Flotation separation of Shenfu coal macerals and low temperature pyrolysis characteristics of different maceral concentrate

ZHAO Wei; ZHANG Xiao-qian; ZHOU An-ning; YANG Zhi-yuan

Volume 42 Issue 05

May 2014

Turn off MathJax

Article Contents

Article Navigation > Journal of Fuel Chemistry and Technology > 2014 > 42(05): 527-533

ZHAO Wei, ZHANG Xiao-qian, ZHOU An-ning, YANG Zhi-yuan. Flotation separation of Shenfu coal macerals and low temperature pyrolysis characteristics of different maceral concentrate[J]. Journal of Fuel Chemistry and Technology, 2014, 42(05): 527-533.

Citation:

ZHAO Wei, ZHANG Xiao-qian, ZHOU An-ning, YANG Zhi-yuan. Flotation separation of Shenfu coal macerals and low temperature pyrolysis characteristics of different maceral concentrate[J]. Journal of Fuel Chemistry and Technology, 2014, 42(05): 527-533.

Citation:

ZHAO Wei, ZHANG Xiao-qian, ZHOU An-ning, YANG Zhi-yuan. Flotation separation of Shenfu coal macerals and low temperature pyrolysis characteristics of different maceral concentrate[J]. Journal of Fuel Chemistry and Technology, 2014, 42(05): 527-533.

PDF( 3965 KB)

Flotation separation of Shenfu coal macerals and low temperature pyrolysis characteristics of different maceral concentrate

College of Chemistry & Chemical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China

Received Date: 2013-10-12
Rev Recd Date: 2014-01-24
Publish Date: 2014-05-30

Abstract

Abstract

The flotation separation of Shenfu coal macerals and the low temperature pyrolysis characteristics of its concentrates were carried out. The effect of pulp pH value on flotation separation and the impact of maceral enrichment ratio on low temperature pyrolysis were studied. A contrastive analysis was conducted on the characteristics of maceral concentrates in low temperature pyrolysis, providing theory guidance for classifying utilization of coal macerals. The results show that the separation effect of macerals can be manipulated through adjustment of pulp pH value. The more vitrinite exists in the coal sample, the higher the tar yield in low temperature pyrolysis is. But the more inertinite existing in the coal sample highers the semicoke yield. The surface of semicoke from vitrinite concentrates shows clear holes and cracks, and the semicoke structure of inertinite concentrates becomes more dispersive and fragile and an increase in small particles is found. Shenfu coal and its various macerals concentrates show a relative high content of phenols in its tar from low temperature pyrolysis. More phenols, naphthalenes and hydrocarbons exist in the tar from vitrinite concentrates, whereas more cyclophanes and benzenes are found in inertinite tar. The gas compositions of Shenfu coal and its concentrates in low temperature pyrolysis are CH₄, H₂, CO₂ and a bit of C_2~5. The relative cumulative yield of CH₄, H₂, and C_2~5 in low temperature pyrolysis gas from vitrinite concentrates is higher than those from inertinite, but the CO and CO₂ is lower than that from inertinite. The relative cumulative yield of CH₄ and H₂ is higher in pyrolysis gas of Shenfu raw coal than that from vitrinite and inertinite.
- coal maceral,
- flotation separation,
- low temperature pyrolysis,
- characteristic of fractions

FullText(HTML)

References(23)

References

RACHEL W, MARIA M. Functional group and individual maceral chemistry of high volatile bituminous coals from southern Indiana: Controls on coking[J]. Int J Coal Geol, 2004, 58(3): 181-191.

DAS T K. Thermogravimetric characterisation of maceral concentrates of Russian coking coals[J]. Fuel, 2001, 80(1): 97-106.

DAI H. Status of direct coal liquefaction research in China[J]. Energy, 1986, 11(11/12): 1225-1229.

SONIA H, ALFREDO G, GUILLERMO A, XIMENA G, CLAUDIA U. Coal blend combustion: Link between unburnt carbon in fly ashes and maceral composition[J]. Fuel Process Technol, 2003, 80(3): 209-223.

祁威, 舒新前, 王祖讷, 朱书全, 傅晓恒. 神府煤制水煤浆的研究[J]. 煤炭科学技术, 2003, 31(7): 34-35. (QI Wei, SHU Xin-qian, WANG Zu-ne, ZHU Shu-quan, FU Xiao-heng. Research on coal water mixture prepared with Shenfu coal[J]. Coal Science and Technology, 2003, 31(7): 34-35.)

HONAKER R Q, MOHANTY M K, CRELLING J C. Coal maceral separation using column flotation[J]. Miner Eng, 1996, 9(4): 449-464.

林治穆. 煤显微组分的浮选法分离及富集物燃烧性能[J]. 山东矿业学院学报, 1990, 9(1): 74-79. (LIN Zhi-mu. Separation of coal macerals (floation) and observation of coal combustion behavior[J]. Journal of Shandong Mining Institute, 1990, 9(1): 74-79.)

SHU X Q, WANG Z N, XU J Q. Separation and preparation of macerals in Shenfu coals by flotation[J]. Fuel, 2002, 81(4): 495-501.

HOWER J C, KUEHN K W, PAREKH B K, PETERS W J. Macerals and microlithotype beneficiation in column flotation at the Powell Mountain Coal Mayflower Preparation Plant, Lee County, Virginia[J]. Fuel Process Technol, 2000, 67(1): 23-33.

孙庆雷, 李文, 李保庆. 神木煤显微组分热解特性研究[J]. 中国矿业大学学报, 2001, 30(3): 272-276. (SUN Qing-lei, LI Wen, LI Bao-qing. Study on pyrolysis of maceal conentrate from Shenmu coal[J]. Journal of China University of Mining & Technology, 2001, 30(3): 272-276.)

孙庆雷, 李文, 李东涛, 陈皓侃, 李保庆, 白向飞, 李文华. 神木煤有机显微组分的结构特征与热转化性质的关系[J]. 燃料化学学报, 2003, 31(2): 97-102. (SUN Qing-lei, LI Wen, LI Dong-tao, LI Bao-qing, BAI Xiang-fei, LI Wen-hua. Relationship between structure characteristics and thermal conversion property of Shenmu maceral concentrates[J]. Journal of Fuel Chemistry and Technology, 2003, 31(2): 97-102.)

孙庆雷, 李文, 陈皓侃, 李保庆. 神木煤显微组分加氢热解特性的研究[J]. 燃料化学学报, 2002, 30(1): 12-15. (SUN Qing-lei, LI Wen, CHEN Hao-kan, LI Bao-qing. Study on hydropyrolysis of maceral from Shenmu coal[J]. Journal of Fuel Chemistry and Technology, 2002, 30(1): 12-15.)

常海洲, 曾凡桂, 李文英, 李美芬, 谢克昌. 煤及其显微组分热解过程中的半焦收缩动力学[J]. 物理化学学报, 2008, 24(4): 675-680. (CHANG Hai-zhou, ZENG Fan-gui, LI Wen-ying, LI Mei-fen, XIE Ke-chang. Semicoke contraction kinetics of coal and its macerals in pyrolysis[J]. Acta Physico-Chimica Sinica, 2008, 24(4): 675-680.)

林建英, 李文英, 常丽萍, 谢克昌. 煤岩有机显微组分热解过程中HCN和NH₃生产规律的研究[J]. 燃料化学学报, 2004, 32(6): 663-667. (LIN Jian-ying, LI Wen-ying, CHANG Li-ping, XIE Ke-chang. Studies on the formation of HCN and NH₃ during coal macerals pyrolysis[J]. Journal of Fuel Chemistry and Technology, 2004, 32(6): 663-667.)

王传格, 张妮, 陈燕. 煤显微组分结构特征及其与热解行为的关系[J]. 煤炭转化, 2011, 34(3): 11-16. (WANG Chuan-ge, ZHANG Ni, CHEN Yan. Relationship between structural characterization of macerals and their thermal behavior[J]. Coal Conversion, 2011, 34(3): 11-16.)

DAS T K. Evolution characteristics of gases during pyrolysis of maceral concentrates of Russian coking coals[J]. Fuel, 2001, 80(4): 489-500.

ZHAO Y P, HU H Q, JIN L J, HE X F, WU B. Pyrolysis behavior of vitrinite and inertinite from Chinese Pingshuo coal by TG-MS and in a fixed bed reactor[J]. Fuel Process Technol, 2011, 92(4): 780-786.

赵伟, 周安宁, 李远刚. 微波辅助磨矿对煤岩组分解离的影响[J]. 煤炭学报, 2011, 36(1): 140-144. (ZHAO Wei, ZHOU An-ning, LI Yuan-gang. The influence of microwave-assisted grinding on coal macerals dissociation[J]. Journal of China Coal Society, 2011, 36(1): 140-144.)

ZHAO W, YANG F S, LI Y G, QU J L, ZHOU A N. The influence of microwave treatment under a hydrogen or methane atmosphere on the flotability of the macerals in Shenfu coals[J]. Mining Science and Technology(China), 2011, 21(6): 761-766.

孙庆雷, 李文, 陈皓侃, 李保庆. 神木煤显微组分热解和加氢热解的焦油组成[J]. 燃料化学学报, 2005, 33(4): 412-415. (SUN Qing-lei, LI Wen, CHEN Hao-kan, LI Bao-qing. Composition of coal tar from pyrolysis and hydropyrolysis of Shenmu coal macerals[J]. Journal of Fuel Chemistry and Technology, 2005, 33(4): 412-415.)

赵伟, 周安宁, 曲建林. 光催化作用下丙酮改性对神府煤煤岩组分表面性质影响的研究[J]. 燃料化学学报, 2011, 39(8): 561-566. (ZHAO Wei, ZHOU An-ning, QU Jian-lin. Study of the influence of the macerals in Shenfu coals modified by acetone under photocatalysis on wettability[J]. Journal of Fuel Chemistry and Technology, 2011, 39(8): 561-566.)

何秀风, 陈小丽, 杜娟, 常丽萍. 宁夏原煤及其显微组分热解过程中气相产物生成的研究[J]. 煤化工, 2009, 37(2): 25-27. (HE Xiu-feng, CHEN Xiao-li, DU Juan, CHANG Li-ping. Study on the gaseous products generated during pyrolysis of Ningxia raw coal and its macerals[J]. Coal Chemical Industry, 2009, 37(2): 25-27.)

赵融芳, 黄伟, 常丽萍, 朱素渝, 谢克昌. 三种不同煤阶煤的模拟热解实验研究[J]. 煤炭转化, 2000, 23(4): 37-41. (ZHAO Rong-fang, HUANG Wei, CHANG Li-ping, ZHU Su-yu, XIE Ke-chang. Pyrolysis simulation of three kinds of coals[J]. Coal Conversion, 2000, 23(4): 37-41.)

Relative Articles

Supplements(0)

Cited By

Proportional views