一步热解活化法制备纳米木质素基多孔炭材料  

Preparation of nano-lignin-based porous carbon materials by one-step pyrolysis activation method

作　　者：王鲁元 金春江 陈惠敏[3] 程星星[4] 安东海 张兴宇 孙荣峰[1,2] 耿文广 WANG Luyuan;JIN Chunjiang;CHEN Huimin;CHENG Xingxing;AN Donghai;ZHANG Xingyu;SUN Rongfeng;GENG Wenguang(Energy Research Institute of Shandong Academy of Sciences,Jinan 250014,Shandong,China;School of Energy and Power Engineering,Qilu University of Technology,Jinan 250014,Shandong,China;Changji University,Changji 831100,Xinjiang,China;School of Energy and Power Engineering,Shandong University,Jinan 250061,Shandong,China)

机构地区：[1]山东省科学院能源研究所,山东济南250014 [2]齐鲁工业大学能源与动力工程学院,山东济南250014 [3]昌吉学院,新疆昌吉831100 [4]山东大学能源与动力工程学院,山东济南250061

出　　处：《化工进展》2022年第5期2582-2592,共11页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(51906130);山东省自然科学基金(ZR2019BEE053);山东省科学院青年基金(2020QN009);山东省重点实验室能源碳减排技术与资源化利用实验室项目(ECRRU201804);新疆教育厅新疆维吾尔自治区高校科研计划(XJEDU2019Y025);齐鲁工业大学(山东省科学院)科教产项目(2020KJC~ZD12)。

摘　　要：以木质素为原料,采用管式炉反应器通过一步热解-半活化法获得木质素基多孔炭材料(LPC)。采用氮吸附(BET)、扫描电镜(SEM)和傅里叶变换红外光谱(FTIR)对多孔炭材料的物化性质进行分析。在900℃的恒定炭化温度下,CO_(2)体积分数为6%、水蒸气体积分数约为20%时,LPC-C_(6)S_(20)表面具有良好的纳米结构,并且总孔容和比表面积分别达到0.77cm^(3)/g和1497.51m^(2)/g,活化气氛促进了多孔炭材料颗粒趋于均匀和微孔、中孔的形成。LPC样品含有—OH、C—H、C=C、C—O、C=O、CO—C、C—N、C=N等丰富的表面官能团。随着活化剂浓度的变化,这些官能团保持相对稳定。因此,通过该方法获得的样品具有良好的纳米结构,具有较大的孔容、比表面积和表面官能团。The lignin-based porous carbon material(LPC)was obtained by using lignin as raw material and tube furnace reactor through a one-step pyrolysis-activation method.Nitrogen adsorption(BET),scanning electron microscopy(SEM)and Fourier transform infrared spectroscopy(FTIR)were used to analyze the physical and chemical properties of porous carbon material.At a constant carbonization temperature of 900℃with CO_(2)concentration of 6%and water vapor concentration of about 20%,the surface of LPC-C_(6)S_(20)had a good nanostructure,and the total pore volume and specific surface area reached 0.77cm^(3)/g and 1497.51m^(2)/g,respectively.The activation atmosphere promoted the uniformity of porous carbon material particles and the formation of micropores and mesopores.The LPC sample contained abundant surface functional groups such as-OH,C-H,C=C,C-O,C=O,CO-C,C-N and C=N,etc.As the concentration of the activator changed,these functional groups remained relatively stable.Therefore,the sample obtained by this method had a good nanostructure with a larger pore volume,specific surface area and functional groups.

关 键 词：木质素 一步热解 多孔炭 孔结构 

分 类 号：X50[环境科学与工程—环境工程]