INTRINSIC KINETICS OF THE THERMAL-DECOMPOSITION OF SODIUM-BICARBONATE

被引：22

作者：

WU, YL ^{[1
]}

SHIH, SM ^{[1
]}

机构：

[1] NATL TAIWAN UNIV,DEPT CHEM ENGN,TAIPEI,TAIWAN

来源：

THERMOCHIMICA ACTA | 1993年 / 223卷

关键词：

D O I：

10.1016/0040-6031(93)80132-T

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The intrinsic kinetics of the thermal decomposition of NaHCO3 to Na2CO3 has been studied by non-isothermal thermogravimetric analysis. NaHCO3 powder of 47 mum mean particle size was heated to decomposition at three constant heating rates (1.25, 2.5, and 5-degrees-C min-1) in flowing nitrogen. The range in which the decomposition occurred was about 360-450 K. A graphical method and Friedman's method were both used to analyze the experimental data: close agreement was obtained. The reaction rate showed a first-order dependence on the amount of unreacted NaHCO3 and the values for the activation energy and pre-exponential factor were 25.3 kcal mol-1 (105.8 kJ mol-1) and 6.7 X 10(12) min-1, respectively.

引用

页码：177 / 186

页数：10

共 16 条

[1]

APPLE C, 1982, EPA600S782026 NAT TE

[2] KINETIC-ANALYSIS OF DTG DATA FROM MASTER CURVES [J].

CRIADO, JM .

THERMOCHIMICA ACTA, 1978, 24 (01) :186-189

[3] GENERAL TREATMENT OF THERMOGRAVIMETRY OF POLYMERS [J].

FLYNN, JH ;

WALL, LA .

JOURNAL OF RESEARCH OF THE NATIONAL BUREAU OF STANDARDS SECTION A-PHYSICS AND CHEMISTRY, 1966, A 70 (06) :487-+

[4]

FRIEDMAN HL, 1965, J POLYMER SCI C, V6, P183

[5]

GALOGAZA VM, 1979, GLAS HEM DRUS BEOGRA, V44, P211

[6] USE OF NAHCOLITE ORE AND BAG FILTERS FOR SULFUR-DIOXIDE EMISSION CONTROL [J].

GENCO, JM ;

ROSENBERG, HS ;

ANASTAS, MY ;

ROSAR, EC ;

DULIN, JM .

JOURNAL OF THE AIR POLLUTION CONTROL ASSOCIATION, 1975, 25 (12) :1244-1253

[7]

HARTKE W, 1981, GER CHEM ENG, V4, P203

[8]

JEPSON G, 1965, AICHE ICHE S SER, V3, P41

[9] THERMAL-DECOMPOSITION OF SODIUM-BICARBONATE [J].

KEENER, TC ;

FRAZIER, GC ;

DAVIS, WT .

CHEMICAL ENGINEERING COMMUNICATIONS, 1985, 33 (1-4) :93-105

[10]

SAMUEL EA, 1981, AICHE S SERIES, V77, P54

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