【摘 要】
：
Effect of reaction temperature and pressure on the metathesis reaction between ethene and 2-butene to propene was studied on the WO3/γ-Al2O3-HY catalyst. The a
【机 构】
：
Laboratory of Natural Gas and Applied Catalysis,Graduate School of Chinese Academy of Sciences
论文部分内容阅读
Effect of reaction temperature and pressure on the metathesis reaction between ethene and 2-butene to propene was studied on the WO3/γ-Al2O3-HY catalyst. The activity is found to increase with elevated temperature and reaches a plateau at 150-240 ℃. After that, the activity undergoes a remarkable decrement at too high temperature. The effect of temperature is elucidated by the oxidation state of tungsten species. The evaluation results also indicate that the stability is dependent on this reaction parameter. Medium pressure (0.5-0.8 MPa) is favorable for stability, while atmospheric pressure or too high pressure (＞1.0 MPa) deteriorates the stability. For explanation, UV Vis, FT-IR, O2-TPO, and TG techniques are used to characterize the spent catalysts.
其他文献
Jute fibre properties, viz. linear density, mechanical properties, and fibre staple length were analyzed in this paper. Morphology, lignin content, and composit
A new method for the activation of crystalline magnesium chloride by polyethylene glycol was described.Polyethylene glycol could solubilize crystalline magnesiu
The state-space method is employed to evaluate the modal parameters of functionally graded, magneto-electro-elastic, and multilayered plates. Based on the assum
A copolymer of poly(acrylonitrile-co-styrene) (SAN) was synthesized via an emulsion polymerization method.Novel polymer electrolyte membranes cast from the blen
Discretization based on rough set theory aims to seek the possible minimum number of the cut set without weakening the indiscernibility of the original decision
Liquid crystals containing phenylpyrimidine units are the fascination condensed state of soft matter with unique electrical, optical and mechanical properties.
The adsorptive and electrochemical behaviour of phoxim on a hanging mercury drop The procedure was successfully applied for the assay of phoxim in vegetable and