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| 1 | Synergistic effect between Sn and K promoters on supported platinum catalyst for isobutane dehydrogenation显示文摘Catalytic dehydrogenation of isobutane has recently received considerable attention because of the increasing demand for isobutene.In this study,the synergistic effect between Sn and K on PtSnK/γ-Al2O3 catalysts has been investigated by changing the content of Sn.It was found that with the presence of potassium,suitable addition of Sn could not only increase the metal dispersion,but also reduce the catalyst acidity.In these cases,the synergistic effect could also strengthen the interactions between the metal and support,which resulted in an increase in both catalytic activity and stability.In our experiments,Pt-0.6SnK/Al catalyst exhibited the lowest deactivation rate (12.4%) and showed a selectivity to isobutene higher than 94% at the isobutane conversion of about 45.3% after running the reaction for 6 h.However,with the excessive loading of Sn,surface property of active sites and the interactions between metal and support were changed.As a result,the initial optimal ratio between the metallic function and acid function would be destroyed,which was disadvantageous to the reaction. | Yiwei Zhang Yuming Zhou Lihui Wan Mengwei Xue Yongzheng Duan Xuan Liu | 2011 | Journal of Natural Gas Chemistry2011，20，6： | 12 |
| 2 | Effect of Ga Addition on Catalytic Performance of PtSnNa/ZSM-5 Catalyst for Propane Dehydrogenation显示文摘PtSnNaGa/ZSM-5 catalysts with different contents of Ga were prepared and characterized by X-ray diffraction (XRD), nitrogen adsorption, hydrogen chemisorption, ammonia temperature-programmed desorption (NH3-TPD), hydrogen temperature-programmed reduction (H2-TPR), and temperature-programmed oxidation (TPO) techniques. The performances of these catalysts for propane dehydrogenation were investigated. The test results indicated that the addition of Ga not only could improve the catalytic stability and propene selectivity, but also could effectively prevent the catalysts from coking. It was found that the PtSnNaGa(0.5 m%)/ZSM-5 catalyst exhibited the best performance in terms of propene selectivity and propane conversion. The high catalytic performance was most probably attributed to the presence of Ga that could strength- en the interaction between metals and the support to stabilize the catalytic active sites. | Liu Xuan Zhou Yuming Zhang Yiwei Duan Yongzheng Xue Mengwei Wan Lihui (School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189) | 2011 | China Petroleum Processing & Petrochemical Technology2011，13，4： | 7 |
| 3 | Copper adsorption through chitosan immobilized on sand to demonstrate the feasibility for in situ soil decontamination显示文摘 | Mengwei Wan loana G Petrisor Hsuan-Ting Lai | 2004 | Carbohydrate Polymers2004，，55： | 1 |
| 4 | Copper adsorption through chitosan immobilized on sand to demonstrate the feasibility for in situ sool decontamination显示文摘 | Wan Mengwei Petrisor Ioana G Lai Hsuan-Ting | 2004 | Carbohydrate Polymers2004，55，： | 1 |
| 5 | Adsorption of copper (Ⅱ) and lead (Ⅱ) ions from aqueous solution on chitosancoated sand显示文摘 | Wan Mengwei Kan Chichuan Rogel B D | | 0，，03： | 1 |
| 6 | Enhance efficiency of tetraoctylammonium fluoride applied to ultrasound-assisted oxidative desulfurization (UAOD) process 显示文摘 | Wan Mengwei Yen Tehfu | 2007 | Applied Catalysis A : General2007，319，： | 1 |
| 7 | Enhance efficiency of tetraoctylammonium fluoride applied to ultrasound-assisted oxidative desulfurization(UAOD) process显示文摘 | Wan Mengwei Teh Fu Yen | 2007 | Applied Catalysis A: General2007，319，： | 1 |
| 8 | Portable continuous ultrasound-assisted oxidative desulfurization unit for marine gas oil 显示文摘 | Wan Mengwei Teh Fu Yen | 2008 | Energy & Fuels2008，22，： | 1 |
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