Experimental options for determining the temperature for the onset of sintering of coal ash

Citation
Ay. Al-otoom et al., Experimental options for determining the temperature for the onset of sintering of coal ash, ENERG FUEL, 14(1), 2000, pp. 227-233
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environmental Engineering & Energy
Journal title
ENERGY & FUELS
ISSN journal
0887-0624 → ACNP
Volume
14
Issue
1
Year of publication
2000
Pages
227 - 233
Database
ISI
SICI code
0887-0624(200001/02)14:1<227:EOFDTT>2.0.ZU;2-1
Abstract
This paper presents a comparison of techniques that can be used to obtain t he sintering temperature of coal ash. These techniques are thermal conducti vity analysis (TCA), thermome-chanical analysis (TMA), the compressive stre ngth test (CS), and a proposed new technique called the pressure-drop techn ique. Generally, the results from these four techniques compare well and sh owed sintering temperatures in the range of 600-1000 degrees C. These tempe ratures reflect the onset of strength development in coal ash deposits. An analysis of the results indicates the compressive strength and thermal cond uctivity techniques are believed to overestimate the sintering temperature of coal ash as measurements were conducted at temperature intervals and the se measurements depend on treatment time. Thermomechanical analysis and pre ssure-drop techniques are believed to provide a more accurate indication of the sintering temperature due to the constant monitoring of ash structural changes and the inherent sensitivity of the methods to structural changes.