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| 论文编号: |
122214O120110101 |
| 第一作者所在部门: |
902组 |
| 中文论文题目: |
Hydrogen production by methane cracking over different coal chars
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| 英文论文题目: |
Hydrogen production by methane cracking over different coal chars
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| 论文题目英文: |
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| 作者: |
张东柯
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| 论文出处: |
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| 刊物名称: |
Fuel
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| 年: |
2011
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| 卷: |
90 |
| 期: |
11 |
| 页: |
3473 |
| 联系作者: |
张东柯 |
| 收录类别: |
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| 影响因子: |
3.604
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| 摘要: |
Hydrogen production by methane cracking over a bed of different coal chars has been studied using a
fixed bed reactor system operating at atmospheric pressure and 1123 K. The chars were prepared by pyrolysing
four parent coals of different ranks, namely, Jincheng anthracite, Binxian bituminous coal, Xiaolongtan
lignite and Shengli lignite, in nitrogen in the same fixed bed reactor operating at different
pyrolysis temperatures and times. Hydrogen was the only gas-phase product detected with a GC during
methane cracking. Both methane conversion and hydrogen yield decreased with increasing time on
stream and pyrolysis temperature. The lower the coal rank, the greater the catalytic effect of the char.
While the Shengli lignite char achieved the highest methane conversion and hydrogen yield in methane
cracking amongst all chars prepared at pyrolysis temperature of 1173 K for 30 min, a higher catalytic
activity was observed for the Xiaolongtan lignite char prepared at 973 K, indicating the importance of
the nature of char surfaces. The catalytic activity of the coal chars were reduced by the carbon deposition.
The coal chars had legible faces and sharp apertures before being subjected to methane cracking. The surfaces
and pores of coal chars were covered with carbon deposits produced by methane cracking as evident
in the SEM images. The results of BET surfaces areas of the coal chars revealed that the presence
of micropores in the chars was not an exclusive reason for the catalytic effect of the chars in methane
cracking. |
| 英文摘要: |
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| 备注: |
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