Preparation of macroporous lime from natural lime by swelling method with acetic acid for high-temperature desulfurization

Journal Article · Thu Oct 01 04:00:00 EDT 1998 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie980137m· OSTI ID:669987

Sasaoka, Eiji; Sada, Norimasa; Uddin, M A ^[1]

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1. Okayama Univ. (Japan)

To develop a highly active calcium oxide high-temperature desulfurization sorbent, a method of preparation of macroporous calcium oxides from lime was studied. This method is composed of two steps: swelling of the lime and calcination of the swelled sample. Swelling occurred when lime was exposed to the vapor of acetic acid. The swelling resulted from calcium acetate formation in the sample. The swelling rate was at a maximum in the presence of acetic acid and depressed by the presence of water vapor. The swelled sample was converted to macroporous calcium oxide by heating to 850 C. The reactivity of the macroporous calcium oxide for the removal of SO{sub 2} or H{sub 2}S in the presence of H{sub 2}O vapor was higher than that of the calcined raw limestone. In particular, its SO{sub 2} removal capacity and the oxidative character of CaS to CaSO{sub 4} and Cao were greatly improved by this swelling method. These characteristics were also compared with those of a sample prepared from limestone by this swelling method.

• OSTI ID: 669987
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 10 Vol. 37; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ADSORBENTS
CALCINATION
CALCIUM OXIDES
CHEMICAL PREPARATION
DESULFURIZATION
HOT GAS CLEANUP
HYDROGEN SULFIDES
REMOVAL
SORBENT INJECTION PROCESSES
SULFUR DIOXIDE
SWELLING