Removal of trace sulfur dioxide from gas stream by regenerative sorption processes

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30 Scopus citations


This work compares the characteristics and SO2 removal capacity of four physical adsorbents (sillicalite, DAY zeolite, polymer and carbon) and a chemical adsorbent (CuO/γ-Al2O3) prepared in our laboratory by a sol-gel process. SO2 sorption capacity and kinetics of CuO/γ-Al2O3, silicalite and DAY zeolite were measured gravimetrically and compared with those of the polymer and carbon adsorbents reported in the literature. The sol-gel derived granular CuO/γ-Al2O3 adsorbent has the characteristics of large surface area, high crush strength and attrition resistance, and good sulfation properties. Simulated SO2 breakthrough curves from a fixed-bed adsorber packed respectively with each of the five adsorbents are presented to examine the performance of these adsorbents for SO2 removal in the fixed-bed process. Among the four physical adsorbents silicalite exhibits the best properties in terms of adsorption capacity and breakthrough time. Simulated and experimental results show that a fixed-bed packed with a chemical adsorbent (CuO/γ-Al2O3) is far more effective (with much longer breakthrough time) than that with a physical adsorbent (silicalite) for removal of trace SO2 from gas stream.

Original languageEnglish (US)
Pages (from-to)65-77
Number of pages13
JournalSeparation and Purification Technology
Issue number1
StatePublished - Mar 3 1998
Externally publishedYes


  • SO removal
  • adsorption
  • copper oxide
  • desulfurization
  • zeolites

ASJC Scopus subject areas

  • Analytical Chemistry
  • Filtration and Separation


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