先锋褐煤的热处理和水热处理改质

王知彩; 潘春秀; 任世彪; 雷智平; 王晓玲; 水恒福

先锋褐煤的热处理和水热处理改质

安徽工业大学化学与化工学院安徽省煤洁净转化与利用重点实验室, 安徽马鞍山 243002

基金项目: 国家自然科学基金(21476004, 21476003, 21476002, 21306001, U1361125)); 国家自然科学基金重点项目(U1261208); 安徽省科技创新团队项目。

详细信息

通讯作者:
王知彩,博士,教授,Tel:13955530691,E-mail:zhicaiw@ahut.edu.cn。

中图分类号: TQ534.2
计量
- 文章访问数: 397
- HTML全文浏览量: 19
- PDF下载量: 396
- 被引次数: 0
出版历程
- 收稿日期: 2015-05-10
- 修回日期: 2015-07-10
- 刊出日期: 2015-09-30

Modification of Xianfeng lignite by thermal treatment and hydrothermal treatment

School of Chemistry and Chemical Engineering, Anhui University of Technology, Anhui Key Laboratory of Clean Coal Conversion & Utilization, Ma'anshan 243002, China

摘要

摘要: 通过先锋褐煤热处理和水热处理,结合处理煤结构与性质表征,研究了热处理和水热处理对先锋褐煤结构、抽提和溶胀性能的影响,探讨了热处理过程水的作用。结果表明,低于热解温度下的热处理以非共价键解缔合及部分弱共价键热解为主,水与煤的水热反应能够抑制水热处理过程中煤的热解和小分子化合物释放。高温热处理以热解和脱氧为主,水热反应可以稳定煤热解活性基团,避免其二次裂解和交联,在一定程度上提高处理煤的混合溶剂抽提率,改善其溶胀性能。
- 先锋褐煤 /
- 热处理 /
- 水热处理 /
- 结构表征
Abstract: Modification of low rank coal by thermal treatment is the key to its high-efficiency conversion and utilization. In this paper, the thermal treatment and hydrothermal treatment of Xianfeng lignite were carried out. By combination of the characterizations of structure and properties of treated coals, the modification of thermal treatment and the interaction of water in the hydrothermal process were investigated. The results indicate that the disassociation of non-covalent bonds and the pyrolysis of weak covalent bonds dominate in the treatment process below the pyrolystic temperature of lignite. The hydrothermal reaction can inhibit the pyrolysis of coal matrix and the release of small molecular compounds in the process of hydrothermal treatment. At higher than the pyrolysis of lignite, the thermal treatment shows obvious pyrolysis and deoxygenation. The hydrothermal reaction can provide active hydrogen to stabilize the pyrolysis fragment and avoid the secondary pyrolysis and condensation, so that the extraction and swelling properties of hydrothermal treated coal in mixed solvent were improve at certain extent.
- Xianfeng lignite /
- thermal treatment /
- hydrothermal treatment /
- structural characterization

HTML全文

参考文献(15)

RUYTER H P, van RAAM L, van der POEL H. Upgrading of wake field brown coal from south Australia[J]. Fuel Process Technol, 1984, 9(2): 163-171.

LIU X, LI B, MIURA K. Analysis of pyrolysis and gasification reactions of hydrothermally and supercritically upgraded low-rank coal by using a new distributed activation energy model[J]. Fuel Process Technol, 2001, 69(1): 1-12.

FAVAS G, JACKSON W R. Hydrothermal dewatering of lower rank coals. 2. Effects of coal characteristics for a range of Australian and international coals[J]. Fuel, 2003, 82(1): 59-69.

常鸿雁, 徐文娟, 张德祥, 高晋生. 加压水蒸气下年轻煤脱氧改质的研究[J]. 煤炭转化, 2005, 28(1): 25-29. (CHANG Hong-yan, XU Wen-juan, ZHANG De-xiang, GAO Jin-sheng. Study on the deoxy-modification of low rank coals under pressurized vapour conditions[J]. Coal Conv, 2005, 28(1): 25-29 )

TIMPE R C, MANN M D, PAVLISH J H, LOUIE P K K. Organic sulfur and hap removal from coal using hydrothermal treatment[J]. Fuel Process Technol, 2001, 37: 127-141.

郭延红, 王维周, 张东亮. 低温热改质煤对煤-油-水三元料浆成浆性的影响[J]. 煤炭转化, 2005, 28(2): 53-55 (GUO Yan-hong, WANG Wei-zhou, ZHANG Dong-liang. Effect on slurry ability of cows about modified coal[J]. Coal Conv, 2005, 28(2): 53-55.)

SHUI H, LI H, CHANG H, WANG Z, GAO Z, LEI Z, REN S. Modification of sub-bituminous coal by steam treatment: Caking and coking properties[J]. Fuel Process Technol, 2011, 92(12): 2299-2304.

WANG Z, SHUI H, PEI Z, GAO J. Study on the hydrothermal treatment of Shenhua coal[J]. Fuel, 2008, 87(4/5): 527-533.

水恒福, 裴占宁, 王知彩. 水热处理对神华煤液化性能的影响[J]. 燃料化学学报, 2007, 35(6): 655-659. (SHUI Heng-fu, PEI Zhan-ning, WANG Zhi-cai. Effect of hydrothermal treatment on the hydroliquefaction property of Shenhua coal[J]. J Fuel Chem Technol, 2007, 35(6): 655-659.)

王知彩, 水恒福, 张德祥, 高晋生. 水热处理对神华煤质的影响[J]. 燃料化学学报, 2006, 34(5): 524-529. (WANG Zhi-cai, SHUI Heng-fu, ZHANG De-xiang, GAO Jin-sheng. Effect of hydrothermal treatment on some properties of Shenhua coal[J]. J Fuel Chem Technol, 2006, 34(5): 524-529.)

SHUI H, NORINAGA K, IINO M. Effect of tetrabutylammonium acetate addition on the aggregation of coal molecules at solution and solid states[J].Energy Fuels, 2001, 15(2): 487-491.

PAINTER P C, SOBKOWIAK M, YOUTCHEFF J. FT-IR study of hydrogen bonding in coal[J]. Fuel, 1987, 66(7): 973-978.

TAKANOHASHI T, TERAO Y, IION M. Irreversible structural changes in coals during heating[J]. Energy Fuels, 1999, 13(2): 506-512.

SHUI H, WANG Z, WANG G. Effect of hydrothermal treatment on the extraction of coal in the CS₂/NMP mixed solvent[J]. Fuel, 2006, 85(12/13): 1798-1802.

TSE D S, HIRSCHON A S, MALHOTRA R, MCMILLEN D F, ROSS D S. Effect of hydrothermal pretreatment for coprocessing[J]. Prepr Pap-Am Chem Soc, Div Fuel Chem, 1991, 36(1): 23-28.

施引文献

资源附件(0)

访问统计