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首页> 美国政府科技报告 >Tube effects and the kinetics of desorption of H2O/H2 from LiAlO2 by temperature programmed desorption measurements.
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Tube effects and the kinetics of desorption of H2O/H2 from LiAlO2 by temperature programmed desorption measurements.

机译：通过程序升温脱附测量管效应和从LialO2中解吸H2O / H2的动力学。

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摘要

Temperature programmed desorption (TPD) measurements are in progress to provide data describing the kinetics of desorption of H(sub 2)O(g) and H(sub 2)(g) from ceramic tritium breeders. Preliminary blank experiments indicated that the steel can be a reactive participant with H(sub 2)O being consumed and H(sub 2) being evolved. There is also evidence of some dissolution of H(sub 2) in the steel. However, it is possible to stabilize the tube in the absence of added H(sub 2) so that useful measurements with H(sub 2)O(g) can be made. Initial work is on the LiAlO(sub 2)-H(sub 2)O(g) system. Fresh samples of LiAlO(sub 2) bear large amounts of adsorbed H(sub 2)O. TPD spectra were measured for LiAlO(sub 2) that had been equilibrated with 200 ppM H(sub 2)O(g) at temperatures from 473 to 773 K. Several techniques of data analysis were applied. There still remain questions of possible peak overlap to resolve for all cases. An activation energy of desorption of H(sub 2)O(g) of approximately 120 kJ/mol appears to be associated with the sample equilibrated at 673 K. When compared with the same value reported in the literature for decomposition of LiOH, this result suggests that some sites on LiAlO(sub 2) might resemble sites on Li(sub 2)O in their adsorptive properties. For the 773 K equilibration, the activation energy of desorption appears considerably higher. 6 refs., 4 figs.

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