摘要
通过实验方法研究饱和氢氧化钙溶液与CO_2反应结晶生成碳酸钙沉淀的过程.研究不同操作条件对体积传质系数、反应结晶速率以及产品最终粒度分布的影响.实验结果表明:气液体积传质系数随着搅拌速率与气体流量的增加而增加;反应结晶速率随着搅拌速率、气体流量与CO_2体积分数的增加而增加;而晶体平均尺寸随着搅拌速率和CO_2体积分数的增加而降低;气体流量对晶体的粒度分布无显著影响.碳酸钙晶体同时存在生长与聚并现象.
This experiment studied the reactive crystallization of calcium hydroxyl solution and carbon dioxide. The influ-ence of different operating conditions on the volumetric mass transfer coefficient（kLa）, reactive crystallization rate（RC）and final crystal size distribution were investigated. The stirring rate and gas flow rate can improve kLa and Rc. The mean crystal size（dp）decreased by increasing the stirring rate and gas volume fraction. The gas flow rate did not affect dp. Crystal growth and agglomeration coexisted during the gas-liquid reactive crystallization.
出处
《天津科技大学学报》
CAS
北大核心
2017年第1期43-47,共5页
Journal of Tianjin University of Science & Technology
关键词
反应结晶
体积传质系数
粒度分布
reactive crystallization
volumetric mass transfer coefficient
crystal size distribution
