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

被引：17

作者：

Ravutsov, Martin ^{[1
]}

Mitrev, Yavor ^{[1
]}

Shestakova, Pavletta ^{[1
]}

Lazarova, Hristina ^{[1
]}

Simeonov, Svilen ^{[1
,2
]}

Popova, Margarita ^{[1
]}

机构：

[1] Bulgarian Acad Sci, Inst Organ Chem, Ctr Phytochem, Acad G Bonchev St,Bl 9, Sofia 1113, Bulgaria

[2] Univ Lisbon, Fac Pharm, Res Inst Med iMed ULisboa, Av Prof Gama Pinto, P-1649003 Lisbon, Portugal

来源：

NANOMATERIALS | 2021年 / 11卷 / 11期

基金：

欧盟地平线“2020”;

关键词：

CO2; capture; modified mesoporous silicas; morpholine and methylpiperazine; solid-state NMR; CARBON-DIOXIDE CAPTURE; MOLECULAR-SIEVE; AMINE; SORBENTS; ADSORBENTS; FRAMEWORKS; MECHANISM;

D O I：

10.3390/nano11112831

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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, N-2 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.

引用

页数：13

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