کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9617656 | 49176 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Silicalite-1 coating on Pt/TiO2 particles by a two-step hydrothermal synthesis
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
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![عکس صفحه اول مقاله: Silicalite-1 coating on Pt/TiO2 particles by a two-step hydrothermal synthesis Silicalite-1 coating on Pt/TiO2 particles by a two-step hydrothermal synthesis](/preview/png/9617656.png)
چکیده انگلیسی
Silicalite-1 membranes were synthesized on spherical Pt/TiO2 particles by a two-step synthesis, which includes consecutive hydrothermal syntheses with and without stirring synthetic solutions in order to control the rates of nucleation and crystal growth. The silicalite-1-coated Pt/TiO2 particles (silicalite-1/Pt/TiO2) were composed of a thinner silicalite-1 layer with smaller crystals than the one synthesized by a one-step synthesis, which had been previously reported. The silicalite-1/Pt/TiO2 shows higher activity for hydrogenation of a mixture of linear 1-hexene (1-Hex) and dibranched 3,3-dimethylbut-1-ene (3,3-DMB) than the previous results because of its thinner effective membrane thickness. Hydrogenation selectivities of 1-Hex/3,3-DMB were very high (20-35 at 323Â K and 22-70 at 373Â K) due to the selective permeation of the reactant 1-Hex into Pt/TiO2 particles through the silicalite-1 layer. These high selectivities indicate that the membrane quality was improved by the two-step synthesis. Permeances of 1-Hex and 3,3-DMB through the silicalite-1 membrane coating could be determined by an integral reactor analysis assuming permeation control in the reaction performance of the coated particle.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microporous and Mesoporous Materials - Volume 83, Issues 1â3, 1 September 2005, Pages 244-250
Journal: Microporous and Mesoporous Materials - Volume 83, Issues 1â3, 1 September 2005, Pages 244-250
نویسندگان
Norikazu Nishiyama, Keita Ichioka, Manabu Miyamoto, Yasuyuki Egashira, Korekazu Ueyama, Leszek Gora, Weidong Zhu, Freek Kapteijn, Jacob A. Moulijn,