摘要
在NH4F存在下，以三乙胺为模板剂，采用预晶化处理的方法，合成出颗粒小而均匀、高结晶度的纯相SAPO-34分子筛，并采用XRD、BET、SEM、TEM等手段进行物化表征，系统考察了NH4F加入量、模板剂用量、硅含量、预晶化温度和时间、磷酸加入方法等因素对合成小颗粒SAPO-34的影响。预晶化和NH4F的使用有利于提高样品结晶度，使晶粒变小，比表面积和孔体积增大。
Pure phase of SAPO-34 with high crystallinity and small crystal size was synthesized by using triethylamine（Et3 N） as template in the presence of NH4F through a pre-crystallization process. The synthesized SAPO-34 was characterized by XRD, BET, SEM, and TEM. Various influence factors, such as the content of NH4F, Et3N and silica added, the pre-crystalline temperature and time, and the adding method of H3PO4 , were investigated systematically. The pre-crystallization process and the use of NH4F favor the improvement of the sample crystallinity, the decrease of the crystal size, the increase of the specific surface area and pore volume.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2008年第B10期314-317,323,共5页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
天津市自然科学基金（08JCZDJC21500）,国家重点基础研究发展计划（2003CB615801）,和教育部“新世纪优秀人才支持计划”（NCET-06-0215）项目资助
