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Final thesis report.pdf (2.13 MB)

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Surface area determination of porous materials using the Brunauer-Emmett-Teller (BET) method: limitations and improvement

Sinha, Priya
http://rave.ohiolink.edu/etdc/view?acc_num=osu1524058483445217

Abstract Details

2018, Master of Science, Ohio State University, Chemical Engineering.
Metal-organic frameworks (MOFs) are a new class of crystalline porous materials formed by connecting metal clusters with organic linkers. In recent years, there has been an increasing demand of ultra-high surface area MOFs as these materials can be potentially used in applications such as gas storage, catalysis, and drug delivery. Therefore, accurate determination of surface area is important toward the development of promising MOFs for these applications. Surface areas of MOFs are commonly characterized using the Brunauer-Emmett-Teller (BET) method, a widely used experimental technique. The BET method has been found to provide decent results but in recent years, some discrepancy has been reported. In this study, we carried out a comprehensive evaluation of the BET method for a large collection of MOFs. We used grand canonical Monte Carlo (GCMC) simulations to obtain isotherms in nanoporous materials. We also used cylindrical carbon nanotubes as model systems for capturing the behavior of the BET method. We compared, evaluated, analyzed our results and summarized several possible scenarios that could happen. The excess sorption work (ESW) method has been also utilized and demonstrated as an addition to provide better estimation of surface area, in particular for cases when the BET method overestimates the surface area significantly.
Li-Chiang Lin (Advisor)
78 p.
Chemical Engineering
BET method; Brunauer-Emmett-Teller method; MOFs; ESW method; Excess Sorption Work method; surface area characterization

Recommended Citations

Citations

  • Sinha, P. (2018). Surface area determination of porous materials using the Brunauer-Emmett-Teller (BET) method: limitations and improvement [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1524058483445217

    APA Style (7th edition)

  • Sinha, Priya. Surface area determination of porous materials using the Brunauer-Emmett-Teller (BET) method: limitations and improvement. 2018. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1524058483445217.

    MLA Style (8th edition)

  • Sinha, Priya. "Surface area determination of porous materials using the Brunauer-Emmett-Teller (BET) method: limitations and improvement." Master's thesis, Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1524058483445217

    Chicago Manual of Style (17th edition)

osu1524058483445217
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This open access ETD is published by The Ohio State University and OhioLINK.