Nanocrystals of zeolites with shortened diffusional pathways compared to bulk counterparts are attractive catalysts, but their direct synthesis often remains challenging and expensive. Here, we describe the utility p-phenylenedimethylene–bis(trimethylammonium) dichloride, an organic diquaternary ammonium compound that can be easily prepared, as effective structure-directing agent (OSDA) for obt...

Zeolite is a crystalline alumino-silicate microporous material, which has been widely used as ion-exchangers, adsorbent and catalyst.
 Recently, several researches highlights the progress of zeolite-based catalysts in CO2 conversion to valuable products.
 In present work, hydrothermal synthesis mordenite zeolite crystals, with composition chemical products Al2O3, 12.5 SiO2,2.4 NaOH, 1...

Temperature dependencies of 27Al and 23Na nuclear magnetic resonance spectra and spin-lattice relaxations in mordenite have been studied in static and magic angle spinning regimes. Our data show that the spin-lattice relaxations of the 23Na and 27Al nuclei are mainly governed by interaction of nuclear quadrupole moments with electric field gradients of the crystal, modulated by translational mo...

Ion exchange properties of five different Japanese natural zeolites in seawater were examined. Sodium ions could be reduced by all zeolites, although anions, Cl(-) and SO(4)(2-), in seawater showed barely changes. Natural zeolite desalination treatment mainly depends on the ion exchange between Na(+), K(+) and Mg(2+) in seawater and Ca(2+) in natural zeolite. This study found that mordenite ...

As clean energy, methane has huge reserves and great development potential in the future. Copper zeolites are efficient oxidation of to methanol. Water been confirmed as a source oxygen regenerate copper-zeolite active sites enable selective anaerobic In this work, we report that methanol yield increased from 36 μmol/g (Cu-MOR1) 92 (Cu-MOR1-water) result water enhancing activity copper ion-exch...

To achieve the CO2 emission control as urgent task of Carbon Peak and Neutrality, desorption experiments were performed with a new tri-solvent MEA-EAE(2-(ethylamino)ethanol)-DEEA(N, N-diethylethanolamine) five solid acid catalysts: blended catalysts γ-Al2O3/H-ZSM-5 = 2:1, H-Beta (Hβ), H-mordenite, HND-8, HND-580 H2SO4 replacement. A series sets in typical recirculation process by means both hea...

Varying the extraframework metal cation on alkali exchanged mordenite tunes ethanol dehydrogenation properties of ZnO supported mordenite, resulting in enhanced lifetime, low ethylene selectivity and increased acetaldehyde productivity per Zn.