This study investigated carbon monoxide methanation with 15 %NiO doped SAPO-34 zeolite-supported catalysts. The support was produced by hydrothermal synthesis, and nickel oxide added to the impregnation surfactant-assisted method, dissolved in different solvents (water, ethanol, acetone, 1-propanol). Various characterization techniques, N2 physisorption, XRD, SEM, TEM, FTIR, were used determine...

SSZ-13 materials have been synthesized with varying amounts of Al to produce samples with different concentrations of Brønsted acid sites, and consequently, these SSZ-13 materials contain increasing numbers of paired Al heteroatoms with increasing Al content. These materials were then characterized and tested as catalysts for the methanol-toolefins (MTO) reaction at 400 °C and 100% methanol con...

Bifunctional catalysts containing a dehydrogenation–hydrogenation function and an acidic are widely applied for the hydroconversion of hydrocarbon feedstocks obtained from both fossil renewable resources. It is well known that distance between two functionalities important performance catalyst. In this study, we show heat treatment catalyst precursor can be used to steer location Pd with respec...

Methanol to olefins (MTO) reaction as an important non-oil route produce light has been industrialized, and received over 80% ethylene plus propylene selectivity. However, achieve high single or selectivity towards the fluctuated market demand is still full of challenge. Small-pore SAPO-14 molecular sieve a rare MTO catalyst exhibiting extra-high It provides us valuable clue for further underst...

The influence of the nature of the cation on the interaction of the silicoaluminophosphate SAPO-34 with small hydrocarbons (ethane, ethylene, acetylene, propane, propylene) is investigated using periodic density-functional theory calculations including a semi-empirical dispersion correction (DFT-D). Initial calculations are used to evaluate which of the guest-accessible cation sites in the chab...

The methanol-to-olefin process is a showcase example of complex zeolite-catalyzed chemistry. At real operating conditions, many factors affect the reactivity, such as framework flexibility, adsorption of various guest molecules, and competitive reaction pathways. In this study, the strength of first principle molecular dynamics techniques to capture this complexity is shown by means of two case...

The process of predicting news stories popularity from several news sources has become a challenge of great importance for both news producers and readers. In this paper, we investigate methods for automatically predicting the number of clicks on a news story during one hour. Our approach is a combination of additive regression and bagging applied over a M5P regression tree using a logarithmic ...