Influence of temperature ramp rate and crystallization mode on synthesis of SAPO-5 via solid-phase transformation

LIU Xuguang; CHEN Shengbo; ZHANG Baoquan

doi:10.3969/j.issn.0438-1157.2013.02.045

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Influence of temperature ramp rate and crystallization mode on synthesis of SAPO-5 via solid-phase transformation

更新时间：2025-12-10

- Influence of temperature ramp rate and crystallization mode on synthesis of SAPO-5 via solid-phase transformation
- CIESC Journal Issue 2, Pages: 735-741(2013)
- 作者机构：
  
  1. 天津大学化工学院,化学工程联合国家重点实验室,天津,300072
  2. 青岛科技大学材料学院,山东,青岛,266042
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.02.045
  CLC： 613.62TQ426.61
- Online First：05 February 2013，
  
  Published：05 February 2013
- 稿件说明：
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LIU Xuguang, CHEN Shengbo, ZHANG Baoquan. Influence of temperature ramp rate and crystallization mode on synthesis of SAPO-5 via solid-phase transformation[J]. CIESC Journal, 2013, (2): 735-741.
DOI：

LIU Xuguang, CHEN Shengbo, ZHANG Baoquan. Influence of temperature ramp rate and crystallization mode on synthesis of SAPO-5 via solid-phase transformation[J]. CIESC Journal, 2013, (2): 735-741. DOI： 10.3969/j.issn.0438-1157.2013.02.045.

摘要

固相转化法有利于合成硅取代型磷酸铝分子筛(SAPO-5)。采用XRD、SEM、EDS表征方法研究了升温速率和晶化模式对SAPO-5分子筛结构的影响。结果表明

在高升温速率(140℃·h-1)和低升温速率(5.8℃·h-1)下能合成出纯SAPO-5分子筛

在中等升温速率(17.5～70℃·h-1)下则有SAPO-34分子筛与SAPO-5伴生。此外

晶化模式对SAPO-5分子筛的形貌有显著影响。在中等升温速率下

动态晶化形成的SAPO-5分子筛为球形

静态晶化则为六边形片状

但Si的取代机制均可能为SM3取代。在高升温速率和低升温速率下

晶化模式不影响SAPO-5分子筛的形貌。而Si在动态晶化时为SM2取代

静态晶化时为SM3取代。

Abstract

Solid-phase transformation is a favorable method for preparation of Si substituted aluminophosphate molecular sieves (SAPO-5).The influence of temperature ramp rate and crystallization mode on the structure of SAPO-5 crystals was investigated by using XRD

SEM and EDS.Pure SAPO-5 phase could be synthesized with high (140℃·h-1) and low (5.8℃·h-1) temperature ramp rates.But SAPO-5 as well as SAPO-34 would be obtained with medium temperature ramp rates (17.5—70℃·h-1).Crystallization mode affected obviously the morphology of SAPO-5.With medium temperature ramp rates

sphere-shaped and hexagonal plate-like SAPO-5 crystals were prepared under dynamic and static crystallization modes respectively.But the substitution mechanism of Si might be SM3 under both crystallization modes.However

crystallization mode did not influence the morphology of SAPO-5 prepared at high and low temperature ramp rates.Substitution mechanism of Si might be SM2 and SM3 under dynamic and static crystallization mode respectively.

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