Effect of surface group functionalization on the CO2/N 2 separation properties of MCM-41: A grand-canonical Monte Carlo simulation study

Jennifer J. Williams; Andrew D. Wiersum; Nigel A. Seaton; Tina Düren

doi:10.1021/jp105464u

Effect of surface group functionalization on the CO₂/N ₂ separation properties of MCM-41: A grand-canonical Monte Carlo simulation study

Jennifer J. Williams, Andrew D. Wiersum, Nigel A. Seaton, Tina Düren

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

25 Citations (SciVal)

Abstract

Mesoporous adsorbents such as MCM-41 are promising materials for use in the separation stage of carbon capture and storage (CCS). Using molecular simulation, we investigated the effectiveness of functionalizing MCM-41 with organic surface groups for CO₂/N₂ separation from a typical power-plant flue-gas stream. The adsorption isotherms for pure CO ₂ and ternary flue-gas mixtures were determined in functionalized MCM-41 using grand-canonical Monte Carlo (GCMC) simulations. Both CO₂ uptake capacities and CO₂/N₂ selectivities were studied in order to predict the performance of functionalized materials in the removal of CO₂ from flue gases. The effects of pore size, surface group concentration, alkyl chain length, surface group rigidity, and concentration of polar amino moieties on adsorption were studied in detail. Surface functionalization of MCM-41 resulted in materials exhibiting a wide range of CO₂/N₂ selectivities. Insight from these simulations allowed for the design of a tailor-made surface group encompassing favorable characteristics that was predicted to perform significantly better than the unfunctionalized MCM-41 material in carbon-capture applications.

Original language	English
Pages (from-to)	18538-18547
Number of pages	10
Journal	Journal of Physical Chemistry C
Volume	114
Issue number	43
Early online date	12 Oct 2010
DOIs	https://doi.org/10.1021/jp105464u
Publication status	Published - 4 Nov 2010

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Electronic, Optical and Magnetic Materials
Surfaces, Coatings and Films
Energy(all)

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title = "Effect of surface group functionalization on the CO2/N 2 separation properties of MCM-41: A grand-canonical Monte Carlo simulation study",

abstract = "Mesoporous adsorbents such as MCM-41 are promising materials for use in the separation stage of carbon capture and storage (CCS). Using molecular simulation, we investigated the effectiveness of functionalizing MCM-41 with organic surface groups for CO2/N2 separation from a typical power-plant flue-gas stream. The adsorption isotherms for pure CO 2 and ternary flue-gas mixtures were determined in functionalized MCM-41 using grand-canonical Monte Carlo (GCMC) simulations. Both CO2 uptake capacities and CO2/N2 selectivities were studied in order to predict the performance of functionalized materials in the removal of CO2 from flue gases. The effects of pore size, surface group concentration, alkyl chain length, surface group rigidity, and concentration of polar amino moieties on adsorption were studied in detail. Surface functionalization of MCM-41 resulted in materials exhibiting a wide range of CO2/N2 selectivities. Insight from these simulations allowed for the design of a tailor-made surface group encompassing favorable characteristics that was predicted to perform significantly better than the unfunctionalized MCM-41 material in carbon-capture applications.",

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AU - Düren, Tina

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N2 - Mesoporous adsorbents such as MCM-41 are promising materials for use in the separation stage of carbon capture and storage (CCS). Using molecular simulation, we investigated the effectiveness of functionalizing MCM-41 with organic surface groups for CO2/N2 separation from a typical power-plant flue-gas stream. The adsorption isotherms for pure CO 2 and ternary flue-gas mixtures were determined in functionalized MCM-41 using grand-canonical Monte Carlo (GCMC) simulations. Both CO2 uptake capacities and CO2/N2 selectivities were studied in order to predict the performance of functionalized materials in the removal of CO2 from flue gases. The effects of pore size, surface group concentration, alkyl chain length, surface group rigidity, and concentration of polar amino moieties on adsorption were studied in detail. Surface functionalization of MCM-41 resulted in materials exhibiting a wide range of CO2/N2 selectivities. Insight from these simulations allowed for the design of a tailor-made surface group encompassing favorable characteristics that was predicted to perform significantly better than the unfunctionalized MCM-41 material in carbon-capture applications.

AB - Mesoporous adsorbents such as MCM-41 are promising materials for use in the separation stage of carbon capture and storage (CCS). Using molecular simulation, we investigated the effectiveness of functionalizing MCM-41 with organic surface groups for CO2/N2 separation from a typical power-plant flue-gas stream. The adsorption isotherms for pure CO 2 and ternary flue-gas mixtures were determined in functionalized MCM-41 using grand-canonical Monte Carlo (GCMC) simulations. Both CO2 uptake capacities and CO2/N2 selectivities were studied in order to predict the performance of functionalized materials in the removal of CO2 from flue gases. The effects of pore size, surface group concentration, alkyl chain length, surface group rigidity, and concentration of polar amino moieties on adsorption were studied in detail. Surface functionalization of MCM-41 resulted in materials exhibiting a wide range of CO2/N2 selectivities. Insight from these simulations allowed for the design of a tailor-made surface group encompassing favorable characteristics that was predicted to perform significantly better than the unfunctionalized MCM-41 material in carbon-capture applications.

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Effect of surface group functionalization on the CO₂/N ₂ separation properties of MCM-41: A grand-canonical Monte Carlo simulation study

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