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1 article(s) from Elnagar, Mohamed M

Optimizing reaction conditions for the light-driven hydrogen evolution in a loop photoreactor

Pengcheng Li,
Daniel Kowalczyk,
Johannes Liessem,
Mohamed M. Elnagar,
Dariusz Mitoraj,
Radim Beranek and
Dirk Ziegenbalg

Beilstein J. Org. Chem. 2024, 20, 74–91, doi:10.3762/bjoc.20.9

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Graphical Abstract

Scheme 1: Photocatalytic hydrogen evolution with Pt-loaded polymeric carbon nitride.

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Figure 1: SEM images of the Pt-PCN photocatalyst at different magnifications.

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Figure 2: SEM-EDX elemental mapping images of C, N, and Pt on a particle.

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Figure 3: Exemplary results of the mixing experiments using methylene blue to visualize and quantify fluid fl...

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Figure 4: Red channel values of ROIs with different stirring speeds: (a) left space between reactor and draft...

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Figure 5: Quantified mixing time using different stirring speeds.

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Figure 6: Chemical actinometry results: (a) actinometer conversion at different irradiation time, (b) photon ...

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Figure 7: Photon flux in the loop reactor with respect to the LED electrical current.

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Figure 8: Absorbance as function of photocatalyst loading for different optical path lengths.

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Figure 9: Long-term operation of the loop photoreactor.

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Figure 10: Visualization of the response surfaces of the modified DOE model for the four parameters: (a) photo...

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Figure 11: Parity plot of the measured photocatalytic hydrogen generation rate versus the values predicted by ...

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Figure 12: Effect of photon flux on hydrogen generation rate: (a) hydrogen generation rate as function of the ...

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Figure 13: Effect of inert gas flow rate on hydrogen generation rate: (a) hydrogen generation rate as a functi...

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Figure 14: Effect of photocatalyst loading on the hydrogen generation rate: (a) hydrogen generation rate as fu...

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Figure 15: Effect of stirring speed on hydrogen generation rate: (a) hydrogen generation rate as function of i...

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Figure 16: 3D plot of AQE for different studied parameters: (a) AQE for different photon fluxes and inert gas ...

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Figure 17: Reactor design: (a) CAD drawing of the loop reactor, (b) picture of the manufactured loop reactor.

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Figure 18: Assembled reactor and 3D printed parts: (a) the whole reactor setup, (b) 3D printed propellers.

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Figure 19: Photocatalytic reaction setup: (a) reaction setup flow diagram, (b) reaction setup in lab. 1 argon ...

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Full Research Paper

Published 16 Jan 2024

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