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Title: Probing the Role of Zr Addition versus Textural Properties in Enhancement of CO 2 Adsorption Performance in Silica/PEI Composite Sorbents

Abstract

Polymeric amines such as poly(ethylenimine) (PEI) supported on mesoporous oxides are promising candidate adsorbents for CO 2 capture processes. One important aspect to the design and optimization of these materials is a fundamental understanding of how the properties of the oxide support such as pore structure, particle morphology, and surface properties affect the efficiency of the guest polymer in its interactions with CO 2. Previously, the efficiency of impregnated PEI to adsorb CO 2 was shown to increase upon the addition of Zr as a surface modifier in SBA-15. But, the efficacy of this method to tune the adsorption performance has not been explored in materials of differing textural and morphological nature. These issues are directly addressed via the preparation of an array of SBA-15 support materials with varying textural and morphological properties, as well as varying content of zirconium doped into the material. Zirconium is incorporated into the SBA-15 either during the synthesis of the SBA-15, or postsynthetically via deposition of Zr species onto pure-silica SBA-15. The method of Zr incorporation alters the textural and morphological properties of the parent SBA-15 in different ways. Importantly, the CO 2 capacity of SBA-15 impregnated with PEI increases by a maximum ofmore » ~60% with the quantity of doped Zr for a “standard” SBA-15 containing significant microporosity, while no increase in the CO 2 capacity is observed upon Zr incorporation for an SBA-15 with reduced microporosity and a larger pore size, pore volume, and particle size. Finally, adsorbents supported on SBA-15 with controlled particle morphology show only modest increases in CO 2 capacity upon inclusion of Zr to the silica framework. The data demonstrate that the textural and morphological properties of the support have a more significant impact on the ability of PEI to capture CO 2 than the support surface composition.« less

Authors:
 [1];  [1];  [1];  [1];  [2];  [3];  [1]
  1. Georgia Inst. of Technology, Atlanta, GA (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Understanding and Control of Acid Gas-induced Evolution of Materials for Energy (UNCAGE-ME)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1286962
Grant/Contract Number:  
AC05-00OR22725; SC0012577
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Langmuir
Additional Journal Information:
Journal Volume: 31; Journal Issue: 34; Journal ID: ISSN 0743-7463
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE

Citation Formats

Sakwa-Novak, Miles A., Holewinski, Adam, Hoyt, Caroline B., Yoo, Chun-Jae, Chai, Song-Hai, Dai, Sheng, and Jones, Christopher W. Probing the Role of Zr Addition versus Textural Properties in Enhancement of CO 2 Adsorption Performance in Silica/PEI Composite Sorbents. United States: N. p., 2015. Web. doi:10.1021/acs.langmuir.5b02114.
Sakwa-Novak, Miles A., Holewinski, Adam, Hoyt, Caroline B., Yoo, Chun-Jae, Chai, Song-Hai, Dai, Sheng, & Jones, Christopher W. Probing the Role of Zr Addition versus Textural Properties in Enhancement of CO 2 Adsorption Performance in Silica/PEI Composite Sorbents. United States. doi:10.1021/acs.langmuir.5b02114.
Sakwa-Novak, Miles A., Holewinski, Adam, Hoyt, Caroline B., Yoo, Chun-Jae, Chai, Song-Hai, Dai, Sheng, and Jones, Christopher W. Sat . "Probing the Role of Zr Addition versus Textural Properties in Enhancement of CO 2 Adsorption Performance in Silica/PEI Composite Sorbents". United States. doi:10.1021/acs.langmuir.5b02114. https://www.osti.gov/servlets/purl/1286962.
@article{osti_1286962,
title = {Probing the Role of Zr Addition versus Textural Properties in Enhancement of CO 2 Adsorption Performance in Silica/PEI Composite Sorbents},
author = {Sakwa-Novak, Miles A. and Holewinski, Adam and Hoyt, Caroline B. and Yoo, Chun-Jae and Chai, Song-Hai and Dai, Sheng and Jones, Christopher W.},
abstractNote = {Polymeric amines such as poly(ethylenimine) (PEI) supported on mesoporous oxides are promising candidate adsorbents for CO2 capture processes. One important aspect to the design and optimization of these materials is a fundamental understanding of how the properties of the oxide support such as pore structure, particle morphology, and surface properties affect the efficiency of the guest polymer in its interactions with CO2. Previously, the efficiency of impregnated PEI to adsorb CO2 was shown to increase upon the addition of Zr as a surface modifier in SBA-15. But, the efficacy of this method to tune the adsorption performance has not been explored in materials of differing textural and morphological nature. These issues are directly addressed via the preparation of an array of SBA-15 support materials with varying textural and morphological properties, as well as varying content of zirconium doped into the material. Zirconium is incorporated into the SBA-15 either during the synthesis of the SBA-15, or postsynthetically via deposition of Zr species onto pure-silica SBA-15. The method of Zr incorporation alters the textural and morphological properties of the parent SBA-15 in different ways. Importantly, the CO2 capacity of SBA-15 impregnated with PEI increases by a maximum of ~60% with the quantity of doped Zr for a “standard” SBA-15 containing significant microporosity, while no increase in the CO2 capacity is observed upon Zr incorporation for an SBA-15 with reduced microporosity and a larger pore size, pore volume, and particle size. Finally, adsorbents supported on SBA-15 with controlled particle morphology show only modest increases in CO2 capacity upon inclusion of Zr to the silica framework. The data demonstrate that the textural and morphological properties of the support have a more significant impact on the ability of PEI to capture CO2 than the support surface composition.},
doi = {10.1021/acs.langmuir.5b02114},
journal = {Langmuir},
issn = {0743-7463},
number = 34,
volume = 31,
place = {United States},
year = {2015},
month = {8}
}

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Works referencing / citing this record:

Aminosilane-Grafted Zirconia-Titiania-Silica Nanoparticles/Torlon Hollow Fiber Composites for CO 2 Capture
journal, April 2016


Polyethylenimine Applications in Carbon Dioxide Capture and Separation: From Theoretical Study to Experimental Work
journal, March 2017