Synthesis, characterization and crystallization mechanism of SAPOs from natural kaolinite
文献类型：期刊论文
| 作者 | Wang, Tizhuang1,2; Lu, Xuchen1; Yan, Yan1,2 |
| 刊名 | MICROPOROUS AND MESOPOROUS MATERIALS
 |
| 出版日期 | 2010-12-01 |
| 卷号 | 136期号:1-3页码:138-147 |
| 关键词 | Silicoaluminophosphate Molecular sieve Hydrothermal synthesis Metakaolin |
| ISSN号 | 1387-1811 |
| 通讯作者 | Lu, XC |
| 英文摘要 | Calcined natural kaolinite (i.e. metakaolin) was used as a combinational Si and Al source to synthesize SAPO-5, -11, -20, -34, -44, and -47. The reactivity of metakaolin with related chemicals was studied, and the solid structural evolution process of SAPO-34 was exemplified to show the crystallization mechanism of SAPOs from kaolinite. The results indicated that the products had excellent crystallinity. The Si and/or Al of metakaolin had good coordination capability with related ligands. The crystallization process of SAPO-34 from kaolinite is summarized as three stages. In the first stage of calcination (at 1073 K), kaolinite is destructured and activated. In the second stage of aging and initial heating, the surface of metakaolin is gelated and the coordinated units are stripped down to transform into the primary building units (PBUs) with increasing temperature. At a desirable temperature, the PBUs stack to form the nuclei. In the final step, crystallization is triggered when the mixture is heated up to 423 K. NMR results illustrated that Si directly participated in the crystallization of SAPO-34 mainly as Si monomer state. Formation of SAPO-34 from kaolinite, as well as other SAPOs, is believed to proceed following an activation-gelation-crystallization mechanism. (C) 2010 Elsevier Inc. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Chemistry, Applied ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| 研究领域[WOS] | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 关键词[WOS] | SILICOALUMINOPHOSPHATE MOLECULAR-SIEVES ; NANOPOROUS SORBENTS ; SI DISTRIBUTION ; NMR ; INTERCALATION ; ALUMINOPHOSPHATE ; ALKYLAMINES ; TEMPLATE ; ALUMINUM |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000283204900018 |
| 公开日期 | 2013-11-11 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/5561]  |
| 专题 | 过程工程研究所_多相复杂系统国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China 2.CAS, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Tizhuang,Lu, Xuchen,Yan, Yan. Synthesis, characterization and crystallization mechanism of SAPOs from natural kaolinite[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2010,136(1-3):138-147. |
| APA | Wang, Tizhuang,Lu, Xuchen,&Yan, Yan.(2010).Synthesis, characterization and crystallization mechanism of SAPOs from natural kaolinite.MICROPOROUS AND MESOPOROUS MATERIALS,136(1-3),138-147. |
| MLA | Wang, Tizhuang,et al."Synthesis, characterization and crystallization mechanism of SAPOs from natural kaolinite".MICROPOROUS AND MESOPOROUS MATERIALS 136.1-3(2010):138-147. |
入库方式： OAI收割
来源：过程工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。