کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
672643 | 1459446 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Selective chlorination of CaO from titania slag by CO+Cl2 mixtures in fluidized bed
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This paper presents a facile approach to selectively decrease the CaO content in titania slag from 1.09 to 0.18Â wt.% under a selective chlorination atmosphere of Cl2 and CO. Thermodynamic analysis indicated that a predominance area exists to selectively chlorinate CaO with a low reduction potential. The intrinsic chlorination kinetics indicated that both the high partial pressure of chlorine and high temperature were advantageous to increase the chlorination selectivity of CaO. Under the guidance of the thermodynamic and intrinsic kinetics, selective chlorination kinetics of CaO from titania slag were conducted at 1173-1273Â K and were represented by the pore-blocking rate law. The present study indicated that a high concentration of reactant gases with a low reduction potential at high temperature could simultaneously overcome the inner mass transfer resistance while maintaining a high chlorination selectivity. The optimized partial pressures of Cl2 and CO were 0.8 and 0.2Â atm, respectively, and the temperature was 1273Â K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 640, 20 September 2016, Pages 66-73
Journal: Thermochimica Acta - Volume 640, 20 September 2016, Pages 66-73
نویسندگان
Qiao Wang, Qingshan Zhu, Chuanlin Fan, Gengyu Zhang, Hongzhong Li,