Abstract. SAPO-34 and ZnAPO-34 materials (Zn incorporated by isomorphic substitution in AlPO-34 material) were synthesized hydrothermal synthesis using triethylamine (TEA) as the structure directing agent (SDA). The presented both is to chabazite zeolite (CHA). However, they have different properties such textural (Z34 S34 a surface area of ​​485 603 m2/g, respectively), crystal sizes acid prop...

In recent decades, manufacturers’ intense competitiveness to suit consumer expectations has compelled them abandon the conventional workflow in favour of a more flexible one. This new trend increased importance master production schedule and make-to-order (MTO) strategy concepts. The former improves overall planning controls complexity. latter enables businesses reinforce their flexibility prod...

H-ZSM-5 zeolite is a typical catalyst for methanol-to-olefins (MTO) conversion. Although the performance of catalysts MTO conversion related to actual location acid sites in framework, catalytic roles different pore channels are not well understood. In this study, reaction network, involving aromatic cycle, alkene and aromatization process, also diffusion behavior methanol feedstock olefin prod...

Abstract Recently, dielectric/metal/dielectric (DMD) transparent electrodes based on MoO 3 have been applied in solar cells and organic light emitting diodes, by virtue of the favourable properties as hole-transport/hole-injection material. However, amorphous layers are easily dissolved water, thus inhibiting device processing with water-based solutions. To improve stability present study intro...

Th oaoer gives an overview of commonly used synchronization primitives and literature and presents a new form of primitive expressing conditional critical regions. A new solution is presented to the problem of "readers and wr.ters . ut.l.z.ng the DroDo4d synchronization primitive. The solution is simpler and shorter than other known S'ms The first sections of the paper give a tutorial introduct...

Using muffin tin orbital (MTO) based NMTO-downfolding technique we analyze the electronic structure of the low-dimensional quantum spin system CuTe2O5 which has been recently investigated (J. Deisenhofer et al, Phys. Rev. B, 74 (2006) 174421) in terms of susceptibility and electron spin resonance measurements. Our study indicate that contrary to the findings by Deisenhofer et al, the system may...

• 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...

In order to enhance the catalytic performance of SAPO-34 catalyst for the reaction of methanol to olefins (MTO), ultrasonic and microwave-assisted aging method were employed in static hydrothermal method to synthesize nano-sized SAPO-34. The effects of the application of this method on the chemical composition, morphology, surface area and total acidity of SAPO-34 were characterized by XRD, FE-...