Silicoaluminophosphates SAPO-5 and SAPO-11 were synthesized using the hydrothermal method, 170 ºC with triethylamine dipropylamine as structure directing agents, respectively. This work aimed incorporation of boron into structures obtained by modifying composition system, a reaction equation: Al2O3:P2O5:x SiO2: yB2O3:1,5TEA (or DPA):50H2O, x, y=0-0.2. The phase was identified XRD characterized ...

An account is presented on investigation of the effects of synthesis parameters, i.e., reaction sources, silica to alumina ratio, acid molar ratio and crystallization conditions on the crystallinity, morphology and particle size of SAPO-34. The synthesis conditions were designed to produce small particles with narrow size range. The prepared samples were characterized by XRD and SE...

Introdução: A mucopolissacaridose tipo VI (MPS VI) ou síndrome de Maroteaux-Lamy é uma doença metabólica rara, hereditária, conhecida como depósito lisossomal onde os pacientes apresentam deformidades progressivas. Há necessidade se entender comporta o centro gravidade (CG) desses pacientes, forma prevenir quedas e direcionar a terapêutica. Objetivo: Avaliar projeção do estática crianças adoles...

fine particles silicoaluminophosphate-34 were synthesized by hydrothermal sol-gel method. the effect of crystallization time, as one of the important synthesis factors on particle size and crystallinity, kinetic and equilibrium adsorption, and selectivity of co2 / ch4 has been studied in this work. the adsorption isotherms are obtained at moderate gauge pressures (100-3000 kpa) and temperatures...

•Cr2O3(SG)/H-SAPO-34 shows a C2=?C4= selectivity of 95.7% in CO2 hydrogenation •Ethene accounts for more than 74% light olefins with an E/P ratio reaching 3.1 •Ethanol is formed through the reaction H3CO? and H? on Cr2O3(SG) converted into ethene SAPO-34 leads to high Conversion effective strategy sustainable utilization fossil energy biomass. However, highly selective production specific olefi...

Methanol is a key reaction intermediate formed on MnO x that synergistically reacts with SAPO-34 to produce light olefins.

background: the removal of toxic metals from sewage and wastewaters is one of the most important concerns in the twenty first century. the removal of poisonous cr(vi) from aqueous solution by different low-cost available nanoporous adsorbents was investigated in the present study.  methods: fumed silica, bentonite (bn), hydrotalcite (ht), mcm-41, na-y, mordenite (mor) and sapo-34 were used at d...

In this study a special type of silicoaluminophosphate with opal structure (Opal-SAPO) was prepared under microwave condition using tetraethylorthosilicate (TEOS), triethanolamine (TEA), aluminiumisopropoxid and phosphoric acid 85%. The product was characterized by X-ray diffraction (XRD), thermogravimetric (TGA) and Fourier Infrared Spectroscopy (FTIR).The crystalline product showed a good act...

• ERI-type molecular sieves enhance ethylene selectivity in MTO . Acidity significantly influences ethylene-to-propylene ratio materials. Changes acidity alter hydrocarbon-pool species concentration and composition. Low acid site densities hinder the formation of aromatics (thus, ethylene) ERI. (SSZ-98, UZM-12, zeolite, SAPO-17) are synthesized with varying Si/Al = 5–9 Si/T-atoms 0.034–0.12 usi...