CO2减排技术

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12 Oct 2009
Source: E.R. Sawin et al., March 2009
The steel industry as part of the global CO2 emission picture
Emissions 2005 46GtCO2eq/y
4% 16%
21% of total emissions
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How the steel industry has stepped up to the challenge
12 Oct 2009
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Worldwide coordination of projects through the worldsteel CO2 Breakthrough Coordination initiative
• Bao Steel program • Shougang Plant is a model for energy efficiency • JISF CO2 Taskforce program for JFE, NSC, Sumitomo and Kobe
– Reduction of CO2 emissions from Blast Furnaces: iron ore reduction with other agents (hydrogen) ; reforming coke oven gas aiming at amplifying H2 content by utilizing waste heat ; high-strength and high reactivity coke for reduction with H2. – Capture of CO2 from Blast Furnace gas : chemical and physical absorption to capture, separate and recover CO2 ; reduction of energy requirement for capture, separation and recovery using waste heat from steel plants.
Emissions 2030 (BAU) 70GtCO2eq/y
10% 6%
28% of total emissions
*
5%
*
8%
*
6%
*
11%
*
8%
*
14%
6%
*
15%
16%
*
6%
*
18%
Cement Chemicals Iron & Steel Petroleum & gas Transport Buildings Other Agriculture Forestry
12 Oct 2009
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The CO2 challenge and the position of the steel industry
12 Oct 2009
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The CO2 challenge facing the world
• Increased anthropological CO2 emissions have resulted in a significant rise in the concentration of CO2 in the atmosphere, and will continue to do so in all but the most drastic scenarios. • There is a scientific consensus that increased levels of CO2 present a major risk of climate change. • The average surface temperature today is 0.76°C higher than before industrialization, and growth models predict it to rise by another 2 to 5ºC by 2100. • Consequences on life on Earth will be significant. • Effective policies will lead to huge costs for industry and society.
• Kick-off in 2003, with yearly coordination meetings. • Driven by the steel industry to mitigate climate change and regulatory requirements. • To be considered as a breakthrough, the technology must reduce CO2 emissions by at least 50% in the long term. • Many developments are ongoing worldwide and there is a need to coordinate efforts, preventing the waste of resources (people, funds, time). • Project development timelines range from 2010 to 2050, covering short-, medium- and long-term initiatives.
*
18%
18%
Source: McKinsey: Pathways to a Low-Carbon Economy
* 18%
dark part refers to indirect emission of power generation linked to each activity
*
• The steel industry is responsible (directly and indirectly) for 6% of the world’s CO2 emissions. • Effective abatement policies will lead to huge costs for industry and society.
CO2 Breakthrough Technologies
Michel Wurth
Member of the ArcelorMittal Group Management Board
worldsteel-43 Beijing, 12 October 2009
Agenda
• The CO2 challenge and the position of the steel industry • How the steel industry has stepped up to the challenge • ULCOS II – an ambitious European project
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ቤተ መጻሕፍቲ ባይዱ
International Negotiations Copenhagen
• What do we expect from governments in the next round of negotiations on climate change in Copenhagen? • “Different targets with different responsibilities in different regions” would have serious consequences for globally traded goods like steel. • Carbon leakage risk must be looked at carefully: steel trade flows will likely adjust according to the least cost opportunities and no global CO2 reduction will in fact be achieved. • An International Sector Agreement for steel on CO2 reduction could be an option but only if the major steel producing regions/countries are involved: EU, USA, Brazil, Russia, India, Japan, China, South-Korea. • How? Cooperation is required on CO2 reductions with timetables linked to technology exchanges and funding.
12 Oct 2009
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Steel is already well placed to be a sustainable material of the future
Advantages on the Process side
• Infinite recyclability, excellent recycling rate, and benchmark emissions over the entire lifecycle compared to other materials • Many incremental technological improvements over the last years, including : – Energy efficiency – Yield improvements – Use of scrap and DRI – Use of charcoal in BF • Management of by-products, and recovery of iron and alloying elements in waste
12 Oct 2009
Advantages on the Product side
• Use and further development of Advanced High Strength Steels (AHSS) in automotive and other applications • Novel roofing and cladding solutions (sometimes including photovoltaic solutions) to reduce energy consumption in buildings • Development of new steel grades for wind turbine towers to maximise efficiency • Development of new steel grades for use in thermal power plants, resisting to higher temperatures and pressure, thus allowing steam turbines to function more efficiently
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Ongoing projects followed by the worldsteel CO2 Breakthrough Coordination committee (1/3)
• AISI
– Gas-Solid Suspension Ironmaking Technology based on hydrogen reduction – Technical Feasibility of Steelmaking by Molten Oxide Electrolysis
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