Open AccessSTRATEGIES AND TECHNOLOGY FOR MANAGING HIGH-CARBON ASH
Author(s) -
Robert H. Hurt,
Eric M. Suuberg,
John M. Veranth
Publication year - 2001
Language(s) - English
Resource type - Reports
DOI - 10.2172/833643
Subject(s) - fly ash , carbon fibers , adsorption , nox , ozone , coal , environmental science , chemical engineering , environmental chemistry , chemistry , waste management , materials science , combustion , engineering , organic chemistry , composite number , composite material
The overall objective of the present project is to identify and assess strategies and solutions for the management of industry problems related to carbon in ash. Specific research issues to be addressed include: (1) the effect of parent fuel selection on ash properties and adsorptivity, including a first ever examination of the air entrainment behavior of ashes from alternative (non-coal) fuels; (2) the effect of various low-NOx firing modes on ash properties and adsorptivity; and (3) the kinetics and mechanism of ash ozonation. This data will provide scientific and engineering support of the ongoing process development activities. This first project period, experiments were carried out to better understand the fundamental nature of the ozonation effect on ash. Carbon surfaces were characterized by surfactant adsorption, and by X-ray Photoelectron Spectroscopy before and after oxidation, both by air at 440 C and by ozone at room temperature. The results strongly suggest that the beneficial effect of ozonation is in large part due to chemical modification of the carbon surfaces