化工学报2013，Vol.64Issue(1)：289-296,8.DOI:10.3969/j.issn.0438-1157.2013.01.032
微型流化床反应分析及其对煤焦气化动力学的应用
Micro fluidized bed reaction analysis and its application to coal char gasification kinetics
摘要
Abstract
After summarizing the newly developed micro-fluidized bed reaction analysis (MFBRA) and its existing applications, its application to the kinetics of isothermal gasification reaction between coal char and CO2 /steam were further extended. The resulting kinetic data were compared with the measurements in thermogravimetric analyzer (TGA). Under minimized limitations of heat and mass transfer, the activation energy of char gasification with CO2 and steam in the kinetically controlled low temperature region was very close to that obtained from TGA, validating the reliability of MFBRA for the analysis of char gasification kinetics. Moreover, the temperature range of the kinetically controlled reaction region was found to be obviously wider in MFBRA than in TGA for both char-CO2 and char-steam reactions. At higher temperatures with evident limitations of heat and mass transfer on the reaction kinetics, the estimated activation energy was obviously higher with MFBRA than that with TGA. All of these further demonstrated that the diffusion limitation in MFBRA was weaker than that in TGA for gasification of coal char.关键词
微型流化床/热重/半焦气化/反应动力学/等温反应Key words
MFBRA/thermogravimetric analyzer/char gasification/reaction kinetics/isothermal reaction分类
化学化工引用本文复制引用
曾玺,王芳,韩江则,张聚伟,刘云义,汪印,余剑,许光文..微型流化床反应分析及其对煤焦气化动力学的应用[J].化工学报,2013,64(1):289-296,8.基金项目
国家重点基础研究发展计划项目(2011CB201304) （2011CB201304）
科技部重大仪器专项(2011YQ120039) （2011YQ120039）
国家自然科学基金项目(21106156,21006110,21076217,51174283) （21106156,21006110,21076217,51174283）
中国科学院战略性先导科技专项"低阶煤清洁高效梯级利用关键技术与示范"(XDA07010100). （XDA07010100）
