文献类型：会议论文

英文题名：Determination of metastable zone width of potassium sulfate in aqueous solution by ultrasonic sensor and FBRM

作者：Luo, Mengjie[1,2];Liu, Chenglin[1];Xue, Jin[1,2];Li, Ping[2];Yu, Jianguo[1,2]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem, Shanghai 200237, Peoples R China

会议论文集：3rd Symposium of the Asian-Crystallization-Technology-Society (ACTS)

会议日期：MAY 25-27, 2016

会议地点：Tianjin, PEOPLES R CHINA

语种：英文

外文关键词：Metastable zone; Nucleation kinetics; Potassium sulfate; FBRM; Ultrasonic velocity sensor

摘要：The metastable zone width (MSZW) and nucleation kinetics of potassium sulfate in the aqueous solution were investigated. MSZW was measured using both the ultrasonic velocity sensor and the focused beam reflectance measurement (FBRM) at different cooling rate, stirring rate and impurities concentration (aluminum ions and silicon ions), and the effects of these conditions on MSZW were discussed in details. In addition, the accuracy and sensitivity of detectors to measure the nucleation temperature of potassium sulfate in the aqueous solution were compared between the ultrasonic velocity sensor and FBRM over a wider range of operating conditions. Although two detectors measured MSZW with an acceptable accuracy, the ultrasonic velocity sensor had a higher sensitivity to the phase transition of potassium sulfate in solution since it directly detected the concentration change of potassium sulfate in solution. Furthermore, both self-consistent Wylt-like equation method and classical 3D nucleation theory approach were applied to estimate MSZW of potassium sulfate in aqueous solution. According to these classical theories, the nucleation kinetics parameters were calculated based on the measured MSZW data for potassium sulfate aqueous solution with 40 degrees C, 50 degrees C and 60 degrees C saturation temperature, respectively. It was found two approaches could describe MSZW of potassium sulfate aqueous system very well. (C) 2016 Elsevier B.V. All rights reserved.