Effect of SiO2-coating of FeK/Al2O3 catalysts on their activity and selectivity for CO2 hydrogenation to hydrocarbons

Fanshu Ding; Anfeng Zhang; Min Liu; Xinwen Guo; Chunshan Song

doi:10.1039/c3ra44485f

Effect of SiO₂-coating of FeK/Al₂O₃ catalysts on their activity and selectivity for CO₂ hydrogenation to hydrocarbons

Fanshu Ding, Anfeng Zhang, Min Liu, Xinwen Guo, Chunshan Song

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

SiO₂-coated FeK/Al₂O₃ catalysts with different silica content were prepared and examined for the synthesis of hydrocarbons from CO₂ hydrogenation. It was found that SiO ₂ coating affects both the activity for CO₂ conversion and the selectivity to higher hydrocarbons, depending on the loading level. The catalyst with 9 wt% SiO₂ coating showed both high CO₂ conversion (63%) and high selectivity toward C₂+ hydrocarbons (74%), while further higher coating led to suppression of catalyst activity. The analytical characterization of SiO₂-coated catalysts confirmed the interactions of SiO₂-Fe and SiO₂-Al₂O ₃, which largely reduced the metal-support interaction and decreased the reduction temperature of iron oxide. In addition, an increase of adsorption capacity for CO was observed with desired SiO₂ coating. It is likely that SiO₂-coating improved the catalyst hydrophobic property, thereby reducing the negative impact of water by-product and facilitating the reverse water gas shift reaction and subsequent hydrogenation towards higher CO ₂ conversion to higher hydrocarbons.

Original language	English (US)
Pages (from-to)	8930-8938
Number of pages	9
Journal	RSC Advances
Volume	4
Issue number	17
DOIs	https://doi.org/10.1039/c3ra44485f
State	Published - 2014

All Science Journal Classification (ASJC) codes

General Chemistry
General Chemical Engineering

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title = "Effect of SiO2-coating of FeK/Al2O3 catalysts on their activity and selectivity for CO2 hydrogenation to hydrocarbons",

abstract = "SiO2-coated FeK/Al2O3 catalysts with different silica content were prepared and examined for the synthesis of hydrocarbons from CO2 hydrogenation. It was found that SiO 2 coating affects both the activity for CO2 conversion and the selectivity to higher hydrocarbons, depending on the loading level. The catalyst with 9 wt% SiO2 coating showed both high CO2 conversion (63%) and high selectivity toward C2+ hydrocarbons (74%), while further higher coating led to suppression of catalyst activity. The analytical characterization of SiO2-coated catalysts confirmed the interactions of SiO2-Fe and SiO2-Al2O 3, which largely reduced the metal-support interaction and decreased the reduction temperature of iron oxide. In addition, an increase of adsorption capacity for CO was observed with desired SiO2 coating. It is likely that SiO2-coating improved the catalyst hydrophobic property, thereby reducing the negative impact of water by-product and facilitating the reverse water gas shift reaction and subsequent hydrogenation towards higher CO 2 conversion to higher hydrocarbons.",

author = "Fanshu Ding and Anfeng Zhang and Min Liu and Xinwen Guo and Chunshan Song",

year = "2014",

doi = "10.1039/c3ra44485f",

language = "English (US)",

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journal = "RSC Advances",

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publisher = "Royal Society of Chemistry",

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T1 - Effect of SiO2-coating of FeK/Al2O3 catalysts on their activity and selectivity for CO2 hydrogenation to hydrocarbons

AU - Ding, Fanshu

AU - Zhang, Anfeng

AU - Liu, Min

AU - Guo, Xinwen

AU - Song, Chunshan

PY - 2014

Y1 - 2014

N2 - SiO2-coated FeK/Al2O3 catalysts with different silica content were prepared and examined for the synthesis of hydrocarbons from CO2 hydrogenation. It was found that SiO 2 coating affects both the activity for CO2 conversion and the selectivity to higher hydrocarbons, depending on the loading level. The catalyst with 9 wt% SiO2 coating showed both high CO2 conversion (63%) and high selectivity toward C2+ hydrocarbons (74%), while further higher coating led to suppression of catalyst activity. The analytical characterization of SiO2-coated catalysts confirmed the interactions of SiO2-Fe and SiO2-Al2O 3, which largely reduced the metal-support interaction and decreased the reduction temperature of iron oxide. In addition, an increase of adsorption capacity for CO was observed with desired SiO2 coating. It is likely that SiO2-coating improved the catalyst hydrophobic property, thereby reducing the negative impact of water by-product and facilitating the reverse water gas shift reaction and subsequent hydrogenation towards higher CO 2 conversion to higher hydrocarbons.

AB - SiO2-coated FeK/Al2O3 catalysts with different silica content were prepared and examined for the synthesis of hydrocarbons from CO2 hydrogenation. It was found that SiO 2 coating affects both the activity for CO2 conversion and the selectivity to higher hydrocarbons, depending on the loading level. The catalyst with 9 wt% SiO2 coating showed both high CO2 conversion (63%) and high selectivity toward C2+ hydrocarbons (74%), while further higher coating led to suppression of catalyst activity. The analytical characterization of SiO2-coated catalysts confirmed the interactions of SiO2-Fe and SiO2-Al2O 3, which largely reduced the metal-support interaction and decreased the reduction temperature of iron oxide. In addition, an increase of adsorption capacity for CO was observed with desired SiO2 coating. It is likely that SiO2-coating improved the catalyst hydrophobic property, thereby reducing the negative impact of water by-product and facilitating the reverse water gas shift reaction and subsequent hydrogenation towards higher CO 2 conversion to higher hydrocarbons.

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DO - 10.1039/c3ra44485f

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Effect of SiO₂-coating of FeK/Al₂O₃ catalysts on their activity and selectivity for CO₂ hydrogenation to hydrocarbons

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