Bandshape luminescence thermometry during in situ temperature measurements has been reported by preparing three catalytically relevant systems, which show temperature-dependent luminescence. One of these systems was further investigated as a showcase for application. Microcrystalline NaYF4 doped with Er3+ and Yb3+ was mixed with a commercial zeolite H-ZSM-5 to investigate the Methanol-to-Hydroc...

A study was conducted to evaluate the effect of reaction pressure on the toluene disproportionation reaction using ZSM-5 zeolite based catalyst impregnated with molybdenum. Results showed that there is a marked difference in toluene conversion and xylenes selectivity using nitrogen and hydrogen carrier gases and the reaction pressure. Toluene conversion under nitrogen pressure was higher than u...

Rice husk is an agricultural waste that has the potential source of silica in low-cost zeolite synthesis. The objectives this study were 1) extraction rice husks as synthetic raw materials, 2) synthesis and characterized ZSM-5 from silica. Silica was carried out by soaking using a heated 15% NaOH solution. Furthermore, 10% HNO3 solution added to pH 7 for 12 hours. filtrate dried oven hours at 1...

Objective(s): Binary hybrids of chitosan-zeolite have many interesting applications in separation and bacteriostatic activity. Materials and Methods: Template free ZSM-5 zeolite was synthesized by hydrothermal method, physical hydrogels of nano chitosan in the colloidal domain were obtained in the absence of toxic organic solvent and then nano chitosan/ZSM-5 hybrid composites with nano chitosan...

A micro-spectroscopic method has been developed to probe the accessibility of zeolite crystals using a series of fluorescent 4-(4-diethylaminostyryl)-1-methylpyridinium iodide (DAMPI) probes of increasing molecular size. Staining large zeolite crystals with MFI (ZSM-5) topology and subsequent mapping of the resulting fluorescence using confocal fluorescence microscopy reveal differences in stru...

Fe (2 wt%)-Cu (1.5 wt%)-ZSM-5 SCR catalyst contacted 1.5 wt% of Na and 1.8 K in order to simulate poisoning by species more specifically contained exhaust gases from diesel engines power plants. Poisoning agents do not cause loss surface area nor pore occlusion. XRD SEM results showed that alkali metals introduction did deteriorate the crystallinity morphology zeolite crystals. However, a signi...

Transformation of lignocellulosic biomass into high-value chemicals is a viable strategy for sustainable development bio-based economy. 5-Hydroxymethylfurfural (HMF) one potential platform bio-chemicals the manufacture various renewable products. In this work, commercial H-ZSM-5 zeolite was used as starting material preparing series acid catalysts with bifunctionality direct dehydration glucose...

The ammoxidation of ethane over the conventional metal oxide and Co/zeolite catalysts faces challenge inadequate selectivity owing to formation CO2, N2, NOx. Here we report that Sn modified ZSM-5 catalyst is highly selective for ammoxidation. C- N-based acetonitrile selectivities are up 80 % 70 Sn/HZSM-5, but they below 60 20 %, Co/HZSM-5. We suggested (IV) cations critical active sites formati...