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Catalytic Conversion of SO 2 Released from the Roasting Process of Copper Sulfides to SO 3 by New Nanocatalysts of Vanadium(V) Oxide
Author(s) -
Assefi Mohammad,
Torabi Masoumeh,
Sajadi Ali
Publication year - 2017
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201600211
Subject(s) - nanomaterial based catalyst , chemistry , catalysis , vanadium , thermogravimetry , inorganic chemistry , nuclear chemistry , sulfate , organic chemistry
Two new silica‐supported vanadium(V) oxide nanocatalysts were synthesized from vanadyl( IV ) sulfate and vanadyl( IV ) oxalate by the sol–gel method. The nanocatalysts were characterized by Fourier transform infrared spectroscopy, thermogravimetry, X‐ray diffraction, X‐ray fluorescence, and field‐emission scanning electron microscopy. The average diameter of the nanocatalysts was ~16 nm. The catalytic activity of both nanocatalysts was investigated in the oxidation of sulfur dioxide ( SO 2 ) released from the roasting of copper sulfides to sulfur trioxide ( SO 3 ), and the results were compared with those obtained from a commercial BASF (Baden Aniline and Soda Factory) catalyst. It is worth mentioning that our nanocatalysts show higher activity than the commercial catalyst for the oxidation of SO 2 to SO 3 under similar reaction conditions. The suggested electrocatalytic mechanism for the oxidation of SO 2 to SO 3 was confirmed by computational studies. Our calculations indicate that the terminal VO bond of V 2 O 5 is likely the most active site for the adsorption and oxidation of SO 2 .