CO2 adsorption using amine-functionalized mesoporous silica prepared via anionic surfactant-mediated synthesis

A Review of CO2 Capture by Absorption and Adsorption

“…The direct synthesis can be carried out in acidic or basic media. Though many reports are existing for the use of APS (Che et al, 2003;Chong and Zhao, 2003;Yokoi et al, 2004;Wang et al, 2005;Yokoi et al, 2006;Kim, et al, 2008;Hao et al, 2011;Osei-Prempeh et al, 2011), 2N-APS (Wang et al, 2006;Kim et al, 2008), and 3N-APS as the amine precursors, the synthesized amine-grafted adsorbents were not used for CO 2 capture. Chong and Zhao (2003) applied the direct synthesis at acidic condition (pH < 2) to synthesize SBA-15 with controllable pore size and the desired amount of amine groups in it.…”

Preparation of carbon monoliths from orange peel for NOx retention

“…In this context, adsorption may be a potentially attractive alternative to capturing CO 2 from stationary sources and offshore applications. Various adsorbents have been investigated for such purposes, such as zeolites, activated carbons, metal-organic frameworks (MOFs) and amine-grafted silicas [2][3][4][5][6][7][8] . Furthermore, adsorbents modified with amines have been investigated as potential materials for CO 2 capture above room temperature (typically 348 K) and at low partial pressures of CO 2 9-11 .…”

“…These are the conditions often found in flue gas, which also contains water vapor and other contaminants (NO x , SO x ). This is a challenging scenario with technological solutions yet to be found 3,7,9 .…”

“…and the advantages of cell structures (e.g., low drawdown pressure, high geometric surface area, short diffusion length, etc. ), which are highly attractive for applications in adsorption, catalysis and separation 3,6 . It has been reported in the literature that monoliths can be impregnated with metals of different physicochemical characteristics, especially those that present catalytic activity; this may affect the column operating temperature and the time of gasification.…”

Mesoporous amine‐bridged polysilsesquioxane for CO2 capture

“…3 Most of advanced amine-supported sorbents up to now have been synthesized by the immobilization of amines into mesoporous supports via one of the following strategies: post-grafting, wet impregnation and cocondensation of aminosilanes and tetraalkoxysilanes. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] Although sorbents with relatively high amine loadings can be achieved, post-grafting and wet impregnation involve multi-step synthesis in which the supporting materials are separately prepared. In addition, the increase of amine content of the sorbents comes usually at the expense of surface area and pore volume available for CO 2 capture ultimately compromising the performance of the sorbents.…”