Classification: Statoil internal Status: Draft

Increased Interest in Environmental Impacts of AminesGelein de Koeijer

9th IEA GHG International CO2 Capture Network

Copenhagen, 16-6-2006

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Reasons for increased interest

•Norwegian pollution control authorities required Statoil to give an assessment on possible substitutes for MDEA at the Snøhvit CO2capture site1

•Statoil and Shell are assessing the possibilities for building a CO2capture plant at Tjeldbergodden (Norway)

•Statoil’s aim to produce oil & gas with zero harmful emissions

1 http://www.sft.no/nyheter/brev/snohvit_klager_md230505.htm

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Emissions from CO2 capture plants

Source figure: SINTEF

Absorbent, NH3

reclaimer

Heat stablesalts +++

Absorbent, NH3

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Classification chemicals offshore Norway

Translated from Miljørapport 2004 Oljeindustriens Landsforening, http://www.olf.no/miljo/miljorapporter/?27220.pdf

YellowOther chemicals

RedBiodegradability < 20 %

RedInorganic and EC50 or LC50 ≤ 1 mg/l

RedTwo out of three categories: Biodegradability < 60 %

log Pow ≥ 3, lEC50 or LC50 ≤ 10 mg/l

BlackBiodegradibility < 20 % and toxicity EC50 or LC50 ≤ 10 mg/l

BlackBiodegradibility < 20 % and log Pow ≥ 5

BlackList over prioritised chemicals that are contained in ”resultatmål 1 (prioritetslisten) St.meld. nr 25 (2002-2003)”

BlackHormone disturbing chemicals

GreenChemicals on PLONOR list

GreenWater

Classification

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Amine based absorbents: general behaviour

Red:

Most tertiary amines (e.g. MDEA)

Some common activators (e.g. Piperazine, AEEA)

Some foam and corrosion inhibitors

Yellow:

Most primary and secondary amines (e.g. MEA)

Some sterically hindered amines (e.g. Flexsorb)

Some foam and corrosion inhibitors

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Historic emissions

Source:http://www.olf.no/miljo/miljorapporter/?27221.pdf

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Uncertainties

•Are the current classifications based on the latest results and correct test method?

•Are all aspects of bio-degradibility and eco-toxicity taken into account in the classification tests?

•Are all emissions fairly assessed?

•Are the classification tests valid for the specific site?

Answer: Integrated HSE tools

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Snøhvit LNG

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Assessing alternatives to MDEA

•Maximum loading of MDEA and alternative yellow amines

•Kinetics of MDEA and and alternative yellow amines

•Environmental tests of alternative yellow amines

•Test alternative yellow foam inhibitors

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Preliminary results: MDEA vs alternatives

CO2 loading

Log pCO2

MDEA

Alternative yellow

amines

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An industrial model for a CO2 value chain in Norway

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Summary

•Knowledge on environmental aspects of CO2 capture with amines is increasing at authorities

•Stricter requirements on environmental aspects for operators andsuppliers

•Legislation is becoming clearer

•Statoil R&D will increase activity on environmental aspects of CO2capture with amines

• Integrated HSE tools are needed, and under development