WU Junchen;ZHANG Wenjun;ZHU Rongtao;LU Haozhi;SUN Yang;WANG Yajun;

• 1:School of Chemical Engineering
• 2:China University of Mining and Technology
• 3:Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education
• 4:China University of Mining and Technology

Abstract：

Porous carbon was prepared by bituminous coal with different metamorphism degree and used K_2CO_3 as activators by flash Joule heating under different voltage. The effects of metamorphism degree of the bituminous coal and flash voltage on pore characteristics and crystal structure of porous carbon were investigated and characterized by a series of methods such as field emission scanning electron microscopy(FESEM), low temperature nitrogen adsorption and Raman spectra. Results show that the pressure effect and thermal expansion effect caused by the instantaneous high temperature through the Joule heating in the limited space are the driving forces for the pore formation and expansion. When the alkali-carbon ratio is 3∶1 and the flash voltage is 80 V, the pore structure of the porous carbon prepared from low metamorphic Shuozhou coal is the most developed with the specific surface area is 601.95 m~2/g and pore volume is 0.44 cm~2/g. The graphitization degree of porous carbon prepared from Changzhi coal with high metamorphic degree is the highest when the alkali-carbon ratio is 3∶1 and the flash voltage is 160 V.

Key Words： flash joule heating;metamorphic degree of bituminous coal;coal-based porous carbon;pore structure;crystal structure

Abstract:

Keywords:

Foundation: 国家自然科学基金资助项目(51974307)

Authors: WU Junchen;ZHANG Wenjun;ZHU Rongtao;LU Haozhi;SUN Yang;WANG Yajun;

DOI: 10.13226/j.issn.1006-6772.CA22112101

References：

• [1] 解强，张香兰，梁鼎成，等.煤基活性炭定向制备原理·方法·应用[J].煤炭科学技术，2021,49(1):100-127.XIE Qiang,ZHANG Xianglan,LIANG Dingcheng,et al.Directional preparation of coal-based activated carbon:Principles,approaches and applications[J].Coal Science and Technology,2021,49(1):100-127.
• [2] JAWAD A H,ISMAIL K,MOHD ISHAK M A,et al.Conversion of Malaysian low-rank coal to mesoporous activated carbon:Structure characterization and adsorption properties[J].Chinese Journal of Chemical Engineering,2019,27(7):1716-1727.
• [3] 吴宪平，王福平，崔士国.新疆煤基活性炭产业发展前景[J].洁净煤技术，2018,24(S1):95-97.WU Xianping,WANG Fuping,CUI Shiguo.Development prospect of coal-based activated carbon industry in Xinjiang[J].Clean Coal Technology,2018,24(S1):95-97.
• [4] CUHADAROGLU D,UYGUN O A.Production and characteriza-tion of activated carbon from a bituminous coal by chemical activation[J].African journal of Biotechnology,2008,7(20):3706-3713.
• [5] 张中华，解强，王燕，等.煤基活性炭孔结构对电化学性能的影响[J].中国矿业大学学报，2013,42(3):448-453.ZHANG Zhonghua,XIE Qiang,WANG Yan,et al.Effect of pore structure of coal-based activated carbon on the electrochemical performances[J].Journal of China University & Technology,2013,42(3):448-453.
• [6] 姚鑫，杨乾，赵学松，等.FeCl3添加剂作用下煤基压块活性炭的孔结构调控[J].洁净煤技术，2020,26(4):111-118.YAO Xin,YANG Qian,ZHAO Xuesong,et al.Pore structure control of coal based activated carbon prepared by briquetting method in the presence of FeCl3[J].Clean Coal Technology,2020,26(4):111-118.
• [7] STAND M G,BETS K T,LUONG D X,et al.Flash graphe-ne morphologies[J].ACS Nano,2020,14(10):13691-13699.
• [8] LUONG D X,BETS K V,ALGOZEEB W A,et al.Gram-scale bottom-up flash graphene synthesis[J].ACS Nano,2020,557:647-651.
• [9] WANG Xudong,WEI Yupeng,ZHOU Hui,et al.Synthesis of gr-aphene nanosheets by the electrical explosion of graphite powder confined in a tube[J].Ceramics International,2021,47(15):21934-21942.
• [10] 韩峰.约束电爆喷涂方法及机理研究[D].兰州：兰州理工大学，2019.
• [11] 邢宝林，黄光许，谌伦建，等.高品质低阶煤基活性炭的制备与表征[J].煤炭学报，2013,38(S1):217-222.XING Baolin,HUANG Guangxu,CHEN Lunjian,et al.Preparation and characterization of high quality low-rank coal based activated carbon[J].Journal of China Coal Society,2013,38(S1):217-222.
• [12] 林国鑫，于馨凝，刘少俊，等.煤质成分对煤基活性炭活化成孔的影响机制[J].燃烧科学与技术，2020,26(1):81-86.LIN Guoxin,YU Xinning,LIU Shaojun,et al.Influence mechanism of coal composition on activation pore formation of coal-based activated carbon[J].Journal of Combustion and Technology,2020,26(1):81-86.
• [13] TELLEZ-JUAREZ M C,FIERRO V,ZHAO W,et al.Hydrogen storage in activated carbons produced from coals of different ranks:Effect of oxygen content[J].International Journal of Hydrogen Energy,2014,39(10):4996-5002.
• [14] 辜敏，刘克万，鲜学福，等.烟煤制备成型活性炭及其 PSA 浓缩 CH4/N2中CH4的性能研究[J].功能材料，2010,41(2):204-207.GU Min,LIU Kewan,XIAN Xuefu,et al.Study on the preparation of shaped active carbon by bituminous coal and its performance for concentrating methane from CH4/N2 by pressure swing adsorption[J].Journal of Functional Materials,2010,41(2):204-207.
• [15] 樊丽华，王晓柳，侯彩霞，等.灰分对活性炭结构及性能的影响[J].炭素技术，2017,36(3):4-8.FAN Lihua,WANG Xiaoliu,HOU Caixia,et al.The effects of ash on the structure and properties of activated carbons[J].Carbon Techniques,2017,36(3):4-8.
• [16] 刘宇昊.煤基活性炭的制备及其电化学性能研究[D].焦作：河南理工大学，2020.
• [17] 王丽杰，高伟，曹善桥，等.基于K2CO3一步活化作用的煤基多孔碳孔隙与微晶结构协同发展[J].燃烧科学与技术，2020,26(6):575-587.WANG Lijie,GAO Wei,CAO Shanqiao,et al.Synergistic development mechanism between pore structure of coal-based porous carbon and microcrystalline structure based on one-step K2CO3 activation process[J].Journal of Combustion Science and Technology,2020,26(6):575-587.
• [18] 李书荣，张文辉，王岭，等.太西无烟煤制活性炭孔隙结构分析[J].洁净煤技术，2001,7(3):54-56.LI Shurong,ZHANG Wenhui,WANG Ling,et al.Pore structure analysis of Taixi anthracite based activated carbon[J].Clean Coal Technology,2001,7(3):54-56.
• [19] 林国鑫.煤基活性焦结构调控对吸附性能和抗氧化性能的影响机制研究[D] .杭州：浙江大学，2020.
• [20] LOZANO-CASTELLO D,CALO J M,CAZORLA-AMOROS D,et al.Carbon activation with KOH as explored by temperature programmed techniques and the effects of hydrogen [J].Carbon,2007,45(13):2529-2536.