کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9694085 1459639 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Kinetics of the thermal decomposition of sodium hydrogencarbonate evaluated by controlled rate evolved gas analysis coupled with thermogravimetry
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Kinetics of the thermal decomposition of sodium hydrogencarbonate evaluated by controlled rate evolved gas analysis coupled with thermogravimetry
چکیده انگلیسی
Influences of the product gases on the kinetics of the thermal decomposition of sodium hydrogencarbonate, NaHCO3, were investigated by means of controlled rate evolved gas analysis coupled with TG (CREGA-TG). From a series of CREGA-TG measurements carried out under controlled gaseous concentrations of CO2 and H2O by considering the self-generated CO2 and H2O during the course of reaction, anomalous effects of CO2 and H2O on the kinetic rate behavior of the thermal decomposition of NaHCO3 were revealed, that the reaction is decelerated and accelerated by the effects of atmospheric CO2 and H2O, respectively. The kinetic rate behavior under controlled atmospheric condition of CO2 = 0.1 g m−3 and H2O = 1.2 g m−3 was characterized by the apparent fitting to a kinetic equation of Avrami-Erofeev type with the apparent activation energy of Ea = 111.5 ± 4.8 kJ mol−1 and pre-exponential factor of A = (1.29 ± 0.01) × 1011 s−1. The effects of atmospheric CO2 and H2O on the apparent kinetic parameters were appeared as the decreases in both the values of Ea and A and the increase in the value of A, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 431, Issues 1–2, 15 June 2005, Pages 38-43
نویسندگان
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