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308 results on '"Thommes, M."'

3. A reference high-pressure CH4 adsorption isotherm for zeolite Y: results of an interlaboratory study

Author

Nguyen, H. G. T., Sims, C. M., Toman, B., Horn, J., van Zee, R. D., Thommes, M., Ahmad, R., Denayer, J. F. M., Baron, G. V., Napolitano, E., Bielewski, M., Mangano, E., Brandani, S., Broom, D. P., Benham, M. J., Dailly, A., Dreisbach, F., Edubilli, S., Gumma, S., Möllmer, J., Lange, M., Tian, M., Mays, T. J., Shigeoka, T., Yamakita, S., Hakuman, M., Nakada, Y., Nakai, K., Hwang, J., Pini, R., Jiang, H., Ebner, A. D., Nicholson, M. A., Ritter, J. A., Farrando-Pérez, J., Cuadrado-Collados, C., Silvestre-Albero, J., Tampaxis, C., Steriotis, T., Řimnáčová, D., Švábová, M., Vorokhta, M., Wang, H., Bovens, E., Heymans, N., and De Weireld, G.

Published
2020
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5. A reference high-pressure CO2 adsorption isotherm for ammonium ZSM-5 zeolite: results of an interlaboratory study

Author

Nguyen, H. G. T., Espinal, L., van Zee, R. D., Thommes, M., Toman, B., Hudson, M. S. L., Mangano, E., Brandani, S., Broom, D. P., Benham, M. J., Cychosz, K., Bertier, P., Yang, F., Krooss, B. M., Siegelman, R. L., Hakuman, M., Nakai, K., Ebner, A. D., Erden, L., Ritter, J. A., Moran, A., Talu, O., Huang, Y., Walton, K. S., Billemont, P., and De Weireld, G.

Published
2018
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6. The relaxation behavior of supercooled and glassy imidacloprid.

Author

Mansuri, A., Münzner, P., Feuerbach, T., Vermeer, A. W. P., Hoheisel, W., Böhmer, R., Thommes, M., and Gainaru, C.

Subjects
IMIDACLOPRID, SUPERCOOLED liquids, GLASS transition temperature, MOLECULAR dynamics
Abstract

Employing dielectric spectroscopy, oscillatory shear rheology, and calorimetry, the present work explores the molecular dynamics of the widely used insecticide imidacloprid above and below its glass transition temperature. In its supercooled liquid regime, the applied techniques yield good agreement regarding the characteristic structural (alpha) relaxation times of this material. In addition, the generalized Gemant–DiMarzio–Bishop model provides a good conversion between the frequency-dependent dielectric and shear mechanical responses in its viscous state, allowing for an assessment of imidacloprid's molecular hydrodynamic radius. In order to characterize the molecular dynamics in its glassy regime, we employ several approaches. These include the application of frequency–temperature superposition (FTS) to its isostructural dielectric and rheological responses as well as use of dielectric and calorimetric physical aging and the Adam–Gibbs–Vogel model. While the latter approach and dielectric FTS provide relaxation times that are close to each other, the other methods predict notably longer times that are closer to those reflecting a complete recovery of ergodicity. This seemingly conflicting dissimilarity demonstrates that the molecular dynamics of glassy imidacloprid strongly depends on its thermal history, with high relevance for the use of this insecticide as an active ingredient in technological applications. [ABSTRACT FROM AUTHOR]

Published
2021
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14. Correction to: A reference high-pressure CO2 adsorption isotherm for ammonium ZSM-5 zeolite: results of an interlaboratory study

Author

Nguyen, H. G. T., Espinal, L., van Zee, R. D., Thommes, M., Toman, B., Hudson, M. S. L., Mangano, E., Brandani, S., Broom, D. P., Benham, M. J., Cychosz, K., Bertier, P., Yang, F., Krooss, B. M., Siegelman, R. L., Hakuman, M., Nakai, K., Ebner, A. D., Erden, L., Ritter, J. A., Moran, A., Talu, O., Huang, Y., Walton, K. S., Billemont, P., and De Weireld, G.

Published
2018
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15. Critical depletion of pure fluids in colloidal solids: Results of experiments on EURECA and grand canonical Monte Carlo simulations

Author

Thommes, M., Schoen, M., Findenegg, G. H., Araki, H., editor, Brézin, E., editor, Ehlers, J., editor, Frisch, U., editor, Hepp, K., editor, Jaffe, R. L., editor, Kippenhahn, R., editor, Weidenmüller, H. A., editor, Wess, J., editor, Zittartz, J., editor, Beiglböck, W., editor, Ratke, Lorenz, editor, Walter, Hannes, editor, and Feuerbacher, Berndt, editor

Published
1996
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35. DOE Chair of Excellence in Environmental Disciplines-Final Technical Report

Author

Kurunganty, Sastry, primary, Loran, Roberto, additional, Roque-Malherbe, Rolando, additional, Hijazi, Yazan, additional, Nieto, Santander, additional, Gomez, Will A., additional, Duconge, Jose, additional, Cotto, María del C., additional, Muniz, Carlos, additional, Diaz, Francisco J., additional, Neira, Carlos F., additional, Marquez, Francisco, additional, Del Valle, W., additional, and Thommes, M., additional

Published
2014
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37. A reference high-pressure CH4 adsorption isotherm for zeolite Y: results of an interlaboratory study.

Author

Nguyen, H. G. T., Sims, C. M., Toman, B., Horn, J., van Zee, R. D., Thommes, M., Ahmad, R., Denayer, J. F. M., Baron, G. V., Napolitano, E., Bielewski, M., Mangano, E., Brandani, S., Broom, D. P., Benham, M. J., Dailly, A., Dreisbach, F., Edubilli, S., Gumma, S., and Möllmer, J.

Abstract

This paper reports the results of an international interlaboratory study led by the National Institute of Standards and Technology (NIST) on the measurement of high-pressure surface excess methane adsorption isotherms on NIST Reference Material RM 8850 (Zeolite Y), at 25 °C up to 7.5 MPa. Twenty laboratories participated in the study and contributed over one-hundred adsorption isotherms of methane on Zeolite Y. From these data, an empirical reference equation was determined, along with a 95% uncertainty interval (Uk=2). By requiring participants to replicate a high-pressure reference isotherm for carbon dioxide adsorption on NIST Reference Material RM 8852 (ZSM-5), this interlaboratory study also demonstrated the usefulness of reference isotherms in evaluating the performance of high-pressure adsorption experiments. [ABSTRACT FROM AUTHOR]

Published
2020
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40. A reference high-pressure CO2 adsorption isotherm for ammonium ZSM-5 zeolite: results of an interlaboratory study.

Author

Nguyen, H. G. T., Espinal, L., van Zee, R. D., Thommes, M., Toman, B., Hudson, M. S. L., Mangano, E., Brandani, S., Broom, D. P., Benham, M. J., Cychosz, K., Bertier, P., Yang, F., Krooss, B. M., Siegelman, R. L., Hakuman, M., Nakai, K., Ebner, A. D., Erden, L., and Ritter, J. A.

Abstract

This paper reports the results of an international interlaboratory study led by the National Institute of Standards and Technology (NIST) on the measurement of high-pressure surface excess carbon dioxide adsorption isotherms on NIST Reference Material RM 8852 (ammonium ZSM-5 zeolite), at 293.15 K (20 °C) from 1 kPa up to 4.5 MPa. Eleven laboratories participated in this exercise and, for the first time, high-pressure adsorption reference data are reported using a reference material. An empirical reference equation nex=d(1+exp[-ln(P)+a/b])c, [nex-surface excess uptake (mmol/g), P-equilibrium pressure (MPa), a = −6.22, b = 1.97, c = 4.73, and d = 3.87] along with the 95% uncertainty interval (Uk = 2 = 0.075 mmol/g) were determined for the reference isotherm using a Bayesian, Markov Chain Monte Carlo method. Together, this zeolitic reference material and the associated adsorption data provide a means for laboratories to test and validate high-pressure adsorption equipment and measurements. Recommendations are provided for measuring reliable high-pressure adsorption isotherms using this material, including activation procedures, data processing methods to determine surface excess uptake, and the appropriate equation of state to be used. [ABSTRACT FROM AUTHOR]

Published
2018
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42. Carbide-derived carbon monoliths with hierarchical pore architectures

Author

Oschatz, M., Borchardt, L., Thommes, M., Cychosz, K.A., Senkovska, I., Klein, N., Frind, R., Leistner, M., Presser, V., Gogotsi, Y., Kaskel, S., and Publica

Subjects
polyHIPEs, adsorption, carbon, hierarchical structure, porous material
Abstract

Sierpinski carbon: Macroporous carbide-derived carbon monoliths (DUT-38) were synthesized starting from SiC-PolyHIPEs, resulting in a hierarchical micro-, meso-, and macroporous structure. The high specific surface area and high macropore volume renders PolyHIPE-CDC an excellent adsorbent combining high storage capacity with excellent adsorption rates in gas storage and air filtration.

Published
2012

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