Four different methods (TEOM, TPO-IR, TPD-IR, and TPO-TGA) were used comparatively for more accurate and reliable measurements of carbon formation on used Ni/Al2O3 reforming catalysts with and without Ca-promotion. TPO-TGA could not discriminate carbon burn off and Ni oxidation, especially when only a trace amount of carbon was formed that needs to be detected. TEOM was run on-line during methane reforming, it could avoid any other effects besides the reforming reactions. There was a fairly good correlation between the two techniques. The un-promoted C11-9-09 showed a better consistence between the two methods, noting that the slope of the linear trend line is very close to 1, while G-91 showed larger amount of carbon detected by TEOM than by TPO-IR.
|Original language||English (US)|
|Number of pages||3|
|Journal||ACS Division of Fuel Chemistry, Preprints|
|State||Published - Sep 1 2003|
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