Sulfonate-Grafted Porous Polymer Networks for Preferential CO2 Adsorption at Low Pressure

A porous polymer network (PPN) grafted with sulfonic acid (PPN-6-SO3H) and its lithium salt (PPN-6-SO3Li) exhibit significant increases in isosteric heats of CO2 adsorption and CO2-uptake capacities. IAST calculations using single-component-isotherm data and a 15/85 CO2/N2 ratio at 295 K and 1 bar r...

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Bibliographic Details
Published inJournal of the American Chemical Society Vol. 133; no. 45; pp. 18126 - 18129
Main Authors Lu, Weigang, Yuan, Daqiang, Sculley, Julian, Zhao, Dan, Krishna, Rajamani, Zhou, Hong-Cai
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 16.11.2011
Subjects
Adsorption
Carbon Dioxide - chemistry
Nitrogen - chemistry
Polymers - chemistry
Porosity
Pressure
Sulfonic Acids - chemistry
Surface Properties
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Summary:A porous polymer network (PPN) grafted with sulfonic acid (PPN-6-SO3H) and its lithium salt (PPN-6-SO3Li) exhibit significant increases in isosteric heats of CO2 adsorption and CO2-uptake capacities. IAST calculations using single-component-isotherm data and a 15/85 CO2/N2 ratio at 295 K and 1 bar revealed that the sulfonate-grafted PPN-6 networks show exceptionally high adsorption selectivity for CO2 over N2 (155 and 414 for PPN-6-SO3H and PPN-6-SO3Li, respectively). Since these PPNs also possess ultrahigh physicochemical stability, practical applications in postcombustion capture of CO2 lie well within the realm of possibility.
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ISSN:0002-7863
1520-5126
1520-5126
DOI:10.1021/ja2087773