Sol-gel preparation of nanostructured adsorbents

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This paper reports sol-gel synthesis and properties of several major ceramic adsorbents. Nanostructured y-alumina, zirconia and titania adsorbents with uniform pore size distribution and an average pore diameter of about 3 nm are prepared by hydrolysis and condensation of corresponding metalorganic precursors. The as-synthesized adsorbents are in their meta-stable phases, and transform to their stable phases upon heat-treatment. The phase transformation accompanies a decrease in surface area and increase in pore size. Microporous (< 2 nm) silica adsorbents are prepared by the sol-gel method following a polymeric sol route. Doping alumina in silica adsorbents improves their thermal and hydrothermal stability. A sol-gel granulation process based on the oil-drop principle is described for preparation of y-alumina granular particles. A solutionsol mixing coating method is used to coat active species on the pore surface of the granular y-alumina particles. The sol-gel derived granular adsorbents exhibit high crush strength, good attrition resistance and desired pore structure. Experimental results show that the sol-gel derived CuO/y-alumina and CuCl/y-alumina granular adsorbents have better properties for sorption of S02 and ethylene than similar adsorbents prepared by the conventional methods.

Original languageEnglish (US)
Pages (from-to)653-686
Number of pages34
JournalStudies in Surface Science and Catalysis
Volume120 A
StatePublished - 1999
Externally publishedYes

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adsorbents
Adsorbents
Sol-gels
Aluminum Oxide
gels
preparation
Alumina
aluminum oxides
porosity
Silicon Dioxide
Pore size
Silica
silicon dioxide
comminution
Granulation
Metastable phases
Polymethyl Methacrylate
Pore structure
Sols
high strength

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Catalysis

Cite this

Sol-gel preparation of nanostructured adsorbents. / Lin, Jerry; Deng, Shuguang.

In: Studies in Surface Science and Catalysis, Vol. 120 A, 1999, p. 653-686.

Research output: Contribution to journalArticle

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AB - This paper reports sol-gel synthesis and properties of several major ceramic adsorbents. Nanostructured y-alumina, zirconia and titania adsorbents with uniform pore size distribution and an average pore diameter of about 3 nm are prepared by hydrolysis and condensation of corresponding metalorganic precursors. The as-synthesized adsorbents are in their meta-stable phases, and transform to their stable phases upon heat-treatment. The phase transformation accompanies a decrease in surface area and increase in pore size. Microporous (< 2 nm) silica adsorbents are prepared by the sol-gel method following a polymeric sol route. Doping alumina in silica adsorbents improves their thermal and hydrothermal stability. A sol-gel granulation process based on the oil-drop principle is described for preparation of y-alumina granular particles. A solutionsol mixing coating method is used to coat active species on the pore surface of the granular y-alumina particles. The sol-gel derived granular adsorbents exhibit high crush strength, good attrition resistance and desired pore structure. Experimental results show that the sol-gel derived CuO/y-alumina and CuCl/y-alumina granular adsorbents have better properties for sorption of S02 and ethylene than similar adsorbents prepared by the conventional methods.

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