摘要
由空气-水、液体石蜡-细颗粒黄沙、石英砂、催化剂构成三相体系,常压下在表观气速0.10×10-2～1.5×10-2 cm·s-1 、固体浓度为0～0.34 g·ml-1溶剂、搅拌转速450～1500 r·min-1的实验条件下,采用溶氧仪研究了三相机械搅拌反应器的气液传质特性,考察了操作参数和液体性质、颗粒粒径及密度等物性因素对液相容积传质系数kLa的影响,用改进的高斯-牛顿法进行参数估值,得到kLa与上述因素的量纲1关联式,统计检验表明,所得量纲1关联式与实验值拟合情况良好,可为后续搅拌反应釜中三相淤浆床甲醇合成过程分析与模拟提供传质基础数据.
The gas-liquid mass transfer characteristics of three-phase system consisting of air, water/ paraffin and sand/quartz sand/catalyst XNC98 were studied in a mechanically agitated reactor. At atmospheric pressure, the influences of operational factors and physical property parameters such as liquid property, particle size, particle density on volumetric liquid-phase mass transfer coefficient kLa were investigated under the conditions of superficial gas velocity range from 0.10 × 10P-2 cm·s-1 to 1.5 × 10-2 cm·s-1, solid concentration from 0 to 0.34 g·ml-1 (solvent), impeller speed from 450 r·min-1 to 1500 r·min-1. kLa was determined by a dissolved oxygen electrode. A dimensionless correlation of kLa with the above factors was proposed and the parameters in the correlation equation were obtained with the improved Gauss-Newton method. The statistical test showed that the values predicted by the correlation equation were in good agreement with the experimental data. The results would provide basic experimental data for the subsequent process analysis and mathematical simulation of the three-phase methanol synthesis in agitated slurry reactor.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2005年第2期220-226,共7页
CIESC Journal
