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N-Hexane Isomerization on Pt-Containing Ti-Pillared Tagan's Montmorillonite

机译:在含Pt的Ti柱状塔南蒙脱石的正己烷异构化

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Ti–pillared interlayered clays have been synthesized by the exchange reaction between acid modified Tagan montmorillonite in Na-form with an aqueous solutions of TiCl_4 and characterized by XRD, N_2–adsorption/desorption analyses, temperature-programmed desorption of ammonia (TPD NH_3), transmission electron microscopy (TEM). The maximum conversion of n–hexane equal to 64.1 % was found on 0.35 %Pt/Ti (5,0) NaHMM + M-catalyst thus the yield of isohexanes makes 45.0 %. At the decrease of platinum amount to 0.1 %, the conversion of n-hexane decreases slightly it makes 61.7 %, and the yield of isohexanes increases by 1.4 %. According to TEM separate dense particles mainly with a sizes of 50– 100 ? are shown. Morelarger particles have the sizes within 200 ?. These particles can be related to the mixture of the phases Pt, PtTi, Pt_3Ti, TiO, TiO_2 that testify about strong interaction of the supported metal Pt with the support with formation of intermetallids (PtTi, Pt_3Ti) and oxides.
机译:通过酸改性Tagan Montmorillonite以Na形的与TiCl_4的水溶液之间的交换反应合成了Ti柱状粘土,其特征在于XRD,N_2吸附/解吸分析,温度编程的氨(TPD NH_3)的解吸,透射电子显微镜(TEM)。在0.35%Pt / Ti(5,0)NaHMM + M催化剂上发现N-己烷等于64.1%的最大转化物,因此异己烷的产率为45.0%。在铂的降低至0.1%时,N-己烷的转化率略微降低,使其产率的产率升高1.4%。根据TEM单独的致密颗粒,主要具有50- 100的尺寸?显示。 Morelarger粒子在200岁内有大小?。这些颗粒可以与阶段Pt,PtTi,Pt_3TI,TiO,TiO_2的混合物有关,其致作符合支撑的金属Pt与形成化合物(PTTI,PT_3TI)和氧化物的载体的载体的强相互作用。

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