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In Situ Determination of Hydrogen Inside a Catalytic Reactor Using Prompt γ [Gamma] Activation Analysis

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Teschner,  Detre
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Swoboda,  Manfred
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Borsodi,  Janos
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Revay, Z., Belgya, T., Szentmiklosi, L., Kis, Z., Wootsch, A., Teschner, D., et al. (2008). In Situ Determination of Hydrogen Inside a Catalytic Reactor Using Prompt γ [Gamma] Activation Analysis. Analytical Chemistry, 80(15), 6066-6071. Retrieved from http://dx.doi.org/10.1021/ac800882k.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0010-FC32-5
Abstract
Prompt γ activation analysis (PGAA) has been further developed to analyze reacting components inside a chemical reactor. The new method, in situ PGAA, was used to determine the hydrogen-to-palladium molar ratio under various conditions of palladium-catalyzed alkyne hydrogenation. The H/Pd molar ratio was successfully measured in the range of 0.1−1.0 in an ~2g catalytic reactor containing a few milligrams of palladium catalyst. The amount of hydrogen was only a few tens of micrograms, and the detection limit was ~5 μg, i.e., at ppm level compared to the whole reactor. The description of the device, methodological developments, a feasibility study, and results of a series of catalytic measurements are presented.