Insights into CO2 and CH4 Adsorption by Pristine and Aromatic Amine-Modified Periodic Mesoporous Phenylene-Silicas

authors	Lourenco, MAO; Siquet, C; Santos, J; Jorge, M; Gomes, JRB; Ferreira, P
nationality	International
journal	JOURNAL OF PHYSICAL CHEMISTRY C
keywords	PRESSURE SWING ADSORPTION; CARBON-DIOXIDE CAPTURE; ACTIVATED CARBON; LANDFILL GAS; CHEMICAL-MODIFICATION; POROUS MATERIALS; ORGANIC GROUPS; BETA-ZEOLITE; NATURAL-GAS; SEPARATION
abstract	The synthesis and characterization of pristine and amine-functionalized periodic mesoporous phenylene-silicas having different pore sizes are reported. We explore the potential of these materials for CO2/CH4 separation, by studying the adsorption of pure CO2 and pure CH4 gases. The aminated periodic mesoporous phenylene-silica with the smallest pore size is the best adsorbent to CO2, presenting a Henry's constant of 0.56 mol.kg(-1).bar(-1) at 35 degrees C. However, the corresponding Henry's constant for CH4 is extremely low (0.06 mol.kg(-1).bar(-1) at 35 degrees C). There is a direct correlation between the % of T-SMP(2) silanols species and the values of the Henry's CO, constants, which may be used to theoretically predict experimental CO2 Henry's constants of potential adsorbents.
publisher	AMER CHEMICAL SOC
issn	1932-7447
year published	2016
volume	120
issue	26
beginning page	14236
ending page	14245
digital object identifier (doi)	10.1021/acs.jpcc.6b04605
web of science category	Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category	Chemistry; Science & Technology - Other Topics; Materials Science
unique article identifier	WOS:000379457000041