Effect of ammonia injection on black liquor recovery boiler NOx emissions and ash chemistry

Margareta Lundberg*, Piia Niemi, Luc Maîtrejean, Patrik Yrjas, Tor Laurén, Anders Brink, Mikko Hupa

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedingConference contributionScientificpeer-review

1 Citation (Scopus)

Abstract

Selective Non-Catalytic NOx reduction based on ammonia injection has been tested in a 2000 tds/d recovery boiler. The results showed good reduction rates with limited ammonia slip over the load range 60-100%. For the other emissions, ammonia addition had no or minor impact. Special attention was paid to the ash chemistry to evaluate the potential for ammonium salt formation on the heating surfaces. Analyses of deposit samples together with thermodynamic equilibrium calculations show that this potential is limited and will not affect the deposit characteristics.

Original languageEnglish
Title of host publicationTAPPI Press - Engineering, Pulping and Environmental Conference 2008
Pages1437-1458
Number of pages22
Publication statusPublished - 2008
MoE publication typeA4 Article in a conference publication
EventEngineering, Pulping and Environmental Conference 2008, TAPPI - Portland, OR, United States
Duration: 24 Aug 200827 Aug 2008

Publication series

NameTAPPI Press - Engineering, Pulping and Environmental Conference 2008
Volume2

Conference

ConferenceEngineering, Pulping and Environmental Conference 2008, TAPPI
CountryUnited States
CityPortland, OR
Period24/08/0827/08/08

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