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Measurement of Aromatic Air Pollutants by In Situ IR Spectroscopy of Activated Carbon

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Activated carbon is a microporous solid that can be made with an extremely high internal surface area. Because it retains a wide variety of organic substances, the thermochemistry of activated carbon has been extensively characterized, especially as it relates to the adsorption of air and water contaminants. Activated carbon is generally amorphous, without regular carbon structure or pore shape, and the micro-carbon structures and surfaces which are responsible for the adsorption characteristics of these carbons are not well understood because, in part, there is a lack of spectroscopic methods that are sensitive to the microscopic morphology of amorphous carbons. [Spectroscopic methods such as IR, Raman, x-ray diffraction, and EXAFS provide little information about the molecular structure of the carbon unless it has a graphitic or diamond component which is large in extent. At best, micrographitic domains of approximately 10-20 Å (diameter) are inferred from the Raman spectrum of some activated carbons.]

Keywords: Infrared; Spectroscopic techniques

Document Type: Research Article


Affiliations: IBM Research Division, Almaden Research Center, K63/803,650 Harry Road, San Jose, California 95120-6099; present address: E35/013 IBM, San Jose, CA 95193

Publication date: January 1, 1989

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