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Clean Electricity Production from Offshore Natural Gas (CEPONG)

S. Roussanalya,*, A. Aasena, R. Anantharamana, B. Danielsenb, L. Heme-De-Lacottec, J. Jakobsena, G. Nejic, A. Sødalb, P. Wahla, R. Dreuxd, and P. Rabeaud

a SINTEF Energy Research, 1D Kolbjørn Hejes vei, 7465 Trondheim, Norway b Sevan Marine ASA, 5 Kittelsbuktveien, 4836 Arendal, Norway

c TechnipFMC, 6-8 Allée de l’Arche Faubourg de l’Arche, 92973 Paris La Defense, France d Engie, 1 Place Samuel de Champlain, 92930 Paris La Defense, France

* Corresponding author: simon.roussanaly@sintef.no

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Plan

I. Motivation and aims of the CEPONG project

II. The CEPONG concept

III. CEPONG case studies

IV. Some results of the technical modelling

V. Next steps and conclusions

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I. Motivation and aims of the CEPONG project

• Motivation:

– Natural gas production and contribution to electricity production are increasing

– To reduce the climate impact of electricity, it is important to investigate the potential of alternative value chain for "natural gas power generation with CCS"

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Norwegian petroleum production 1970-2018 (Norwegian Petroleum Directorate)

• Aims of the project:

– Investigate the potential of the CEPONG concept for cost reduction of clean electricity production

– Identify under which condition the concept can become cost competitive

• "Market" considered:

– 1) Mainland to reduce national or European emissions

– 2) Offshore platforms to reduce the climate impact of O&G activities (represent 25% of Norwegian emissions)

• Type of gas (non-commercial/stranded), type of capture technologies, Integration with CO2-EOR/EGR, location, etc.

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II. The CEPONG concept Reference 1: NG power gen. with CCS onshore

Reference 2: Import of power from shore for O&G production platform

Onshore power market

Offshore Oil & Gas platforms

El.

CEPONG concept

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III. CEPONG case studies

• Two case studies have been developed in collaboration with partner for detailed assessment

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• First case study: floating CEPONG concept

– Natural gas extracted from a rich gas pipeline located in the Norwegian continental shelf

– Water depth beyond 100m, favourable to a floating platform

– Low CO2 content (1.2 %mol)

– Gas in-take to produce around 640 MW with CCS.

• Second case study: shallow water CEPONG concept

– Natural gas produced by a small gas field located in the Dutch continental shelf

– Water depth around 40 m, favourable to a fixed platform

– Higher CO2 content (7.7 %mol)

– Gas in-take to produce around 130 MW with CCS.

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IV. Some results of the technical modelling

• Assessment of the platform, power plant, CO2 capture, transport and storage, and electricity export

• Process simulation and design of the system

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CO2 capture process flow diagram

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IV. Some results of the technical modelling

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Scenario 1 Scenario 2

Location Norwegian

continental shelf

Dutch

continental shelf

Natural gas input [kg/s] 28.8 7.7

CO2 concentration in natural gas [%mol] 1.2 7.66

Water depth [m] 340 40

Type of platform [-] Floating Fixed

Number of gas turbines [-] 10 3

Number of steam turbines [-] 2 1

Gross power output [MW] 702 155

Net power output [MW] 638 130

Exhaust flue gas flow [kg/s] 1348 423

CO2 concentration in exhaust flue gas [%mol] 3.65 2.86

Captured CO2 flow [kg/s] 63 15.8

Number of absorbers [-] 5 2

Number of desorbers [-] 2 1

Specific capture and compression work [kJ/tCO2] 3.64 4.33

Distance to CO2 storage [km] 100 10

Type of CO2 storage [-] Saline Aquifer Saline Aquifer

Distance from the platform to the electricity delivery point [km] 750 140

Electricity current type for export Direct Current Direct Current

Power losses through electrical converter and cable [MW] 55 1

Power delivered to market [MW] 583 129

• Overall system performances

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IV. Some results of the technical modelling

• Layout of the offshore floating power plant platform with CCS

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Layout of the offshore floating power plant platform with CCS

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IV. Some results of the technical modelling

• Layout of the offshore fixed power plant platform with CCS

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V. Next steps and conclusions

• Next steps:

– Finalise the techno-economic evaluation of the concepts

– Evaluate reference cases and compare to the CEPONG concepts

• Supply to mainland to reduce National or European emissions

• Supply to offshore platforms to reduce the climate impact of O&G activities

– Identifying when the concept could become competitive is a key activity of the project

• Potential for cost saving in the CEPONG concept

– Running the power plant on non-commercial (stranded) natural gas

– Use of emerging capture technologies like membrane-based separation

– Impact of location and distances

– Utilizing captured CO2 for Enhanced Oil or Enhanced Gas Recovery (EOR/EGR)

– Taking advantage of the co-localisation of NG production, processing and CCS, and exploiting the synergies enabled by process integration.

– Project is planned to end in beginning of 2018

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V. Next steps and conclusions

• Initial conclusions:

– No technical show stopper currently identified

– In new concept such as this one, there is a value in going deeper than "simple" techno-economic evaluation

– Preliminary suggestion opportunities for cost reduction have been discussed

– The CEPONG concepts have:

• The potential to reduce the climate from power generation for mainland and offshore applications

• Could enable the development of natural gas fields currently considered as "stranded" or uneconomic

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Acknowledgement

This publication has been produced with the support of the CEPONG and CEPONG extension projects under the CLIMIT-Demo program of the Norwegian Research Council. The authors would like to thanks the following partners for their contributions: Engie, Gassnova, Statoil, and TechnipFMC.

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Clean Electricity Production from Offshore Natural Gas (CEPONG)

S. Roussanalya,*, A. Aasena, R. Anantharamana, B. Danielsenb, L. Heme-De-Lacottec, J. Jakobsena, G. Nejic, A. Sødalb, P. Wahla, R. Dreuxd, and P. Rabeaud

a SINTEF Energy Research, 1D Kolbjørn Hejes vei, 7465 Trondheim, Norway b Sevan Marine ASA, 5 Kittelsbuktveien, 4836 Arendal, Norway

c TechnipFMC, 6-8 Allée de l’Arche Faubourg de l’Arche, 92973 Paris La Defense, France d Engie, 1 Place Samuel de Champlain, 92930 Paris La Defense, France

* Corresponding author: simon.roussanaly@sintef.no