CO2 gas absorption by CH3OH based nanofluids in an annular contactor at low rotational speeds

Israel Torres Pineda, Chang Kyoung Choi, Yong Tae Kang

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

In this work, carbon dioxide (CO2) absorption experiments are performed in a custom designed vertical annular contactor (AC) at low rotational speeds. Methanol is used as solvent and Al2O3, SiO2 and TiO2 nanoparticles are combined with the methanol to produce nanofluids. The AC performance is compared to that of a modified version in which trays are added to enhance the CO2 absorption rate (T-AC). Experiments in co-current and counter-current flows are carried out. In addition, two-phase flow patterns in the AC and in the modified version are analyzed by using a high speed visualization system. The results show no effect on the absorption rate for pure methanol at Reω<17,000. In the counter-current flow, however, nanofluids show a better performance in the AC with maximum enhancements of 4.6% for TiO2, 1.2% for Al2O3 and 1.1% for SiO2 compared to pure methanol. The addition of trays enhances the CO2 absorption rate up to 9%, 10%, 6% and 5% for pure methanol, Al2O3, SiO2, and TiO2, respectively for the counter-current flow. Likewise, the highest rotation effectiveness is found in the T-AC for Al2O3 and TiO2 with 24.2% and 14.4%, respectively.

Original languageEnglish
Pages (from-to)105-112
Number of pages8
JournalInternational Journal of Greenhouse Gas Control
Volume23
DOIs
Publication statusPublished - 2014 Jan 1

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Gas absorption
methanol
Methanol
countercurrent
gas
two phase flow
Two phase flow
flow pattern
Flow patterns
visualization
Carbon dioxide
Visualization
carbon dioxide
experiment
Experiments
speed
Nanoparticles
rate

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Pollution
  • Energy(all)
  • Management, Monitoring, Policy and Law

Cite this

CO2 gas absorption by CH3OH based nanofluids in an annular contactor at low rotational speeds. / Pineda, Israel Torres; Choi, Chang Kyoung; Kang, Yong Tae.

In: International Journal of Greenhouse Gas Control, Vol. 23, 01.01.2014, p. 105-112.

Research output: Contribution to journalArticle

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abstract = "In this work, carbon dioxide (CO2) absorption experiments are performed in a custom designed vertical annular contactor (AC) at low rotational speeds. Methanol is used as solvent and Al2O3, SiO2 and TiO2 nanoparticles are combined with the methanol to produce nanofluids. The AC performance is compared to that of a modified version in which trays are added to enhance the CO2 absorption rate (T-AC). Experiments in co-current and counter-current flows are carried out. In addition, two-phase flow patterns in the AC and in the modified version are analyzed by using a high speed visualization system. The results show no effect on the absorption rate for pure methanol at Reω<17,000. In the counter-current flow, however, nanofluids show a better performance in the AC with maximum enhancements of 4.6{\%} for TiO2, 1.2{\%} for Al2O3 and 1.1{\%} for SiO2 compared to pure methanol. The addition of trays enhances the CO2 absorption rate up to 9{\%}, 10{\%}, 6{\%} and 5{\%} for pure methanol, Al2O3, SiO2, and TiO2, respectively for the counter-current flow. Likewise, the highest rotation effectiveness is found in the T-AC for Al2O3 and TiO2 with 24.2{\%} and 14.4{\%}, respectively.",
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