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首页> 外文期刊>Catalysis science & technology >Nickel oxide supported on porous clay heterostructures as selective catalysts for the oxidative dehydrogenation of ethane
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Nickel oxide supported on porous clay heterostructures as selective catalysts for the oxidative dehydrogenation of ethane

机译：氧化镍支持多孔粘土异质结构的选择性催化剂的乙烷氧化脱氢

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Porous clay heterostructures (PCH) have shown to be highly efficient supports for nickel oxide in the oxidative dehydrogenation of ethane. Thus NiO supported on silica with a PCH structure shows productivity towards ethylene three times higher than if NiO is supported on a conventional silica. This enhanced productivity is due to the increase in the catalytic activity and especially to the drastic increase in the selectivity to ethylene. Additionally, PCH silica partially modified with titanium in the columns (PCH-Ti) have also been synthesized and used as supports for NiO. An enhanced activity and selectivity to ethylene was found over NiO supported over PCH-Ti compared to the corresponding catalysts supported over the Ti-free PCH. The enhanced catalytic performance has been related to the high dispersion of nickel oxide particles on the support, which leads to a lower reducibility of the nickel oxide, hindering the oxidation of ethane into carbon oxides. More interestingly, the particle morphology plays an important role on the catalyst selectivity since a higher distortion of the NiO crystal lattice parameter meant an enhanced selectivity to ethylene.
机译：多孔粘土异质结构(PCH)显示氧化镍的高效支持乙烷氧化脱氢。支持与PCH硅结构显示生产力对乙烯高出三倍在传统的支持比NiO二氧化硅。提高催化活性,特别是选择性的急剧增加乙烯。修改与钛列(PCH-Ti)也被合成,用作支持吗NiO。乙烯/ NiO支持/ PCH-Ti被发现而相应的催化剂支持在Ti-free PCH。表现与高有关氧化镍颗粒的分散支持,从而导致更低的还原性氧化镍,阻碍的氧化乙烷碳氧化物。粒子形态起着重要的作用在催化剂选择性更高NiO晶格的畸变参数意味着一个增强乙烯的选择性。

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