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Development of microporosity in carbons for carbon dioxide adsorption

Marszewska, Jowita E

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2017, PHD, Kent State University, College of Arts and Sciences / Department of Chemistry.
Generation of microporosity with desired pore sizes in carbon materials is still a challenge, therefore the goal of this dissertation research is to design, synthesize, and characterize new highly microporous carbon sorbents for CO2 adsorption by improving activation processes to generate and control micropores of desired sizes. In this research, it is postulated that the materials with features required for highly efficient CO2 uptake: large volume of small micropores and high specific surface area can be generated by combination of right synthetic and post-synthetic strategies. The strategies discussed in this dissertation will include: studies of the effect of different activating agents on the development of microporosity in polymeric-based carbons, development of carbon sorbents with high porosity through potassium organic salt addition, synthesis of micro- and micro-mesoporous carbon spheres in combination with silica templating and controlled post-synthesis activation with CO2. The first project discusses the effect of different activating agents on the development of microporosity in relation to CO2 adsorption on polymeric-based carbons. In this study, a commercial carbon was subjected to activation with five different agents to enhance microporosity and maximize CO2 capture. This study establishes the suitability of different activation methods toward creation of micropores and identifies the most effective activator and activation conditions to maximize the amount of pores with sizes < 1 nm. The second project shows a novel route for activation and pore tuning in carbon materials. The activation method developed in this research is an in-situ activation achieved via direct addition of potassium organic salts to the synthesis of polymeric spheres. This study shows the effect of the amount of salt on 1) the porosity development, both in the range of micropores and small mesopores, and 2) morphology control of the resulting carbon spheres. The third project discusses the synthesis of micro- and micro-mesoporous carbon spheres using the extended Stöber method in combination with silica templating and the controlled post-synthesis activation with CO2. The proposed strategy shows the possibility of improving 1) pore volume by increasing the amount of silica, 2) surface area by activation of carbon with CO2, and 3) mass transfer by introduction of mesopores in microporous carbon spheres.
Mietek Jaroniec (Committee Chair)
Anatoly Khitrin (Committee Member)
Songping Huang (Committee Member)
Brett Ellman (Committee Member)
John Portman (Committee Member)
133 p.

Recommended Citations

Citations

  • Marszewska, J. E. (2017). Development of microporosity in carbons for carbon dioxide adsorption [Doctoral dissertation, Kent State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=kent1492043634249216

    APA Style (7th edition)

  • Marszewska, Jowita. Development of microporosity in carbons for carbon dioxide adsorption. 2017. Kent State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=kent1492043634249216.

    MLA Style (8th edition)

  • Marszewska, Jowita. "Development of microporosity in carbons for carbon dioxide adsorption." Doctoral dissertation, Kent State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=kent1492043634249216

    Chicago Manual of Style (17th edition)