燃料化学学报2012，Vol.40Issue(8)：927-934,8.
基于钾基修饰铁矿石载氧体的煤化学链燃烧循环实验
Cycle experiments on chemical looping combustion of coal using potassium-improved iron ore as oxygen carrier
摘要
Abstract
The cycle experiments on chemical looping combustion of coal were carried out in a fluidized bed using a K-promoted iron ore as oxygen carrier. The continued effect of the K-promoted iron ore on the gas compositions, fractions of carbonaceous gases was investigated. The results showed that the reaction time was shortened by the K-promoted iron ore, and that the CO2 concentration was significantly increased. The CO2 fraction for the K-promoted iron ore was much higher than that for the iron ore whereas, the CO fraction was much lower during 20 cycles. After 11 cycles, the CO2 fraction slightly decreased with a slight increase in CO fraction for the K-promoted iron ore. The reduced oxygen carriers after different cycles were characterized by SEM-EDS (Scanning Electron Microscope-Energy Dispersive Spectrometer) and XRD (X-ray diffraction). Compared with pure iron ore, the K-promoted iron ore showed serious sinter on the oxygen carrier particles during the first 11 cycles. The oxygen carrier, however, re-obtained the porous structure after 20 cycles due to the loss of potassium. The XRD showed that the KFe11O17 or its derivatives displayed the catalytic effect on coal gasification in the process of chemical looping combustion and the oxygen carrier could be regenerated to Fe2O3 after 20 cycles.关键词
钾/铁矿石/煤/化学链燃烧Key words
potassium/iron ore/coal/chemical looping combustion分类
能源科技引用本文复制引用
顾海明,沈来宏,肖军,张思文,宋涛..基于钾基修饰铁矿石载氧体的煤化学链燃烧循环实验[J].燃料化学学报,2012,40(8):927-934,8.基金项目
国家自然科学基金(50976023) （50976023）
江苏省科技支撑计划(BE2012166) （BE2012166）
东南大学优秀博士学位论文基金(YBJJ1206). （YBJJ1206）
