Increasing seawater alkalinity using fly ash to restore the pH and the effect of temperature on seawater flue gas desulfurization

Seung Ki Back, A. H.M. Mojammal, Hyeun Ho Jo, Jin Ho Kim, Min Jae Jeong, Yong Chil Seo, Hyun Tae Joung, Seong Heon Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Wet type flue gas desulfurization (FGD) using lime or limestone is popular because of its operational simplicity and the availability of lime and limestone. Seawater FGD (SWFGD) utilizes the alkalinity of seawater, and its efficiency varies depending on the seawater alkalinity. This study examined the effects of temperature, gas/water ratio, and total alkalinity of the absorbing solution on the removal efficiency of SO 2 from flue gas by seawater. In addition, this study showed the possibility of increasing the total alkalinity of seawater using fly ash from coal power plants. The experimental results showed a 8% increase in removal efficiency, while temperature decreased by 10 °C from 25 °C under the conditions of a gas/water ratio of 100 and a resultant pH of 3. The increase in removal efficiency with increasing alkalinity was measured as 0.27%/ppm of bicarbonate alkalinity. This study showed that fly ash has the ability to increase the total alkalinity of seawater. The pH restoration experiment was conducted using fly ash and limestone. The conceptual design processes of SWFGD using NaOH, fly ash, and limestone for a 400 MW coal power plant were developed, and the material balance was calculated using ASPEN Plus software.

Original languageEnglish
JournalJournal of Material Cycles and Waste Management
DOIs
Publication statusPublished - 2019 Jan 1

Fingerprint

Alkalinity
Desulfurization
Fly ash
Flue gases
Seawater
fly ash
alkalinity
seawater
Limestone
limestone
temperature
Temperature
Lime
lime
power plant
Power plants
Coal
coal
Conceptual design
flue gas

All Science Journal Classification (ASJC) codes

  • Waste Management and Disposal
  • Mechanics of Materials

Cite this

Back, Seung Ki ; Mojammal, A. H.M. ; Jo, Hyeun Ho ; Kim, Jin Ho ; Jeong, Min Jae ; Seo, Yong Chil ; Joung, Hyun Tae ; Kim, Seong Heon. / Increasing seawater alkalinity using fly ash to restore the pH and the effect of temperature on seawater flue gas desulfurization. In: Journal of Material Cycles and Waste Management. 2019.
@article{207ff4c4fcf04dd38f7be9e97c104640,
title = "Increasing seawater alkalinity using fly ash to restore the pH and the effect of temperature on seawater flue gas desulfurization",
abstract = "Wet type flue gas desulfurization (FGD) using lime or limestone is popular because of its operational simplicity and the availability of lime and limestone. Seawater FGD (SWFGD) utilizes the alkalinity of seawater, and its efficiency varies depending on the seawater alkalinity. This study examined the effects of temperature, gas/water ratio, and total alkalinity of the absorbing solution on the removal efficiency of SO 2 from flue gas by seawater. In addition, this study showed the possibility of increasing the total alkalinity of seawater using fly ash from coal power plants. The experimental results showed a 8{\%} increase in removal efficiency, while temperature decreased by 10 °C from 25 °C under the conditions of a gas/water ratio of 100 and a resultant pH of 3. The increase in removal efficiency with increasing alkalinity was measured as 0.27{\%}/ppm of bicarbonate alkalinity. This study showed that fly ash has the ability to increase the total alkalinity of seawater. The pH restoration experiment was conducted using fly ash and limestone. The conceptual design processes of SWFGD using NaOH, fly ash, and limestone for a 400 MW coal power plant were developed, and the material balance was calculated using ASPEN Plus software.",
author = "Back, {Seung Ki} and Mojammal, {A. H.M.} and Jo, {Hyeun Ho} and Kim, {Jin Ho} and Jeong, {Min Jae} and Seo, {Yong Chil} and Joung, {Hyun Tae} and Kim, {Seong Heon}",
year = "2019",
month = "1",
day = "1",
doi = "10.1007/s10163-019-00852-2",
language = "English",
journal = "Journal of Material Cycles and Waste Management",
issn = "1438-4957",
publisher = "Springer Japan",

}

Increasing seawater alkalinity using fly ash to restore the pH and the effect of temperature on seawater flue gas desulfurization. / Back, Seung Ki; Mojammal, A. H.M.; Jo, Hyeun Ho; Kim, Jin Ho; Jeong, Min Jae; Seo, Yong Chil; Joung, Hyun Tae; Kim, Seong Heon.

In: Journal of Material Cycles and Waste Management, 01.01.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Increasing seawater alkalinity using fly ash to restore the pH and the effect of temperature on seawater flue gas desulfurization

AU - Back, Seung Ki

AU - Mojammal, A. H.M.

AU - Jo, Hyeun Ho

AU - Kim, Jin Ho

AU - Jeong, Min Jae

AU - Seo, Yong Chil

AU - Joung, Hyun Tae

AU - Kim, Seong Heon

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Wet type flue gas desulfurization (FGD) using lime or limestone is popular because of its operational simplicity and the availability of lime and limestone. Seawater FGD (SWFGD) utilizes the alkalinity of seawater, and its efficiency varies depending on the seawater alkalinity. This study examined the effects of temperature, gas/water ratio, and total alkalinity of the absorbing solution on the removal efficiency of SO 2 from flue gas by seawater. In addition, this study showed the possibility of increasing the total alkalinity of seawater using fly ash from coal power plants. The experimental results showed a 8% increase in removal efficiency, while temperature decreased by 10 °C from 25 °C under the conditions of a gas/water ratio of 100 and a resultant pH of 3. The increase in removal efficiency with increasing alkalinity was measured as 0.27%/ppm of bicarbonate alkalinity. This study showed that fly ash has the ability to increase the total alkalinity of seawater. The pH restoration experiment was conducted using fly ash and limestone. The conceptual design processes of SWFGD using NaOH, fly ash, and limestone for a 400 MW coal power plant were developed, and the material balance was calculated using ASPEN Plus software.

AB - Wet type flue gas desulfurization (FGD) using lime or limestone is popular because of its operational simplicity and the availability of lime and limestone. Seawater FGD (SWFGD) utilizes the alkalinity of seawater, and its efficiency varies depending on the seawater alkalinity. This study examined the effects of temperature, gas/water ratio, and total alkalinity of the absorbing solution on the removal efficiency of SO 2 from flue gas by seawater. In addition, this study showed the possibility of increasing the total alkalinity of seawater using fly ash from coal power plants. The experimental results showed a 8% increase in removal efficiency, while temperature decreased by 10 °C from 25 °C under the conditions of a gas/water ratio of 100 and a resultant pH of 3. The increase in removal efficiency with increasing alkalinity was measured as 0.27%/ppm of bicarbonate alkalinity. This study showed that fly ash has the ability to increase the total alkalinity of seawater. The pH restoration experiment was conducted using fly ash and limestone. The conceptual design processes of SWFGD using NaOH, fly ash, and limestone for a 400 MW coal power plant were developed, and the material balance was calculated using ASPEN Plus software.

UR - http://www.scopus.com/inward/record.url?scp=85064197344&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85064197344&partnerID=8YFLogxK

U2 - 10.1007/s10163-019-00852-2

DO - 10.1007/s10163-019-00852-2

M3 - Article

AN - SCOPUS:85064197344

JO - Journal of Material Cycles and Waste Management

JF - Journal of Material Cycles and Waste Management

SN - 1438-4957

ER -