کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9614773 | 48544 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A comparative study of Pd supported on MCM-41 and SiO2 in the liquid phase hydrogenation of phenyl alkyl acetylenes mixtures
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The stereoselective hydrogenation of phenyl alkyl acetylenes at 298Â K and atmospheric pressure of hydrogen over Pd-supported catalysts has been studied. The catalysts were prepared by impregnation of MCM-41 and SiO2 with Pd(acac)2 precursor, with metal content close to 1Â wt.%. All the solids were characterised by nitrogen adsorption-desorption isotherms at 77Â K, TPR, H2 and CO chemisorption, XRD and TEM measurements. Three competitive reaction systems 1-phenyl-1-pentyne/1-phenyl-1-propyne, 1-phenyl-1-pentyne/1-phenyl-1-butyne, 1-phenyl-1-butyne/1-phenyl-1-propyne have been examined. The results show that the competitive reaction results in an increase of the hydrogenation rate for phenyl alkyl acetylene with minor alkyl chain size in all studied systems. The reactions were found to be zero order concerning the alkyne concentration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis A: Chemical - Volume 231, Issues 1â2, 20 April 2005, Pages 67-74
Journal: Journal of Molecular Catalysis A: Chemical - Volume 231, Issues 1â2, 20 April 2005, Pages 67-74
نویسندگان
N. MarÃn-Astorga, G. Pecchi, J.L.G. Fierro, P. Reyes,