文献类型：期刊文献

中文题名：天然气制乙炔副产炭黑的改性及其在超级电容的应用研究

英文题名：Modification of by-product carbon black from natural gas to acetylene and its application in supercapacitors

作者：宋佳[1];何贵楠[2];郝剑[1];杨建川[1];沈中杰[2];刘海峰[2,3];刘宏明[1]

机构：[1]重庆建峰新材料有限责任公司弛源化工,重庆408601;[2]华东理工大学上海煤气化工程技术研究中心,上海200237;[3]辽宁石油化工大学石油化工学院,辽宁抚顺113001

年份：2026

卷号：49

期号：1

起止页码：87

中文期刊名：煤炭转化

外文期刊名：Coal Conversion

收录：;北大核心:【北大核心2023】；

基金：国家自然科学基金项目(22378130)。

语种：中文

中文关键词：副产炭黑;超级电容器;化学活化;热冲击;多孔石墨碳

外文关键词：byproduct carbon black;supercapacitors;chemical activation;thermal shock;porous graphite carbon

摘要：天然气制乙炔过程中的副产炭黑(含水量>50%)通常作为废弃物付费给第三方进行处理,经济价值极低。提出了一种多尺度协同改性策略,通过机械研磨活化、KOH化学活化和焦耳热冲击相结合的方法,将副产炭黑转化为高性能导电炭黑用于超级电容器,不仅解决了工业副产物的高值化利用问题,还推动了高端导电炭黑的国产化进程。研究中,首先采用行星球磨仪对炭黑进行机械活化,降低其粒径并优化孔隙结构,使比表面积从43.24 m^(2)/g提升至94.83 m^(2)/g。随后结合KOH与焦耳热冲击技术进行高温化学活化,在炭黑中构建多级孔道结构以提升其比表面积和孔体积,调控炭黑的石墨微晶结构,使其层间距接近理想石墨的层间距,同时保持高孔隙率。改性后的多孔石墨炭比表面积达到989.39 m^(2)/g,其中介孔占比达78.9%。此值高于科琴黑ECP300JD的比表面积(817 m^(2)/g),在0.5 A/g负载下其比电容可以达到305.66 F/g,高于木质素炭化制备的碳微球的比电容(262.5 F/g)。组装成对称型超级电容器后,在5 A/g的高电流负载下循环1000次后,炭黑比电容仍可达到174.56 F/g,循环效率可保持在93.91%。在8.2 MPa下,炭黑的电导率可以达到1.12 S/mm,电阻率可以达到0.89Ω·mm,远小于乙炔炭黑电阻率的国标值3000Ω·mm。改性后的副产炭黑具有优异的导电性,可用于高性能超级电容器等新能源领域。
In conventional acetylene production from natural gas,by-product carbon black(moisture content>50%)is typically classified as process waste requiring costly third-party disposal due to negligible economic value.A multiscale synergistic modification strategy to transform this material into high-performance conductive carbon for supercapacitors through integrated mechanical grinding activation,KOH chemical activation,and Joule heat shock processing was propsed.This approach enables high-value utilization of industrial by-products while advancing domestic manufacturing of premium conductive carbons.In this study,planetary ball milling was first employed to mechanically activate the carbon black,reducing particle size and optimizing pore architecture to elevate the specific surface area from 43.24 m^(2)/g to 94.83 m^(2)/g.Subsequently,hightemperature chemical activation was conducted using a combination of KOH and Joule heat shock technology to construct hierarchical pore structures within the carbon black,enhancing its specific surface area and pore volume.The interlayer spacing of the graphite microcrystalline structure in the carbon black was adjusted using Joule heat shock technology to approach that of ideal graphite while maintaining a high porosity.After modification,the porous graphite carbon achieved a specific surface area of 989.39 m^(2)/g,with mesopores accounting for 78.9%of the total pore volume.This value exceeds the specific surface area of Ketjen Black ECP300J(817 m^(2)/g).The specific capacitance of the material reaches 305.66 F/g at a current density of 0.5 A/g,which is higher than that of carbon microspheres prepared by lignin carbonization(262.5 F/g).When assembled into a symmetric supercapacitor,the carbon black electrode retained a specific capacitance of 174.56 F/g after 1000 cycles at a high current density of 5 A/g,with the cycling efficiency maintained at 93.91%.At a pressure of 8.2 MPa,the electrical conductivity of the carbon black can reach 1.12 S/mm,corresponding to a resistivity of 0.89Ω·m,which is much lower than the national standard value of 3000Ω·mm for the resistivity of acetylene carbon black.The modified by-product carbon black exhibits exceptional electrical conductivity,rendering its suitable for applications in high-performance supercapacitors and other new energy fields.