Selectivity enhancement for higher alcohol product in Fischer-Tropsch synthesis over nickel-substituted La<inf>0.9</inf>Sr<inf>0.1</inf>CoO<inf>3</inf> perovskite catalysts
MetadataShow full item record
© 2017 Elsevier Ltd The performance of La 0.9 Sr 0.1 Co 1-x Ni x O 3 perovskite catalysts with different Ni substitution levels was evaluated in the Fischer-Tropsch (F-T) synthesis for higher alcohol production. It was found that Ni substitution improved the catalyst's reducibility and had a positive effect on higher alcohol synthesis (HAS) from syngas. Only a limited amount of Ni ions can enter into the perovskite structure and then form Co-Ni alloy after reduction. Catalyst characterisation and activity test results indicate that the synergistic effects of the two metal species in the Co-Ni are responsible for the catalytic activity improvement. For high Ni-substituted perovskite catalysts (x = 0.5), the extra-lattice Ni segregates on the catalyst surface and promotes CO methanation during the F-T reaction. A significant deviation of methanol selectivity from the Anderson-Schulz-Flory (ASF) linear distribution was detected for catalysts containing both Ni and Co, suggesting that the alcohol formation mechanism is altered with nickel substitution in La 0.9 Sr 0.1 Co 1-x Ni x O 3 perovskite catalysts. The La 0.9 Sr 0.1 Co 0.9 Ni 0.1 O 3 perovskite catalyst exhibited the highest selectivity towards higher alcohols. The effect of reaction temperature on the catalytic activity is also discussed.
Showing items related by title, author, creator and subject.
Ao, Min; Pham, Gia Hung; Sage, Valerie; Pareek, Vishnu (2014)Fischer–Tropsch (F-T) technology is a promising candidate for the conversion of syngas to valuable synthetic fuels. Perovskite-type oxides, particularly LaCoO3 have extensively been investigated in F-T synthesis as they ...
Ao, Min (2017)This study investigated the effects of partial substitution at the A- and/or B-site of LaCoO3 perovskite catalysts (ABO3) on higher alcohol synthesis (HAS) from syngas. The catalyst properties and catalytic performances ...
Ao, Min; Pham, Gia ; Sage, V.; Pareek, Vishnu ; Liu, Shaomin (2019)© 2019 Elsevier B.V. Trimetallic Co-Ni-Cu catalyst from perovskite precursor was prepared by co-precipitation method and then examined for its ability to form higher alcohols from syngas. A superior C2+OH yield of 142.1 ...