TY - JOUR

T1 - NO_x reduction using amine reclaimer wastes (ARW) generated in post combustion CO₂ capture

AU - Botheju,Deshai

AU - Glarborg,Peter

AU - Tokheim,Lars-Andre

N1 - Abbreviations: ARW, amine reclaimer wastes; CCS, CO2 capture and sequestration, carbon capture and storage; EU, European union; HEEDA, N-(2-hydroxyethyl)-ethylenediamine; HEIA, 1-(2-hydroxyethyl)-2-imidazolidone; HSS, heat stable salts; LHV, lower heating value; MEA, monoethanolamine; NTP, normal temperature and pressure; PCDD/F, polychlorinated dibenzo–p-dioxins and dibenzofurans; PTFE, polytetrafluoroethylene; SCR, selective catalytic reduction; SNCR, selective non-catalytic reduction; TN, total nitrogen; UV-RAS, ultra-violet resonant absorption spectroscopy.

PY - 2012

Y1 - 2012

N2 - <p>Amine reclaimer wastes (ARW) generated in CO₂ capture processes demand suitable disposal means.<br/> Such wastes contain remaining amine, NH3 and other degradation compounds. This study investigated<br/> the potential of using ARW as a NO_x reducing agent, under laboratory conditions in a flow reactor. A<br/> simulated flue gas containing about 500 ppm of NO and 5% O₂ was injected with liquid ARW under<br/> different stoichiometric ratios (TN/NO – total N to nitric oxide ratio) and temperatures. The ARW was<br/> obtained from a distillation monoethanolamine reclaimer in an industrial CO₂ capture facility with a coal<br/> fired boiler. The results indicate that ARW has a significant NOx reduction potential when injected with<br/> TN/NO ratios in excess of 1. The optimum temperature is close to 950 ◦C, where 40% reduction in NOx is<br/> recorded with a TN/NO ratio of 1.6. Increasing TN/NO to 8.5 resulted in a 96% reduction. At low TN/NO<br/> ratios (&lt;1.6), the NOx reduction potential of ARW is comparable to that of monoethanolamine, but lower<br/> than that of NH₃. Nevertheless, the fact that ARW is a waste product, together with its demonstrated NOx<br/> reduction capability and its calorific value contribution, makes it attractive as an additive to combustion<br/> processes, including cement industry kilns.</p>

AB - <p>Amine reclaimer wastes (ARW) generated in CO₂ capture processes demand suitable disposal means.<br/> Such wastes contain remaining amine, NH3 and other degradation compounds. This study investigated<br/> the potential of using ARW as a NO_x reducing agent, under laboratory conditions in a flow reactor. A<br/> simulated flue gas containing about 500 ppm of NO and 5% O₂ was injected with liquid ARW under<br/> different stoichiometric ratios (TN/NO – total N to nitric oxide ratio) and temperatures. The ARW was<br/> obtained from a distillation monoethanolamine reclaimer in an industrial CO₂ capture facility with a coal<br/> fired boiler. The results indicate that ARW has a significant NOx reduction potential when injected with<br/> TN/NO ratios in excess of 1. The optimum temperature is close to 950 ◦C, where 40% reduction in NOx is<br/> recorded with a TN/NO ratio of 1.6. Increasing TN/NO to 8.5 resulted in a 96% reduction. At low TN/NO<br/> ratios (&lt;1.6), the NOx reduction potential of ARW is comparable to that of monoethanolamine, but lower<br/> than that of NH₃. Nevertheless, the fact that ARW is a waste product, together with its demonstrated NOx<br/> reduction capability and its calorific value contribution, makes it attractive as an additive to combustion<br/> processes, including cement industry kilns.</p>

KW - Amine reclaimer waste

KW - Combustion

KW - CO2 capture

KW - Monoethanolamine

KW - NOx reduction

U2 - 10.1016/j.ijggc.2012.05.015

DO - 10.1016/j.ijggc.2012.05.015

M3 - Journal article

VL - 10

SP - 33

EP - 45

JO - International Journal of Greenhouse Gas Control

T2 - International Journal of Greenhouse Gas Control

JF - International Journal of Greenhouse Gas Control

SN - 1750-5836

ER -