نتایج جستجو برای: mfi zeolite
تعداد نتایج: 10051 فیلتر نتایج به سال:
Kaolin with alumina and silica content is used as the main material in this research to study synthesis of ZSM-5 zeolite. The hydrothermal process was carried out through different aging times, namely 12, 24 36 hours. Tetrapropyl ammonium bromide (TPABr) a template for Mobile Five-1 (MFI) structure guide. X-ray diffraction (XRD) infrared spectroscopy (FTIR) instruments were characterize zeolite...
The nonoxidative catalytic dehydrogenation of ethane allows the production ethylene at lower temperatures than those applied in steam crackers. This, however, requires stable catalysts that minimize coke production. Here, we report a single-component, promoter-free, low-loading, Cr-based catalyst exhibiting high activity, long-term stability, and improved regeneration properties for direct to e...
Pt/Sn-containing MFI zeolites prepared by one-pot hydrothermal methods are highly active and selective catalysts for propane dehydrogenation. An alternative preparation method is reported alongside an in-depth characterization of Pt Sn before after reaction. species dispersed on highly-defective Silicalite-1 show a significantly long catalytic lifetime with improved coke resistance, but increas...
Synthesis of a pentasil-type zeolite with ultra-small few-unit-cell crystalline domains, which we call FDP (few-unit-cell domain pentasil), is reported. made using bis-1,5(tributyl ammonium) pentamethylene cations as structure directing agent (SDA). This di-quaternary ammonium SDA combines butyl ammonium, in place the one commonly used for MFI synthesis, propyl and five-carbon nitrogen-connecti...
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