低品质煤提质后快速热解大分子挥发分产物的析出特性

林振敏; 陈云; 王智化; 邹祥波; 黄镇宇; 刘建忠; 周俊虎; 岑可法

低品质煤提质后快速热解大分子挥发分产物的析出特性

1.
浙江大学能源清洁利用国家重点实验室, 浙江杭州 310027;
2.
浙江浙能北仑发电有限公司, 浙江宁波 315800;
3.
广东省粤电集团有限公司珠海发电厂, 广东珠海 519050

基金项目: 国家重点基础研究发展规划（973计划，2012CB214906）。

详细信息

通讯作者:
王智化，博士，教授，主要从事燃烧及污染控制方面的研究，E-mail：wangzh@zju.edu.cn。

中图分类号: TQ534
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出版历程
- 收稿日期: 2013-11-23
- 修回日期: 2014-02-19
- 刊出日期: 2014-06-30

Release characteristics of macromolecular volatile products during rapid pyrolysis of upgraded low-rank coals

1.
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China;
2.
Zhejiang Provincial Energy Group Company Ltd. Beilun Power Generation Co. Ltd, Ningbo 315800, China;
3.
Guangdong Yudean Group Co. Ltd. Zhuhai Power Plant, Zhuhai 519050, China

摘要

摘要: 对3种低品质煤进行200、250和300 ℃下的水热提质实验。将水热提质前后的煤样进行氮吸附测试和红外光谱测定，获得其孔隙分布和含氧官能团的变化规律。结果表明，水热提质后，各煤种平均孔径、比孔容明显降低，煤中羟基、羧基减少，环化程度升高，单环芳烃结构向多环芳烃转化，煤中有机质逐渐成熟，煤阶升高。利用快速热解仪在升温速率5 000 ℃/s、终温1 000 ℃条件下进行实验，获得低品质煤热解大分子挥发分的析出规律。结果表明，随着反应终温的升高，各煤种热解产生的脂肪烃含量减小、芳香烃的含量升高、酸类和酚类减少、酯类变化规律不明显。
- 低品质煤 /
- 水热提质 /
- 快速热解 /
- FT-IR /
- PY-GC/MS
Abstract: 3 low rank coals were dewatered and upgraded by hydrothermal process at 200, 250 and 300 ℃. Nitrogen adsorption measurements and FT-IR spectra of the parent and upgraded coals were performed to get the change of pore distribution and functional groups. After hydrothermal treatment, the average pore diameter and specific pore volume drop rapidly. The content of hydroxyl and carboxyl decreases and the cyclized degree increases. The monocyclic aromatics change into polycyclic aromatics and the organic matter in coal is gradually mature, which reflect the coal rank becomes higher. Then, rapid pyrolysis were carried out in a CDS5000 Pyroprobe accompanied by a GC/MS at 5 000 ℃/s, 1 000 ℃ to investigate the release characteristics of macromolecular volatile products of these coals. With the final reaction temperature increasing, the content of aliphatic hydrocarbon, acids and phenols decreases, that of aromatic hydrocarbon increases. The esters in coals have no obvious variation law.
- low-rank coal /
- hydrothermal treatment /
- rapid pyrolysis /
- FT-IR /
- PY-GC/MS

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