Citation: HAN Lei, CUI Xiao, LIU Xin-Mei. Particle Size Control for SAPO-11 Molecular Sieves[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(3): 565-570. doi: 10.3969/j.issn.1001-4861.2013.00.103 shu

Particle Size Control for SAPO-11 Molecular Sieves

1.
State Key Laboratory for Heavy Oil Processing, China University of Petroleum, Qingdao, Shandong 266580, China

Received Date: 24 September 2012
Available Online: 16 November 2012
Fund Project: 中国石油科技创新基金研究项目(No.2012D-5006-0402)资助项目。 (No.2012D-5006-0402)

In the presence of hexadecyl trimethyl ammonium bromide (CTAB) or fluoride ions (HF), superfine SAPO-11 was obtained via steam-assisted conversion method. The samples were characterized by SEM, XRD, IR, MAS NMR, TPD, TEM, TG-DSC and Nitrogen adsorption-desorption. The introduction of CTAB or HF can not only decrease the particle size, but also control the framework, morphology, pore structure and acid properties of SAPO-11 zeolites. The surfactant (CTAB) promotes the incorporation of Si atoms into the framework and leads to the increase of acid sites. The rod-like SAPO-11 monocrystal with 500 nm can be obtained in the presence of HF. F^- ions could contribute to the higher thermal stability of the sample, while they inhibit Si atoms to incorporate into the framework of the zeolite, which causes a significant decrease of acid sites.
- steam-assisted conversion;SAPO-11;superfine;zeolites
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沈阳化工大学材料科学与工程学院沈阳 110142