催化学报

催化学报 ›› 2006, Vol. 27 ›› Issue (7): 601-605.

• 研究论文 • 上一篇    下一篇

ERB-1分子筛的合成与表征

牛雄雷1,2,谢素娟1,徐龙伢1   

  1. 1 中国科学院大连化学物理研究所, 辽宁大连 116023; 2 中国科学院研究生院, 北京 100049
  • 收稿日期:2006-07-25 出版日期:2006-07-25 发布日期:2006-07-25

Synthesis and Characterization of ERB-1 Zeolite

NIU Xionglei1,2, XIE Sujuan1, XU Longya1*   

  1. 1 Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, Liaoning, China; 2 Graduate University of The Chinese Academy of Sciences, Beijing 100049, China
  • Received:2006-07-25 Online:2006-07-25 Published:2006-07-25

PDF

798

被引次数

17

摘要： 分别以白炭黑、硼酸和氢氧化钠为硅源、硼源和碱源,以六亚甲基亚胺为模板剂,系统地研究了硅硼比、碱量、模板剂用量和水量对合成ERB-1分子筛的影响,并采用N2物理吸附、吸附NH3的程序升温脱附、热重和差热分析、 X射线衍射和傅里叶变换红外光谱等手段对样品的表面性质、酸性和热稳定性进行了表征. 结果表明,合成ERB-1分子筛较好的原料组成为 n(SiO2)/n(B2O3)=0.6～2, n(H2O)/n(SiO2)=40, n(NaOH)/n(SiO2)=0.1～0.2和n(HMI)/n(SiO2)=0.8～1; ERB-1分子筛上的酸中心以弱酸为主,且酸强度较低; ERB-1的结构在800 ℃以下保持稳定.

关键词: 硼硅分子筛, ERB-1分子筛, MCM-22分子筛, 合成

Abstract: The ERB-1 zeolite was synthesized using silica aerogel as the silica source, boric acid as the boron source, and sodium hydroxide as the alkali source, respectively. The obtained ERB-1 zeolite was characterized by X-ray diffraction (XRD), N2 adsorption, NH3 temperature-programmed desorption (NH3-TPD), thermogravimetry analysis (TG), differential thermal analysis (DTA) and Fourier-transform infrared reflectance spectroscopy (FT-IR). It was found that the suitable synthesis gel compositions were n(SiO2)/n(B2O3)=0.6～2, n(H2O)/n(SiO2)=40, n(NaOH)/n(SiO2)=0.1～0.2, and n(HMI)/n(SiO2)=0.8～1. The FT-IR result indicated that a part of boron atoms had incorporated into the framework of ERB-1 zeolite. The TG, DTA, and XRD results showed that the ERB-1 zeolite maintained its framework below 800 ℃ when it was calcined in air flow. The NH3-TPD result exhibited that the ERB-1 zeolite had poor acidity and the weak acid was in the majority of its acid sites.

Key words: borosilicate zeolite, ERB-1 zeolite, MCM-22 zeolite, synthesis