CO 2 Capture from Air Using Pelletized Polyethylenimine Impregnated MCF Silica

Romesh P. Wijesiri, Gregory P. Knowles, Hasina Yeasmin, Andrew F.A. Hoadley, Alan L. Chaffee

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)

Abstract

Two polyethylenimine impregnated mesocellular foam silica sorbents (PEI-80a and PEI-80b) were evaluated for capturing CO 2 from 420 ppm of CO 2 in N 2 under both dry and humid conditions. A fixed bed adsorption setup was used to evaluate the CO 2 uptake under isothermal conditions between 33 and 81 °C with a gas flow of 200 mL/min. Under dry conditions, the highest capacity was observed at 46 and 52 °C for PEI-80a (1.29 mmol/g) and at 46 °C for PEI-80b (1.94 mmol/g). There was negligible uptake of CO 2 at 81 °C, indicating possible regeneration at relatively low temperatures. For PEI-80b, the introduction of moisture (0.5 and 2% mol-H 2 O in feed gas) yielded up to 53% enhancement in capacity. Higher moisture levels (3% mol-H 2 O) appeared to be detrimental to the CO 2 uptake. The highest capacity of 2.52 mmol/g was achieved at a temperature of 46 °C and a moisture level of 2% mol-H 2 O.

Original languageEnglish
Pages (from-to)3293-3303
Number of pages11
JournalIndustrial and Engineering Chemistry Research
Volume58
Issue number8
DOIs
Publication statusPublished - 27 Feb 2019

Keywords

  • Moisture determination
  • Silica
  • Flow of gases
  • Moisture

Cite this

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title = "CO 2 Capture from Air Using Pelletized Polyethylenimine Impregnated MCF Silica",
abstract = "Two polyethylenimine impregnated mesocellular foam silica sorbents (PEI-80a and PEI-80b) were evaluated for capturing CO 2 from 420 ppm of CO 2 in N 2 under both dry and humid conditions. A fixed bed adsorption setup was used to evaluate the CO 2 uptake under isothermal conditions between 33 and 81 °C with a gas flow of 200 mL/min. Under dry conditions, the highest capacity was observed at 46 and 52 °C for PEI-80a (1.29 mmol/g) and at 46 °C for PEI-80b (1.94 mmol/g). There was negligible uptake of CO 2 at 81 °C, indicating possible regeneration at relatively low temperatures. For PEI-80b, the introduction of moisture (0.5 and 2{\%} mol-H 2 O in feed gas) yielded up to 53{\%} enhancement in capacity. Higher moisture levels (3{\%} mol-H 2 O) appeared to be detrimental to the CO 2 uptake. The highest capacity of 2.52 mmol/g was achieved at a temperature of 46 °C and a moisture level of 2{\%} mol-H 2 O.",
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CO 2 Capture from Air Using Pelletized Polyethylenimine Impregnated MCF Silica. / Wijesiri, Romesh P.; Knowles, Gregory P.; Yeasmin, Hasina; Hoadley, Andrew F.A.; Chaffee, Alan L.

In: Industrial and Engineering Chemistry Research, Vol. 58, No. 8, 27.02.2019, p. 3293-3303.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

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AU - Wijesiri, Romesh P.

AU - Knowles, Gregory P.

AU - Yeasmin, Hasina

AU - Hoadley, Andrew F.A.

AU - Chaffee, Alan L.

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N2 - Two polyethylenimine impregnated mesocellular foam silica sorbents (PEI-80a and PEI-80b) were evaluated for capturing CO 2 from 420 ppm of CO 2 in N 2 under both dry and humid conditions. A fixed bed adsorption setup was used to evaluate the CO 2 uptake under isothermal conditions between 33 and 81 °C with a gas flow of 200 mL/min. Under dry conditions, the highest capacity was observed at 46 and 52 °C for PEI-80a (1.29 mmol/g) and at 46 °C for PEI-80b (1.94 mmol/g). There was negligible uptake of CO 2 at 81 °C, indicating possible regeneration at relatively low temperatures. For PEI-80b, the introduction of moisture (0.5 and 2% mol-H 2 O in feed gas) yielded up to 53% enhancement in capacity. Higher moisture levels (3% mol-H 2 O) appeared to be detrimental to the CO 2 uptake. The highest capacity of 2.52 mmol/g was achieved at a temperature of 46 °C and a moisture level of 2% mol-H 2 O.

AB - Two polyethylenimine impregnated mesocellular foam silica sorbents (PEI-80a and PEI-80b) were evaluated for capturing CO 2 from 420 ppm of CO 2 in N 2 under both dry and humid conditions. A fixed bed adsorption setup was used to evaluate the CO 2 uptake under isothermal conditions between 33 and 81 °C with a gas flow of 200 mL/min. Under dry conditions, the highest capacity was observed at 46 and 52 °C for PEI-80a (1.29 mmol/g) and at 46 °C for PEI-80b (1.94 mmol/g). There was negligible uptake of CO 2 at 81 °C, indicating possible regeneration at relatively low temperatures. For PEI-80b, the introduction of moisture (0.5 and 2% mol-H 2 O in feed gas) yielded up to 53% enhancement in capacity. Higher moisture levels (3% mol-H 2 O) appeared to be detrimental to the CO 2 uptake. The highest capacity of 2.52 mmol/g was achieved at a temperature of 46 °C and a moisture level of 2% mol-H 2 O.

KW - Moisture determination

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KW - Flow of gases

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