摘要
在加压下研究了硫化钙在 73 0～ 970℃的氧化行为及动力学和模型 ,结果表明 :硫酸钙是硫化钙氧化的惟一产物 ,增大压力或提高温度均能使硫化钙的转化率增加 ,加压下可抑制硫化钙和硫酸钙的固固反应 。
The behavior, kinetics and model for oxidation of CaS at 730-970°C under pressure of 0.1 MPa and 1 MPa were investigated using TG technique. The oxidation product was analyzed by XRD spectra. The results showed that CaSO4 was the only product of oxidation of CaS. The conversion of CaS was enhanced by increasing pressure or temperature. The solid-solid reaction between CaS and CaSO4 was suppressed under pressure. The activation energy for chemical control and diffusion control was 73.08 kJ&bullmol-1 and 137.3 kJ&bullmol-1 and the pre-exponential factor for them was 3.905 × 10-5 and 0.1298 respectively. The oxidation rate of CaS was controlled by diffusion process.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2003年第5期625-632,共8页
CIESC Journal
基金
国家重点基础研究发展规划项目(No G19990 2 2 10 2 )~~
关键词
硫化钙
氧化
加压
动力学
未反应核模型
Activation energy
Diffusion
Mathematical models
Oxidation
Pressure
Reaction kinetics
Sulfur compounds
