TY - JOUR
T1 - CO2 adsorption at high pressures in MCM-41 and derived alkali-containing samples
T2 - the role of the textural properties and chemical affinity
AU - Ramírez-Moreno, Margarita J.
AU - Romero-Ibarra, Issis C.
AU - González-de Gortari, Mateo
AU - Hernández-Pérez, Ángeles
AU - Pfeiffer, Heriberto
N1 - Publisher Copyright:
© 2016, Springer Science+Business Media New York.
PY - 2016/10/1
Y1 - 2016/10/1
N2 - The adsorption properties of N2 and CO2 of MCM-41 and derived alkali-containing samples were analyzed over a wide range of pressures (up to ~4500 kPa) and temperatures (between 30 and 300 °C). The high-pressure and high-temperature experiments were carried out on pure MCM-41 and K- and Na-impregnated derived samples. It was analyzed the influence of pressure and temperature on the CO2 capture capacity on pure and impregnated samples. The adsorption performance was correlated to the structure and textural properties of the materials using X-ray diffraction and N2 adsorption–desorption measurements. The addition of an alkaline element changes the textural properties of the material increasing the pore size, which positively affected the CO2 adsorption capacity of these materials at high pressure. In addition, the isosteric heats of adsorption gave information about the chemical affinity between the impregnated materials and CO2. The CO2 adsorption at ~ 4500 kPa for the samples with 5 wt% Na at 100 and 200 °C were 77.98 and 9.79 mmol g−1, respectively, while the pure MCM-41 adsorbs only 8.92 mmol g−1.
AB - The adsorption properties of N2 and CO2 of MCM-41 and derived alkali-containing samples were analyzed over a wide range of pressures (up to ~4500 kPa) and temperatures (between 30 and 300 °C). The high-pressure and high-temperature experiments were carried out on pure MCM-41 and K- and Na-impregnated derived samples. It was analyzed the influence of pressure and temperature on the CO2 capture capacity on pure and impregnated samples. The adsorption performance was correlated to the structure and textural properties of the materials using X-ray diffraction and N2 adsorption–desorption measurements. The addition of an alkaline element changes the textural properties of the material increasing the pore size, which positively affected the CO2 adsorption capacity of these materials at high pressure. In addition, the isosteric heats of adsorption gave information about the chemical affinity between the impregnated materials and CO2. The CO2 adsorption at ~ 4500 kPa for the samples with 5 wt% Na at 100 and 200 °C were 77.98 and 9.79 mmol g−1, respectively, while the pure MCM-41 adsorbs only 8.92 mmol g−1.
KW - CO sorption
KW - High pressure
KW - MCM-41
KW - Mesoporous molecular sieve
UR - http://www.scopus.com/inward/record.url?scp=84962701420&partnerID=8YFLogxK
U2 - 10.1007/s10934-016-0173-4
DO - 10.1007/s10934-016-0173-4
M3 - Artículo
AN - SCOPUS:84962701420
SN - 1380-2224
VL - 23
SP - 1155
EP - 1162
JO - Journal of Porous Materials
JF - Journal of Porous Materials
IS - 5
ER -