کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
64020 48265 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of modified Ce-SAPO-34 catalysts and their catalytic performances of methanol to olefins
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Preparation of modified Ce-SAPO-34 catalysts and their catalytic performances of methanol to olefins
چکیده انگلیسی

The modified Ce-SAPO-34 catalysts were prepared with three methods, i.e., the liquid ion exchange with air calcination, impregnation with air calcination and impregnation with steam calcination methods. The catalytic performances of the catalysts for methanol to olefins were investigated. The properties of the catalysts were characterized using XRD, BET, XRF, FT-IR and NH3-TPD. The results indicated that compared to the SAPO-34 catalyst the catalyst prepared with the impregnation and air calcination prolonged the lifetime by 40 min and improved the selectivity to ethylene by 5% (mol) and the catalyst prepared with the impregnation and steam calcination showed the best modification effect, prolonging the lifetime by 70 min and improving the ethylene selectivity by 10% (mol). The catalyst prepared with the liquid ion exchange showed similar behaviour as the SAPO-34 catalyst. It was verified that the porous structure and surface acidity of these catalysts determined their catalytic behaviors.

Modified Ce-SAPO-34 catalysts were prepared with liquid ion exchange, impregnation and air calcination, and steam calcination methods. Catalyst prepared with the steam calcination showed the best catalytic effect and prolonged the lifetime by 70 min.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Energy Chemistry - Volume 22, Issue 4, July 2013, Pages 605–609
نویسندگان
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