Synthesis of zeolite A from Ethiopian kaolin
作者: Lijalem AyeleJoaquín Pérez-ParienteYonas ChebudeIsabel Díaz
作者单位: 1Chemistry Department, Addis Ababa University, P. O. Box 1176, Addis Ababa, Ethiopia
2Instituto de Catálisis y Petroleoquímica, CSIC, c/Marie Curie 2, 28049 Madrid, Spain
刊名: Microporous and Mesoporous Materials, 2015, Vol.215 , pp.29-36
来源数据库: Elsevier Journal
DOI: 10.1016/j.micromeso.2015.05.022
关键词: Zeolite AKaolinMetakaolinHydrothermal synthesis
英文摘要: Abstract(#br)Zeolite A is synthesized using natural kaolin from Ethiopia. Raw kaolin and mechanically purified kaolin from Ansho, southern part of Ethiopia, have been surveyed. The starting kaolin and the final zeolite A samples were characterized by X- Ray Diffraction (XRD), elemental analysis (ICP), Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA) and Cation Exchange Capacity (CEC). Metakaolinization was achieved by calcining the kaolin in air at 600 °C within 3 h, much lower than the temperatures previously reported in the literature. The optimization of the hydrothermal synthesis includes various NaOH concentrations at 100 °C, for different reaction time. Zeolite A with molar ratio SiO 2 /Al 2 O 3 = 2.04 and Na 2 O/SiO 2 = 0.44 was obtained with 90% crystallinity...
全文获取路径: Elsevier  (合作)
影响因子:3.365 (2012)

  • Ethiopian 埃塞俄比亚的
  • zeolite 沸石
  • kaolin 高岭土