摘要
恒压下 ,跟踪测定析氢体积 (V) ,考察了氢氧化钾水溶液与Cu2 7 1 Al72 9合金反应的动力学。在实验结果的基础上 ,提出了理想模型 ,并推导出下述机理型动力学式 : mqt=- ( 1 /3)ln[( 1 +qRt) /( 1 +qRo) ]+ ( 1 /6)ln{[(qRt) 2 - (qRt) + 1 ]/[(qRo) 2 - (qRo) + 1 ]}- ( 1 /3) {arctg[( 2 /3) (qRt- 1 /2 ) ]-arctg[( 2 /3) (qRo- 1 /2 ) ]}其中 ,Rt=Ro[1 -V/( 1 2 4 5WAl) ]1 / 3;t为反应时间 ;m ,q,WAl是与碱溶液浓度 (Co) ,合金粒度 ( 2Ro) ,合金中铝含量 ,以及反应温度 (T)有关的常数。就实验结果和理论预测结果进行了对比 ,结果表明 :机理型动力学式能与实验结果很好地吻合 ,它反映了动力学控制条件下的碱抽提规律。
The kinetics of the reaction between alloy Cu27.1Al72.9 and KOH solution has been studied by in-site measuring the volume (V) of evolved hydrogen at atmospheric pressure Influences of reaction temperature (T), alloy particle size (2R0), and KOH concentration (C0) on the reaction rate (dv/dt) have been investigated A mechanistic model has been proposed and the kinetics equation inferred there from is as follows: mqt=-(1/3)ln[(1+qRt)/(1+qRo)]+(1/6)ln｛[(qRt)2-(qRt)+1]/[(qRo)2-(qRo)+1]｝ -(3/3)｛arctg[(2/3)(qRt-05)]-arctg[(2/3)(qRo-05)]｝; where,Rt=Ro[1-V/(1245WAl)](1/3) By comparing the experimental data with the calculated results from the equation, it was found that the proposed model is good fit with the experimental data, and therefore it reflects the characteristics of the leaching processes in kinetics zone
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2000年第2期97-100,共4页
Journal of Fuel Chemistry and Technology
关键词
碱抽提
动力学
制备
模型建立
铜
催化剂
Raney Cu, catalyst preparation, alkali leaching kinetics
