Preparation of macroporous lime from natural lime by swelling method with water and acetic acid mixture for removal of sulfur dioxide at high-temperature

Shengji Wu, Naomi Sumie, Caili Su, Eiji Sasaoka, Azhar Uddin

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

A highly active macroporous sorbent for high-temperature desulfurization was prepared by swelling raw lime in a water-acetic acid mixture.The desulfurization capacity of the macroporous lime was compared with the raw lime, lime treated with liquid water, and lime treated with acetic acid vapor. It was found that the reactivity of the lime treated with water-acetic acid mixture depended on the content of calcium acetate in the precursor, a mixture of calcium acetate and calcium hydroxide. The desulfurization capacity of this sample reached the same level as the acetic acid vapor treated lime when the calcium acetate content of the precursor was 46.7%, but was much higher than the water-treated sample or the raw lime. The acetic acid-water swelling process is much more economical than the acetic acid vapor swelling method. Furthermore a mixture of water-acetic acid has a less offensive odor than pure acetic acid vapor. The higher reactivity of the lime prepared by acetic acid-water swelling method was due to the macropores (larger than 200 nm) produced during the swelling process. These macropores provide a diffusion route for SO2 in the sorbent during the sulfation and did not become plugged. It was concluded that a highly reactive and practical lime should possesses an adequate number of pores, adequate pore distribution, and good connection of the different size pores for good permeability of reactant gases and to prevent the plugging of the pores by sulfation.

Original languageEnglish
Pages (from-to)1352-1356
Number of pages5
JournalIndustrial and Engineering Chemistry Research
Volume41
Issue number5
Publication statusPublished - Mar 6 2002

Fingerprint

Sulfur Dioxide
Sulfur dioxide
sulfur dioxide
Acetic acid
Lime
Acetic Acid
acetic acid
swelling
lime
Swelling
calcium acetate
Water
water
Desulfurization
Temperature
calcium
Vapors
Calcium
acetate
acid water

ASJC Scopus subject areas

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

Cite this

Preparation of macroporous lime from natural lime by swelling method with water and acetic acid mixture for removal of sulfur dioxide at high-temperature. / Wu, Shengji; Sumie, Naomi; Su, Caili; Sasaoka, Eiji; Uddin, Azhar.

In: Industrial and Engineering Chemistry Research, Vol. 41, No. 5, 06.03.2002, p. 1352-1356.

Research output: Contribution to journalArticle

@article{92d1dbcf9b7a46378a8bfc587b4e7408,
title = "Preparation of macroporous lime from natural lime by swelling method with water and acetic acid mixture for removal of sulfur dioxide at high-temperature",
abstract = "A highly active macroporous sorbent for high-temperature desulfurization was prepared by swelling raw lime in a water-acetic acid mixture.The desulfurization capacity of the macroporous lime was compared with the raw lime, lime treated with liquid water, and lime treated with acetic acid vapor. It was found that the reactivity of the lime treated with water-acetic acid mixture depended on the content of calcium acetate in the precursor, a mixture of calcium acetate and calcium hydroxide. The desulfurization capacity of this sample reached the same level as the acetic acid vapor treated lime when the calcium acetate content of the precursor was 46.7{\%}, but was much higher than the water-treated sample or the raw lime. The acetic acid-water swelling process is much more economical than the acetic acid vapor swelling method. Furthermore a mixture of water-acetic acid has a less offensive odor than pure acetic acid vapor. The higher reactivity of the lime prepared by acetic acid-water swelling method was due to the macropores (larger than 200 nm) produced during the swelling process. These macropores provide a diffusion route for SO2 in the sorbent during the sulfation and did not become plugged. It was concluded that a highly reactive and practical lime should possesses an adequate number of pores, adequate pore distribution, and good connection of the different size pores for good permeability of reactant gases and to prevent the plugging of the pores by sulfation.",
author = "Shengji Wu and Naomi Sumie and Caili Su and Eiji Sasaoka and Azhar Uddin",
year = "2002",
month = "3",
day = "6",
language = "English",
volume = "41",
pages = "1352--1356",
journal = "Industrial & Engineering Chemistry Research",
issn = "0888-5885",
publisher = "American Chemical Society",
number = "5",

}

TY - JOUR

T1 - Preparation of macroporous lime from natural lime by swelling method with water and acetic acid mixture for removal of sulfur dioxide at high-temperature

AU - Wu, Shengji

AU - Sumie, Naomi

AU - Su, Caili

AU - Sasaoka, Eiji

AU - Uddin, Azhar

PY - 2002/3/6

Y1 - 2002/3/6

N2 - A highly active macroporous sorbent for high-temperature desulfurization was prepared by swelling raw lime in a water-acetic acid mixture.The desulfurization capacity of the macroporous lime was compared with the raw lime, lime treated with liquid water, and lime treated with acetic acid vapor. It was found that the reactivity of the lime treated with water-acetic acid mixture depended on the content of calcium acetate in the precursor, a mixture of calcium acetate and calcium hydroxide. The desulfurization capacity of this sample reached the same level as the acetic acid vapor treated lime when the calcium acetate content of the precursor was 46.7%, but was much higher than the water-treated sample or the raw lime. The acetic acid-water swelling process is much more economical than the acetic acid vapor swelling method. Furthermore a mixture of water-acetic acid has a less offensive odor than pure acetic acid vapor. The higher reactivity of the lime prepared by acetic acid-water swelling method was due to the macropores (larger than 200 nm) produced during the swelling process. These macropores provide a diffusion route for SO2 in the sorbent during the sulfation and did not become plugged. It was concluded that a highly reactive and practical lime should possesses an adequate number of pores, adequate pore distribution, and good connection of the different size pores for good permeability of reactant gases and to prevent the plugging of the pores by sulfation.

AB - A highly active macroporous sorbent for high-temperature desulfurization was prepared by swelling raw lime in a water-acetic acid mixture.The desulfurization capacity of the macroporous lime was compared with the raw lime, lime treated with liquid water, and lime treated with acetic acid vapor. It was found that the reactivity of the lime treated with water-acetic acid mixture depended on the content of calcium acetate in the precursor, a mixture of calcium acetate and calcium hydroxide. The desulfurization capacity of this sample reached the same level as the acetic acid vapor treated lime when the calcium acetate content of the precursor was 46.7%, but was much higher than the water-treated sample or the raw lime. The acetic acid-water swelling process is much more economical than the acetic acid vapor swelling method. Furthermore a mixture of water-acetic acid has a less offensive odor than pure acetic acid vapor. The higher reactivity of the lime prepared by acetic acid-water swelling method was due to the macropores (larger than 200 nm) produced during the swelling process. These macropores provide a diffusion route for SO2 in the sorbent during the sulfation and did not become plugged. It was concluded that a highly reactive and practical lime should possesses an adequate number of pores, adequate pore distribution, and good connection of the different size pores for good permeability of reactant gases and to prevent the plugging of the pores by sulfation.

UR - http://www.scopus.com/inward/record.url?scp=0037028978&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037028978&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0037028978

VL - 41

SP - 1352

EP - 1356

JO - Industrial & Engineering Chemistry Research

JF - Industrial & Engineering Chemistry Research

SN - 0888-5885

IS - 5

ER -