文献类型：期刊文献

英文题名：Study on non-isothermal reaction and sintering kinetics of Ca(OH) 2 particle cluster dehydration with temperature distribution modification

作者：Gu, Yishi[1,2,3];Cheng, Yuxiang[1,2,3];Shen, Zhongjie[1,2,3];Lv, Feng[4];Wan, Dayang[5];Gao, Yongchuan[5];Duan, Yuezhang[5];Xu, Jianliang[1,2,3];Liang, Qinfeng[1,2,3];Guo, Xiaolei[1,2,3];Liu, Haifeng[1,2,3]

机构：[1]East China Univ Sci & Technol, Natl Energy Coal Gasificat Technol Res & Dev Ctr, POB 272, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, POB 272, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, Shanghai 200237, Peoples R China;[4]RUICHEN PETROCHEM, Shanghai 200233, Peoples R China;[5]Luoyang Ruichang Environm Engn Co Ltd, Luoyang 471027, Peoples R China

年份：2024

卷号：488

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20241515905257);WOS:【SCI-EXPANDED(收录号:WOS:001228482500001)】；

基金：This study is supported by the National Key R & D Program of China (2023YFB4104003-02) and the National Natural Science Foundation of China (22378130) .

语种：英文

外文关键词：Calcium hydroxide; Dehydration; Particle cluster evolution; Microstructure; Sintering kinetics

摘要：Dehydration, microstructure evolution, and sintering behaviors of Ca(OH) 2 particles are essential to the application of thermochemical energy storage technology. The current study established a method that combined the high -temperature stage with visualization and online temperature measurement technologies to investigate the non -isothermal reaction and sintering kinetics of Ca(OH) 2 particle cluster dehydration. The results showed that three stages can be obtained from the thermogravimetric measuring curves of the dehydration process for both AR-Ca(OH) 2 and I-Ca(OH) 2 samples. The non -isothermal reaction kinetic parameters were calculated with the FW -O method and compared with different heating rates. Temperature was found to be heterogeneously distributed on the particle cluster surface with a maximum difference of 50 degrees C during the dehydration process while the reaction front absorbed heat and reduced the temperature. Ca(OH) 2 particle cluster shrank during the heating process and the shrinkage ratio increased with the temperature. Low heating rate was found to cause a higher shrinkage ratio of Ca(OH) 2 particle cluster, which was up to 8 % after the dehydration reaction ended. Agglomerates appeared between particles when the temperature was 300 degrees C with pores found inside the particle cluster, and the size increased with the heating rate, while the sintering neck was found inside the particle cluster at 600 degrees C. Finally, with the modification of the measured temperature on the particle cluster surface, the sintering kinetics of the Ca(OH) 2 particle cluster were analyzed, and the interaction mechanism between dehydration, temperature and sintering was revealed.