Synthesis and activity measurement of the some bifunctional platinum loaded Beta zeolite catalysts for n-heptane hydroisomerization

Ammonium nitrogen removal characteristics of zeolite media in a Biological Aerated Filter (BAF) for the treatment of textile wastewater

“…Natural zeolite was selected because it has high ionic selectivity for NH 4 + ion and is also capable of adsorption capability for organic matters [13,16,17]. For comparing the effectiveness of packing media, sand and activated carbon were also tested because they are normally well used as biofilm media.…”

Catalytic enhancement of platinum supported on zeolite beta for toluene hydrogenation by addition of palladium

“…Zeolite beta in sodium form (NaBEA) was synthesized with a gel Si/Al ratio of 13 and subsequently transformed to HBEA with a conventional ion exchange method [4,14]. Monometallic Pt and Pd catalysts were prepared by incipient wetness impregnation with a solution of dihydrogen hexachloroplatinate (H 2 PtCl 6 , 40%, supplied by the Right Chemical) or palladium (II) acetate (Pd(acac) 2 98%, supplied by Strem Chemicals) onto the HBEA.…”

“…Examples of bifunctional catalysts are those containing Pt on HBEA which were tested for n-heptane hydroisomerization. An increase of Pt content and/or Si/Al ratio of HBEA from 11.7 to 24.5 improved the yield and selectivity [4].…”

“…Stable catalysts for hydroisomerization were those containing Ptor Pd-supported on zeolites such as mordenite (MOR) or BEA [5]. The final conversion and selectivity depended on a number of parameters including acidity and pore structure of the zeolite, the nature and dispersion of the supported metal, and the operating conditions such as temperature and contact time [4].…”

Bulk and surface characterization and isomerization activity of Pt/WO4 2−/ZrO2 catalysts of different preparations

“…In addition, platinum loaded zeolites beta [7,8], ZSM-5 and ZSM-22 [9][10][11], SAPO [12,13] have been investigated in paraffin isomerization reactions, usually at relatively high reaction temperatures such as 250°C or higher.…”