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首页> 外文期刊>Applied Surface Science >Evidence of surface active sites on NaY zeolite by a model reaction
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Evidence of surface active sites on NaY zeolite by a model reaction

机译：通过模型反应证明NaY分子筛上的表面活性位

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Owing to the development of a new test reaction, namely the isomerization of 1-dodecene, it becomes possible to characterize the activity of cationic zeolites under conditions close to those of industrial adsorption and separation processes (temperature around 150-200℃ and liquid phase). Indeed, 1-dodecene is highly active and still in a liquid state at 150℃. Furthermore, by comparing the reactivity of NaY before and after treatments applied to reduce its activity ((ⅰ) passivation of the external surface by deposition of TetraEthylOrthoSiloxane (TEOS) and (ⅱ) washing the zeolite with a basic or neutral solution), we are able to propose a nature and localization for the residual active sites of this zeolite. Indeed, the evolution of the NaY activity in their function indicates that the active sites are located both at the external and internal surfaces of NaY and that two types of sites can be described: OH groups and structure defects.
机译：由于开发了一种新的测试反应，即1-十二碳烯的异构化，因此有可能在接近工业吸附和分离工艺（温度约150-200℃和液相）的条件下表征阳离子沸石的活性。 。实际上，1-十二碳烯具有很高的活性，并且在150℃时仍处于液态。此外，通过比较NaY在降低其活性的处理前后的反应性（（ⅰ）通过沉积四乙基邻硅氧烷（TEOS）钝化外表面和（ⅱ）用碱性或中性溶液洗涤沸石），我们能够为这种沸石的残留活性位点提出性质和定位。确实，NaY活性功能的演变表明活性位点位于NaY的外表面和内表面，并且可以描述两种类型的位点：OH基团和结构缺陷。

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