Palladium-catalyzed acetylene trimerization and the metathesis of olefins catalyzed by molybdenum and its oxides are investigated in ultrahigh vacuum and at high pressures. Benzene is formed on Pd(111) by the reaction between adsorbed acetylene and a surface C4 metallocycle. The resulting benzene evolves in temperature-programmed desorption in two distinct states. The low-temperature state is p...

Hydrogenation of oils might be considered as the largest reaction in the edible oil industry. The reaction consists of the addition of hydrogen at the double bounds of fatty acids. Although for some reasons this might be considered a desirable reaction but for some others it might create problems in the food and nutrition chain circle due to the formation of saturated and trans fatty acids. Soy...

Due to the complexity of materials and energy cycles, distillation system has numerous working conditions difficult troubleshoot in time. To address problem, a novel DMA-SDG fault identification method that combines dynamic mechanism analysis based on process simulation signed directed graph is proposed for process. Firstly, employed build model provide potential relationships between variables...

A family of carbon-embedded copper catalysts was synthesized by pyrolyzing benzene-1,3,5-tricarboxylate (Cu-BTC) at various temperatures ranging from 400 to 900 °C. Characterization demonstrated that the density defect sites on carbon support increases with an increase in pyrolysis temperature leading electron sites. Catalytic performance tests 1,3-butadiene hydrogenation showed becomes more st...

The adsorption and surface reactions of acetaldehyde at 300–673 K on TiO2, CeO2 and Al2O3 were investigated by Fourier transform infrared spectroscopy and mass spectroscopy. Acetaldehyde adsorbs molecularly in two forms on the surfaces: (i) in a less stable H-bridge bonded form and (ii) in a more stable form adsorbed on Lewis sites through one of the oxygen lone pairs. Both forms of molecularly...