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首页> 外文期刊>Catalysis science & technology >High surface area TiO2-ZrO2 prepared by caustic solution treatment, and its catalytic efficiency in the oxidehydrogenation of para-ethyltoluene by CO2
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High surface area TiO2-ZrO2 prepared by caustic solution treatment, and its catalytic efficiency in the oxidehydrogenation of para-ethyltoluene by CO2

机译:高表面积TIO2-ZRO2通过苛性溶液处理制备,其在二氧化碳对二甲基二苯二氢化合物中的催化效率通过CO2

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摘要

High surface area TiO2-ZrO2 (1:1) has been synthesized by co-precipitation-digestion method using KOH solution as a hydrolyzing agent as well as a digestion medium. The quenching of the mother liquor solution at elevated temperatures resulted in the amorphization of the TiO2-ZrO2 mixed oxide. The highest surface area obtained for TiO2-ZrO2 by the co-precipitation-digestion method is 256 m~2 g~(-1) calcined at 600 °C with complete amorphous nature and having a particle size of less than 5 nm. Herein, we discuss the concept of amorphization of metal oxides based on the digestion times, supported by the characterization of the catalysts and its application in dehydrogenation of substituted benzene, mainly para-ethyltoluene to para-methylstyrene by CO2 as soft oxidant which showed high conversion and selectivities of 69% and 96%, respectively.
机译:高表面积TIO2-ZRO2(1:1)已通过使用KOH溶液作为水解剂和消化培养基合成了共同饮食方法。 在升高温度下,母液溶液的淬灭导致TiO2-Zro2混合氧化物的非晶化。 通过共凝结消化法为TiO2-Zro2获得的最高表面积为256 m〜2 g〜(-1),在600°C下以完全无定形性质,粒径小于5 nm。 本文中,我们根据消化时间讨论金属氧化物的非晶化概念,并由催化剂的表征及其在取代苯的脱氢作用中的应用,主要是para-乙基苯二酚在para-甲基甲苯中,由CO2作为二氧化碳作为软氧化剂,表现出高度转化的氧化剂。 分别为69%和96%的选择性。

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