Journal
THEORETICAL AND EXPERIMENTAL CHEMISTRY
Volume 57, Issue 6, Pages 443-450Publisher
SPRINGER
DOI: 10.1007/s11237-022-09714-9
Keywords
ethanol conversion; 1; 3-butadiene; ZnO; MgO(ZrO2)-SiO2; sodium; potassium; acid-base characteristics
Categories
Funding
- National Academy of Sciences of Ukraine [KPKVK 6541230 (0120U101212), 0119U101562, 0121U111813]
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This study investigates the effect of alkali metal ions (Na+ or K+) on the acid-base and catalytic properties of Zn-Mg(Zr)Si oxide systems during the production of 1,3-butadiene from ethanol. The findings show that modifying Zn-MgSi oxide systems can increase the selectivity of 1,3-butadiene (at temperatures >= 670 K) by reducing the number of by-product formation sites. In the composition of Zn-ZrSi oxide systems, the addition of alkali metal cation leads to a decrease in ethene and diethyl ether selectivity due to the reduction of strong acid sites that are active in the ethanol dehydration reaction.
The effect of alkali metal ions (Na+ or K+) on the acid-base and catalytic properties of Zn-Mg(Zr)Si oxide systems in the process of obtaining 1,3-butadiene from ethanol was studied. It was found that the modification of Zn-MgSi oxide systems promotes an increase in the 1,3-butadiene selectivity (at temperatures >= 670 K) by reducing the number of formation sites of by-products. In the composition of Zn-ZrSi oxide systems, alkali metal cation additives lead to a decrease in the ethene and diethyl ether selectivity due to a decrease in the content of strong acid sites that are active in the ethanol dehydration reaction.
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