Comparison on stability of sulfated solid superacid with water pretreatment

QIAN Qi; WANG Danya; WANG Lei; ZHANG Xue; HU Di; ZHAO Xuejuan; LI Xiaobao; LI Licheng

doi:10.11949/j.issn.0438-1157.20151173

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Comparison on stability of sulfated solid superacid with water pretreatment

更新时间：2025-12-10

- Comparison on stability of sulfated solid superacid with water pretreatment
- CIESC Journal Issue 4, Pages: 1610-1617(2016)
- 作者机构：
  
  1. 南京林业大学化学工程学院,江苏,南京,210037
  2. 南京工程学院材料工程学院,江苏,南京,211167
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20151173
  CLC： TQ032.4}
- Online First：05 April 2016，
  
  Published：05 April 2016
- 稿件说明：
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QIAN Qi, WANG Danya, WANG Lei, et al. Comparison on stability of sulfated solid superacid with water pretreatment[J]. CIESC Journal, 2016, (4): 1610-1617.
DOI：

QIAN Qi, WANG Danya, WANG Lei, et al. Comparison on stability of sulfated solid superacid with water pretreatment[J]. CIESC Journal, 2016, (4): 1610-1617. DOI： 10.11949/j.issn.0438-1157.20151173.

摘要

以TiO2和ZrO2为载体的固体超强酸作为考察对象

重点对比研究了载体与酸化方式不同的固体超强酸在两种不同温度水预处理条件下的催化稳定性。XRD和BET表征结果显示在经过水预处理之后

各组固体超强酸的晶型和孔结构没有发生变化。结合FTIR、NH3-TPD对比研究发现

各组固体超强酸的催化活性在经过水预处理后均出现下降

水预处理温度越高

固体超强酸的酸量下降越多

酸强度减弱幅度越大

最终表现出催化活性明显下降;相比之下

硫酸促进型TiO2固体超强酸的初始活性优于以ZrO2为载体的固体超强酸

但稳定性较差;另外

对制备方式的研究发现

先焙烧再酸化所制得的固体超强酸其SO42-在水预处理过程中损失相对较少

表现出了较好的稳定性。

Abstract

In order to conveniently and rapidly evaluate the stability of the sulfated solid superacid against the water

the TiO2-supported and the ZrO2-supported solid superacid were used as the objects to study the influence of support and preparation process on the stability of solid superacid under different temperature water pretreatment. The physical structure of solid superacid was characterized by means of XRD and BET. It was found that there were no significant changes in crystallite and pore structure of the solid superacid with water pretreatment. FTIR and NH3-TPD results showed that the catalytic activity of all the solid superacid decreased a lot after water pretreatment. When the temperature of water pretreatment was rising

the amount of SO42- further dropped so that the acid amount fell and the catalytic activity of solid superacid decreased significantly. Moreover

the present work showed that the stability of ZrO2-supported sulfated solid superacid was better than that of TiO2-supported sulfated solid superacid but the initial activity was worse than the TiO2-supported superacid. In addition

the loss of SO42- of solid superacid prepared by calcination before SO42- acidification was less than that by SO42- acidification before calcination

which indicated that the preparation process had influence on the stability of solid superacid.

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