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| 论文编号: |
122214O120110125 |
| 第一作者所在部门: |
301组 |
| 中文论文题目: |
原位漫反射新方法研究煤中氢键的分解动力学
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| 英文论文题目: |
Decomposition kinetics of hydrogen bonds in coal by a new method of in-situ diffuse reflectance FT-IR
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| 论文题目英文: |
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| 作者: |
李文
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| 论文出处: |
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| 刊物名称: |
journal of fuel chemistry and technology
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| 年: |
2011
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| 卷: |
39 |
| 期: |
5 |
| 页: |
321 |
| 联系作者: |
李文 |
| 收录类别: |
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| 影响因子: |
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| 摘要: |
The kinetics of decomposition of hydrogen bonds in a Chinese lignite was studied using a new method of in-situ diffuse
reflectance FT-IR (DRIFT) with pulverized coal samples directly. In addition, a new experimental technique in DRIFT measurement to
avoid the condensation of volatile matter at high temperatures was introduced and used in this work. Based on two hypotheses, the
single reaction model is used to calculate kinetic parameters for decomposition of hydrogen bonds (except OH–？？) in coal heated up to
560°C. The results show that the decomposition of carboxylic acid dimers, OH–N and SH–N follows the second order reaction, while
the decomposition of OH–OR2, tightly bound hydroxyl tetramers and self-associated hydroxyls follows the first order reaction. The
calculated activation energies of some hydrogen bonds agree well with those obtained with other methods in references. Among the six
types of hydrogen bonds studied, the decomposition of carboxylic acid dimers, OH–N, SH–N and tightly bound hydroxyl tetramers can
be divided into two stages (230–380°C and 380–500°C), while that of OH–OR2 and self-associated hydroxyl groups can be treated as
only one stage. Moreover, the mechanism of decomposition of tightly bound hydrogen bond was suggested based on the comparison of
decomposition activation energy of self-associated OH with its bond strength in references. |
| 英文摘要: |
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