王希涛¹, 石春杰¹, 王康²
AuthorsHTML:王希涛¹, 石春杰¹, 王康²
AuthorsListE:Wang Xitao¹, Shi Chunjie¹, Wang Kang²
AuthorsHTMLE:Wang Xitao¹, Shi Chunjie¹, Wang Kang²
Unit:1. 天津大学化工学院，天津 300350；2. 天津市膜科学与海水淡化重点实验室，天津 300350
Unit_EngLish:1．School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
2．Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin 300350, China
Abstract_Chinese:采用海藻酸胺辅助溶胶-凝胶法, 以可溶性酚醛树脂为碳源, 通过调节酚醛树脂制备过程的温度和时间, 制备出一种具有光滑表面、高球形度、高机械强度、大比表面积、粒径均匀可调等特征的多孔活性炭球．采用XRD、强度测定仪、N₂吸附-脱附与SEM等方法对制备的多孔活性炭球进行表征, 探究不同的制备条件对多孔活性炭球成型过程以及孔结构的影响．结果表明：制备酚醛树脂过程的温度和反应时间是影响多孔活性炭球形貌和孔结构的决定性因素; 升高温度或延长反应时间均能提高酚醛树脂的聚合度, 从而提高多孔活性炭球的机械强度和比表面积; 酚醛树脂反应温度为95 ℃、反应时间为2 h时, 多孔活性炭球比表面积与机械强度最大, 分别为454.7 m²/g与51.8 N/粒。
Abstract_English:Using phenolic resol as carbon source and adjusting phenolic resin preparation temperature and time，a kind of porous active carbon spheres with smooth surface，high sphericity，high mechanical strength，large specific surface area and uniform particle size was prepared by alginate assisted sol-gel method. The characteristics of the porous carbon spheres were determined by XRD，tensile testing，N₂ adsorption-desorption and SEM. The influence of preparation conditions on the formation processes and the porous structures was investigated. Experimental results show that the key factors affecting the morphology and pore structure of porous active carbon spheres are the phenolic resin preparation temperature and time. The polymerization degree of phenolic resin can be improved by increasing the reaction temperature or prolonging the reaction time，which enhances the mechanical strength and specific surface area of the porous active carbon spheres. When the reaction temperature and the reaction time of phenolic resin are 95 ℃ and 2 h respectively，the specific surface area and the mechanical strength of porous activated carbon spheres reach the maximum values of 454.7 m²/g and 51.8 N/grain respectively.
Keyword_Chinese:酚醛树脂; 海藻酸铵; 多孔活性炭球
Keywords_English:phenolic resol; ammonium alginate; porous active carbon spheres

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