Growth of SAPO-34 in polymer hydrogels through vapor-phase transport

Jianfeng Yao; Huanting Wang; Simon P. Ringer; Kwong Yu Chan; Lixiong Zhang; Nanping Xu

doi:10.1016/j.micromeso.2005.06.026

Growth of SAPO-34 in polymer hydrogels through vapor-phase transport

Jianfeng Yao, Huanting Wang, Simon P. Ringer, Kwong Yu Chan, Lixiong Zhang, Nanping Xu

College of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

Cross-linked polyacrylamide (C-PAM) hydrogels were employed to reduce the crystal size of SAPO-34 molecular sieves in a vapor-phase transport process. A wide size distribution of SAPO-34 crystals, ranging from a few nanometers to 3-5 μm, was produced when the synthesis precursor gels contained the appropriate amount of C-polyacrylamide (C-PAM) hydrogels. Specifically, these dispersions of SAPO-34 crystallites were formed when the molar ratio of polyacrylamide to Al₂O₃ was between 0.29 and 043. These crystals exhibited a BET surface area of 342-325 m²/g, micropore volume of 0.15-0.12 cm³/g, and TEA entrapment of 9.3-8.0%. Microanalysis using EDXS revealed the presence of residual precursor materials, such as phosphorus, supporting the fact that our samples possessed a lower BET surface area and micropore volume as compared with the SAPO-34 prepared by hydrothermal method in the literature.

Original language	English
Pages (from-to)	267-272
Number of pages	6
Journal	Microporous and Mesoporous Materials
Volume	85
Issue number	3
DOIs	https://doi.org/10.1016/j.micromeso.2005.06.026
State	Published - 7 Nov 2005

Keywords

Crystal size
Polymer hydrogel
SAPO-34
Silicoaluminophosphate (SAPO)
Vapor-phase transport (VPT)

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10.1016/j.micromeso.2005.06.026

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title = "Growth of SAPO-34 in polymer hydrogels through vapor-phase transport",

abstract = "Cross-linked polyacrylamide (C-PAM) hydrogels were employed to reduce the crystal size of SAPO-34 molecular sieves in a vapor-phase transport process. A wide size distribution of SAPO-34 crystals, ranging from a few nanometers to 3-5 μm, was produced when the synthesis precursor gels contained the appropriate amount of C-polyacrylamide (C-PAM) hydrogels. Specifically, these dispersions of SAPO-34 crystallites were formed when the molar ratio of polyacrylamide to Al2O3 was between 0.29 and 043. These crystals exhibited a BET surface area of 342-325 m2/g, micropore volume of 0.15-0.12 cm3/g, and TEA entrapment of 9.3-8.0%. Microanalysis using EDXS revealed the presence of residual precursor materials, such as phosphorus, supporting the fact that our samples possessed a lower BET surface area and micropore volume as compared with the SAPO-34 prepared by hydrothermal method in the literature.",

keywords = "Crystal size, Polymer hydrogel, SAPO-34, Silicoaluminophosphate (SAPO), Vapor-phase transport (VPT)",

author = "Jianfeng Yao and Huanting Wang and Ringer, {Simon P.} and Chan, {Kwong Yu} and Lixiong Zhang and Nanping Xu",

year = "2005",

month = nov,

day = "7",

doi = "10.1016/j.micromeso.2005.06.026",

language = "英语",

volume = "85",

pages = "267--272",

journal = "Microporous and Mesoporous Materials",

issn = "1387-1811",

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TY - JOUR

T1 - Growth of SAPO-34 in polymer hydrogels through vapor-phase transport

AU - Yao, Jianfeng

AU - Wang, Huanting

AU - Ringer, Simon P.

AU - Chan, Kwong Yu

AU - Zhang, Lixiong

AU - Xu, Nanping

PY - 2005/11/7

Y1 - 2005/11/7

N2 - Cross-linked polyacrylamide (C-PAM) hydrogels were employed to reduce the crystal size of SAPO-34 molecular sieves in a vapor-phase transport process. A wide size distribution of SAPO-34 crystals, ranging from a few nanometers to 3-5 μm, was produced when the synthesis precursor gels contained the appropriate amount of C-polyacrylamide (C-PAM) hydrogels. Specifically, these dispersions of SAPO-34 crystallites were formed when the molar ratio of polyacrylamide to Al2O3 was between 0.29 and 043. These crystals exhibited a BET surface area of 342-325 m2/g, micropore volume of 0.15-0.12 cm3/g, and TEA entrapment of 9.3-8.0%. Microanalysis using EDXS revealed the presence of residual precursor materials, such as phosphorus, supporting the fact that our samples possessed a lower BET surface area and micropore volume as compared with the SAPO-34 prepared by hydrothermal method in the literature.

AB - Cross-linked polyacrylamide (C-PAM) hydrogels were employed to reduce the crystal size of SAPO-34 molecular sieves in a vapor-phase transport process. A wide size distribution of SAPO-34 crystals, ranging from a few nanometers to 3-5 μm, was produced when the synthesis precursor gels contained the appropriate amount of C-polyacrylamide (C-PAM) hydrogels. Specifically, these dispersions of SAPO-34 crystallites were formed when the molar ratio of polyacrylamide to Al2O3 was between 0.29 and 043. These crystals exhibited a BET surface area of 342-325 m2/g, micropore volume of 0.15-0.12 cm3/g, and TEA entrapment of 9.3-8.0%. Microanalysis using EDXS revealed the presence of residual precursor materials, such as phosphorus, supporting the fact that our samples possessed a lower BET surface area and micropore volume as compared with the SAPO-34 prepared by hydrothermal method in the literature.

KW - Crystal size

KW - Polymer hydrogel

KW - SAPO-34

KW - Silicoaluminophosphate (SAPO)

KW - Vapor-phase transport (VPT)

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U2 - 10.1016/j.micromeso.2005.06.026

DO - 10.1016/j.micromeso.2005.06.026

M3 - 文章

AN - SCOPUS:26044482223

SN - 1387-1811

VL - 85

SP - 267

EP - 272

JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

IS - 3

ER -

Growth of SAPO-34 in polymer hydrogels through vapor-phase transport

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Keywords

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