Hydrogasification kinetics

In contrast to hydrogenation and oxidation reactions, much less is known about the ability of materials to effect the catalysis of hydrogasification reactions. Alkali carbonates, 1-10 wt % catalyze the hydrogasification of coals and cokes at 800°-900°C (6). The suggested mechanism is that adsorption of the alkalies by carbon prevents graphitization of the surface. Zinc and tin halides are effective hydrogasification catalysts. There is, however, little kinetic information on any of the catalyzed hydrogasification reactions. 

This kinetic study of catalyzed hydrogasification reactions utilizes a high temperature, high pressure recording balance. A thermobalance is particularly useful in gas-solid reactions because the weight of small solid samples can be measured continuously. Direct kinetic analysis of the weight loss curves are straightforward. 

Figure 5. Kinetic test for non-catalyzed hydrogasification of Char A at 500 and 1000 psia, 950°C...

Sheth, A. C., Sastry, C., Yeboah, Y. D., Xu, Y., AgarwaL P. (2004). Catalytic gasification of coal using eutectic salts reaction kinetics for hydrogasification using binary and ternary eutectic catalysts. Fuel, 83, 557—572. 

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