Abstract
The effect of Cu on cobalt/titania nanorod (Co/TNR) catalysts for the promotion of carbon monoxide (CO) hydrogenation to hydrocarbons was investigated. Varying amounts of Cu (1.5–6.0 wt%) were loaded onto the base Co/TNR catalyst using the deposition–precipitation method. Characterization by X-ray diffraction (XRD) revealed that the Cu particles were well dispersed over the Co/TNR catalysts. Characterizations by temperature-programmed desorption of hydrogen (H2-TPD) and carbon monoxide (CO-TPD) and temperature-programmed reduction in hydrogen (H2-TPR) proved the effect of the Cu promoter in the Co/TNR catalyst by its bimetal effect with Co, where the Co/TNR catalysts containing Cu generally showed a significant improvement in comparison with the base Co/TNR catalyst not containing the Cu promoter. The CO and H2 adsorption capacities and reducibility were optimal on the catalyst containing 1.5% Cu (1.5Cu-Co/TNR). This aligns well with the catalytic activity performance of all the catalysts, where the 1.5Cu-Co/TNR catalyst exhibited the best performance, yielding 16.8% CO conversion and 57.7% C5+ hydrocarbon selectivity at 240 ℃ and 5 bar.
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Acknowledgements
The authors would like to thank the financial support from the Ministry of Business, Innovation & Employment in New Zealand under the MBIE Endeavour “Smart Ideas” grant (UOCX1905) and the China Scholarship Council (CSC). This work was also supported by the publication scholarship offered by the College of Engineering at the University of Canterbury.
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Khan, W.U., Li, X., Baharudin, L. et al. Copper-Promoted Cobalt/Titania Nanorod Catalyst for CO Hydrogenation to Hydrocarbons. Catal Lett 151, 2492–2501 (2021). https://doi.org/10.1007/s10562-020-03506-3
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DOI: https://doi.org/10.1007/s10562-020-03506-3