Insight into the effect of gel drying temperature on the structure and desulfurization performance of ZnO/SiO<sub>2</sub> adsorbents

Chao Yang; Zhelin Su; Yeshuang Wang; Huiling Fan; Meisheng Liang; Zhaohui Chen

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Insight into the effect of gel drying temperature on the structure and desulfurization performance of ZnO/SiO₂ adsorbents

Full Length Article | Updated：2026-01-06

- Insight into the effect of gel drying temperature on the structure and desulfurization performance of ZnO/SiO₂ adsorbents
- Chinese Journal of Chemical Engineering Vol. 56, Issue 4, Pages: 233-241(2023)
- Affiliations：
  
  1. College of Environmental Science and Engineering, Taiyuan University of Technology,Taiyuan,China,030024
  2. State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology,Taiyuan,China,030024
  3. State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences,Beijing,China,100190
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2023
- Accepted：
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adsorbents[J]. 中国化学工程学报, 2023, 56(4): 233-241.
DOI：

adsorbents[J]. 中国化学工程学报, 2023, 56(4): 233-241. DOI：

摘要

Abstract

A series of ZnO/SiO

adsorbents were prepared by a sol–gel method using tetraethyl orthosilicate

ethylene glycol (EG) and nitrates as precursors. The effect of gel drying temperature on the structure and desulfurization performance of the adsorbents were investigated in detail. It is found that the low drying temperature led to a weak interaction among EG

SiOH/H

O and the nitrates in the gel system

which caused the oxidation of EG by NO

and formed zinc glyoxylate complex during the gel calcination process

whereas this oxidation process also occurred at a high drying temperature during the gel drying process. The formed zinc glyoxylate complex promoted the generation of monodentate carbonate on the surface of ZnO

which resulted in the inferior desulfurization performance of adsorbents despite they have smaller ZnO nanoparticles. The gel dried at 120 ℃ formed the hydrogen bonds between EG and SiOH/H

O and a strong interaction between zinc oxo-clusters and NO

was also found in the gel system

which avoided the oxidation of EG by NO

during the preparation process and the ZnO nanopar

ticles with sizes of 6 nm were formed by a combustion method. The adsorbent affords a highest sulfur capacity of 104.9 mg·g

-1

in this case. In addition

the gel drying temperature has a significant influence on the textural properties of the adsorbents except their surface area.

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Insight into the effect of gel drying temperature on the structure and desulfurization performance of ZnO/SiO2 adsorbents

DOI：

摘要

Abstract

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references

Insight into the effect of gel drying temperature on the structure and desulfurization performance of ZnO/SiO₂ adsorbents