| SAPO-34分子筛晶化过程的研究 |
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| 引用本文： | 杨冬清,王永睿,慕旭宏,舒兴田. SAPO-34分子筛晶化过程的研究[J]. 中国科学:化学, 2014, 0(1): 138-145 |
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| 作者姓名： | 杨冬清 王永睿 慕旭宏 舒兴田 |
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| 作者单位： | 石油化工催化材料与反应工程国家重点实验室；中国石化石油化工科学研究院,北京100083 |
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| 基金项目： | 致谢本工作得到国家重点基础研究发展计划（973计划,2012CB224805）资助,特此致谢. |
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| 摘 要： | 采用XRD、SEM、ICP-AES和MAS NMR等手段系统地研究了SAPO-34分子筛在常规水热合成过程和干胶液相转化过程中的组成和骨架结构的变化.结果表明,常规水热合成法在制备SAPO-34分子筛过程中,硅溶胶缩聚和解聚速率快,活性硅物种数量较少,产品易出现杂晶;采用干胶液相转化法,固体硅源解聚速率较慢,活性硅物种数量逐步增加,SAPO-34分子筛成核和成长的速率得到了控制,抑制了杂晶相的生成,SAPO-34分子筛结晶度逐渐增加.
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| 关 键 词： | SAPO- 干胶 机理 合成 |
Study on the crystalizaiton mechanism of SAPO-34 zeolite |
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| YANG DongQing,WANG YongRui,MU XuHong,SHU XingTian. Study on the crystalizaiton mechanism of SAPO-34 zeolite[J]. Scientia Sinica Chimica, 2014, 0(1): 138-145 |
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| Authors: | YANG DongQing WANG YongRui MU XuHong SHU XingTian |
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| Affiliation: | ( State Key Laboratory of Catalytic Materials and Reaction Engineering; Research Institute of Petroleum Processing, SINOPEC, Beijing 100083, China) |
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| Abstract: | The structure and composition of SAPO-34 zeolite synthesized by conventional hydrothermal process and dry gel liquid phase crystallization process were investigated by XRD, SEM, ICP-AES and MAS NMR characterization methods. The results showed that SAPO-34 zeolite with impurity was obtained by conventional hydrothermal process. Impurity was appeared due to fewer active silicon species with high rate of silica source depolymerization and polycondensation. Pure SAPO-34 zeolite was synthesized by dry gel liquid-phase crystallization process. The rate of nucleation and growth was controlled by slower rate of silica source depolymerization. Samples of relative crystallinity increased gradually. |
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| Keywords: | SAPO-34 dry gel mechanism synthesis |
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