Numerical study of the combustion and application of SNCR for NOx reduction in a lab-scale biomass boiler

Seyed Morteza Mousavi; Hesameddin Fatehi; Xue Song Bai

doi:10.1016/j.fuel.2021.120154

Numerical study of the combustion and application of SNCR for NO_x reduction in a lab-scale biomass boiler

Seyed Morteza Mousavi, Hesameddin Fatehi, Xue Song Bai

Fluid Mechanics

Research output: Contribution to journal › Article › peer-review

Abstract

In this paper, a numerical study of flow, reactions and NO_x emissions from a biomass boiler is presented. Detailed reaction mechanisms for the decomposition of tar species, combustion of hydrocarbons and formation of NO_x are employed by adopting appropriate reaction sets from literature. The proposed mechanism is used to perform CFD simulations of a laboratory-scale biomass boiler, and temperature and species concentrations are compared with the experimental data. NO_x formation and emissions are studied in detail and the contribution of different pathways for NO_x formation are identified. Furthermore, the CFD model is used to study the application of Selective Non-Catalytic Reduction (SNCR) method in this boiler. The effects of height and flow rate of ammonia injection on the performance of SNCR method are studied. It is observed that the SNCR, can reduce up to 63% of NO_x emissions.

Original language	English
Article number	120154
Journal	Fuel
Volume	293
DOIs	https://doi.org/10.1016/j.fuel.2021.120154
Publication status	Published - 2021

Subject classification (UKÄ)

Fluid Mechanics
Energy Engineering

Free keywords

Biomass combustion
CFD simulation
Detailed tar species
NO emissions
SNCR
Wood pellet boiler

Access to Document

10.1016/j.fuel.2021.120154

1 Doctoral Thesis (compilation)

Numerical modelling of biomass thermochemical conversion and potassium release
Mousavi, S. M., 2022 Nov 21, Printed in Sweden by MediaTryck, Lund University, Lund 2022: Department of Energy Sciences, Lund University. 255 p.
Research output: Thesis › Doctoral Thesis (compilation)

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Cite this

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abstract = "In this paper, a numerical study of flow, reactions and NOx emissions from a biomass boiler is presented. Detailed reaction mechanisms for the decomposition of tar species, combustion of hydrocarbons and formation of NOx are employed by adopting appropriate reaction sets from literature. The proposed mechanism is used to perform CFD simulations of a laboratory-scale biomass boiler, and temperature and species concentrations are compared with the experimental data. NOx formation and emissions are studied in detail and the contribution of different pathways for NOx formation are identified. Furthermore, the CFD model is used to study the application of Selective Non-Catalytic Reduction (SNCR) method in this boiler. The effects of height and flow rate of ammonia injection on the performance of SNCR method are studied. It is observed that the SNCR, can reduce up to 63% of NOx emissions.",

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AU - Mousavi, Seyed Morteza

AU - Fatehi, Hesameddin

AU - Bai, Xue Song

PY - 2021

Y1 - 2021

N2 - In this paper, a numerical study of flow, reactions and NOx emissions from a biomass boiler is presented. Detailed reaction mechanisms for the decomposition of tar species, combustion of hydrocarbons and formation of NOx are employed by adopting appropriate reaction sets from literature. The proposed mechanism is used to perform CFD simulations of a laboratory-scale biomass boiler, and temperature and species concentrations are compared with the experimental data. NOx formation and emissions are studied in detail and the contribution of different pathways for NOx formation are identified. Furthermore, the CFD model is used to study the application of Selective Non-Catalytic Reduction (SNCR) method in this boiler. The effects of height and flow rate of ammonia injection on the performance of SNCR method are studied. It is observed that the SNCR, can reduce up to 63% of NOx emissions.

AB - In this paper, a numerical study of flow, reactions and NOx emissions from a biomass boiler is presented. Detailed reaction mechanisms for the decomposition of tar species, combustion of hydrocarbons and formation of NOx are employed by adopting appropriate reaction sets from literature. The proposed mechanism is used to perform CFD simulations of a laboratory-scale biomass boiler, and temperature and species concentrations are compared with the experimental data. NOx formation and emissions are studied in detail and the contribution of different pathways for NOx formation are identified. Furthermore, the CFD model is used to study the application of Selective Non-Catalytic Reduction (SNCR) method in this boiler. The effects of height and flow rate of ammonia injection on the performance of SNCR method are studied. It is observed that the SNCR, can reduce up to 63% of NOx emissions.

KW - Biomass combustion

KW - CFD simulation

KW - Detailed tar species

KW - NO emissions

KW - SNCR

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