Synthesis of submicron silicalite-1 crystals from clear solutions

Kalipcilar H., Culfaz A.

CRYSTAL RESEARCH AND TECHNOLOGY, cilt.35, sa.8, ss.933-942, 2000 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 35 Sayı: 8
  • Basım Tarihi: 2000
  • Doi Numarası: 10.1002/1521-4079(200008)35:8<933::aid-crat933>3.0.co;2-i
  • Dergi Adı: CRYSTAL RESEARCH AND TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.933-942
  • Anahtar Kelimeler: zeolite, silicalite-1, synthesis, submicron, clear solution, characterization, IN-SITU OBSERVATION, LIGHT-SCATTERING, MOLECULAR-SIEVE, CRYSTALLIZATION, TPA-SILICALITE-1, GROWTH, ZSM-5, SUSPENSIONS, NUCLEATION, TEMPLATES
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

Discrete and monodisperse submicron crystals of silicalite-l with a mean size of 0.3 mum were synthesized from clear crystallization solutions. The effects of silica content, alkalinity of batch and the nature of silica source on the product yield, crystal morphology and particle size distribution were investigated. The crystal shape was sphere-like or hexagonal twinned disks when silicic acid was the silica source. Change of silica source to sodium silicate solution leads to the formation of rounded-edged-hexahedron crystals. Silica content of batch does not influence crystal morphology. Alkalinity of clear crystallization solution has a strong effect both on the particle size distribution and yield of product. Increase of alkalinity caused bimodal particle size distribution and decrease of yield.