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
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Determination of intrinsic rate constants of the CaO–CO2 reaction
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
نویسندگان
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