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808 results on '"Dlugogorski, Bogdan"'

4. Structural properties of alumina surfaces and their roles in the synthesis of environmentally persistent free radicals (EPFRs)

Author

Altarawneh Mohammednoor, Assaf Niveen W., Hussain Hamed M., and Dlugogorski Bogdan Z.

Subjects
alumina, phenoxy radical, surfaces, free radicals, mechanisms, Technology, Chemical technology, TP1-1185, Physical and theoretical chemistry, QD450-801
Abstract

Alumina oxides have been widely utilised as independent catalysts or as support materials for other catalysts. From an environmental perspective, alumina nanoclusters dispersed on surfaces of particulate matter PM12, generated from various combustion processes, play a critical role in the synthesis of environmentally persistent free radicals (EPFRs). Of particular importance are phenoxy-type EPFRs that often act as building blocks for the formation of notorious pollutants. Herein, we present a systematic review of the literature pertinent to structural features of alumina surfaces at the nano-scale and their well-established role in the synthesis of EPFRs. Central to the capacity of alumina surfaces in mediating the formation of EPFRs are their active Lewis acid–base sites. The nature of these sites is very sensitive to hydration scenarios. As evident in electroparamagnetic resonance measurements, more than one category of EPFR forms on alumina surfaces. This generally entails the co-existence of various surface terminations, varying degrees of hydrations, and distinct underlying reaction pathways. The mechanisms for the formation of EPFRs over alumina surfaces involve interactions with terminal OH groups followed by creating genuine chemical bonds with Al3+ sites. Higher concentrations of EPFRs were often detected on alumina surfaces, in reference to other transition metal oxides. We envisage that future studies may focus on the generation of EPFRs from potential precursors other than phenols and catechol, such as brominated species and substituted thiophenols.

Published
2023
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8. IAFSS agenda 2030 for a fire safe world

Author

McNamee, Margaret, Meacham, Brian, van Hees, Patrick, Bisby, Luke, Chow, WK, Coppalle, Alexis, Dobashi, Ritsu, Dlugogorski, Bogdan, Fahy, Rita, Fleischmann, Charles, Floyd, Jason, Galea, Edwin R, Gollner, Michael, Hakkarainen, Tuula, Hamins, Anthony, Hu, Longhua, Johnson, Peter, Karlsson, Björn, Merci, Bart, Ohmiya, Yoshifuni, Rein, Guillermo, Trouvé, Arnaud, Wang, Yi, and Weckman, Beth

Subjects
Patient Safety, Chemical Engineering, Maritime Engineering, Civil Engineering
Abstract

The International Association of Fire Safety Science (IAFSS) is comprised of members from some 40 countries. This paper presents the Association's thinking, developed by the Management Committee, concerning pressing research needs for the coming 10 years presented as the IAFSS Agenda 2030 for a Fire Safe World. The research needs are couched in terms of two broad Societal Grand Challenges: (1) climate change, resiliency and sustainability and (2) population growth, urbanization and globalization. The two Societal Grand Challenges include significant fire safety components, that lead both individually and collectively to the need for a number of fire safety and engineering research activities and actions. The IAFSS has identified a list of areas of research and actions in response to these challenges. The list is not exhaustive, and actions within actions could be defined, but this paper does not attempt to cover all future needs.

Published
2019

25. Introducing Quantum Chemistry in Chemical Engineering Curriculum

Author

Altarawneh, Mohammednoor and Dlugogorski, Bogdan

Abstract

Due to the wide and the ever-increasing strategic applications of quantum chemistry in chemical industries, it is important to introduce chemical engineering students to illustrative case studies that deploy molecular modeling in the design of reactors and derivation of thermochemical functions. Herein, we demonstrate how quantum chemical calculations can be implemented within a unit on the chemical reaction engineering to obtain properties that are typically measured in the laboratory classes, namely, reaction rate constants, fractional conversion of reactants, and residence time. A rigorous coupling between quantum chemistry and chemical reaction engineering is expected to encourage students to appreciate the accuracy and the practicality of molecular calculations in process modeling and design of novel materials.

Published
2018
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33. Memories of Professor Toshisuke Hirano

Author

Dobashi, Ritsu, Suzuki, Takeshi, Suzuki, Masataro, Gao, Lijing, Kuwana, Kazunori, Chow, Wan-Ki, Dlugogorski, Bogdan, van Hees, Patrick, Sun, Jinhua, Harada, Kazunori, editor, Matsuyama, Ken, editor, Himoto, Keisuke, editor, Nakamura, Yuji, editor, and Wakatsuki, Kaoru, editor

Published
2017
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