CARBON DIOXIDE CAPTURE Ferize VAHABOVA 20900917 GREENHOUSE EFFECT

CARBON DIOXIDE CAPTURE Ferize VAHABOVA 20900917

GREENHOUSE EFFECT Naturally occurring greenhouse gases normally trap some of the sun’s heat, keeping the planet from freezing. Human activities, such as the burning of fossil fuels, are increasing greenhouse gas levels, leading to an enhanced greenhouse effect.

GREENHOUSE GASES Gases that trap heat in the atmosphere are called greenhouse gases (GHG). At the global scale, the key greenhouse gases emitted by human activities are: • • Carbon dioxide (CO 2) Methane (CH 4) Nitrous oxide (N 2 O) Fluorinated gases (F gases)

GLOBAL CO 2 EMISSION BY SOURCE Photo Source: Carbon Dioxide Information Analysis Center

GLOBAL CO 2 EMISSION BY SOURCE Photo Source: Carbon Dioxide Information Analysis Center

GLOBAL CO 2 EMISSION BY COUNTRY Photo Source: EDGAR 4. 2 FT 2010 (JRC/PBL, 2012); BP, 2013; NBS China, 2013; USGS, 2013; WSA, 2013; NOAA, 2012

REDUCING CARBON DIOXIDE EMISSIONS Energy Efficiency Energy Conservation Fuel Switching Carbon Capture and Sequestration • Improving the insulation of buildings, traveling in more fuel efficient vehicles, and using more efficient electrical appliances are all ways to reduce energy consumption, and thus CO 2 emissions. • Reducing personal energy use by turning off lights and electronics when not in use reduces electricity demand. Reducing distance traveled in vehicles reduces petroleum consumption. • Producing more energy from renewable sources and using fuels with lower carbon contents are ways to reduce carbon emissions. • Carbon dioxide capture and sequestration is a set of technologies that can potentially greatly reduce CO 2 emissions.

CARBON CAPTURE AND SEQUESTRATION IS… … a three step process that includes: Capture of CO 2 from power plants or industrial processes Transport of the captured and compressed CO 2 Underground injection and geologic sequestration of the CO 2 into deep underground rock formations.

CARBON CAPTURE AND SEQUESTRATION Photo Source: Cooperative Research Centre for Greenhouse Gas Technologies.

CARBON DIOXIDE CAPTURE METHODS Pre – Combustion • Pre combustion CO 2 capture is a process where the carbon in the fuel is separated, or removed, before the combustion process. Post – Combustion • Post combustion CO 2 capture is a process where the CO 2 is separated, or removed, from a flue gas containing CO 2 mixed with other gasses, after the combustion process. Oxyfuel combustion • Is very similar to post combustion CO 2 capture. The main difference is that the combustion is carried out with pure oxygen instead of air. As a result the flue gas contains mainly CO 2 and water vapor, which can be easily separated.

PRE – COMBUSTION METHOD • • Pre combustion capture is applicable to integrated gasification combined cycle (IGCC) power plants, where solid fuel is converted into gaseous components ("syngas") by applying heat under pressure in the presence of steam and oxygen. Capture of the CO 2 is currently accomplished an acid gas removal (AGR) process of absorption in a solvent. Photo Source: Global CCS Institute Co 2 Capture Technologies Pre Combustion Capture, January 2012

TWO MAJOR TYPES OF ACID REMOVING SOLVENTS Chemical Absorbents: Chemical absorbents (e. g. , MDEA and other amines) react with the acid gases and require heat to reverse the reactions and release the acid gases. These processes generally have lower capital for AGR than physical solvents, but use larger amounts of steam heat for solvent regeneration. Physical Absorbents: Physical absorbents (e. g. , Selexol, Rectisol) dissolve acid gases preferentially with increasing pressure. The absorbed acid gases are released from the solvent when pressure is decreased and temperature is increased. Significantly less steam heat is required for solvent regeneration than with chemical solvents.

ADVANTAGE/DISADVANTAGES Synthesis gas is: • • • Concentrated in CO 2 High pressure Resulting in: • • DISADVANTAGES High CO 2 partial pressure Increased driving force for separation More technologies available for separation Potential for reduction in compression costs/loads • • Pre combustion is only applicable for new power plants because the capture process has to be an integrated part of the combustion process. Pre combustion technologies like IGCC are not as mature as post combustion capture technologies. Gas turbines running on hydrogen are a huge challenge.

POST COMBUSTION METHOD • Post combustion capture is primarily applicable to fossil fuel based systems such as conventional pulverized coal (PC) fired power plants, where the fuel is burned with air in a boiler to produce steam that drives a turbine/generator to produce electricity. Photo Source: Bellona Environmental CCS Team

THREE CAPTURE METHODS Adsorption refers to uptake of CO 2 molecules onto the surface another material – for example, adhering CO 2 molecules onto the surfaces of a solid sorbent such as 13 X zeolites. Potential disadvantages for adsorbents include particle attrition, handling of large volumes of sorbent and thermal management of large scale adsorber vessels. Membranes can separate CO 2 from flue gas by selectively permeating it through the membrane material. The major challenge for membranes comes from the potential fouling of the membrane surfaces from particulate matter, uncertainty about the performance and cost of large scale efficient vacuum pumps and compressors required for PCC, and the ability to integrate the process into a power plant. Absorption refers to the uptake of CO 2 into the bulk phase of another material. Today, absorption is a more mature technology than adsorption or membranes when it comes to post combustion CO 2 capture. The current proposed large scale CO 2 capture plants are to be based on absorption.

ABSORPTİON Amine Solvent Solution Capture Process is a standard industrial process for the production of CO 2. Amine solution reacts with the CO 2 to form a weak acid and water soluble salt. Chilled Ammonia Capture Process is an efficient and cost effective technology for CO 2 capture. Ammonia reacts with CO 2 to produce ammonia bicarbonate. Ammonia is also cheap and abundant, with a high CO 2 capacity and no degradation during the absorption / desorbtion process.

ADVANTAGE/DISADVANTAGE • • Can be retrofitted to existing plants It enables the continued deployment of the well established Pulverized Coal (PC) technology familiar to power industries worldwide The continued development of improved materials for Ultra Supercritical (USC) plants will increase the efficiency and reduce the CO 2 emissions of future PC plants The widespread R&D on improved sorbents and capture equipment should reduce the energy penalty of PCC capture. DISADVANTAGE • • • Amine processes are commercially available at relatively small scale and considerable re engineering and scale up is needed Power Loss Most sorbents need very pure flue gas to minimize sorbent usage and cost. Steam extraction for solvent regeneration reduces flow to low pressure turbine with significant operational impact on its efficiency and turn down capability. Water use is increased significantly with the addition of PCC particularly for water cooled plants.

OXYFUEL COMBUSTION • • • In traditional fossil fuelled power plants combustion is carried out by using air, with the nitrogen (N 2) in the air following the flue gas. An alternative is to use pure oxygen (O 2) instead of air in the combustion. The advantage of this so called oxyfuel technique is that the flue gas contains only steam and CO 2. These two components are easily separated through cooling, by which the water then condenses and a CO 2 rich gas stream is formed. The currently available technologies for pure oxygen production are based primarily on cryogenic separation of air. Here the air is cooled down below the boiling point before the liquefied oxygen, nitrogen and argon are separated. However, the high amount of energy involved in this process make it a very expensive process. Promising on going research to develop membranes that separate oxygen from air may drastically improve efficiently and lower capital investment costs.

OXYFUEL COMBUSTION FLOWCHART Photo Source: Global CCS Institute Co 2 Capture Technologies Oxyfuel Combustion Capture, January 2012

ADVANTAGE/DISADVANTAGE • No chemical operations or significant on site chemical inventory. • Up to 100 percent CO 2 can be captured through this process. • The best information available today (with the technology available today) is that oxy combustion with CO 2 capture should be at least competitive with pre and post combustion CO 2 capture and may have a slight cost advantage. DISADVANTAGE • • • It is not possible to develop sub scale oxy combustion technology at existing power plants. The combustion of fossil fuels and pure oxygen creates high material stress, hence the development of new materials is a prerequisite for deployment of this technology. It is expensive to produce pure oxygen, and research activities are ongoing worldwide to find new ways to produce oxygen.

R&D Solvents and Sorbents • Solvents and Sorbents for CO 2 separation from flue gas can be further enhanced to reduce cost, improve reaction rates and regeneration loads, and eliminate contamination from other pollutants. Advanced Membranes • Advanced Membranes for both oxygen separation and CO 2 capture are key enabling technologies. Chemical Looping • Chemical Looping processes that prevent direct contact of air and fuel offer the ability to produce a relatively pure stream of CO 2 that does not need to be separated from flue gas.

MEMBRANES • Membranes can be used for separating CO 2 from other gas components. The technology is available today but will take some years and further research before it may be available for large scale CO 2 capture at generation plant. Photo Source: Bellona Environmental CCS Team

CHEMICAL LOOPING • Chemical looping is a new technology for combustion with inherent CO 2 capture. It is a significant departure from traditional combustion methods. It is flameless combustion technology combining two reactors, one air reactor and one fuel reactor. Photo Source: Bellona Environmental CCS Team

INTEGRATED FUEL CELLS • Integrated fuel cells enable production of the clean energy carriers electricity and hydrogen from fossil fuel or bio fuel with ultra high efficiency and integrated CO 2 capture. Photo Source: Bellona Environmental CCS Team

ADSORPTION • CO 2 capture by adsorption is not yet a mature commercial technology, but is currently being tested at a laboratory scale. Research programs are underway with advances in the technological expected, paving the way for adsorption as a future solution for CO 2 capture. Photo Source: The Cooperative Research Centre for Greenhouse Gas Technologies

POST COMBUSTION CO 2 CAPTURE AND STORAGE, BRINDISI, ITALY. Photo Source: Enel Group

POST COMBUSTION CO 2 CAPTURE PILOT PLANT, PUERTOLLANO, SPAIN. Photo Source: ELCOGAS S. A. IGCC Power Plant

OXYFUEL PILOT PLANT, SPREMBERG, GERMANY. Photo Source: Vattenfall AB

CARBON EMISSION IN TURKEY Turkey's CO 2 Emissions by sector between 1990 2010 360, 000. 00 Energy Differen t. Industries 310, 000. 00 1995 2000 2005 2006 2007 2008 2009 2010 Data Source: Turkiye Istatistik Kurumu Transportation 260, 000. 00 Other 210, 000. 00 Cement 160, 000. 00 Total 110, 000. 00 60, 000. 00 Energy Differen t. Industries Transportation. Other Cement 10, 000. 00 Total

CARBON CAPTURE AND SEQUESTRATION IN TURKEY • In 2009, a project named “Türkiye'de Termik Santrallar ve Sanayi Tesislerinden Gelen Karbondioksit Emisyonu Envanterinin Çıkartılması ve Karbondioksitin Yeraltı Jeolojik Ortamlarda Depolanma Potansiyelinin Belirlenmesi” was held by ORTA DOĞU TEKNİK ÜNİVERSİTESİ PETROL ARAŞTIRMA MERKEZİ (ODTÜ PAL) and TÜRKİYE PETROLLERİ ANONİM ORTAKLIĞI (TPAO) • The aim of this project was to determine the suitable places in Turkey for CO 2 storage and to investigate the details of the project and make its economical analysis.

WHY CCS IS IMPORTANT? Carbon dioxide (CO 2) capture and sequestration (CCS) could play an important role in reducing greenhouse gas emissions, while enabling low carbon electricity generation from power plants. CCS could also viably be used to reduce emissions from industrial process such as cement production and natural gas processing facilities.

SEVERAL PLANTS WITH CCS PROJECTS FROM DIFFERENT CONTINENTS Data Source: Bellona Environmental CCS Team

REFERENCES • • • http: //www. epa. gov http: //energy. gov http: //www. globalccsinstitute. com http: //cdiac. ornl. gov http: //www. eie. gov. tr http: //www. tuik. gov. tr http: //www. enel. com http: //www. elcogas. es http: //corporate. vattenfall. com

THANKS FOR ATTENTION!