Diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy has been utilized to monitor the <i>in situ</i> acetylation of a powdered sub-bituminous coal at the Oak Ridge Y-12 Plant. The acetylation reaction was carried out by the adsorption of acetic anhydride onto the powdered coal from the gas phase with subsequent heating above 100°C required to initiate the reaction. This technique can be used to gain insight into the hydroxyl (O-H) content of the specific coal sample under study by simultaneous observation of the disappearance of infrared absorptions due to various types of O-H functional groups and of the appearance of absorptions due to carbonyl functional groups resulting from reaction with the anhydride. This entire study can be carried out on a single sample without any intervening sample handling or the introduction of extraneous parameters that could alter the results.

PDF Article

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription