LI Jiarong1, 2 ， ZHU Jianguo1, 2 ， ZHU Shujun1, 2 ， LIU Jingzhang2 ， LI Baihang2
（1. University of Chinese Academy of Sciences， Beijing 100049， China； 2. Institute of Engineering Thermophysics， Chinese Academy of Sciences ， Beijing 100190， China）
Abstract：The calcium carbonate decomposition test was conducted on an isothermal multi-atmosphere vertical tube combustion test platform. The sample was instantly heated up to the operating temperature after being pushed into the furnace.Through the analysis of the weight loss curve of the sample, it can be found that in the rapid heating condition the temperature has great influence on the decomposition reaction of calcium carbonate. Furthermore, the temperature has greater influence in the lower temperature range (950～1 000 ℃) than in the higher range (1 000～1 100 ℃) . By comparing several kinetic models, the most probable kinetic model of calcium carbonate decomposition at CO2-N2 and pure N2 under rapid heating condition is random nucleation and growth model (n=1/3) . The activation energy values of calcium carbonate decomposition reaction are 207.741 and 203.786 kJ/mol respectively. The results show that CO2 inhibits the decomposition of calcium carbonate in the precalciner and it will prolong the complete decomposition time of calcium carbonate.
Keywords：calcium carbonate; high-temperature decomposition; kinetic model; activation energy
文章编号：1008-5548（2018）06-0001-07
DOI：10.13732/j.issn.1008-5548.2018.06.001
收稿日期：2018-07-16， 修回日期：2018-10-22，在线出版时间：2018-12-17。
基金项目：国家重点研发计划项目，编号：2016YFB0601503。
第一作者简介：李佳容（1993—），女，硕士研究生，研究方向为工业窑炉洁净燃烧技术。E-mail ：lijiarong@iet.cn。
通信作者简介：朱建国（1977—），男，博士，副研究员，硕士生导师，研究方向为煤炭洁净燃烧技术。E-mail ：zhujianguo@iet.cn。
