Synthesis of SAPO-34 from metakaolin: Crystallization mechanism of SAPO-34 and transformation processes of metakaolin
文献类型：期刊论文
| 作者 | Wang, Tizhuang; Lu, Xuchen; Yan, Yan |
| 刊名 | MICROPOROUS AND MESOPOROUS MATERIALS
 |
| 出版日期 | 2013-03-01 |
| 卷号 | 168期号:0页码:155-163 |
| 关键词 | Silicoaluminophosphate SAPO-34 Metakaolin Crystallization mechanism Si incorporation |
| 英文摘要 | SAPO-34 molecular sieve was hydrothermally synthesized using metakaolin as the single Si and partial AI source. Crystallization mechanism of SAPO-34 and transformation processes of metakaolin were investigated by studying effect of metakaolin content on the products, and Si, Al and P coordination environments of the products by XRD, SEM, EDX, N-2 adsorption-desorption and NMR. The results showed that SAPO-34 with high purity could be prepared within a wide range of metakaolin content. Synthesis of SAPO-34 with all Si in isolated state demonstrated that SAPO-34 crystallization proceeded by a solution-mediated transport mechanism. Increase of the Si/P ratio in the medium caused increase of Si content in the newly formed SAPO-34 lattice. Transformation processes of metakaolin were followed by (1) dissolution of the Al-O and Si-O layers, (2) appearance of the primary building units (PBUs) in a low Si content, (3) initial crystallization of SAPO-34 in isolated Si state, (4) occurrence of the PBUs in a high Si content, (5) incorporation of Si domains into SAPO-34 crystals and (6) formation of the Si-rich amorphous materials. The results drawn are useful to understand crystallization mechanisms of SAPO molecular sieves from metakaolin and from other Si and/or Al chemicals. (C) 2012 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 ; CATALYTIC-PROPERTIES ; SI DISTRIBUTION ; TEMPLATE ; NMR ; ALUMINOPHOSPHATE ; DIETHYLAMINE ; CONVERSION ; METHANOL ; OLEFINS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000313839800021 |
| 公开日期 | 2015-05-27 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/13435]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | Chinese Acad Sci, Inst Proc Engn, State Key Lab Complex Syst, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Tizhuang,Lu, Xuchen,Yan, Yan. Synthesis of SAPO-34 from metakaolin: Crystallization mechanism of SAPO-34 and transformation processes of metakaolin[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2013,168(0):155-163. |
| APA | Wang, Tizhuang,Lu, Xuchen,&Yan, Yan.(2013).Synthesis of SAPO-34 from metakaolin: Crystallization mechanism of SAPO-34 and transformation processes of metakaolin.MICROPOROUS AND MESOPOROUS MATERIALS,168(0),155-163. |
| MLA | Wang, Tizhuang,et al."Synthesis of SAPO-34 from metakaolin: Crystallization mechanism of SAPO-34 and transformation processes of metakaolin".MICROPOROUS AND MESOPOROUS MATERIALS 168.0(2013):155-163. |
入库方式： OAI收割
来源：过程工程研究所
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