User Tools

Site Tools


  • Deutsch (German)
  • English
  • Français (French)
  • Italiano
co2_storage_more_2

What can I choose in the calculator?

The calculator lets you choose if the CO2 emitted during electricity generation from Combined gas cycle and Coal plants in Switzerland is captured and stored or not (0=no CCS, 1=all plants have CCS).

Carbon Capture and Storage (CCS)

image LeJean Hardin and Jamie Payne, via Wikimedia Commons, under CC BY-SA 3.0

Contents

  • Impact
  • Global market
  • Definition
  • Constraints
  • References

IMPACT – What are the impacts of CCS?

In Switzerland, applying CCS to Combined gas cycle and Coal plants will have the following impacts:

Energy system

image Increase primary energy demand.

image Likely to increase total fossil fuel consumption.

image Limited deployment potential in current Swiss energy system due to very small fossil based electricity generation capacity.

image Could decrease energy independence by requiring more fossil imports.

image Can be retrofitted to existing power plants although this may significantly increase the cost.

Environment & Climate

image Likely to reduce global CO2 emissions.

image May also reduce other emissions from fossil power plants.

Society & Economy

image Likely to increase the cost of the energy transition.

image May worsen balance of payments by increasing fossil imports.

image Could increase Confederation income from the tax on mineral oil under the current taxation system.

GLOBAL MARKET – What is the global market for CCS?

As of 2014 there are a total of 12 large scale integrated CCS projects that are in operation. Altogether , these projects can store about 25 million tonnes of CO2 per year. 95% of this capacity is to enhance the recovery of oil or gas from an existing oil or gas field. [1]

DEFINITION / CONSTRAINTS

DEFINITION - What is CCS?

Carbon capture and storage (CCS) refers to processes by which the CO2 in the flue gases of power plants (or industrial processes) are captured and then stored. The capture can take place either post-combustion using solvents such as amines or pre-combustion such as in integrated gasification combined cycle (IGCC) plants.

Carbon capture processes are already used commercially in other industrial processes but the application to the capture of CO2 from power plants is still largely at the demonstration phase.

The captured CO2 can be stored in underground storage locations, such as depleted oil or gas fields, or in saline aquifers, and must typically be compressed to high pressure to be pumped into these storage locations.

CONSTRAINTS - What are the key barriers facing CCS deployment?

• The main drawback of CCS technology is that the capture and compression processes involved are quite energy intensive and would reduce the net output of a coal (resp. natural gas) power plant by about 24-40% (resp. 11-22%), severely impacting on its economic viability [2]. CCS may thus only be economically justified in the context of high emitted CO2 taxes.

• Capture technology must still be scaled-up to full commercial scale.

• There is public concern—which may or may not be justified—regarding the injection of CO2 into storage locations near inhabited areas.

• Long term stability of CO2 storage sites must still be demonstrated.

REFERENCES

[1] Global CCS Institute, 2014, CCS Project Database.

[2] IPCC, Carbon Dioxide Capture and Storage, A Special Report of Working Group III of the Intergovernmental Panel on Climate Change, Sep. 2005.

You could leave a comment if you were logged in.
co2_storage_more_2.txt · Last modified: 2019/10/22 09:17 (external edit)