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首页> 外文期刊>Reaction kinetics,mechanisms and catalysis >Catalytic activity of Cu-Zn-Al-Mn admixed with gamma-alumina for the synthesis of DME from syngas: manganese effect or just method of preparation?
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Catalytic activity of Cu-Zn-Al-Mn admixed with gamma-alumina for the synthesis of DME from syngas: manganese effect or just method of preparation?

机译：铜-锌-铝-锰与γ-氧化铝混合的催化活性从合成气合成二甲醚：锰效应还是只是制备方法？

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摘要

A series of methanol synthesis catalysts, CuO/ZnO/Al2O3 and CuO/ ZnO/Al2O3 containing 5 mol% of manganese physically admixed with γ-Al2O3 were tested for the direct synthesis of dimethyl ether from syngas. The catalysts were prepared by coprecipitation of the metal nitrates with several types of alkali carbonate solution. Aqueous solutions of Na2CO3, NaHCO3/Na2CO3 buffer, and NaHCO3 were used as the precipitating agents to investigate the effects of the preparation method on the microstructure of the precursors and on the physico-chemical properties and reactivity of the resulting catalysts. It was found that the most responsible factor in determining the catalytic activity of the methanol synthesis catalyst is the preparation method rather than the incorporation of manganese as the structure modifier. There is a substantial correlation between the copper metal surface area and the activity of the catalyst derived from the structurally active precursor, hydrotalcite-like layered double hydroxides.
机译：测试了一系列甲醇合成催化剂CuO / ZnO / Al2O3和含5 mol％锰与γ-Al2O3物理混合的CuO / ZnO / Al2O3，用于由合成气直接合成二甲醚。通过将金属硝酸盐与几种类型的碱金属碳酸盐溶液共沉淀来制备催化剂。以Na2CO3，NaHCO3 / Na2CO3缓冲液和NaHCO3的水溶液为沉淀剂，研究了制备方法对前驱体微观结构，理化性质和所得催化剂反应性的影响。发现确定甲醇合成催化剂的催化活性的最主要因素是制备方法，而不是掺入锰作为结构改性剂。铜金属的表面积与由结构活性前体类似水滑石的层状双氢氧化物衍生的催化剂的活性之间存在显着的相关性。

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