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Preparation of Nickel Phosphide Hydrodesulfurization Catalysts Assisted by Supercritical Carbon Dioxide
Author(s) -
MotosPérez Blanca,
Uzio Denis,
Aymonier Cyril
Publication year - 2015
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201500755
Subject(s) - phosphide , hydrodesulfurization , catalysis , supercritical fluid , nickel , supercritical carbon dioxide , materials science , chemical engineering , nanoparticle , inorganic chemistry , chemistry , organic chemistry , nanotechnology , metallurgy , engineering
To meet the increasing demand for clean fuels, deep hydrotreatment reactions are required, and thereby, improvement of the performance of the catalysts is highly desired. Silica‐supported nickel phosphide (Ni 2 P) nanoparticles have been reported to be efficient catalysts for hydrodesulfurization (HDS) reactions. We propose herein an innovative preparation method assisted by supercritical carbon dioxide (scCO 2 ) to produce highly active Ni 2 P nanoparticles combining small size and high reducibility. In addition, scCO 2 promotes the formation of the Ni 2 P phase with respect to the less active Ni 12 P 5 phase. Such phosphide catalysts exhibit high activity for the HDS of 4,6‐dimethyldibenzothiophene, with a rate constant up to one order of magnitude higher than that of non‐supercritical references and close to conventional alumina supported NiMoS catalyst.