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基于钾基修饰铁矿石载氧体的煤化学链燃烧循环实验

顾海明,  沈来宏,  肖军,  张思文,  宋涛

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文章导航 > 燃料化学学报（中英文）  > 2012 >  (08): 927-934
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（中英文）, 2012, (08): 927-934.
引用本文: 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（中英文）, 2012, (08): 927-934.
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GU Hai-ming, SHEN Lai-hong, XIAO Jun, ZHANG Si-wen, SONG Tao. Cycle experiments on chemical looping combustion of coal using potassium-improved iron ore as oxygen carrier[J]. Journal of Fuel Chemistry and Technology, 2012, (08): 927-934.
Citation: GU Hai-ming, SHEN Lai-hong, XIAO Jun, ZHANG Si-wen, SONG Tao. Cycle experiments on chemical looping combustion of coal using potassium-improved iron ore as oxygen carrier[J]. Journal of Fuel Chemistry and Technology, 2012, (08): 927-934.
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基于钾基修饰铁矿石载氧体的煤化学链燃烧循环实验

  • 东南大学 能源热转换及其过程测控教育部重点实验室, 江苏 南京 200096

基金项目: 国家自然科学基金(50976023); 江苏省科技支撑计划(BE2012166); 东南大学优秀博士学位论文基金(YBJJ1206)。
详细信息
    通讯作者:

    沈来宏(1965-), 男, 教授, 主要研究方向为洁净煤燃烧、生物质能利用, E-mail: lhshen@seu.edu.cn, Tel: 025-83795598, Fax:025-57714489.

  • 中图分类号: TK546

Cycle experiments on chemical looping combustion of coal using potassium-improved iron ore as oxygen carrier

  • Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China

    摘要
  • 摘要: 对天然的铁矿石加以钾基修饰,在流化床上进行了煤化学链燃烧循环实验。研究了改性后的铁矿石对气体产物浓度及含碳气体体积分数影响的持续力。钾基铁矿石缩短了反应时间并明显提高了CO2浓度;在20次循环中,钾基铁矿石能明显提高CO2体积分数并降低CO体积分数,11次循环后,CO2体积分数稍有减少,CO体积分数略有增加。借助于扫描电镜与电子能谱(SEM-EDX)和X射线衍射(XRD),对不同循环后的载氧体进行表征。与纯铁矿石相比,前10次循环钾基铁矿石载氧体表面严重烧结,20次循环之后烧结减轻,恢复多孔结构。结果表明,钾基铁矿石载氧体中KFe11O17或其衍生物对煤气化有催化作用;在20次循环中存在钾流失现象;20次循环后钾基铁矿石载氧体能完全氧化为Fe2O3。
    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.
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出版历程
  • 收稿日期:  2011-10-19
  • 修回日期:  2011-12-27
  • 刊出日期:  2012-08-31

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