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 language | English |
|---|---|
| Pages (from-to) | 3293-3303 |
| Number of pages | 11 |
| Journal | Industrial and Engineering Chemistry Research |
| Volume | 58 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 27 Feb 2019 |
Keywords
- Moisture determination
- Silica
- Flow of gases
- Moisture
Cite this
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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 journal › Article › Research › peer-review
TY - JOUR
T1 - CO 2 Capture from Air Using Pelletized Polyethylenimine Impregnated MCF Silica
AU - Wijesiri, Romesh P.
AU - Knowles, Gregory P.
AU - Yeasmin, Hasina
AU - Hoadley, Andrew F.A.
AU - Chaffee, Alan L.
PY - 2019/2/27
Y1 - 2019/2/27
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
KW - Silica
KW - Flow of gases
KW - Moisture
UR - http://www.scopus.com/inward/record.url?scp=85062401037&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.8b04973
DO - 10.1021/acs.iecr.8b04973
M3 - Article
VL - 58
SP - 3293
EP - 3303
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
SN - 0888-5885
IS - 8
ER -