainable manufacturing; Green materials; Materials chemistry; Catalysis

Domaines: Matériaux; Catalyse

Manuel Théodet, Cyril Quilfen, Cristina Martínez, Cyril Aymonier. Continuous supercritical synthesis of unsupported and high specific surface area catalyst precursors for deep-hydrodesulfurization. Journal of Supercritical Fluids, 2016, 117, pp.252-259. ⟨10.1016/j.supflu.2016.07.002⟩. ⟨hal-03113987⟩