In situ determination of hydrogen inside a catalytic reactor using prompt gamma activation analysis.
Prompt gamma 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 approximately 2-g 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 approximately 5 microg, 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.
Révay
Zsolt
Z
Institute of Isotopes, H-1525 Budapest, Hungary. revay@iki.kfki.hu
Belgya
Tamás
T
Szentmiklósi
László
L
Kis
Zoltán
Z
Wootsch
Attila
A
Teschner
Detre
D
Swoboda
Manfred
M
Schlögl
Robert
R
Borsodi
János
J
Zepernick
Roger
R