Influence of K2CO3 catalyst on rate of hydrogen gasification of carbon black

✍ Scribed by Hossein Zoheidi; Dennis J. Miller

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 854 KB
• Volume: 25
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(87)90125-4

✦ Synopsis

Kinetic rate measurements of the hydrogen gasification of a graphiticed carbon black at 865°C and 500 psig hydrogen are reported for K,CO, loadings of 0, 1, 5 and 10 wt. %. Potassium loss was measured during reaction; surface area and catalyst loading of residual samples were measured after experiment. A twentyfold increase in gasification rate at 50%-70% conversion is observed upon addition of 10 wt. % K,CO,. Specific reaction rate is approximately constant in the presence of 5% and 10% catalyst but decreases for the uncatalyzed sample. These results, as well as the results of experiments in which the carbon is first degassed, support the postulate that surface oxygen is the primary catalytic entity in the hydrogen gasification and that K&O, merely stabilizes and provides additional oxygen on the surface.