化工学报 ›› 2020, Vol. 71 ›› Issue (12): 5774-5784.DOI: 10.11949/0438-1157.20200691

• 能源和环境工程 • 上一篇    下一篇

微波加热CO2活化法制备生物质活性炭及其脱硫性能研究

田叶顺(),任文,王国袖,孙爽,周萍,王文龙,宋占龙,赵希强()   

  1. 山东大学能源与动力工程学院,燃煤污染物减排国家工程实验室,环境热工技术教育部工程研究中心,山东省能源碳减排技术与资源化利用重点实验室,山东 济南 250061
  • 收稿日期:2020-06-02 修回日期:2020-07-18 出版日期:2020-12-05 发布日期:2020-12-05
  • 通讯作者: 赵希强
  • 作者简介:田叶顺(1991—),男,博士研究生,tyshun@mail.sdu.edu.cn
  • 基金资助:
    国家重点研发计划项目(2017YFB0602903-1)

Study on preparation and desulfurization characteristics of biomass activated carbon by microwave heating CO2 activation method

TIAN Yeshun(),REN Wen,WANG Guoxiu,SUN Shuang,ZHOU Ping,WANG Wenlong,SONG Zhanlong,ZHAO Xiqiang()   

  1. National Engineering Laboratory for Reducing Emissions from Coal Combustion, Engineering Research Center of Environmental Thermal Technology of Ministry of Education, Shandong Key Laboratory of Energy Carbon Reduction and Resource Utilization, School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China
  • Received:2020-06-02 Revised:2020-07-18 Online:2020-12-05 Published:2020-12-05
  • Contact: ZHAO Xiqiang

摘要:

以富含含氮官能团的大豆秸秆为原料前体,结合微波加热的特殊优势,将微波加热技术应用于大豆秸秆热解和活化工艺。以热解固体产物为活化原料,以CO2为活化剂进行活性炭制备研究,以期制备出高脱硫性能的生物质活性炭。首先通过正交实验设计及极差分析得出最优活化水平,再通过单因素实验法考察微波功率、CO2流量和活化时间对活性炭产率、孔隙结构以及脱硫性能的影响。对比分析选出最佳活化条件为微波功率900 W,CO2流量0.10 L/min,活化时间20 min。在此条件下活性炭产率为76.3%(质量),SO2饱和吸附容量为112.56 mg/g,比表面积为466.28 m2/g。相比热解炭,活性炭的比表面积更大,孔隙更加丰富,脱硫性能显著提高。

关键词: 活性炭, 微波, 二氧化碳活化, 多孔介质, 脱硫

Abstract:

Taking soybean straw rich in nitrogen-containing functional groups as the raw material precursor, combined with the special advantages of microwave heating, microwave heating technology is applied to the pyrolysis and activation process of soybean straw. The pyrolysis solid product is used as the activation raw material, and CO2 is used as the activator to study the preparation of activated carbon, in order to prepare the biomass activated carbon with high desulfurization performance. First, the optimal activation level was obtained by orthogonal experimental design and range analysis. Then, the effects of microwave power, CO2 flow rate and activation time on the yield, pore structure and desulfurization performance of activated carbon were investigated by single factor experiment. The optimal activation conditions were selected by comparative analysis: microwave power 900 W, CO2 flow rate 0.10 L/min, activation time 20 min. Under these conditions, the yield of activated carbon is 76.3%(mass), the SO2 adsorbance quantity is 112.56 mg/g, specific surface area is 466.28 m2/g. Compared with pyrolytic carbon, activated carbon has larger specific surface area and more abundant pores and significantly improved desulfurization performance.

Key words: activated carbon, microwave, carbon dioxide activation, porous media, desulfurization

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