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Promoter Effects on Iron–Silica Fischer–Tropsch Nanocatalysts: Conversion of Carbon Dioxide to Lower Olefins and Hydrocarbons at Atmospheric Pressure
Author(s) -
Owen Rhodri E.,
O'Byrne Justin P.,
Mattia Davide,
Plucinski Pawel,
Pascu Sofia I.,
Jones Matthew D.
Publication year - 2013
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201300263
Subject(s) - fischer–tropsch process , selectivity , catalysis , nanomaterial based catalyst , atmospheric pressure , x ray photoelectron spectroscopy , chemistry , palladium , inorganic chemistry , indium , hydrocarbon , carbon dioxide , chemical engineering , carbon monoxide , materials science , organic chemistry , oceanography , engineering , geology
If CO 2 hydrogenation is to become a viable process for the utilisation of CO 2 , improved catalysts are urgently needed. We report the promotional effects of Group 11 and 13 metals on the performance of iron–silica catalyst systems under atmospheric pressure. The addition of low loadings of gold resulted in a significant improvement in catalyst performance both in terms of conversion and selectivity to lower (C 2 –C 4 ) olefins. Small loadings of indium proved highly effective for increasing CO 2 conversion, whereas at higher loadings the selectivity to lower olefins could be dramatically increased. Catalysis tests involving palladium‐promoted systems also proved successful with large increases in selectivity towards C 5+ hydrocarbons observed. The catalysts were characterised by X‐ray photoelectron spectroscopy, TEM and SEM, which confirmed the nanostructured nature of the catalytic species involved.