Preparation of fly ash-Ca(OH)2 sorbents by pressure hydration for so2 removal

N. Karatepe; A. E. Meriçboyu; S. Küçükbayrak

doi:10.1080/00908319808970109

Preparation of fly ash-Ca(OH)₂ sorbents by pressure hydration for so₂ removal

N. Karatepe^*, A. E. Meriçboyu, S. Küçükbayrak

^*Corresponding author for this work

Istanbul Technical University

Research output: Contribution to specialist publication › Article

16 Citations (Scopus)

Abstract

Reactive sorbents for SO₂ removal from humidified flue gas were prepared from fly ash-Ca(OH)₂ mixtures using the pressure hydration technique. The fly ash samples were taken from three different coal-fired power plants in Turkey. The fly ash/Ca(OH)₂ weight ratio, hydration time, and temperature were varied during the sorbent preparation step. Effects of these variations on the physical properties of activated sorbents were investigated. A statistical design technique was applied by use of a two-level factorial design matrix to interpret experimental results. It was found that increasing the temperature and fly ash/Ca(OH)₂ weight ratio caused a decrease in the total surface area of sorbents. However, surface area values of sorbents were not generally affected by the hydration time variation. Finally, fly ash-Ca(OH)₂ sorbents prepared at the optimum hydration conditions were sulphated at 338 K with a synthetic gaseous mixture containing 5000 ppm SO₂ and 55% relative humidity.

Original language	English
Pages	945-953
Number of pages	9
Volume	20
No.	10
Specialist publication	Energy Sources
DOIs	https://doi.org/10.1080/00908319808970109
Publication status	Published - 1998

Keywords

Pressure hydration
Sorbent
Statistical design

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10.1080/00908319808970109

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abstract = "Reactive sorbents for SO2 removal from humidified flue gas were prepared from fly ash-Ca(OH)2 mixtures using the pressure hydration technique. The fly ash samples were taken from three different coal-fired power plants in Turkey. The fly ash/Ca(OH)2 weight ratio, hydration time, and temperature were varied during the sorbent preparation step. Effects of these variations on the physical properties of activated sorbents were investigated. A statistical design technique was applied by use of a two-level factorial design matrix to interpret experimental results. It was found that increasing the temperature and fly ash/Ca(OH)2 weight ratio caused a decrease in the total surface area of sorbents. However, surface area values of sorbents were not generally affected by the hydration time variation. Finally, fly ash-Ca(OH)2 sorbents prepared at the optimum hydration conditions were sulphated at 338 K with a synthetic gaseous mixture containing 5000 ppm SO2 and 55\% relative humidity.",

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T1 - Preparation of fly ash-Ca(OH)2 sorbents by pressure hydration for so2 removal

AU - Karatepe, N.

AU - Meriçboyu, A. E.

AU - Küçükbayrak, S.

PY - 1998

Y1 - 1998

N2 - Reactive sorbents for SO2 removal from humidified flue gas were prepared from fly ash-Ca(OH)2 mixtures using the pressure hydration technique. The fly ash samples were taken from three different coal-fired power plants in Turkey. The fly ash/Ca(OH)2 weight ratio, hydration time, and temperature were varied during the sorbent preparation step. Effects of these variations on the physical properties of activated sorbents were investigated. A statistical design technique was applied by use of a two-level factorial design matrix to interpret experimental results. It was found that increasing the temperature and fly ash/Ca(OH)2 weight ratio caused a decrease in the total surface area of sorbents. However, surface area values of sorbents were not generally affected by the hydration time variation. Finally, fly ash-Ca(OH)2 sorbents prepared at the optimum hydration conditions were sulphated at 338 K with a synthetic gaseous mixture containing 5000 ppm SO2 and 55% relative humidity.

AB - Reactive sorbents for SO2 removal from humidified flue gas were prepared from fly ash-Ca(OH)2 mixtures using the pressure hydration technique. The fly ash samples were taken from three different coal-fired power plants in Turkey. The fly ash/Ca(OH)2 weight ratio, hydration time, and temperature were varied during the sorbent preparation step. Effects of these variations on the physical properties of activated sorbents were investigated. A statistical design technique was applied by use of a two-level factorial design matrix to interpret experimental results. It was found that increasing the temperature and fly ash/Ca(OH)2 weight ratio caused a decrease in the total surface area of sorbents. However, surface area values of sorbents were not generally affected by the hydration time variation. Finally, fly ash-Ca(OH)2 sorbents prepared at the optimum hydration conditions were sulphated at 338 K with a synthetic gaseous mixture containing 5000 ppm SO2 and 55% relative humidity.

KW - Pressure hydration

KW - Sorbent

KW - Statistical design

UR - https://www.scopus.com/pages/publications/0001487783

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DO - 10.1080/00908319808970109

M3 - Article

AN - SCOPUS:0001487783

SN - 0090-8312

VL - 20

SP - 945

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JO - Energy Sources

JF - Energy Sources

ER -

Preparation of fly ash-Ca(OH)₂ sorbents by pressure hydration for so₂ removal

Abstract

Keywords

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