热态半焦和冷态半焦催化裂解煤焦油研究

刘殊远; 汪印; 武荣成; 曾玺; 许光文

热态半焦和冷态半焦催化裂解煤焦油研究

1.
中国科学院过程工程研究所多相复杂系统国家重点实验室, 北京 100190;
2.
中国科学院大学, 北京 100049;
3.
中国科学院城市环境研究所, 福建厦门 361021

基金项目: 国家自然科学基金(51176197);国家科技支撑项目(2012BAC03B05, 2010BAC66B01)。

详细信息

通讯作者:
汪印、许光文, Tel: 010-82544886, E-mail: yinwang@iue.ac.cn, gwxu@home.ipe.ac.cn。

中图分类号: TQ056.1
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出版历程
- 收稿日期: 2012-12-24
- 修回日期: 2013-02-28
- 刊出日期: 2013-09-30

Research on coal tar catalytic cracking over hot in-situ chars

1.
State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China;
3.
Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China

摘要

摘要: 对比研究了热态半焦(原位热解半焦)和冷态半焦(热解后温度降至常温的半焦)对煤焦油的催化裂解特性。结果表明,相同条件下,热态煤半焦比冷态煤半焦具有更高的催化裂解焦油能力。当裂解温度为1 100 ℃,热解气体在热态半焦层中的停留时间为1.2 s时,催化裂解后燃气中焦油含量可降至100 mg/m³。BET分析结果表明,热态半焦比冷态半焦具有更大的比表面积和更发达的微孔结构。同时,在不可避免经历相对明显的高温过程中,冷态半焦的碳微晶结构有序度增加,进而导致其活性有所降低。随着气体停留时间的延长或催化裂解温度的提高,燃气中焦油含量迅速降低,但热态半焦与冷态半焦催化裂解焦油的活性差异也变小。半焦催化裂解焦油后,活性明显降低,但使这种半焦与水蒸气发生部分气化反应后,其活性基本得到恢复。
- 热态半焦 /
- 冷态半焦 /
- 焦油 /
- 催化裂解
Abstract: A comparison of coal tar catalytic cracking over hot char from in-situ coal pyrolysis and cooling char was investigated. The results show that the in-situ char has a higher capability of removing tar than the cooling char under the same reaction conditions. The tar content in the product gas is reduced to as low as 100 mg/m³ when the temperature of the in-situ char bed and the gas residence time in the bed are 1 100 ℃ and 1.2 s, respectively. BET analysis shows that the in-situ char has larger specific surface area and more micro pores than the cooling char, while the uniformity of the carbon crystallite structure in the cooling char increases, causing the decrease of the char's catalytic activity for tar removal. With the increase of gas residence time in the char bed or of cracking temperature, the tar content in the product gas decreases greatly, while the difference of catalytic activity for tar cracking between in-situ char and cooling char also decreases. The activity of the spent char is decreased significantly. However, the activity of the spent char can be basically recovered when it is partially gasified with steam.
- hot char /
- cold char /
- tar /
- catalytic cracking

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参考文献(26)

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热态半焦和冷态半焦催化裂解煤焦油研究

通讯作者:
汪印、许光文, Tel: 010-82544886, E-mail: yinwang@iue.ac.cn, gwxu@home.ipe.ac.cn。

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Research on coal tar catalytic cracking over hot in-situ chars

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热态半焦和冷态半焦催化裂解煤焦油研究

通讯作者: 汪印、许光文, Tel: 010-82544886, E-mail: yinwang@iue.ac.cn, gwxu@home.ipe.ac.cn。

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出版历程

Research on coal tar catalytic cracking over hot in-situ chars

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出版历程

目录

2023年《燃料化学学报（中英文）》评优结果公布！

通讯作者:
汪印、许光文, Tel: 010-82544886, E-mail: yinwang@iue.ac.cn, gwxu@home.ipe.ac.cn。