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Your search keyword '"Schwarzer, Maud"' showing total 16 results
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16 results on '"Schwarzer, Maud"'

1. Continuous Synthesis of Diazo Acetonitrile: From Experiments to Physical and Grey-Box Modeling

Author

Baldan, Marco, Blauth, Sebastian, Bošković, Dušan, Leithäuser, Christian, Mendl, Alexander, Radulescu, Ligia, Schwarzer, Maud, Wegner, Heinrich, and Bortz, Michael

Subjects
Mathematics - Optimization and Control
Abstract

Diazo compounds are gathering interest for their potential in promoting greener synthesis routes. We investigate, at a lab-scale, the continuous synthesis of diazo acetonitrile (DAN) using a micro-structured flow reactor and a flow reaction calorimeter. Data concerning DAN formation in the former, and relative to reaction heat and gas flow rate in the latter, are collected. We present both a physical and a grey-box simulation model, both of which are calibrated to our measurements. Both models provide valuable insights into the DAN synthesis. The grey-box approach is useful to incorporate the complex chemical reaction pathways for DAN synthesis and decomposition that are currently hard to address with the physical model.

Published
2023
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6. Continuous Flow Desulfurization of a Model Fuel Catalysed by Titanium Functionalized UiO‐66

Author

Piscopo, Calogero Giancarlo, Voellinger, L., Schwarzer, Maud, Polyzoidis, Angelos, Boskovic, Dusan, Löbbecke, Stefan, and Publica

Abstract

The porous material UiO‐66 is one of the most stable MOFs, retaining its properties under a relatively wide range of chemical and physical conditions, making it attractive for post‐synthetic modifications and catalytic applications. A Titanium functionalization of UiO‐66 has been carried out and the synthesized material has been efficiently used as catalyst in the continuous oxidative desulfurization of a model fuel with aqueous H2O2. Using dibenzothiophene as sulfur source, only a partial desulfurization has been achieved, nevertheless the functionalized MOF showed better performances compared to the standard UiO‐66. The titanium containing MOF allowed to completely removing thioanisole from the oil phase within only eight minutes. The pore sizes of UiO‐66 are playing an important role in allowing a fast oxidation of the thioanisole compared to dibenzothiophene.

Published
2019

14. Highly chemoselective metal-free oxidation of sulfides with diluted H2O2in a continuous flow reactor.

Author

Maggi, Raimondo, Chitsaz, Soheila, Loebbecke, Stefan, Piscopo, Calogero G., Sartori, Giovanni, and Schwarzer, Maud

Subjects
SULFIDES, OXIDATION, HYDROGEN peroxide, CHEMICAL reactors, AROMATIC compounds, ION exchange resins, METAL catalysts
Abstract

The oxidation of different aromatic sulfides catalyzed by Amberlite IR 120 H was performed with a very high efficiency in a continuous flow reactor. For the first time this reaction takes place under mild conditions using only 3% aqueous hydrogen peroxide and no metal catalyst. [ABSTRACT FROM AUTHOR]

Published
2011
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15. Highly chemoselective metal-free oxidation of sulfides with diluted H2O2 in a continuous flow reactor.

Author

Maggi, Raimondo, Chitsaz, Soheila, Loebbecke, Stefan, Piscopo, Calogero G., Sartori, Giovanni, and Schwarzer, Maud

Subjects
SULFIDE synthesis, CHEMOSELECTIVITY, OXIDATION kinetics, POLYSTYRENE, BENZENESULFONIC acid, CONTINUOUS flow reactors
Abstract

The oxidation of different aromatic sulfides catalyzed by Amberlite IR 120 H was performed with a very high efficiency in a continuous flow reactor. For the first time this reaction takes place under mild conditions using only 3% aqueous hydrogen peroxide and no metal catalyst. [ABSTRACT FROM AUTHOR]

Published
2011
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