Date

2014

Document Type

Thesis

Degree

Master of Science

Department

Mechanical Engineering

First Adviser

Romero, Carlos E.

Abstract

The objective of this thesis is to investigate alternative reagents for Selective Non-Catalytic Reduction (SNCR) of nitrogen oxides (NOx) for coal-fired power plants. This thesis first reviews reported studies about available alternative reagents for SNCR NOx reduction processes. Monomethylamine is then selected as a major subject of study, because of its superior nitrogen oxides reduction performance at temperatures under 800 K. Additionally, available chemical kinetics mechanisms for monomethylamine suited for the SNCR NOx reduction process were modeled using the CHEMKIN software. From the chemical kinetics modeling, the detailed mechanism by Kantak et al. was selected to perform a sensitivity analysis. Two reduced mechanisms for monomethylamine are proposed. Finally, a monomethylamine-based SNCR NOx removal system for a natural gas turbine plant was modeled and estimate of the usage of reagent in such system was calculated. The results of the simulations in this study show that the potential of monomethylamine-based SNCR NOx reduction systems for full-scale power plants is promising and further laboratorial and field studies in this area would be valuable.

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