旋转填充床新型反应器中合成纳米CaCO_3过程特性研究  

STUDY ON THE PROCESS OF SYNTHESIS OF NANOMETER POWDER OF CaCO 3 IN A NOVEL ROTATING PACKED BED REACTOR

作　　者：王玉红[1] 陈建峰[1] 贾志谦[1] 郑冲[1] 

机构地区：[1]北京化工大学超重力工程技术研究中心

出　　处：《化学反应工程与工艺》1997年第2期141-146,共6页Chemical Reaction Engineering and Technology

摘　　要：利用ｐＨ计及电导率仪跟踪Ｃａ（ＯＨ）２在旋转填充床新型反应器中的碳化过程，并探讨了Ｇ／Ｌ、Ｎ、Ｔ、Ｃａ（ＯＨ）２初始浓度等操作参数对碳化反应过程的影响。结果表明：Ｃａ（ＯＨ）２与ＣＯ２碳化反应生成ＣａＣＯ３过程中，反应前期，过程速率受ＣＯ２吸收传质控制，反应后期受Ｃａ（ＯＨ）２的溶解控制，且吸收传质控制为整个过程的关键步骤；Ｇ／Ｌ、Ｎ、Ｔ、Ｃａ（ＯＨ）２初始浓度等操作参数均影响碳化反应时间、产品粒径及粒径分布；利用旋转填充床新型反应器制备出平均体积当量直径为１５～４０ｎｍ。The carbonation of lime suspension was measured in a novel rotating packed bed reactor by using pH meter and conductometer, and the effects of G/L,N,T and initial concentration of Ca(OH) 2 on the carbonation were studied. The results show that the carbonation rate is controlled by the absorption of CO 2 at the initial period, which is the most important stage in the whole process. Finally, it turned to be controlled by dissolution of Ca(OH) 2. The carbonation time, particle size and size distribution of CaCO 3 of mean size of 15～40nm and very narrow size distribution were produced by using a novel rotating packed bed reactor.

关 键 词：旋转填充床 反应器 碳酸钙粒子 粒径分布 纳米级 

分 类 号：O614.231[理学—无机化学] TQ132.32[理学—化学]