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Other research product . Article . 2021

CO2 Adsorption on Modified Mesoporous Silicas: The Role of the Adsorption Sites

Martin Ravutsov; Yavor Mitrev; Pavletta Shestakova; Hristina Lazarova; Svilen P. Simeonov; Margarita Popova;
Open Access
Published: 01 Oct 2021 Journal: Nanomaterials, volume 11, issue 2,831 (issn: 2079-4991, Copyright policy )
Publisher: MDPI
Country: Bulgaria

The post-synthesis procedure for cyclic amine (morpholine and 1-methylpiperazine) modified mesoporous MCM-48 and SBA-15 silicas was developed. The procedure for preparation of the modified mesoporous materials does not affect the structural characteristics of the initial mesoporous silicas strongly. The initial and modified materials were characterized by XRD, N2 physisorption, thermal analysis, and solid-state NMR. The CO2 adsorption of the obtained materials was tested under dynamic and equilibrium conditions. The NMR data revealed the formation of different CO2 adsorbed forms. The materials exhibited high CO2 absorption capacity lying above the benchmark value of 2 mmol/g and stretching out to the outstanding 4.4 mmol/g in the case of 1-methylpiperazin modified MCM-48. The materials are reusable, and their CO2 adsorption capacities are slightly lower in three adsorption/desorption cycles.

Subjects by Vocabulary

Microsoft Academic Graph classification: Thermal analysis Solid-state nuclear magnetic resonance Mesoporous material Adsorption Chemical engineering Amine gas treating Physisorption Morpholine chemistry.chemical_compound chemistry Materials science Desorption


CO<sub>2</sub> capture, modified mesoporous silicas, morpholine and methylpiperazine, solid-state NMR, Chemistry, QD1-999, General Materials Science, General Chemical Engineering, Article, CO2 capture, CO2 capture, modified mesoporous silicas, morpholine and methylpiperazine, solidstate NMR

Funded by
EC| Biomass4Synthons
Straightening training, research and innovation capacities in the valorization of bio-renewable resource
  • Funder: European Commission (EC)
  • Project Code: 951996
  • Funding stream: H2020 | CSA
Validated by funder
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Heritage Science