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| 论文编号: |
122214O120130006 |
| 第一作者所在部门: |
301组 |
| 中文论文题目: |
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| 英文论文题目: |
Mineral Transformation in Char and Its Effect on Coal Char
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| 论文题目英文: |
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| 作者: |
马志斌
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| 论文出处: |
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| 刊物名称: |
Energy & Fuel
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| 年: |
2013
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| 卷: |
27 |
| 期: |
8 |
| 页: |
4545-4554 |
| 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: |
The mineral transformation in the ash, slow pyrolysis char, and partially gasified char at high temperatures were
investigated in this part by XRD and SEM-EDX. All the mineral transformations possibly affecting gasification were considered.
The results show that the mineral transformation in slow pyrolysis char greatly differs from that in high temperature ash (950？
1500 °C). The predominant minerals in slow pyrolysis char and high temperature ash are oldhamite and gehlenite, respectively.
The crystalline mineral disappears in ash above 1300 °C while it still exists in the char even at 1500 °C. In the char, anhydrite is
reduced by carbon to oldhamite at high temperature and increasing pyrolysis temperature is beneficial for the formation of
oldhamite. It is verified that the presence of char impedes the formation of aluminosilicates and thus the catalytic minerals remain
in char even at 1500 °C. However, the oldhamite in char also transforms to gehlenite during char gasification with the presence of
CO2. The carbon thermal reaction is proved to be feasible only under inert atmosphere rather than reducing atmosphere in this
study. Besides, morphology of minerals in char at high temperature is characterized. Considering the interaction between
minerals and coal matrix, it is not adequate to evaluate the mineral transformation during gasification by only using ash. |
| 英文摘要: |
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| 外单位作者单位: |
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