Kinetics of coal oxy-combustion by means of different experimental techniques

► The rate of carbon conversion in is investigated with 1–30% O2 in CO2. ► An innovative aerodynamic levitator particle reactor (ALPR) is presented. ► ALPR is compared with isothermal and non-isothermal thermogravimetric analysis. ► Results have been fitted to simple rate expressions for oxy-fuel co...

Full description

Saved in:
Bibliographic Details
Published in:Fuel (Guildford) 2012-12, Vol.102, p.751-759
Main Authors: Senneca, Osvalda, Cortese, Luciano
Format: Article
Language:English
Subjects:
Aerodynamic levitator particle reactor
Applied sciences
Carbon dioxide
Coal
Coal oxy-combustion
Combustion
Combustion and gasification kinetics
Conversion
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Flues
Fuels
Impact tests
Reactors
Tube furnaces
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:► The rate of carbon conversion in is investigated with 1–30% O2 in CO2. ► An innovative aerodynamic levitator particle reactor (ALPR) is presented. ► ALPR is compared with isothermal and non-isothermal thermogravimetric analysis. ► Results have been fitted to simple rate expressions for oxy-fuel combustion. ► Commonly used kinetic laws proved unsatisfactory at high temperature. A large number of papers reported measures of coal char conversion rate under combustion and gasification conditions. Measures involved a variety of coal and char types, as well as different experimental techniques, ranging from TGA to wire mesh reactors and drop tube furnaces. For oxy-combustion with flue gas recirculation the impact of CO2 on the rate of combustion of char combustion is still controversial. In the present paper the rate of carbon conversion in O2/CO2 mixtures typical of oxyfuel conditions has been investigated by conventional as well as innovative experimental techniques, respectively isothermal/non-isothermal thermogravimetric analysis and reaction in an aerodynamic levitator particle reactor (ALPR). Results show that the ALPR provides reliable results also at values of temperature and oxygen concentration where thermogravimetric analysis fails. Experimental results have been worked out to obtain simple rate expressions for oxy-fuel combustion. Commonly used kinetic laws, however, proved unable to fit the experimental results in the whole range of operating conditions.
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2012.05.033