کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6591463 | 456879 | 2013 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Integrated modelling of reaction and catalyst deactivation kinetics-Hydrogenation of sitosterol to sitostanol over a palladium catalyst
ترجمه فارسی عنوان
مدل سازی یکپارچه سینتیک غیر فعال سازی واکنش و کاتالیزور - هیدروژن سازی سیتسترون به سیتواستانول بر روی یک کاتالیزور پالادیوم
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کلمات کلیدی
مسمومیت کاتالیستی، مدل مکانیکی، راه حل نیمه تحلیلی، راکتور بچ
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Catalyst deactivation is traditionally described with semi-empirical models involving separable kinetics and time-dependent activity factors, but the rational approach is to treat catalyst deactivation as a chemisorption process among other surface processes. The catalytic process AâR along with surface poisoning P+ââPâ (â is an active site) was modelled for batch and continuous reactors. Simple semi-analytical mathematical solutions were obtained, which avoid the use of surface coverage in computations. Numerical simulations revealed the behaviour of the model in the parameter space. For batch reactors, the approach to a limit conversion as well as the increase of the apparent reaction order due to catalyst poisoning was illustrated. The model was applied to batchwise hydrogenation of sitosterol to sitostanol on a dispersed platinum catalyst and in the presence of a sulphurous poison. The behaviour of the system was successfully described with a simple, mechanistic model based on the adsorption-reaction-poisoning concept.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 104, 18 December 2013, Pages 156-165
Journal: Chemical Engineering Science - Volume 104, 18 December 2013, Pages 156-165
نویسندگان
Tapio Salmi, Dmitry Yu. Murzin, Johan WärnÃ¥, Päivi Mäki-Arvela, Gerson Martin,