@article{acf51774998e4e0fa52d0c90b9a0dd84,
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. ",
keywords = "Moisture determination, Silica, Flow of gases, Moisture",
author = "Wijesiri, {Romesh P.} and Knowles, {Gregory P.} and Hasina Yeasmin and Hoadley, {Andrew F.A.} and Chaffee, {Alan L.}",
year = "2019",
month = feb,
day = "27",
doi = "10.1021/acs.iecr.8b04973",
language = "English",
volume = "58",
pages = "3293--3303",
journal = "Industrial & Engineering Chemistry Research",
issn = "0888-5885",
publisher = "American Chemical Society",
number = "8",
}