Carbon molecular sieve supports for metal catalysts – I. Preparation of the system — platinum supported on polyfurfuryl alcohol carbon

✍ Scribed by J.L. Schmitt Jr.; P.L. Walker Jr.

• Publisher: Elsevier Science
• Year: 1971
• Tongue: English
• Weight: 496 KB
• Volume: 9
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(71)90012-1

✦ Synopsis

A shape-selective carbon molecular sieve support-platinum catalyst system has been prepared by carbonizing polyfurfuryl alcohol (PFA) containing small amounts of chloroplatinic acid. Although the resulting coke behaves as a 4A molecular sieve, grinding to a particle size of about 50~ allows appreciable adsorption of n-butane, due to the shortened diffusion distance for gaseous adsorbate molecules. The same effect, that is conversion to a 5A sieve, can be produced by addition of an activated carbon filler to the partially-polymerized PFA, thereby causing the formation of macrocracks during carbonization which serve as diffusion pathways. The most important variable in the preparation is the PFA to filler ratio. Varying this ratio allows materials of different surface area and molecular sieve properties to be prepared.