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| 论文编号: |
122214O120130247 |
| 第一作者所在部门: |
101组 |
| 中文论文题目: |
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| 英文论文题目: |
Effects of CO2 Atmosphere and K2CO3 Addition on the Reduction Reactivity, Oxygen Transport Capacity, and Sintering of CuO and Fe2O3 Oxygen Carriers in Coal Direct Chemical Looping Combustion
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| 论文题目英文: |
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| 作者: |
余钟亮
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| 论文出处: |
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| 刊物名称: |
Energy Fuels
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| 年: |
2013
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| 卷: |
27 |
| 期: |
5 |
| 页: |
2703-2711 |
| 联系作者: |
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| 收录类别: |
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| 影响因子: |
2.853
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| 摘要: |
Chemical looping combustion (CLC) of coal has received increasing interest in recent years. However, few
attempts have been made to examine the effects of CO2 atmosphere and K2CO3 addition on the reduction rate, the oxygen
transport capacity (OTC), and the sintering of the oxygen carrier when coal is used directly in CLC. In this work, these issues for
Fe2O3 and the CuO oxygen carriers were investigated by thermogravimetric analysis (TGA), X-ray diffraction (XRD), field emission
scanning electron microscopy (FESEM), and inductively coupled plasma？atomic emission spectrometry (ICP-AES). The TGA
results indicate that the reduction rates can be increased by either the CO2 atmosphere or the K2CO3 additive due to the enhanced
CO2 gasification of coal char. Detailed analyses demonstrate that the CO2 atmosphere affects the OTC and the sintering of the
oxygen carrier by thermodynamic restrictions. The CO2 atmosphere has no effect on the OTC of the CuO oxygen carrier, and there
are no significant differences in sintering between the residues obtained under CO2 and N2 atmospheres. However, the CO2
atmosphere limits the OTC of the Fe2O3 oxygen carrier within the transformation Fe2O3？Fe3O4, and the sintering could be
moderated because of the higher sintering resistance of Fe3O4. The K2CO3 addition does not affect the OTC because the catalyst
has no impact on the equilibrium but promotes the sintering of the oxygen carrier due to its low Tammann temperature. Although
severe sintering could be caused by the K2CO3 addition, the catalytic effect can be observed during several redox cycles. |
| 英文摘要: |
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| 外单位作者单位: |
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| 备注: |
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关闭窗口 |
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