Preparation of mesoporous Beta zeolite by fluoride treatment in liquid phase. Textural, acid and catalytic properties
作者: Natalia SuárezJoaquín Pérez-ParienteCarlos Márquez-ÁlvarezMarisol Grande CasasAlvaro MayoralAndrés Moreno
作者单位: 1Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No.52-21, Medellín, Colombia
2Instituto de Catálisis y Petroleoquímica, CSIC, c/Marie Curie 2, Madrid, Spain
3School of Physical Science and Technology ShanghaiTech University, China
刊名: Microporous and Mesoporous Materials, 2019, Vol.284 , pp.296-303
来源数据库: Elsevier Journal
DOI: 10.1016/j.micromeso.2019.04.049
关键词: Mesoporous zeoliteBeta zeolitePost-synthesis treatmentFluorideM-xylene
英文摘要: Abstract(#br)Beta zeolite (nominal Si/Al = 19) has been treated with HF/NH 4 F solutions under different HF concentration, temperature and reaction time. It has been found that the crystallinity of the resulting materials is >80% for HF concentration up to 0.5 M, but it drops below this value for the most severe condition (HF = 1 M and 40 °C). The treatment dissolves selectively aluminum, in such a way that the Si/Al increases to 34 for the most attacked material. As a consequence of these treatments, the mesopore volume increases by up to 80% respect to the parent Beta for samples retaining high crystallinity, corresponding to newly created mesopores in the range of 5–20 nm. Detailed STEM-HAADF studies reveal that the chemical attack of the Beta crystals by the acidic fluoride solution...
全文获取路径: Elsevier  (合作)
影响因子:3.365 (2012)

  • catalytic 催化的
  • zeolite 沸石
  • fluoride 氟化物
  • liquid 液体
  • phase 相位
  • treatment 处理
  • Beta β
  • properties 道具