Journal
AICHE JOURNAL
Volume 62, Issue 10, Pages 3730-3738Publisher
WILEY
DOI: 10.1002/aic.15283
Keywords
carbonized polydopamine; CO2 adsorption; isotherms; water vapor
Categories
Funding
- National Key Basic Research Program of China [2013CB733506]
- National Natural Science Foundation of China [51276065, 21436005]
- Guangdong Natural Science Foundation [2014A030312007]
- Research Foundation of State Key Lab of Subtropical Building Science of China [C715023z]
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Novel carbonized polydopamine adsorbents (C-PDAs) with high surface area, high CO2 adsorption capacity and superior moisture resistance performance were prepared by one-step synthesis method using polydopamine as carbon precursor at different KOH/C ratios, and then characterized. CO2 and water vapor adsorption performances of C-PDAs were examined separately by static adsorption and fixed-bed experiments. Results showed that BET area and pore volume of C-PDA-4 were up to 3342 m(2)/g and 2.01 cm(3)/g, respectively. Its CO2 adsorption capacity reached up to 30.5 mmol/g at 25 bar, much higher than many other adsorbents including metal-organic frameworks (MOFs). C-PDAs prepared with high KOH/C ratios had low surface element concentrations of O and N resulting in low surface hydrophilic property. H2O(g) isotherm of C-PDA was much lower than those on Mg-MOF-74, Cu-BTC, and MIL-101(Cr). Fixed-bed experiments showed that co-presence of water vapor in feed stream with 30% RH had negligible impact on CO2 working capacity of C-PDA. (C) 2016 American Institute of Chemical Engineers AIChE J, 62: 3730-3738, 2016-
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