Exploring Hydrothermal Synthesis of SAPO-18 under High Hydrostatic Pressure

被引：5

作者：

Simancas, Raquel ^{[1
]}

Takemura, Masamori ^{[2
]}

Yonezawa, Yasuo ^{[1
]}

Sukenaga, Sohei ^{[3
]}

Ando, Mariko ^{[4
]}

Shibata, Hiroyuki ^{[3
]}

Chokkalingam, Anand ^{[1
]}

Iyoki, Kenta ^{[2
]}

Okubo, Tatsuya ^{[2
]}

Wakihara, Toru ^{[1
,2
]}

机构：

[1] Univ Tokyo, Inst Engn Innovat, Tokyo 1138656, Japan

[2] Univ Tokyo, Dept Chem Syst Engn, Tokyo 1138656, Japan

[3] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

[4] Tohoku Univ, Grad Sch Engn, Sendai, Miyagi 9808579, Japan

来源：

NANOMATERIALS | 2022年 / 12卷 / 03期

关键词：

silicoaluminophosphates; hydrothermal synthesis; high pressure; water content; non-conventional synthesis; MOLECULAR-SIEVES; ZEOLITE SYNTHESIS; SILICOALUMINOPHOSPHATE; CRYSTALLIZATION; METHANOL; CONVERSION; STABILITY;

D O I：

10.3390/nano12030396

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The effect of external hydrostatic pressure on the hydrothermal synthesis of the microporous silicoaluminophosphate SAPO-18 has been explored. The crystallization of the SAPO-18 phase is inhibited at 150 degrees C under high pressures (200 MPa) when using relatively diluted synthesis mixtures. On the contrary, the use of concentrated synthesis mixtures allowed SAPO-18 to be obtained in all the studied conditions. The obtained solids were characterized with XRD, SEM, ICP-AES, TG and Al-27 and P-31 MAS NMR spectroscopy. The results highlight the importance of the external pressure effect on the hydrothermal synthesis of molecular sieves and its influence on the interaction between the organic molecule and the silicoaluminophosphate network.

引用

页数：12

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