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URN etd-0111106-152441 Statistics This thesis had been viewed 2879 times. Download 1471 times. Author Shih-Rong Jiao Author's Email Address No Public. Department Chemical Engineering Year 2005 Semester 1 Degree Master Type of Document Master's Thesis Language English Page Count 77 Title A SEMI-BATCH DEVICE FOR MEASUREMENT OF
HYDROGEN PERMEATION IN PALLADIUM MEMBRANE
Keyword sneak-through semi-batch device permeation palladium membrane tube gas mixture carbon monoxide carbon dioxide carbon dioxide carbon monoxide gas mixture palladium membrane tube permeation semi-batch device sneak-through Abstract ABSTRACT
The objective of this research is to set up a semi-batch device, a cylinder inserted with a hydrogen-permeable palladium membrane tube, in order to study the permeation of hydrogen through the palladium membrane. The device can be used to test the hydrogen permeation from 11 bar to atmospheric pressure at a constant temperature in an experimental run.
Pure hydrogen gas and a gas mixture of hydrogen and carbon monoxide or carbon dioxide were used in the experiment to study the hydrogen permeation through the palladium membrane. Up to 160 ppm of carbon dioxide and 100 ppm of carbon monoxide were found in the permeated hydrogen stream when a gas mixture of 50% H2 and 50% CO2 was tested. However, neither CO2 nor CO was found for a gas mixture of 50% H2 and 50% CO. It is suspected that trace of CO2 sneaks through the Pd membrane due to Pd lattice expansion, and part of the sneak-through CO2 reacts with H2 to form CO in the low pressure side.
The experimental data obtained for hydrogen permeation through the palladium membrane have been fitted to the mathematical model developed by Hong and Lin (2005). The experimental data agree well with the model calculations, indicating the feasibility of the model in a wide range of pressure.
Advisor Committee Jan-Chen Hong - advisor
M. H. Rei - co-chair
R. C. Wang - co-chair
Files Date of Defense 2005-11-15 Date of Submission 2006-01-11