Effect of the pore-size distribution of lime on the reactivity for the removal of SO2 in the presence of high-concentration CO2 at high temperature

Shengji Wu, Azhar Uddin, Caili Su, Shinsuke Nagamine, Eiji Sasaoka

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29 Citations (Scopus)

Abstract

To develop a SO2 sorbent that is highly reactive in the presence of high concentrations of CO2 at high temperature, the effect of the pore-size distribution on the reactivity was investigated at 800 °C using a natural limestone, natural lime, modified macroporous lime, and limestone. The modified lime samples were prepared from a kind of natural lime by water-acetic acid swelling and water swelling methods. The modified limestone was prepared from the modified lime by carbonation. Pores smaller than ca. 200 nm in the modified lime and natural lime virtually disappeared, and pores larger than ca. 200 nm also considerably decreased in pore size after carbonization. The reactivity of the modified limestone depended on the degree of development of pores larger than 200 nm, because the macropores provided a diffusion route for SO2 in the sorbent during sulfation.

Original languageEnglish
Pages (from-to)5455-5458
Number of pages4
JournalIndustrial and Engineering Chemistry Research
Volume41
Issue number22
Publication statusPublished - Oct 30 2002

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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