Performance of carbon foams based on heavy tar produced by tar-rich coal pyrolysis

Authors

ZHANG Lei, College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China; Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources, Shaanxi Coal Geology Group Co., Ltd., Xi’an 710021, ChinaFollow
LIU Chunjiang, College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China
SONG Ruikang, College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China
WANG Qi, College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China
CHEN Ya, College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China
HUANG Pengcheng, Geological Bureau of Ningxia Hui Autonomous Region, Yinchuan 750002, China

Abstract

Objective Preparing graphitized foam materials using heavy tar produced by the pyrolysis of tar-rich coals plays a significant role in the high-value utilization of tar-rich coal resources. Methods This study aims to prepare high-performance carbon foam materials by investigating the relationships between various reaction conditions and carbon foam performance. First, using mesophase asphalt prepared with heavy tar as the precursor, carbon foams were developed via the high-temperature self-foaming method. Then, the effects of different reaction temperatures, heating rates, and reaction pressures on the performance of coal tar-based carbon foams were examined. Finally, quadratic multinomial regression equations were established using Box-Behnken response surface experiments, revealing the relationships of the porosity and thermal conductivity of the carbon foams with various reaction conditions. Results and Conclusions The experimental results indicate that the reaction temperature, heating rate, and reaction pressure significantly influence the performance of coal tar-based carbon foams. The optimal porosity of the carbon foams was 72.8%, corresponding to a temperature of 559 ℃, a pressure of 0.48 MPa, and a heating rate of 9 ℃/min. In this case, the effects of these reaction conditions decreased in the order of temperature, pressure, and heating rate. The optimal thermal conductivity value of the carbon foams was 0.219 W/(m·K), corresponding to a temperature of 549 ℃, a pressure of 2 MPa, and a heating rate of 3.9 ℃/min. In such an instance, the effects of these factors decreased in the order of heating rate, pressure, and temperature. The process parameters optimized using the response surface model enable the preparation of carbon foam materials with high porosity and thermal conductivity, providing a new solution for enhancing the pyrolysis efficiency of tar-rich coals.

Keywords

tar-rich coal, heavy tar, mesophase asphalt, carbon foam, response surface experiment

DOI

10.12363/issn.1001-1986.23.10.0674

Recommended Citation

ZHANG Lei, LIU Chunjiang, SONG Ruikang, et al. (2024) "Performance of carbon foams based on heavy tar produced by tar-rich coal pyrolysis," Coal Geology & Exploration: Vol. 52: Iss. 7, Article 17.
DOI: 10.12363/issn.1001-1986.23.10.0674
Available at: https://cge.researchcommons.org/journal/vol52/iss7/17

Reference

[1] CHUN Yutong，ZHANG Jun，HAN Yijie. Green development level assessment and obstacle analysis of China’s coal-resource-based regions[J]. Heliyon，2023，9：1−11.

[2] XU Jiuping，WANG Fengjuan，LYU Chengwei，et al. Carbon emission reduction and reliable power supply equilibrium based daily scheduling towards hydro-thermal-wind generation system：A perspective from China[J]. Energy Conversion and Management，2018，164：1−14.

[3] 中矿(北京)煤炭产业景气指数研究课题组. 2022—2023年中国煤炭产业经济形势研究报告[J]. 中国煤炭，2023，49(3)：2−10.

Research Group of Zhongkuang (Beijing) Coal Industry Prosperity Index. Research report on the economic situation of China’s coal industry from 2022 to 2023[J]. China Coal，2023，49(3)：2−10.

[4] 王双明，王虹，任世华，等. 西部地区富油煤开发利用潜力分析和技术体系构想[J]. 中国工程科学，2022，24(3)：49−57.

WANG Shuangming，WANG Hong，REN Shihua，et al. Potential analysis and technical conception of exploitation and utilization of tar–rich coal in western China[J]. Strategic Study of CAE，2022，24(3)：49−57.

[5] 许婷，李宁，姚征，等. 陕北榆神矿区富油煤分布规律及形成控制因素[J]. 煤炭科学技术，2022，50(3)：161−168.

XU Ting，LI Ning，YAO Zheng，et al. Distribution and geological controls of tar–rich coals in Yushen Mining Area of northern Shaanxi[J]. Coal Science and Technology，2022，50(3)：161−168.

[6] 马晓迅，赵阳坤，孙鸣，等. 高温煤焦油利用技术研究进展[J]. 煤炭转化，2020，43(4)：1−11.

MA Xiaoxun，ZHAO Yangkun，SUN Ming，et al. Technical review on utilization technology of high temperature coal tar[J]. Coal Conversion，2020，43(4)：1−11.

[7] 胡发亭，张晓静，李培霖. 煤焦油加工技术进展及工业化现状[J]. 洁净煤技术，2011，17(5)：31−35.

HU Fating，ZHANG Xiaojing，LI Peilin，et al. Development of processing technology and industrialization status of coal tar[J]. Clean Coal Technology，2011，17(5)：31−35.

[8] 孟宇，朱仕元，高平强. 低温煤焦油的综合利用[J]. 价值工程，2019，38(32)：265−266.

MENG Yu，ZHU Shiyuan，GAO Pingqiang. Comprehensive utilization of low temperature coal tar[J]. Value Engineering，2019，38(32)：265−266.

[9] 脱凯用，王卓雅，蒋本杰，等. 低阶煤微波辅助催化热解焦油特性研究[J]. 煤炭科学技术，2019，47(8)：235−242.

TUO Kaiyong，WANG Zhuoya，JIANG Benjie，et al. Study on characteristics of tar from low–rank coal via microwave–assisted catalytic pyrolysis[J]. Coal Science and Technology，2019，47(8)：235−242.

[10] 罗航宇. SBS改性沥青及透水混合料性能研究[D]. 长春：长春工程学院，2021.

LUO Hangyu. Study on properties of SBS modified asphalt and permeable mixture[D]. Changchun：Changchun Institute of Technology，2021.

[11] 袁家相，方伟，陈辉，等. 碳化温度对泡沫碳光热水蒸发性能的影响[J]. 功能材料，2023，54(1)：1186−1193.

YUAN Jiaxiang，FANG Wei，CHEN Hui，et al. Effect of carbonization temperature on the solar steam generation of carbon foam[J]. Journal of Functional Materials，2023，54(1)：1186−1193.

[12] ZHANG Lei，LIU Chunjiang，JIA Yang，et al. Pyrolytic modification of heavy coal tar by multi–polymer blending：preparation of ordered carbonaceous mesophase[J]. Polymers，2024，16(1)：161.

[13] 王小宪，李铁虎，魏宏艳，等. 泡沫炭的制备和性能[J]. 材料导报，2005，19(5)：11−13.

WANG Xiaoxian，LI Tiehu，WEI Hongyan，et al. Preparation and performance of carbon foam[J]. Materials Reports，2005，19(5)：11−13.

[14] 余立琼，李凯，刘荣军，等. 强度增强泡沫炭的制备、结构与性能[J]. 高等学校化学学报，2011，32(4)：834−838.

YU Liqiong，LI Kai，LIU Rongjun，et al. Preparation，structures and properties of strength–enhanced carbon foams[J]. Chemical Journal of Chinese Universities，2011，32(4)：834−838.

[15] ZHANG Lei，CEHN Ya，ZHANG Lei，et al. Preparation of ZrO₂/γ-Al₂O₃ albumen type catalyst and its catalytic performance for carbonyl sulfide hydrolysis[J]. Applied Physics A，2024，130(3)：170.

[16] 居建国，李文晓，薛元德. 碳泡沫材料及其在航天航空中的应用[J]. 上海航天，2008，25(2)：42−46.

JU Jianguo，LI Wenxiao，XUE Yuande. Carbon foam material and its applications in spaceflight and aviation[J]. Aerospace Shanghai，2008，25(2)：42−46.

[17] 王跃毅，鄢定祥，李忠明. 碳纳米管/聚酰亚胺泡沫的制备及其吸波性能[J]. 航空学报，2022，43(7)：425531.

WANG Yueyi，YAN Dingxiang，LI Zhongming. Preparation of carbon nanotubes polyimide foam and its microwave absorption properties[J]. Acta Aeronautica et Astronautica Sinica，2022，43(7)：425531.

[18] 赵婧. 泡沫玻璃的制备及其性能研究[J]. 陶瓷，2018(6)：16−22.

ZHAO Jing. Study on the preparation and properties of foam glass[J]. Ceramics，2018(6)：16−22.

[19] 方名聪，李建新. 浅析泡沫碳防火板的性能特点及应用前景[J]. 广东建材，2022，38(1)：40−41.

FANG Mingcong，LI Jianxin. Analysis on the performance characteristics and application prospect of foam carbon fire–proof board[J]. Guangdong Building Materials，2022，38(1)：40−41.

[20] 李洁，包建军. 巯基化石墨烯/碳纳米管/三聚氰胺泡沫复合电极的制备及在电吸附除铜中的应用[J]. 高分子材料科学与工程，2020，36(7)：163−168.

LI Jie，BAO Jianjun. Preparation of TrGO/multi walled carbon nanotubes/melamine foam composite electrode and its application in electrosorption of copper[J]. Polymer Materials Science and Engineering，2020，36(7)：163−168.

[21] 马宇萱，闫伦靖，王美君，等. 泡沫炭催化剂对低阶煤热解焦油改质的影响[J]. 太原理工大学学报，2022，53(6)：1083−1092.

MA Yuxuan，YAN Lunjing，WANG Meijun，et al. Effect of carbon foam catalyst on tar upgrading during low rank coal pyrolysis[J]. Journal of Taiyuan University of Technology，2022，53(6)：1083−1092.

[22] 高浩. 陕北富油煤热解提油基础特性及煤焦油净化机理研究[D]. 西安：西安科技大学，2022.

GAO Hao. Basic characteristics of oil extraction from northern Shaanxi oilrich coal pyrolysis and purification mechanism of coal tar[D]. Xi’an：Xi’an University of Science and Technology，2022.

[23] 陈秀男，吕永根，蒋俊祺. 低温低压下发泡制备泡沫碳的结构与性能研究[J]. 当代化工，2013，42(2)：131−134.

CHEN Xiunan，LYU Yonggen，JIANG Junqi. Study on structure and properties of the carbon foam prepared under low temperature and low pressure[J]. Contemporary Chemical Industry，2013，42(2)：131−134.

[24] 陈青香，李铁虎，庄强，等. 制备工艺对中间相沥青基泡沫炭结构的影响[J]. 炭素技术，2010，29(4)：5−8.

CHEN Qingxiang，LI Tiehu，ZHUANG Qiang，et al. Effect of preparation conditions on the structure of mesophase pitch–based carbon foams[J]. Carbon Techniques，2010，29(4)：5−8.

[25] 周萍. 煤焦油净化制备泡沫碳[D]. 贵阳：贵州大学，2016.

ZHOU Ping. Preparation of foam carbon from coal tar[D]. Guiyang：Guizhou University，2016.

[26] LIU Heguang，LI Tiehu，SHI Yachun，et al. Effect of different secondary quinoline insoluble content on the cellular structure of carbon foam derived from coal tar pitch[J]. Journal of Analytical and Applied Pyrolysis，2014，108：310−315.

[27] 王鹏，吕永根，秦显营，等. 超临界条件对沥青泡沫炭结构的影响[J]. 炭素，2008(2)：3–10.

WANG Peng，LYU Yonggen，QIN Xianying，et al. Supercritical conditions on the structure of carbon foam from pitch[J]. Carbon，2008(2)：3–10.

[28] 常鸿雁，张元新，李克健，等. 热聚合温度对煤液化沥青制备中间相沥青的影响[J]. 洁净煤技术，2017，23(3)：76−80.

CHANG Hongyan，ZHANG Yuanxin，LI Kejian，et al. Effect of temperature on the preparation of mesophase pitch from coal liquefaction pitch[J]. Clean Coal Technology，2017，23(3)：76−80.

[29] YU Jiang，MA Xianglong，SONG Qingfeng，et al. The effect of B₄C on the properties of graphite foam prepared by template method[J]. Materials Research Innovations 2015，19(Sup.5)：118–122.