CHARACTERIZATION OF COPPER-ZINC HYDROXYCARBONATE PRECURSORS

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F19%3A43918192" target="_blank" >RIV/60461373:22320/19:43918192 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22350/19:43918192 RIV/61989100:27710/19:10243261
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
CHARACTERIZATION OF COPPER-ZINC HYDROXYCARBONATE PRECURSORS
Original language description
Previously, it was found that the structure of CuZn catalyst's precursor highly affected the catalyst properties1 and activity in ester hydrogenolysis2. To enhance the properties of CuZn catalysts, it is essential to describe the effect of single-phase hydroxycarbonate precursor on catalyst properties. Three CuZn catalysts were prepared by co-precipitation targeting Cu/Zn ratio equal to 0.66, 5.0 and 1.60 to get pure aurichalcite Cu2Zn3(CO3)2(OH)6, zincian malachite (Cu0.8Zn0.2)2(OH)2CO3 and an equal mix of both phases, respectively. As-prepared catalysts were calcined at temperatures in a range of 300-450 °C. The properties of as-prepared and calcined catalysts were characterized using in situ XRD, TPR and BET methods. XRD showed that CuO crystallite size in catalysts derived from different phases was similar in a range of 3 to 8 nm depending only on the calcination temperature. However, aurichalcite-derived catalyst crystallites were more resistant to high reduction temperature. On the other hand, aurichalcite-derived catalysts had lower BET surface area and larger pore size compared to other two catalysts. Despite potential disadvantages in structural properties, aurichalcite-derived catalysts performed as highly active in ester hydrogenolysis.
Czech name
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Czech description
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Project
<a href="/en/project/GA17-05704S" target="_blank" >GA17-05704S: Investigation and optimization of promoted CuZnAl hydrogenation catalysts</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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