Novel cobalt zinc oxide Fischer-Tropsch catalysts synthesised using supercritical anti-solvent precipitation

Raimon P. Marin; Simon A. Kondrat; Thomas E. Davies

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Novel cobalt zinc oxide Fischer-Tropsch catalysts synthesised using supercritical anti-solvent precipitation

机译：新型的氧化钴氧化锌Fischer-Tropsch催化剂，使用超临界抗可溶性沉淀合成

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Cobalt zinc oxide catalysts have been prepared by anti-solvent precipitation in supercritical CO2 and investigated for CO hydrogenation. Here we show how the textural and catalytic properties of the catalyst can be tailored by the addition of water to the initial solution of cobalt and zinc acetates in methanol. Characterization of the catalysts by powder X-ray diffraction, infra-red and Raman spectroscopy showed that in the absence of water a high surface area mixed acetate was produced which upon calcination formed wurtzite type Zn_(1-x)Co_xO and spinel type Zn_xCo_(3-x)O4. The addition of 5 vol.% water resulted in a phase separated Co3O4/ZnO catalyst and enhanced active cobalt surface area as a result of disruption of the solvent/CO2 phase equilibrium during precipitation.

机译：通过超临界二氧化碳中的抗溶剂沉淀制备了氧化碳氧化锌催化剂，并研究了CO氢化。在这里，我们展示了如何通过在甲醇中钴和乙酸锌的初始溶液中添加水来调整催化剂的质地和催化特性。通过粉末X射线衍射对催化剂的表征，红外和拉曼光谱法表明，在没有水的情况下，产生了高表面积混合乙酸，在形成钙化的wurtzite型wurtzite型Zn_（1-X）（1-X）Co_xo和Spinel Type Zn_xco_（Zn_xco_（ 3-X）O4。加入5卷，水导致了一个相分离的CO3O4/ZnO催化剂，并增强了由于沉淀过程中溶剂/CO2相的破坏而增加了活性钴表面积。

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来源
《Catalysis science & technology》 |2014年第7期|1970-1978|共9页
作者
Raimon P. Marin; Simon A. Kondrat; Thomas E. Davies;
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作者单位

Cardiff Catalyst Institute, School of Chemistry, Cardiff University, Park Place, Cardiff, CF10 3AT, UK.;

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原文格式 PDF
正文语种英语
中图分类汉语教学;
关键词
precipitation; Fischer-Tropsch catalysts; surface areaCatalystsChemical Precipitationzinc oxidesAcetatesCalcination;

机译：沉淀;Fischer-Tropsch催化剂;表面积催化剂氧化物氧化物盐分钙化;

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Novel cobalt zinc oxide Fischer-Tropsch catalysts synthesised using supercritical anti-solvent precipitation

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