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    Aminosilane-Functionalized Cellulosic Polymer for Increased Carbon Dioxide Sorption

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    Type
    Article
    Authors
    Pacheco, Diana M.
    Johnson, J.R.
    Koros, William J.
    KAUST Grant Number
    KUS-I1-011-21
    Date
    2011-12-09
    Online Publication Date
    2011-12-09
    Print Publication Date
    2012-01-11
    Permanent link to this record
    http://hdl.handle.net/10754/597499
    
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    Abstract
    Improvement in the efficiency of CO 2 separation from flue gases is a high-priority research area to reduce the total energy cost of carbon capture and sequestration technologies in coal-fired power plants. Efficient CO 2 removal from flue gases by adsorption systems requires the design of novel sorbents capable of capturing, concentrating, and recovering CO 2 on a cost-effective basis. This paper describes the preparation of an aminosilane-functionalized cellulosic polymer sorbent with enhanced CO 2 sorption capacity and promising performance for use in postcombustion carbon capture via rapid temperature-swing adsorption systems. The introduction of aminosilane functionalities onto the backbone of cellulose acetate was achieved by the anhydrous grafting of N-(2-aminoethyl)-3- aminoisobutyldimethylmethoxysilane. The dry sorption capacity of the modified cellulosic polymer reached 27 cc (STP) CO 2/cc sorbent (1.01 mmol/g sorbent) at 1 atm and 39 cc (STP) CO 2/cc sorbent (1.46 mmol/g sorbent) at 5 atm and 308 K. The amine loading achieved was 5.18 mmol amine(nitrogen)/g sorbent. Exposure to water vapor after the first dry sorption cycle increased the dry sorption capacity of the sorbent by 12% at 1 atm, suggesting its potential for rapid cyclic adsorption processes under humid feed conditions. The CO 2 sorbent was characterized in terms of chemical composition, density changes, molecular structure, thermal stability, and surface morphology. © 2011 American Chemical Society.
    Citation
    Pacheco DM, Johnson JR, Koros WJ (2012) Aminosilane-Functionalized Cellulosic Polymer for Increased Carbon Dioxide Sorption. Ind Eng Chem Res 51: 503–514. Available: http://dx.doi.org/10.1021/ie2020685.
    Sponsors
    This publication is based in part on work supported by Award No. KUS-I1-011-21, made by King Abdullah University of Science and Technology (KAUST). The authors would also like to thank the Mexico's National Council on Science and Technology (CONACYT) for their financial support in this research.
    Publisher
    American Chemical Society (ACS)
    Journal
    Industrial & Engineering Chemistry Research
    DOI
    10.1021/ie2020685
    ae974a485f413a2113503eed53cd6c53
    10.1021/ie2020685
    Scopus Count
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    Publications Acknowledging KAUST Support

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