Investigation on structural evolution and thermal reaction of coal-based graphite from Xinhua County, Hunan Province
-
摘要: 为了探究煤系石墨形成过程中结构演化及不同石墨化程度无烟煤和石墨的热反应行为，选取湖南新化系列变质程度无烟煤和煤系石墨为研究对象，通过X射线衍射（XRD）和高分辨率透射电子显微镜（HRTEM）对其结构进行表征，并结合程序控制升温法（TPO）分析不同变质程度无烟煤和煤系石墨的热反应行为。结果表明，随变质程度的增加，碳结构由无烟煤中的无定形态转变成石墨的三维有序C原子点阵。系列石墨化煤是由多种有序度不同的碳结构相组成，体现了其结构非均质性，碳结构相含量及分布随变质程度而逐渐变化，石墨化程度最高的煤系石墨中主要为石墨微晶集合体，但依旧含有结构缺陷。无烟煤和煤系石墨中碳结构的多相性和不均匀分布是影响其热反应行为的重要原因。
-
关键词:
- 煤系石墨 /
- 结构演化 /
- 热反应 /
- X射线衍射(XRD) /
- 透射电子显微镜(HRTEM) /
- 碳相 /
- 湖南新化
Abstract: To investigate the structural evolution and thermal reaction of coal-based graphite with different graphitization, the anthracite and coal-based graphite from Xinhua County, Hunan were analyzed by X-ray diffraction (XRD), high resolution transformation electron microscope(HRTEM), and temperature programmed oxidation (TPO). The results show that carbon structure transformed from the amorphous anthracite to three dimensionally ordered graphite as graphitization degree increases. The coal-based graphite samples with different graphitization degree are composed of multi carbon phases, suggesting a heterogeneous nature of coal-based graphite, and ordered carbon phases were common in higher rank samples, however, defects can still be detected in most metamorphosed coal-based graphite. The multi carbon phases co-exist and inhomogeneous distribution have important impact on the thermal reaction of coal-based graphite.-
Keywords:
- coal-based graphite /
- structural evolution /
- thermal reaction /
- XRD /
- HRTEM /
- carbon phases /
- Xinhua,Hunan
-
-
[1] 高天明,陈其慎,于汶加,等. 中国天然石墨未来需求与发展展望[J]. 资源科学,2015,37(5):1059-1067. GAO Tianming,CHEN Qishen,YU Wenjia,et al. Projection of China's graphite demand and development prospects[J]. Resources Science,2015,37(5):1059-1067.
[2] 莫如爵,刘绍斌,黄翠蓉,等. 中国石墨矿床地质[M]. 北京:中国建筑工业出版社,1989. MO Rujue,LIU Shaobin,HUANG Cuirong,et al. Geologic study of Chinese graphite deposits[M]. Beijing:China Architecture & Building Press,1989.
[3] 董业绩,曹代勇,王路,等. 地质勘查阶段煤系石墨与无烟煤的划分指标探究[J]. 煤田地质与勘探,2018,46(1):8-12. DONG Yeji,CAO Daiyong,WANG Lu,et al. Indicators for partitioning graphite and anthracite in coal measures during geological exploration phase[J]. Coal Geology & Exploration,2018,46(1):8-12.
[4] 潘伟尔,杨起,潘治贵. 湘赣中南部地区煤的岩浆热变质作用[J]. 现代地质,1993,7(3):326-336. PAN Wei'er,YANG Qi,PAN Zhigui. Magmatic thermametamorphism of coal in central-southern Hunan and Jiangxi Province[J]. Geoscience,1993,7(3):326-336.
[5] 曹代勇,张鹤,董业绩,等. 煤系石墨矿产地质研究现状与重点方向[J]. 地学前缘,2017,24(5):317-327. CAO Daiyong,ZHANG He,DONG Yeji,et al. Research status and key orientation of coal-based graphite mineral geology[J]. Earth Science Frontiers,2017,24(5):317-327.
[6] 陈家良,邵震杰,秦勇. 能源地质学[M]. 徐州:中国矿业大学出版社,2004. CHEN Jialiang,SHAO Zhenjie,QIN Yong. Energy geology[M]. Xuzhou:China University of Mining and Technology Press,2004.
[7] 罗陨飞,李文华. 中低变质程度煤显微组分大分子结构的XRD研究[J]. 煤炭学报,2004,29(3):338-341. LUO Yunfei,LI Wenhua. X-ray diffraction analysis on the different macerals of several low-to-medium metamorpic grade coals[J]. Journal of China Coal Society,2004,29(3):338-341.
[8] 杨起,吴冲龙,汤达祯,等. 中国煤变质作用[J]. 地球科学,1996,21(3):311-319. YANG Qi,WU Chonglong,TANG Dazhen,et al. Coal metamorphism in China[J]. Earth Science,1996,21(3):311-319.
[9] 张浩,侯丹丹,秦召,等. 煤系石墨氧化过程中结构变化研究[J]. 河北工程大学学报(自然科学版),2017,34(1):92-96. ZHANG Hao,HOU Dandan,QIN Zhao,et al. Study on structure change during the oxidation process of different graphitization graphite[J]. Journal of Hebei University of Engineering(Natural Science Edition),2017,34(1):92-96.
[10] RASOVIC L R,Jr PHILIP W L,JENKINS R G. Importance of carbon active sites in the gasification of coal chars[J]. Fuel,1983,62(7):849-856.
[11] NYATHI M S,CLIFFORD B C,SCHOBERT H H. Characterization of graphitic materials prepared from different rank Pennsylvania anthracites[J]. Fuel,2013,114(6):244-250.
[12] LUQUE F J,HUIZENGA J M,CEESPO-FEO E,et al. Vein graphite deposits:Geological settings,origin,and economic significance[J]. Mineralium Deposita,2014,49(2):261-277.
[13] LI Kuo,RIMMER S M,LIU Qinfu. Geochemical and petrographic analysis of graphitized coals from central Hunan,China[J]. International Journal of Coal Geology,2018,195:267-279.
[14] 崔先健,刘钦甫,李阔,等. 湖南鲁塘煤系隐晶质石墨矿物学特征[J]. 矿物学报,2018,38(2):142-151. CUI Xianjian,LIU Qinfu,LI Kuo,et al. Mineralogical characteristics of coal-based cryptocrystalline graphite in Lutang area,Hunan Province,China[J]. Acta Mineralogical Sinica,2018,38(2):142-151.
[15] 李阳,王路,曹代勇,等. 江西崇义矿煤成石墨的发现及其地质意义[J]. 煤田地质与勘探,2019,47(5):79-85. LI Yang,WANG Lu,CAO Daiyong,et al. The discovery and geological significance of coal-formed graphite in Chongyi coal mine in Jiangxi Province[J]. Coal Geology & Exploration,2019,47(5):79-85.
[16] 刘钦甫,袁亮,李阔,等. 不同变质程度煤系石墨结构特征[J]. 地球科学,2018,43(5):305-311. LIU Qinfu,YUAN Liang,LI Kuo,et al. Structure characteristics of different metamorphic grade coal-based graphites[J]. Earth Science,2018,43(5):305-311.
[17] DOORN J,VUURMAN M A,TROMP P J J,et al. Correlation between Raman spectroscopic data and the temperature programmed oxidation reactivity of coals and carbons[J]. Fuel Processing Technology,1990,24:407-413.
[18] MILLIGAN J B,THOMAS K M,CRELLING J C. Temperature- programmed combustion studies of coal and maceral group concentrates[J]. Fuel,1997,76(13):1249-1255.
计量
- 文章访问数: 187
- HTML全文浏览量: 53
- PDF下载量: 25
下载:
