Effects of different structure-directing agents (SDA) in MCM-41 on the adsorption of CO2
| dc.contributor.author | Melo, Marcus Antonio de Freitas | |
| dc.contributor.author | Costa, C. C. | |
| dc.contributor.author | Melo, Dulce Maria de Araújo | |
| dc.contributor.author | Mendoza, M. E. | |
| dc.contributor.author | Nascimento, J. C. | |
| dc.contributor.author | Andrade, J. M. | |
| dc.contributor.author | Barros, J. M. F. | |
| dc.date.accessioned | 2021-12-21T15:57:23Z | |
| dc.date.available | 2021-12-21T15:57:23Z | |
| dc.date.issued | 2014 | |
| dc.description.resumo | CO2 capturing technologies have attracted significant attention in order to limit emissions and reduce their negative effect on the environment. Mesoporous silica materials (MCM-41) are easily recyclable, affordable, and thermally and mechanically stable, providing added benefits in CO2 capture. However, further studies are necessary to characterize the effects of MCM-41 pore size, adsorption temperature and surface silylation on CO2 adsorption efficiency. In this work, mesoporous silica is synthesized using alkyltrimethylammonium bromide with different chain lengths (CnH2n ? 1 N(CH3)3Br, n = 14, 16 and 18) as structure-directing agents, and the adsorption capacity of CO2 on TTMCM-41 (C17H38NBr), CTMCM-41 (C19H42 NBr), DTMCM-41(C21H46NBr) samples was measured gravimetrically at room temperature and pressure up to 40 bar. The silica structures were characterized by X-ray diffraction (XRD), nitrogen adsorption/desorption, Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy and transmission electron microscopy (TEM). The XRD, N2 adsorption– desorption and TEM measurements indicated the presence of a well-ordered hexagonal array with uniform mesostructures. The mesoporous silica obtained, denoted as TTMCM-41, CTMCM-41 and DTMCM-41, had distinct physical properties, such as BET surface area, hexagonal unit cell, pore volume, pore diameter and pore wall thickness. CTMCM-41 exhibited an adsorption capacity (0.58 g CO2/g adsorbent) of more than DTMCM-41 (0.48 g CO2/g adsorbent) and TTMCM-41 (0.42 g CO2/g adsorbent). The results suggest that CTMCM-41 can be a better mesoporous adsorbent for CO2 adsorption. | pt_BR |
| dc.identifier.citation | BRAGA, RENATA M. ; COSTA, TIAGO R. ; FREITAS, JULIO C. O. ; BARROS, JOANA M. F. ; MELO, DULCE M. A. ; MELO, MARCUS A. F. . Pyrolysis kinetics of elephant grass pretreated biomasses. Journal of Thermal Analysis and Calorimetry, v. 117, p. 1341-1348, 2014. Disponivel em: https://link.springer.com/article/10.1007/s10973-014-3884-2 Acesso em 01 set 2021. | pt_BR |
| dc.identifier.doi | 10.1007/s10934-014-9857-9 | |
| dc.identifier.issn | Electronic: 1573-4854 | |
| dc.identifier.uri | https://repositorio.ufrn.br/handle/123456789/45531 | |
| dc.language | en | pt_BR |
| dc.publisher | Journal of Porous Materials | pt_BR |
| dc.rights | Attribution 3.0 Brazil | * |
| dc.rights.uri | http://creativecommons.org/licenses/by/3.0/br/ | * |
| dc.subject | MCM-41 | pt_BR |
| dc.subject | CO2 adsorption | pt_BR |
| dc.subject | Hydrothermal synthesis | pt_BR |
| dc.subject | Mesoporous material | pt_BR |
| dc.title | Effects of different structure-directing agents (SDA) in MCM-41 on the adsorption of CO2 | pt_BR |
| dc.type | article | pt_BR |
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