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Influence of modifier (Mn, La, Ce, Zr and Y) on the performance of Cu/Zn/Al catalysts via hydrotalcite-like precursors for CO2 hydrogenation to methanol

Paper ID Volume ID Publish Year Pages File Format Full-Text
40278 45848 2013 11 PDF Available
Title
Influence of modifier (Mn, La, Ce, Zr and Y) on the performance of Cu/Zn/Al catalysts via hydrotalcite-like precursors for CO2 hydrogenation to methanol
Abstract

•The introduction of Mn, La, Ce, Zr and Y favors the production of methanol.•The Y-modified catalyst possesses extremely high exposed Cu surface area.•The Zr-modified catalyst possesses the highest fraction of strongly basic sites.•The CO2 conversion depends on the exposed Cu surface area.•The methanol selectivity is related to the distribution of basic sites of catalyst.

A series of promoted Cu/Zn/Al catalysts derived from hydrotalcite-like precursors were synthesized by co-precipitation method and tested for the CO2 hydrogenation to methanol. The influence of modifier (Mn, La, Ce, Zr and Y) on the physicochemical properties of Cu/Zn/Al catalysts was studied in detail. The results show that the BET specific surface area, Cu surface area and Cu dispersion increase in the order of Cu/Zn/Al < Cu/Zn/Al/Mn < Cu/Zn/Al/La < Cu/Zn/Al/Ce < Cu/Zn/Al/Zr < Cu/Zn/Al/Y. The similar trend can be observed for the total number of basic sites, while the Zr-modified Cu/Zn/Al catalyst exhibits the highest density and proportion of strongly basic sites. It is also found that the CO2 conversion depends on the exposed Cu surface area and the CH3OH selectivity increases linearly with the increase of proportion of strongly basic sites to the total basic sites. The introduction of Mn, La, Ce, Zr and Y favors the production of methanol and the Y- and Zr-modified Cu/Zn/Al catalysts exhibit the highest CO2 conversion and CH3OH selectivity, respectively.

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Keywords
Hydrotalcite-like structure; Influence of modifier; CO2 hydrogenation; Methanol synthesis; Cu/Zn/Al catalyst
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Influence of modifier (Mn, La, Ce, Zr and Y) on the performance of Cu/Zn/Al catalysts via hydrotalcite-like precursors for CO2 hydrogenation to methanol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 468, 5 November 2013, Pages 442–452
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
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