The development of structure and microporosity in cellulose carbon

✍ Scribed by K.J. Masters; B. McEnaney

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 739 KB
• Volume: 22
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(84)90095-2

✦ Synopsis

changes in structure and microporosity of a non-graphitizing cellulose carbon upon heattreatment to 1870 K were followed by electron microscopy, X-Ray measu~ents, evolved hydrogen analysis and adsorption of carbon dioxide. The I170 K carbon has a disordered structure containing distorted, defective layer planes which occur singly or in small stacks. Rapid lateral growth of layer planes and improvement in planarity occur on heat treatment to 1670 K and are associated with expulsion of hydrogen. Microporosity is an interconnected network of slit-like pores between layer planes. Layer plane growth above 1670 K causes a collapse of some ultra-micropores to turbostratic spacings resulting in growth of layer stacks and conversion of open micropores to closed micropores. The loss of some ultra-mi~ro~res by conversion to turbostratic spacings causes a progressive increase in mean micropore sizes with heat treatment.