کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
159596 | 457041 | 2008 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Determination of intrinsic rate constants of the CaO–CO2 reaction
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The rate constant of the CaO–CO2 reaction was studied for two sorbents using an atmospheric thermogravimetric analyzer (ATGA) and a pressurized thermogravimetric analyzer (PTGA). A grain model was used to determine the rate-controlling steps. The intrinsic rate was found to have a variable order with respect to CO2 partial pressure, with a first-order reaction changing to zero-order dependence when the CO2 partial pressure exceeded ∼10kPa. No further rate enhancement was observed under pressurized conditions, which was explained by a two-step Langmuir mechanism. The activation energies were 29±429±4 and 24±6kJ/mol for the limestone and dolomite tested.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 63, Issue 1, January 2008, Pages 47–56
Journal: Chemical Engineering Science - Volume 63, Issue 1, January 2008, Pages 47–56
نویسندگان
Ping Sun, John R. Grace, C. Jim Lim, Edward J. Anthony,