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2016年6月20日星期一

[ News ]Taking carbon capture and storage a step further



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Holly Zhang

E-mail: sales4@sunraysteel.com

Mob: 86-13417960037 / Tel: 86-0757-63999952

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Address: 1507, A6, Hao Science Park, Guicheng, Nanhai District, Foshan, Guangdong, China.





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Emirates Steel in the UAE is taking part in an innovative and ambitious project whose aim is to capture, reuse and store 800,000 tonnes of carbon dioxide (CO2) from its steel plant annually.  The project is scheduled to be completed by 2016. The goal is to produce steel with lower carbon dioxide emissions to the atmosphere by capturing the CO2 produced in the iron and steel making process, injecting it into existing oil fields for enhanced oil recovery (EOR) and storing it at the same time.
The CO2 supply stream from the Emirates Steel plant, contains approximately 90% CO2, and will be transported to a compression and dehydration facility at the storage site in Mussafah. The CO2 will be compressed creating CO2 with a purity of 98%, then transported through 50km of pipeline network, and finally injected into an onshore oil field, operated by Abu Dhabi Company for Onshore Oil Operations.
This project was made possible thanks to the partnership between Masdar, the Abu Dhabi national clean energy conglomerate, and the Abu Dhabi National Oil Company (ADNOC). The joint venture was signed on 10 November 2013 and will consist of three key components:
• CO2 will be captured onsite at Emirates Steel, the UAE's largest steelmaking facility.
• The CO2 will then be compressed and transported along the 50km pipeline to oil fields operated by ADNOC.
• ADNOC will inject the CO2 into oil fields to enhance oil recovery, while storing the injected CO2 underground. 
The UAE has traditionally used hydrocarbon gases in some of the Abu Dhabi fields to enhance oil production. However, with the rise in energy demand, this Carbon Capture Usage and Storage project will allow the UAE to preserve its natural gas for domestic electricity generation.
The Emirates Steel Carbon Capture and Storage project complements other technologies to reduce carbon emissions currently being researched at a global scale:
  • ULCOS (Europe)
    ULCOS is the EU-sponsored Ultra-Low CO2 Steel-making project made up of a consortium of 48 European companies and organisations from 15 European countries. ULCOS is working on projects which ultimately could reduce carbon dioxide emissions from steel production by at least 50%. The most promising breakthrough technology been researched by ULCOS is the HIsarna process which is running in a pilot operation at the Tata Steel site in IJmuiden in the Netherlands. In this process fairly pure CO2 is produced which can be used for carbon capture and storage with little further cleaning necessary. The expected reduction in CO2 intensity per tonne of crude steel produced is 20% – 25%. To be able to be effective, this process will also rely on CCS to realise the 50% reduction in CO2 intensity or more.
     
  • COURSE-50 (Japan)
    This programme is strongly supported by the Japanese government as they are investing in the transportation, reuse and storage of the CO2. A number of projects have been established for a long period of time especially on storing CO2 in rock structure one or two kilometers underground. The sites have been significantly tested in recent earthquakes and no loss of CO2 has been detected by the sensors placed on the surface.
     
  • POSCO (South Korea)
    In Korea, POSCO runs its own programme to look at the adaptation of CCS to the Finex smelting reduction processes. They are also completing trials on capturing CO2 from a blast furnace which uses similar technology than that being researched by the ULCOS programme.
     
  • China Steel Corporation with Taiwan CCS Alliance coordination (Taiwan)
    Taiwan CCS Alliance is composed of 11 companies and organisations amongst which worldsteel member company, China Steel Corporation (CSC) is a participant. The Alliance is currently focusing their research activities on two main technologies: the oxy fuel burner technology which aims at purifying CO2 by burning without nitrogen content; and the chemical absorption pilot plant which seeks to further decrease energy consumption per unit of CO2 captured. Additionally academic cooperation projects in CSC include BOF slag carbonation and microalgae carbon fixation.
     
  • BlueScope Steel and OneSteel with CSIRO coordination (Australia)
    In Australia, CSIRO is working with BlueScope and OneSteel on two significant projects aimed at cutting CO2 emissions: biomass, which uses renewable carbon derived from biomass in steel manufacturing and heat recovery from molten slags through dry granulation, which captures the waste heat released from slag cooling, thus reducing CO2 emissions. These programmes have received large support from the Australian government.
Some of these R&D projects potentially can reduce CO2 emissions by more than 50%. Research is now focused on feasibility at various levels of production, from laboratory work to pilot plant development, demonstrators and eventually commercial implementation. However, initial R&D investment of several million dollars will be required for these projects to come to completion.
Further cuts in CO2 emissions will be achieved in future decades through the increased use of the R&D technologies currently funded, but also through the increased recycling of scrap and its use in the production process. According to the Global CCS Institute, around 70%-80% of emissions can be avoided by using scrap in steel production, avoiding the need for using carbon to reduce iron ore and by only using melted scrap. However, scrap and scrap availability is dependent on the cost of recovery and usually matches the economic level of iron-ore and coal requirement.  
The International Energy Agency 2013 roadmap demonstrates that CCS is an integral part of any lowest-cost mitigation scenario. The total CO2 capture and storage rate must grow from the thousands of tonnes captured in 2013 to billions of tonnes of CO2 in 2050 in order to address the emissions reduction challenge (2DS scenario).
The steel industry is fully aware of the need for implementing technological solutions to reduce carbon emissions to the atmosphere through CCS or other forms of breakthrough technologies and will continue to concentrate its efforts on this goal for decades to come.

2016年5月19日星期四

[ Wiki ] 5 Tips for Cleaning Stainless Steel



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Holly Zhang

E-mail: sales4@sunraysteel.com

Mob: 86-13417960037 / Tel: 86-0757-63999952

Skype: hollyzhang97

Facebook: https://www.facebook.com/zhang.holly.5

Address: 1507, A6, Hao Science Park, Guicheng, Nanhai District, Foshan, Guangdong, China.



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The distinctive shine of stainless steel is found everywhere you look -- from the kitchen sink to the pinnacle of the Chrysler Building. And no wonder: It's a high- performance marvel, an extremely durable material that does not corrode or rust. It doesn't stain easily, either, although it's not stain-proof. Low maintenance and distinctive luster make it popular for use in cookware, cutlery, hardware, and major appliances like refrigerators and stovetops, as well as surgical instruments and many industrial applications.
Stainless steel needs to be cleaned to look its best and to prevent corrosion. Oxygen from the atmosphere combines with the chromium in the stainless steel to form a passive chromium oxide film that protects the object from further corrosion. Any contamination on the surface by dirt or oils hampers this process and traps corrosive agents, reducing corrosion protection.
Luckily, stainless steel is easy to clean using several inexpensive methods. Unlike some materials, it thrives with frequent cleaning. It's impossible to wear out stainless steel by cleaning it too much.
Read on to learn more about cleaning stainless steel, from the gentlest methods to the most aggressive.

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It's true: Most of the time, stainless steel will come clean with warm water, with or without a gentle detergent. Simply rinse your stainless steel pots or cutlery in the sink and clean them with a gentle cloth. If you'd like, add a little of your favorite household detergent to make the job easier.
Sometimes water may contain mineral solids that can leave water spots on stainless steel, so wipe thoroughly with dry towels to keep your pots and pans or appliances looking their best.
Be sure to use this cleaning method first before you move on to other solutions. You may find a little warm water and suds will do the trick, and you don't need to bother with harsher cleaning solutions.

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For tougher food stains on pots and pans or dirt and grime build-up on your kitchen sink, mild non-scratching abrasive powders may be in order for a thorough cleaning. Typical household cleaners like Comet or Ajax will do the trick, but you can find many specialty stainless steel cleaners at your neighborhood grocery store. This method works wonders if you have a stainless steel grill on your deck, where it may accumulate dirt and grime from exposure to the elements. Panini makers or waffle irons may also benefit from a thorough cleansing.
Use cleaning compounds with warm water, soft bristle brushes, or clean cloths for best results. Don't use carbon steel brush or steel wool, because they can leave particles embedded on the surface that might lead to rusting.
After cleaning, always rinse with clean, hot water and enjoy the shine of your new-looking pots, pans, kitchen sink or appliance.

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A very effective and frugal cleaner for your stainless steelappliances may be hiding in your pantry: vinegar. Simply fill a spray bottle with undiluted white vinegar, spray on all your stainless steel surfaces, and wipe dry with a soft cloth.
This method works because the acetic acid in the vinegar cuts through the oil left behind by fingertips, rather than smearing it around like other cleaners. Some cooks use lemon juice, which has a similar effect.
Vinegar works well to remove stains that result from heat and hard water, even on cutlery. To remove them, apply white vinegar with a soft cloth and rub gently. Dry thoroughly to prevent a film from forming.

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Stainless steel appliances need to be cleaned often to maintain their shiny luster. Fingerprints can be the most troublesome marks to remove from the surface of smooth-polished or bright-finish stainless steel, such as an oven,microwave or a refrigerator.
Fortunately, fingerprints can be easily removed with a glass cleaner like Windex. Simply apply the cleaner with a soft rag and follow with a thorough warm water rinse. Fingerprints may be annoying, but you can relax knowing that they don't impact the corrosion resistant properties of stainless steel.
For especially stubborn fingerprints or surfaces, use a paste of sodium carbonate (soda ash) applied with a soft cloth. Be sure to rinse with warm water.

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Sometimes, you may notice a sticky film on your stovetop, hood, or grill that appears when the stainless steel comes into contact with grease from cooking or other contaminants. While grease or other soils may not be corrosive, they may compromise the availability of the stainless steel surface to maintain passivity (the ability to prevent corrosion).
To clean, simply pour a small amount of rubbing alcohol onto a soft cloth and rub until the greasy spots disappear. As with the other methods, be sure to rinse off the alcohol with warm water and dry the stainless steel to make it gleam like new!
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Sources
  • DoItYourself.com. "Cleaning Stainless Steel FAQs." (Nov. 14, 2010)
  • Martha Stewart Living. "Cleaning Stainless Steel." April 2006. (Nov. 15, 2010)
  • The Specialty Steel Industry of North America. "The Care and Cleaning of Stainless Steel"(Nov. 14, 2010)