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SUBSTRATE DESIGN AND MEMBRANE STABILITY OF MULTILAYER COMPOSITE MEMBRANE FOR CO2 SEPARATION

Wu, Dongzhu
http://rave.ohiolink.edu/etdc/view?acc_num=osu1510429230811329

Abstract Details

2017, Doctor of Philosophy, Ohio State University, Chemical Engineering.
Membrane process for CO2 separation has gained interest due to its system compactness, high energy efficiency, operational and maintenance simplicity, and ability to overcome thermodynamic limitations. Flue gas decarbonization is an important approach to control the increasing atmospheric CO2 level. Membranes with exceptional separation performance are required to perform such capture. In this research, a multilayer composite membrane, consisting of a polyethersulfone (PES) substrate, a Zeolite-Y (ZY) nanoparticle gutter layer (optional), and an amine-containing polymer selective layer, was synthesized for CO2 separation from power plant flue gas and other sources with even lower CO2 concentrations. The PES substrate was fabricated in lab and pilot scales. The membrane morphology was optimized by adjusting the preparation parameters. 14-inch wide PES substrate with reproducible morphology was fabricated successfully by using a continuous casting machine. Moreover, a continuous pilot-scale vacuum-assisted nanoparticle deposition process was developed to deposit an inorganic ZY gutter layer to minimize the selective layer penetration. Additionally, hydrophilic moieties were incorporated in the PES substrate to modify the hydrophilicity of the substrate and reduce the substrate permeation resistance. Both ZY deposition and PES modification improved the separation performance of the composite membrane. There was a concern that the minor contaminant components in flue gas, e.g., SO2, may react with amines in the selective layer, which would affect the long-term membrane stability. The membrane stability in the presence of 1 – 3 ppm SO2 at 57°C was investigated. Upon exposure to ppm levels of SO2, stable separation performances with minor permeance reduction were obtained for the synthesized facilitated transport membranes. The composite membrane synthesized in this research was also employed for CO2 separation from the residual flue gas containing a CO2 concentration of ~ 1%. Capturing the CO2 from residual flue gas after a primary capture system can further reduce the CO2 emission to the atmosphere. The synthesized membrane showed promising separation performance and membrane stability for such separation.
W.S. Winston Ho (Advisor)
Stuart Cooper (Committee Member)
Andre Palmer (Committee Member)
257 p.
Chemical Engineering
Composite membrane; Nanoporous PES substrate; Substrate modification; Facilitated transport membrane; CO2 separation; Membrane stability;

Recommended Citations

Citations

  • Wu, D. (2017). SUBSTRATE DESIGN AND MEMBRANE STABILITY OF MULTILAYER COMPOSITE MEMBRANE FOR CO2 SEPARATION [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1510429230811329

    APA Style (7th edition)

  • Wu, Dongzhu . SUBSTRATE DESIGN AND MEMBRANE STABILITY OF MULTILAYER COMPOSITE MEMBRANE FOR CO2 SEPARATION . 2017. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1510429230811329.

    MLA Style (8th edition)

  • Wu, Dongzhu . "SUBSTRATE DESIGN AND MEMBRANE STABILITY OF MULTILAYER COMPOSITE MEMBRANE FOR CO2 SEPARATION ." Doctoral dissertation, Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1510429230811329

    Chicago Manual of Style (17th edition)

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This open access ETD is published by The Ohio State University and OhioLINK.