气体活化法制备玉米芯酸水解残渣活性炭及表征.doc

中国工程热物理学会 燃烧学 学术会议论文 编号：134340 CO2活化法制备玉米芯酸水解残渣活性炭 黄艳琴1，阴秀丽1*，吴创之1 (1.中国科学院广州能源研究所中国科学院可再生能源重点试验室，广州 510640；2.中国科学院，北京 100039)TelE-mail:huangyq@ms.giec.ac.cn 摘 要采用CO2活化法，以玉米芯稀酸水解残渣为原料制备残渣。考察了活化温度、活化时间、CO2流量、残酸及原料粒径等因素对残渣活性炭产品得率和吸附性能的影响。通过对得率和吸附能力的综合评估获得残渣活性炭的优化活化条件：活化温度950℃，活化时间60min，CO2流量20ml/min·，在此条件下活性炭得率为19.6%，碘吸附值为915.2mg/g。利用了活性炭样品，结果显示残渣活性炭表面具有丰富的微孔和中孔含有酸性和碱性含氧官能团。CO2活Preparation of Activated Carbon from Corncob Hydrolysis Residue by Carbon Dioxide Activation Huang Yanqin1, Wei Zhiguo1,2, Yin Xiuli1*, Wu Chuangzhi1 （1. CAS Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640,China; 2. University of Chinese Academy of Sciences, Beijing 100049,China） Activated carbon was prepared from corncob acid hydrolysis residue with carbon dioxide as activating agent. Effects of activation temperature, activation time, CO2 flux rate, residual acid and particle size on the yield and adsorption property of residue activated carbon (RAC) were studied. The optimal preparation conditions of the RAC were showed as follows: activation temperature was 950℃, activation time was 60min, and the CO2 flow rate was 20 ml/min·gmaterial, when the yield and iodine adsorption value of the RAC was 19.6%, 915.2mg/g, respectively. The characterization of prepared RAC is performed by nitrogen adsorption, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). Results showed that abundant micropores and mesopores were observed on apparent morphology of the RAC. FTIR analysis indicated that both acidic and alkaline oxygen-containing functional groups were detected. Key words: Corncob hydrolysis residue; CO2 activation; Activated carbon; Pore structure 引言 生物质水解残渣是生物质水解发酵工艺的过程残余物，其产量大且相对集中，是一种典型的生物质资源。与原生生物质相比，水解残渣中木质素含量高，一方面，热解后固体产物的得率较高，另一方面，高木质素原料碳化后形成的炭骨好，