NOx reduction using amine reclaimer wastes (ARW) generated in post combustion CO2 capture

Deshai Botheju; Peter Glarborg; Lars-Andre Tokheim

doi:10.1016/j.ijggc.2012.05.015

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

Deshai Botheju, Peter Glarborg, Lars-Andre Tokheim

University of South-Eastern Norway

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

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

Original language	English
Journal	International Journal of Greenhouse Gas Control
Volume	10
Pages (from-to)	33-45
ISSN	1750-5836
DOIs	https://doi.org/10.1016/j.ijggc.2012.05.015
Publication status	Published - 2012

Bibliographical note

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.

Keywords

Amine reclaimer waste
Combustion
CO2 capture
Monoethanolamine
NOx reduction

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@article{133dd95c5b66404dafe438733ea40682,

title = "NOx reduction using amine reclaimer wastes (ARW) generated in post combustion CO2 capture",

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

keywords = "Amine reclaimer waste, Combustion, CO2 capture, Monoethanolamine, NOx reduction",

author = "Deshai Botheju and Peter Glarborg and Lars-Andre Tokheim",

note = "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.",

year = "2012",

doi = "10.1016/j.ijggc.2012.05.015",

language = "English",

volume = "10",

pages = "33--45",

journal = "International Journal of Greenhouse Gas Control",

issn = "1750-5836",

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TY - JOUR

T1 - NOx 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 - Amine reclaimer wastes (ARW) generated in CO2 capture processes demand suitable disposal means. Such wastes contain remaining amine, NH3 and other degradation compounds. This study investigated the potential of using ARW as a NOx reducing agent, under laboratory conditions in a flow reactor. A simulated flue gas containing about 500 ppm of NO and 5% O2 was injected with liquid ARW under different stoichiometric ratios (TN/NO – total N to nitric oxide ratio) and temperatures. The ARW was obtained from a distillation monoethanolamine reclaimer in an industrial CO2 capture facility with a coal fired boiler. The results indicate that ARW has a significant NOx reduction potential when injected with TN/NO ratios in excess of 1. The optimum temperature is close to 950 ◦C, where 40% reduction in NOx is recorded with a TN/NO ratio of 1.6. Increasing TN/NO to 8.5 resulted in a 96% reduction. At low TN/NO ratios (<1.6), the NOx reduction potential of ARW is comparable to that of monoethanolamine, but lower than that of NH3. Nevertheless, the fact that ARW is a waste product, together with its demonstrated NOx reduction capability and its calorific value contribution, makes it attractive as an additive to combustion processes, including cement industry kilns.

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

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

SN - 1750-5836

VL - 10

SP - 33

EP - 45

JO - International Journal of Greenhouse Gas Control

JF - International Journal of Greenhouse Gas Control

ER -