کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9610255 | 47163 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Oligomerization of isobutene on sulfated titania: Effect of reaction conditions on selectivity
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
On sulfated titania prepared by gelling titanium alkoxide with sulfuric acid, isobutene oligomerization was carried out under different operating conditions. Under severe conditions [temperature 140 °C, pressure 600 psi and weight hourly space velocity (WHSV) of 2.5 hâ1], the catalyst reached 100% isobutene conversion and selectivity for C12= and C18= olefins of 54 and 39%, respectively. Meanwhile, under soft conditions (28 °C, 100 psi and 10 hâ1), conversion decreased from an initial value of 55-25% after 30 h on stream, while the selectivity for C8= increased from 42 to 60%. After 90 h on stream, catalyst activity was recovered by introducing nitrogen into the feed and the conversion then reached 90%. These results show that by varying the operating conditions over a sulfated titania catalyst, isobutene oligomerization can be controlled to the desired C8= or C12= olefin yield.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volumes 107â108, 30 October 2005, Pages 707-712
Journal: Catalysis Today - Volumes 107â108, 30 October 2005, Pages 707-712
نویسندگان
A. Mantilla, F. Tzompantzi, G. Ferrat, A. López-Ortega, S. Alfaro, R. Gómez, M. Torres,