Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2015-03-01

Journal: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY

Included Journals: EI、SCIE

Volume: 119

Issue: 3

Page Number: 2205-2219

ISSN: 1388-6150

Key Words: Wastewater; Combustion; Thermogravimetric analysis; Oxygen concentration; O-2/N-2 atmosphere

Abstract: The oxygen-enriched air combustion behaviors and kinetics of refining and chemicals wastewater (RCW) solid were investigated using thermogravimetric analysis. The results showed that the combustion process of RCW solid was a four-stage reaction. The increase in O-2 concentration had negligible effects on the overall first two stages and the vast majority of the third stage, while made the fourth stage shift to a lower temperature region. The kinetic triplets of each stage were determined by Kissinger-Akahira-Sunose, Flynn-Wall-Ozawa, and the master-plots method. For the first three stages, the average E of each stage varied slightly with of O-2 concentration increasing; while the fourth stage showed a rising trend. The most probable reaction models for the first and second stage were the simple order reaction model (F-n), while the random nucleation and nuclei growth model (A(n)) for the third and fourth stage.