Mn-Fe<sub>2</sub>O<sub>3</sub>载氧体作用下CO化学链燃烧特性及动力学研究

李渠; 覃吴; 张俊姣; 程伟良; 董长青

Mn-Fe₂O₃载氧体作用下CO化学链燃烧特性及动力学研究

1.
华北电力大学生物质发电成套设备国家工程实验室, 北京 102206;
2.
华北电力大学能源动力与机械工程学院, 北京 102206

基金项目: 国家自然科学基金（51206044）。

详细信息

通讯作者:
覃吴（1982- ），男，讲师，E-mail：qinwugx@126.com。

中图分类号: TQ546
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- 文章访问数: 653
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- 被引次数: 0
出版历程
- 收稿日期: 2014-04-15
- 修回日期: 2014-06-10
- 刊出日期: 2014-08-30

Characteristics and kinetics of chemical looping combustion of Mn-doped Fe₂O₃ oxygen carrier with CO

1.
National Engineering Laboratory for Biomass Power Generation Equipment, School of Renewable Energy Engineering, North China Electric Power University, Beijing 102206, China;
2.
School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China

摘要

摘要: 采用共沉淀法制备不同物质的量比Mn掺杂的铁基载氧体（Mn-Fe₂O₃），并进行XRD、BET和TEM表征。开展不同温度下Mn-Fe₂O₃与CO的化学链燃烧实验，研究载氧体的反应特性，确定较优的掺杂量和反应温度。结果表明，适量的Mn掺杂有助于改善铁基载氧体的反应活性，Fe：Mn物质的量为50：1时燃烧反应转化率最高。多循环化学链燃烧实验证实了载氧体稳定性较好。不同升温速率（30、40、50 ℃/min）下反应动力学分析表明，Mn-Fe₂O₃与CO的化学链燃烧还原反应均属于随机成核和随后生长的Avrami-Erofeev方程模型，并依据模型分别计算出了该模型的活化能和频率因子。
- 化学链燃烧 /
- Fe₂O₃载氧体 /
- Mn /
- CO /
- CO₂富集
Abstract: Mn-doped Fe₂O₃ oxygen carriers with different molar ratios of Fe to Mn were prepared by co-precipitation method, which were characterized by XRD, BET and TEM. Chemical looping combustion tests between Mn-Fe₂O₃ and CO at different temperatures were performed to investigate the reaction characteristics, and to determine the optimized Mn doping amount and reaction temperature. The results reveal that a rational Mn doping could enhance the reactivity of iron-base oxygen carrier, and the optimal Fe/Mn molar ratio is 50. Multi-cycle experiments confirm the high stability of the optimized oxygen carrier. Furthermore, the reaction kinetic analysis at heating rates of 30, 40, 50 ℃/min shows that the Avrami-Erofeev model is suitable for the reactions, and the activation energy and pre-exponential factor can be calculated according to the kinetic model.
- chemical looping combustion /
- Fe₂O₃ oxygen carrier /
- Mn /
- CO /
- CO₂-capture

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