Comparison of surface properties of carbons gasified in nitrous oxide and in oxygen

✍ Scribed by H. Teng; H.-C. Lin

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 719 KB
• Volume: 35
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/s0008-6223(97)00107-3

✦ Synopsis

Surface structures and reactivities of carbons gasified in NZO and in O2 are compared in this study. The carbon employed was derived from pyrolysis of phenol-formaldehyde resins. It was found that greater surface area and pore volume are created for the carbon gasified in 0, than that in N,O. At high extents of burn-off the carbon gasified in N,O shows a larger mesopore volume than that in 02. The reactivity per unit surface area of the carbon in N,O decreases with the extent of burn-off, while that in 0, remains relatively constant at various extents of burn-off. Surfaces in carbon micropores do not appear to be fully utilized in the N,O-carbon reaction. It is confirmed that standard NZ or CO, surface area is not a proper characterization of the reactive surface area of carbon gasified in N,O.