| 高岭土原位无溶剂法合成小粒径ZSM-5分子筛 |
| Synthesis of Small Particle Size ZSM-5 Zeolite with Kaolin by in-Situ Solvent Free Method |
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| 摘要: 结合原位水热法和无溶剂法的优点，在不添加有机模板剂和溶剂的基础上，以高岭土为原料通过晶种诱导绿色高效地合成出ZSM-5分子筛。运用X射线衍射、N2吸附-脱附、扫描电镜、透射电镜和NH3程序升温脱附（TPD-NH3）等技术对ZSM-5分子筛进行表征。表征结果与原位水热法合成的ZSM-5分子筛相比，原位无溶剂法合成ZSM-5分子筛的结晶度较高、晶体粒径较小、酸强度略高、孔结构相似。 |
| 关键词: 沸石 合成设计 合成方法 机械力化学 无溶剂 无模板剂 原位晶化 高岭土 |
| 基金项目: 国家自然科学基金（No.21371055）、湖南省教育厅科学研究项目重点项目（No.18A313）基金资助。 |
| Abstract: By effectively combining in-situ crystallization and solvent-free method, the ZSM-5 zeolite was synthesized by seed induction and optimal synthesis conditions in a green and efficient manner on the basis of kaolin as raw material without adding organic template agent and solvent. The optimal synthesis conditions for the synthesis of ZSM-5 was:nNa2O/nSiO2 was 0.18~0.22, amount of seeds added was 5%(w/w) and reaction time was 70 h. The ZSM-5 zeolite was characterized by X-ray diffraction, N2 adsorption-desorption, scanning electron microscope, transmission electron microscope and NH3 programmed temperature desorption. Compared with ZSM-5 zeolite synthesized by hydrothermal method of in-situ crystallization, ZSM-5 zeolite by in-situ solvent free method obtained higher crystallinity, smaller crystal size, slightly higher acid strength and little difference in pore structure. In addition, the in-situ solvent-free method not only solved the problems of large pressure of the synthesis system and waste liquid discharge, but also improved the utilization rate of the reactor volume. |
| Keywords: zeolites synthesis design synthesis methods mechanochemical synthesis solvent-free template-free in-situ crystallization kaolin |
| 投稿时间：2019-08-05 修订日期：2019-11-09 |
| 摘要点击次数: 2059 |
| 全文下载次数: 1132 |
| 张培青,刘思成,郑淑琴.高岭土原位无溶剂法合成小粒径ZSM-5分子筛[J].无机化学学报,2020,36(2):289-294. |
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