Novel Preparation Method of Macroporous Lime from Limestone for High-Temperature Desulfurization

Eiji Sasaoka, Azhar Uddin, Shigeru Nojima

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

In order to develop a highly active calcium oxide high-temperature desulfurization sorbent, macroporous calcium oxides were directly prepared from limestone. This method is composed of two steps: swelling of the limestone in the gas phase followed by drying and calcination of the swelled samples. The swelling was found when limestone was exposed to a vapor of aqueous acetic acid. The swelling of the sample resulted from an increase of calcium acetate formation in the sample. It was then converted to macroporous calcium oxides by heating the sample to 850°C. The reactivity of the macroporous calcium oxide for the removal of SO2 or H2S under coexisting H2O vapor was higher than that of the calcined raw limestone. In particular, its SO2 removal capacity and oxidative character of CaS to CaSO4 and CaO were greatly improved by the swelling method.

Original languageEnglish
Pages (from-to)3639-3646
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume36
Issue number9
Publication statusPublished - Sep 1997

Fingerprint

Calcium Carbonate
Desulfurization
Limestone
Lime
swelling
lime
Swelling
limestone
calcium acetate
Vapors
Temperature
Sorbents
Acetic acid
Acetic Acid
acetic acid
Calcination
Calcium
acetate
Drying
Gases

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Environmental Science(all)
  • Polymers and Plastics

Cite this

Novel Preparation Method of Macroporous Lime from Limestone for High-Temperature Desulfurization. / Sasaoka, Eiji; Uddin, Azhar; Nojima, Shigeru.

In: Industrial and Engineering Chemistry Research, Vol. 36, No. 9, 09.1997, p. 3639-3646.

Research output: Contribution to journalArticle

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