Adsorption of hydrogen sulfide on microporous carbon

✍ Scribed by O.C. Cariaso; P.L. Walker Jr.

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 104 KB
• Volume: 13
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(75)90238-9

✦ Synopsis

Information on the interaction of H,S with surfaces, including carbon, is of increasing importance as interest grows on its removal from gaseous streams. For example, a carbon surface is an active catalyst for the oxidation of H,S to elemental sulfur [l].

In this study, the uptake of H,S on Saran carbon was measured between 60-175". The microporous carbon was produced by the carbonization at 900" of Saran 489, supplied by the Dow Chemical Company. From adsorption of CO, at 25" and using a Dubinin plot [2], a micropore surface area of 932 m'/g is calculated for a 65 x 150 mesh particle size fraction of this carbon [3]. For this calculation, a molecular area for CO, at 25" of 25.3AZ was taken(41.

Adsorption of H,S was measured gravimetrically using a Cahn R. G. electrobalance, having a total capacity of 2.5g and a sensitivity of 0.1 pg. The microbalance, housed in a glass vacuum bottle, was connected to a mercury diffusion-mechanical pump combination in order to attain a running vacuum of lo-'Torr.

Prior to an adsorption run, the carbon was outgassed at 900" for