<abstract xmlns="http://www.w3.org/1999/xhtml">The presence of ammonia in ashes (i.e. ammonia slip) is a direct consequence of the methods used for denitrification – selective catalytic and non-catalytic reduction (SCR, SNCR). The excess unreacted ammonia used in both of these methods passes as a constituent to ash, impairing its properties, and thus affects the quality of the commercial product. The summary of the available methods for removing NH3 from fly ashes is presented. Both chemical and thermal methods of removing NH3are described. The results of the chemical methods depend on the kind of additional reagents used and composition of fly ashes. Thermal methods seem to be simpler and easier to use, but they are used mainly on the smaller scale.</abstract>

The presence of ammonia in ashes (i.e. ammonia slip) is a direct consequence of the methods used for denitrification – selective catalytic and non-catalytic reduction (SCR, SNCR). The excess unreacted ammonia used in both of these methods passes as a constituent to ash, impairing its properties, and thus affects the quality of the commercial product. The summary of the available methods for removing NH3 from fly ashes is presented. Both chemical and thermal methods of removing NH3are described. The results of the chemical methods depend on the kind of additional reagents used and composition of fly ashes. Thermal methods seem to be simpler and easier to use, but they are used mainly on the smaller scale.

Chemical and Thermal Methods for Removing Ammonia from Fly Ashes

Faculty of Chemical Engineering and Technology

Technical Transactions

This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 Public License.

{"article-title":"Chemical and Thermal Methods for Removing Ammonia from Fly Ashes"}

The presence of ammonia in ashes (i.e. ammonia slip) is a direct consequence of the methods used for denitrification – selective catalytic and non-catalytic...

Chemical and Thermal Methods for Removing Ammonia from Fly Ashes

Published Online: May 26, 2020

Page range: 31 - 50

DOI: https://doi.org/10.4467/2353737XCT.17.085.6561

Keywords
flyash, deammonisation

© 2020 Magdalena Mazur et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 Public License.

Chemical and Thermal Methods for Removing Ammonia from Fly Ashes

Published Online: May 26, 2020

Page range: 31 - 50

DOI: https://doi.org/10.4467/2353737XCT.17.085.6561

Keywordsflyash, deammonisation

© 2020 Magdalena Mazur et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 Public License.

Keywords
flyash, deammonisation