Unsteady state absorption of carbon dioxide by dilute sodium hydroxide solutions

✍ Scribed by T. R. Rehm; A. J. Moll; A. L. Babb

• Publisher: American Institute of Chemical Engineers
• Year: 1963
• Tongue: English
• Weight: 656 KB
• Volume: 9
• Category: Article
• ISSN: 0001-1541
• DOI: 10.1002/aic.690090611

✦ Synopsis

addition (that is regeneration by oxygen) is assured. A very important means for adjusting the metal-oxygen bond energy of an oxide is by reacting it with another material to produce a new structure with modified bond energies and surface geometry (such as a series of vanadate compounds starting with the alkali vanadates and perhaps ending with heteropoly vanadic acids).

The experimental results described here are consistent with the proposed hypothesis, but there are obvious complicating factors. For example oxygen diffusion from bulk to surface and the reverse process tend to distort somewhat the site distributions of the surfaces from those described in the models. Also phase boundaries, dislocations, and other forms of surface disorder add further complications to the case of real surfaces. However in spite of these complications there is a clearly distinguishable correlation between the approximate surface configuration as described by the model and the selectivity factor in the oxidation of propylene to acrolein.