Worst case scenario study to assess the environmental impact of amine emissions from a CO2 capture plant

Abstract Use of amines is one of the leading technologies for post-combustion carbon dioxide capture from gas and coal-fired power plants. This study assesses the potential environmental impact of emissions to air that result from use of monoethanol amine (MEA) as an absorption solvent for the capture of carbon dioxide (CO2). Depending on operation conditions and installed reduction technology, emissions of MEA to the air due to solvent volatility losses are expected to be in the range of 0.01–0.8 kg/tonne CO2 captured. Literature data for human and environmental toxicity, together with atmospheric dispersion model calculations, were used to derive maximum tolerable emissions of amines from CO2 capture. To reflect operating conditions with typical and with elevated emissions, we defined a scenario MEA-LOW, with emissions of 40 t/year MEA and 5 t/year diethyl amine (DEYA), and a scenario MEA-HIGH, with emissions of 80 t/year MEA and 15 t/year DEYA. Maximum MEA deposition fluxes would exceed toxicity limits for aquatic organisms by about a factor of 3–7 depending on the scenario. Due to the formation of nitrosamines and nitramines, the estimated emissions of DEYA are close to or exceed safety limits for drinking water and aquatic ecosystems. The “worst case” scenario approach to determine maximum tolerable emissions of MEA and other amines is in particular useful when both expected environmental loads and the toxic effects are associated with high uncertainties.

[1]  Curt M. White,et al.  Degradation Pathways for Monoethanolamine in a CO2 Capture Facility , 2003 .

[2]  P. Manins,et al.  Year-long, high-resolution, urban airshed modelling: verification of TAPM predictions of smog and particles in Melbourne, Australia , 2003 .

[3]  Edward S Rubin,et al.  A technical, economic, and environmental assessment of amine-based CO2 capture technology for power plant greenhouse gas control. , 2002, Environmental science & technology.

[4]  P. Hurley,et al.  Evaluation of TAPM, a prognostic meteorological and air pollution model, using urban and rural point-source data , 2003 .

[5]  Gary T. Rochelle,et al.  Monoethanolamine Degradation: O2 Mass Transfer Effects under CO2 Capture Conditions , 2004 .

[6]  M A Butler,et al.  O(6)-methylguanine DNA adducts associated with occupational nitrosamine exposure. , 2000, Carcinogenesis.

[7]  Gary T. Rochelle,et al.  Amine Scrubbing for CO2 Capture , 2009, Science.

[8]  D. Grosjean.  Atmospheric Chemistry of Toxic Contaminants. 6. Nitrosamines: Dialkyl Nitrosamines and Nitrosomorpholine , 1991 .

[9]  Amornvadee Veawab,et al.  Environmental impacts of absorption-based CO2 capture unit for post-combustion treatment of flue gas from coal-fired power plant , 2007 .

[10]  R. Idem,et al.  Effects of Operating Variables on the Product Distribution and Reaction Pathways in the Oxidative Degradation of CO2-Loaded Aqueous MEA−MDEA Blends during CO2 Absorption from Flue Gas Streams , 2005 .

[11]  Edgar G Hertwich,et al.  Human and environmental impact assessment of postcombustion CO2 capture focusing on emissions from amine-based scrubbing solvents to air. , 2010, Environmental science & technology.

[12]  P. Hurley,et al.  Verification of a prognostic meteorological and air pollution model for year-long predictions in the Kwinana industrial region of Western Australia , 2001 .

[13]  Raphael Idem,et al.  Pathways for the Formation of Products of the Oxidative Degradation of CO2-Loaded Concentrated Aqueous Monoethanolamine Solutions during CO2 Absorption from Flue Gases , 2005 .

[14]  Joris Koornneef,et al.  Life cycle assessment of a pulverized coal power plant with post-combustion capture, transport and storage of CO2 , 2008 .

[15]  T. van Harmelen,et al.  The impacts of CO2 capture technologies on transboundary air pollution in the Netherlands , 2008 .

[16]  H H Dieter,et al.  Toxicological Guidelines for Monocyclic Nitro-, Amino- and Aminonitroaromatics, Nitramines, and Nitrate Esters in Drinking Water , 2005, Archives of environmental contamination and toxicology.

[17]  Peter J. Hurley,et al.  TAPM: a practical approach to prognostic meteorological and air pollution modelling , 2005, Environ. Model. Softw..

[18]  Peter J. Hurley,et al.  Modelling the Meteorology at the Cabauw Tower for 2005 , 2009 .

[19]  Edward S. Rubin,et al.  AN INTEGRATED MODELING FRAMEWORK FOR CARBON MANAGEMENT TECHNOLOGIES , 2004 .

[20]  Kristin Rist Sørheim,et al.  Environmental impact of amines , 2009 .

[21]  P. Hurley,et al.  An Evaluation and Inter-comparison of AUSPLUME, CALPUFF and TAPM - Part 1: The Kincaid and Indianapolis Field Datasets , 2005 .

[22]  M. Lag,et al.  Health effects of different amines and possible degradation products relevant for CO2 capture , 2009 .

[23]  J. Gibbins,et al.  Carbon Capture and Storage , 2008 .

[24]  D. DeMarini,et al.  Occurrence, genotoxicity, and carcinogenicity of regulated and emerging disinfection by-products in drinking water: a review and roadmap for research. , 2007, Mutation research.

[25]  M. Vighi,et al.  Biodegradation and toxicity of selected amines on aquatic organisms , 1980 .

[26]  D. Shapley.  Nitrosamines: scientists on the trail of prime suspect in urban cancer. , 1976, Science.

[27]  James N. Pitts,et al.  Photooxidation of aliphatic amines under simulated atmospheric conditions: formation of nitrosamines, nitramines, amides, and photochemical oxidant , 1978 .