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| 论文编号: |
122214O120120057 |
| 第一作者所在部门: |
301组 |
| 中文论文题目: |
XPS study on the change of carbon-containing groups and sulfur transformation on coal surface
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| 英文论文题目: |
XPS study on the change of carbon-containing groups and sulfur transformation on coal surface
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| 论文题目英文: |
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| 作者: |
刘粉荣
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| 论文出处: |
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| 刊物名称: |
燃料化学学报
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| 年: |
2011
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| 卷: |
39 |
| 期: |
2 |
| 页: |
81 |
| 联系作者: |
刘粉荣 |
| 收录类别: |
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| 影响因子: |
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| 摘要: |
Two Chinese coals, Liuzhi (LZ) and Zunyi (ZY), were pyrolyzed in a fixed bed reactor under N2 and H2 atmospheres from 400 to 700oC. X-ray Photoelectron Spectroscopy (XPS) was used to study the changes of carbon-containing groups and sulfur transformation on the surface of coals and their chars. Under N2 atmosphere, on the ZY chars surface, the contents of O=C–O, C–H or C–C groups have a decreasing trend and the one of C=O or O–C–O, C–O is increasing compared with that of raw coal at all temperatures. For LZ coal, the changes of O=C–O, C=O or O–C–O, C–O contents are similar to ZY coal, however the one of C–H and C–C content is contrary to that of ZY coal. Under H2 atmosphere, for ZY coal, not only O=C–O content, but also C=O and O–C–O, C–O contents have a decreasing trend, while C–H and C–C contents increase compared with raw coal; for LZ coal, except for C=O and O–C–O contents have a decreasing trend, and other carbonyl groups have the same trend as that under N2 atmosphere. And for these coals, with the temperature increasing, the S/C ratio on the char surface increases under N2 atmosphere, however the one decreases at the temperatures from 400oC to 600oC and increases much at 700oC under H2 atmosphere. This indicates that under both atmospheres, sulfur can transfer from inner to the surface during pyrolysis, but hydrogen can react with sulfur-containing radicals, so the S/C is lower than that under nitrogen. |
| 英文摘要: |
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| 备注: |
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