Researchers at Aalto University have opened a pilot plant that converts CO2 and slag, the by-product of steel manufacturing, into a valuable mineral product.
The product, Precipitated Calcium Carbonate (PCC), is used in e.g. plastics, papers, rubbers and paints. The innovative plant represents the next stage prior commercialization of a new process that consumes CO2 in order to convert a low-value by-product into a highly valuable resource for industry.
The potential economic and environmental benefits of this new technology are significant. "We are turning the industrial solid by-product from steel-manufacturing into a product which is 50 times more valuable," says Arshe Said, a postgraduate researcher at Aalto University. "Also, this process actually consumes CO2 and acts as a CO2 sink which benefits the environment greatly."
Current methods of PCC production require burning large amounts of limestone. "The conventional method involves large mining activities and has high CO2 emissions," points out Sanni Eloneva, D.Sc. (Tech).
Carbon intensive manufacturing industries are coming under increasing pressure from bodies such as the EU to reduce greenhouse gas emissions. "We believe this pilot plant will help to efforts by these industries to conform with government imposed emissions and waste targets," explains Professor Mika Järvinen.
In 2010, 13% of the total steel slag produced in Europe (16 Mt) went to the landfill. "In theory, if all the calcium in this steel slag could be recovered, approximately 13 Mt PCC/year could be produced, simultaneously sequestering nearly 6 Mt CO2/year," Järvinen continues.
The highly promising new technology also has other potential advantages. "We are currently investigating the possibility of extracting other valuable materials from the slag after the extraction of calcium", says Said.
The pilot PCC plant is now running in Otaniemi campus of Aalto University. The method used in the pilot is based on the patent owned by Aalto University Foundation together with Åbo Akademi and Rautaruukki Oyj (now part of SSAB).
For More Information
+358 50 571 8886
+358 50 448 9666
+358 50 414 2593
Pilot plant video: http://youtube.com/watch?v=HqkeYyWGHO8
Press photos: http://materialbank.aalto.fi:80/public/40229e15c8C7.aspx
Researchers' article on the pilot plant: http://viewer.zmags.com/publication/649b3363#/649b3363/74, Project Magazine UK
Researchers' article on the technology: http://www.sciencedirect.com/science/article/pii/S0306261912009336
Sanni Eloneva´s Doctoral dissertation (2010): Reduction of CO2 emissions by mineral carbonation: steelmaking slags as raw material with a pure calcium carbonate end product, http://lib.tkk.fi/Diss/2010/isbn9789526034577/
The development work has been funded by Academy of Finland, Finnish Funding Agency for Innovation (Tekes) together with many companies, CLEEN Oy´s Carbon Capture and Storage research program (CCSP), and Aalto Center for Entrepreneuship (ACE).
Johanna Juselius | AlphaGalileo
Jelly with memory – predicting the leveling of com-mercial paints
15.12.2017 | Fraunhofer-Institut für Produktionstechnik und Automatisierung IPA
Fraunhofer researchers develop measuring system for ZF factory in Saarbrücken
21.11.2017 | Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP
DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.
Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
15.12.2017 | Power and Electrical Engineering
15.12.2017 | Materials Sciences
15.12.2017 | Life Sciences