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.

中文翻译：

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钠钾改性Zn-Mg(Zr)Si氧化物体系对乙醇制1,3-丁二烯催化性能的影响

研究了在乙醇制取1,3-丁二烯过程中碱金属离子（Na ⁺或K ⁺）对Zn-Mg(Zr)Si氧化物体系酸碱和催化性能的影响。发现 Zn-MgSi 氧化物体系的改性通过减少副产物形成位点的数量来促进 1,3-丁二烯选择性（在温度≥670 K 时）的增加。在 Zn-ZrSi 氧化物体系的组成中，碱金属阳离子添加剂导致乙烯和乙醚选择性降低，这是由于在乙醇脱水反应中具有活性的强酸位点的含量降低。