富油煤热解重质焦油基泡沫炭性能研究  

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

作　　者：张蕾[1,2] 刘春江 宋瑞康 王琪 陈雅 黄鹏程 ZHANG Lei;LIU Chunjiang;SONG Ruikang;WANG Qi;CHEN Ya;HUANG Pengcheng(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,China;Geological Bureau of Ningxia Hui Autonomous Region,Yinchuan 750002,China)

机构地区：[1]西安科技大学地质与环境学院,陕西西安710054 [2]陕西省煤田地质集团有限公司自然资源部煤炭资源勘查与综合利用重点实验室,陕西西安710021 [3]宁夏回族自治区煤炭地质局,宁夏银川750002

出　　处：《煤田地质与勘探》2024年第7期166-175,共10页Coal Geology & Exploration

基　　金：宁夏回族自治区重点研发计划项目(2023BEG02058);陕西省技术创新引导专项(基金)项目(2022QFY06-04);陕西省“两链”融合重点专项项目(2023-LL-QY-05);陕西省自然科学基础研究计划项目(2019JL-01)。

摘　　要：【目的】富油煤热解重质焦油制备石墨化泡沫材料是富油煤资源高值化利用的方式之一。【方法】为探究不同反应条件与泡沫炭性能的联系从而制备高性能泡沫炭材料,以重质焦油制备中间相沥青为前驱体,采用高温自发泡法制备泡沫炭。考察不同反应温度、升温速率和反应压力对煤焦油基泡沫炭性能的影响,最后进行Box-Behnken响应面设计实验建立二次多项回归方程,揭示泡沫炭孔隙率、导热系数与反应条件的关系。【结果和结论】结果表明:反应温度、升温速率和反应压力对煤焦油基泡沫炭性能有显著影响。泡沫炭孔隙率的最优值为72.8%,对应的条件为温度559℃、压力0.48 MPa、升温速率9℃/min,影响因素温度>压力>升温速率;泡沫炭导热系数最优值为0.219 W/(m·K),对应的条件为温度549℃、压力2 MPa、升温速率3.9℃/min,影响因素升温速率>压力>温度。经过响应面模型优化后的工艺参数可制备具有良好孔隙率及导热性的泡沫炭材料,为提升富油煤热解效率提供新方案。[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 highperformance 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.

关 键 词：富油煤 重质焦油 中间相沥青 泡沫炭 响应面实验 

分 类 号：TD984[矿业工程—选矿]