Development of slurry bubble column with lithium silicate to recover hot CO 2 gas from flue gas

Yugo Kanai, Koichi Terasaka, Masato Suwabe, Satoko Fujioka, Daisuke Kobayashi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

To reduce the release of greenhouse gas from massive emission sources into atmosphere, a slurry bubble column suspending lithium silicate is proposed to remove hot CO 2 from flue gas or pre-combustion effluent gas. As the liquid phase, the molten salt consisting of binary carbonates was used. The slurry suspending solid particles of lithium silicate in the molten salt promoted to mix gas and slurry in the column so that the absorption rate of CO 2 was improved. In this study, the effects of some important operating conditions such as superflcial flue gas velocity, the concentration of lithium silicate powder in the slurry and the height of the slurry on CO 2 absorption were investigated to optimize the system. The CO 2 absorption increased with increasing superflcial gas velocity and decreasing slurry concentration. Fractional CO 2 recovery increased with increasing the height of the slurry. The apparent rate constant and the apparent activation energy were determined in the reaction system. Moreover, an endurance test was conducted to confirm stable recovery capacity, in which the proposed CO 2 recovering system performance was repeatedly maintained.

Original languageEnglish
Pages (from-to)639-644
Number of pages6
JournalJournal of Chemical Engineering of Japan
Volume45
Issue number9
Publication statusPublished - 2012

Fingerprint

Silicates
Bubble columns
Carbon Monoxide
Flue gases
Lithium
Gases
Molten materials
Salts
Recovery
Greenhouse gases
Effluents
Carbonates
Rate constants
Durability
Activation energy
Powders
Liquids

Keywords

  • Chemical Absorption
  • CO Recovery
  • Lithium Silicate
  • Molten Salt
  • Slurry Bubble Column

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Development of slurry bubble column with lithium silicate to recover hot CO 2 gas from flue gas. / Kanai, Yugo; Terasaka, Koichi; Suwabe, Masato; Fujioka, Satoko; Kobayashi, Daisuke.

In: Journal of Chemical Engineering of Japan, Vol. 45, No. 9, 2012, p. 639-644.

Research output: Contribution to journalArticle

@article{f47fe658b3ab4da5876c1ce02132d132,
title = "Development of slurry bubble column with lithium silicate to recover hot CO 2 gas from flue gas",
abstract = "To reduce the release of greenhouse gas from massive emission sources into atmosphere, a slurry bubble column suspending lithium silicate is proposed to remove hot CO 2 from flue gas or pre-combustion effluent gas. As the liquid phase, the molten salt consisting of binary carbonates was used. The slurry suspending solid particles of lithium silicate in the molten salt promoted to mix gas and slurry in the column so that the absorption rate of CO 2 was improved. In this study, the effects of some important operating conditions such as superflcial flue gas velocity, the concentration of lithium silicate powder in the slurry and the height of the slurry on CO 2 absorption were investigated to optimize the system. The CO 2 absorption increased with increasing superflcial gas velocity and decreasing slurry concentration. Fractional CO 2 recovery increased with increasing the height of the slurry. The apparent rate constant and the apparent activation energy were determined in the reaction system. Moreover, an endurance test was conducted to confirm stable recovery capacity, in which the proposed CO 2 recovering system performance was repeatedly maintained.",
keywords = "Chemical Absorption, CO Recovery, Lithium Silicate, Molten Salt, Slurry Bubble Column",
author = "Yugo Kanai and Koichi Terasaka and Masato Suwabe and Satoko Fujioka and Daisuke Kobayashi",
year = "2012",
language = "English",
volume = "45",
pages = "639--644",
journal = "Journal of Chemical Engineering of Japan",
issn = "0021-9592",
publisher = "Society of Chemical Engineers, Japan",
number = "9",

}

TY - JOUR

T1 - Development of slurry bubble column with lithium silicate to recover hot CO 2 gas from flue gas

AU - Kanai, Yugo

AU - Terasaka, Koichi

AU - Suwabe, Masato

AU - Fujioka, Satoko

AU - Kobayashi, Daisuke

PY - 2012

Y1 - 2012

N2 - To reduce the release of greenhouse gas from massive emission sources into atmosphere, a slurry bubble column suspending lithium silicate is proposed to remove hot CO 2 from flue gas or pre-combustion effluent gas. As the liquid phase, the molten salt consisting of binary carbonates was used. The slurry suspending solid particles of lithium silicate in the molten salt promoted to mix gas and slurry in the column so that the absorption rate of CO 2 was improved. In this study, the effects of some important operating conditions such as superflcial flue gas velocity, the concentration of lithium silicate powder in the slurry and the height of the slurry on CO 2 absorption were investigated to optimize the system. The CO 2 absorption increased with increasing superflcial gas velocity and decreasing slurry concentration. Fractional CO 2 recovery increased with increasing the height of the slurry. The apparent rate constant and the apparent activation energy were determined in the reaction system. Moreover, an endurance test was conducted to confirm stable recovery capacity, in which the proposed CO 2 recovering system performance was repeatedly maintained.

AB - To reduce the release of greenhouse gas from massive emission sources into atmosphere, a slurry bubble column suspending lithium silicate is proposed to remove hot CO 2 from flue gas or pre-combustion effluent gas. As the liquid phase, the molten salt consisting of binary carbonates was used. The slurry suspending solid particles of lithium silicate in the molten salt promoted to mix gas and slurry in the column so that the absorption rate of CO 2 was improved. In this study, the effects of some important operating conditions such as superflcial flue gas velocity, the concentration of lithium silicate powder in the slurry and the height of the slurry on CO 2 absorption were investigated to optimize the system. The CO 2 absorption increased with increasing superflcial gas velocity and decreasing slurry concentration. Fractional CO 2 recovery increased with increasing the height of the slurry. The apparent rate constant and the apparent activation energy were determined in the reaction system. Moreover, an endurance test was conducted to confirm stable recovery capacity, in which the proposed CO 2 recovering system performance was repeatedly maintained.

KW - Chemical Absorption

KW - CO Recovery

KW - Lithium Silicate

KW - Molten Salt

KW - Slurry Bubble Column

UR - http://www.scopus.com/inward/record.url?scp=84867858228&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84867858228&partnerID=8YFLogxK

M3 - Article

VL - 45

SP - 639

EP - 644

JO - Journal of Chemical Engineering of Japan

JF - Journal of Chemical Engineering of Japan

SN - 0021-9592

IS - 9

ER -