Effects of Na&lt;sup&gt;+&lt;/sup&gt; in Dilution Steam and Coke Deposition on Catalytic Performance of Methanol-to-Propylene Catalysts

Wang, Feng; Shu-Jun, YAN; Xiaojing, Yong; Zhang, Qing; Wen, Ping; Gong, Yumei; Dou, Tao

doi:10.3866/pku.whxb201211143

Cited by 3 publications

(1 citation statement)

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“…The propene demand is expected to grow faster than the supply, the technologies for propene production, such as propane dehy-drogenation, metathesis, and methanol to olefins conversion, have received much attention recently. [1][2][3] Among them, the crossmetathesis of ethylene and 2-butenes has already been com-Vol.31 mercialized as an economical means to produce propene. [4][5][6] Autometathesis of butene is another promising way since it negates the loss of the valuable ethene in the production of propene.…”

Section: Introductionmentioning

confidence: 99%

Influence of Tungsten Loadings on the 1-Butene Metathesis Reaction over W/SiO2/Al2O3 Catalysts

柳娜¹,

张辉²,

薛念华³

et al. 2015

Acta Physico-Chimica Sinica

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A series of W/SiO2/Al2O3 catalysts with various tungsten loadings were synthesized via the impregnation method. The as-synthesized catalysts were characterized by X-ray diffraction (XRD), Raman spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy, H2 temperature-programmed reduction (H2-TPR), and NH3 temperature-programmed desorption (NH3-TPD). The results reveal that the tungsten loadings were crucial to the dispersion and reducibility of the tungsten oxide species and the acidity of catalysts. The catalytic performances were also investigated during the metathesis of 1-butene to propene. Amongst these catalysts, W/SiO2/Al2O3 with a tungsten mass fraction of 6.0% gave the highest activity and stability during the 1-butene metathesis reaction. The excellent catalytic performance of the catalyst containing a tungsten mass fraction of 6.0% is attributed to its moderate dispersion, suitable reducibility of the WOx species and suitable acidity. We speculate that these factors are favorable for the formation of active centers for olefin metathesis.

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