Insights into the Adsorption of Carbon Dioxide in the Presence of Water Vapor Utilizing a Low Molecular Weight Polyethylenimine-Impregnated CARiACT Silica Sorbent
| Autor: | Lawrence J. Shadle, Esmail R. Monazam, Ronald W. Breault, Daniel J. Fauth, Samuel Bayham |
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| Rok vydání: | 2017 |
| Předmět: |
Thermogravimetric analysis
Polyethylenimine Reaction mechanism Sorbent Chemistry General Chemical Engineering Inorganic chemistry Humidity 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences chemistry.chemical_compound Adsorption Anhydrous 0210 nano-technology Water vapor |
| Zdroj: | Industrial & Engineering Chemistry Research. 56:9054-9064 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/acs.iecr.7b01271 |
| Popis: | Thermogravimetric analysis was employed to investigate the CO2 and H2O adsorption rates and water vapor equilibrium on anhydrous and prehydrate linear polyethylenimine (LPEI) sorbent impregnated within a commercially functional CARiACT G10 (HPV) silica support. Water vapor experiments utilizing specific humidities of 2%, 8%, and 16% in contact with an anhydrous PEI sorbent resulted in proportional quantities of water vapor uptake. Subsequently, both anhydrous and prehydrated PEI-impregnated sorbents were made available to identical humidified gaseous streams containing a CO2 concentration of 10% at 60 °C. CO2 capacity increased dramatically in the presence of different levels of humidity. Various kinetic models were systematically employed to interpret the experimental data including single- and multiple-step models. The rate data was best represented by a reaction mechanism pathway involving the interplay of CO2 with PEI-impregnated sorbents exhibiting a quick adsorption phase followed by a slow approach... |
| Databáze: | OpenAIRE |
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