My watch list
my.chemeurope.com  
Login  

A milestone for new carbon-dioxide capture/clean coal technology

22-Mar-2013

An innovative new process that releases the energy in coal without burning — while capturing carbon dioxide, the major greenhouse gas — has passed a milestone on the route to possible commercial use, scientists are reporting. Their study in the ACS journal Energy & Fuels describes results of a successful 200-hour test on a sub-pilot scale version of the technology using two inexpensive but highly polluting forms of coal.

Liang-Shih Fan and colleagues explain that carbon capture and sequestration ranks high among the approaches for reducing coal-related emissions of the carbon dioxide linked to global warming. This approach involves separating and collecting carbon dioxide before it leaves smokestacks. Fan's team has been working for more than a decade on two versions of carbon capture termed Syngas Chemical Looping (SCL) and Coal-Direct Chemical Looping (CDCL). They involve oxidizing coal, syngas or natural gas in a sealed chamber in the absence of the atmospheric oxygen involved in conventional burning. Metal compounds containing oxygen are in the chamber. They provide the oxygen for oxidation, take up coal's energy, release it as heat in a second chamber and circulate back for another run in the first chamber.

Their report describes the longest continuous operation of the CDCL test system. It operated successfully for 200 hours without an involuntary shutdown. The system used sub-bituminous and lignite coals, which are the main source of carbon dioxide emissions at U.S. coal-fired power plants. Carbon dioxide captured during operation had a purity of 99.5 percent.

Facts, background information, dossiers
More about American Chemical Society
  • News

    Mimicking bug eyes could brighten reflective signs and clothes

    That bright, reflective coating used on road signs, bicycles and clothing are important safety measures at night. They help drivers get to their destinations while avoiding bicyclists and pedestrians in low-light conditions. Now, inspired by the structure of insect eyes, scientists have dev ... more

    Rewritable material could help reduce paper waste

    Even in today's digital age, the world still relies on paper and ink, most of which ends up in landfills or recycling centers. To reduce this waste, scientists have now developed a low-cost, environmentally friendly way to create printed materials with rewritable paper. Their report on the ... more

    Shining a light on damage within polymers

    When it comes to even the most advanced materials, the adage "if it does not bend, it breaks" is often true. But before that final snap, most materials experience microscopic damage that could be fixed -- but only if you know it's there. In a study researchers introduce a new technique that ... more

  • Videos

    How Bacteria Make It Rain

    Did you know that the ocean launches bacteria and other goo into the atmosphere? And that those particles can seed clouds? Atmospheric chemist Kimberly Prather of UCSD and the Scripps Institution of Oceanography drops some serious knowledge on us. more

    The Nobel Prize in Chemistry

    In this episode of Speaking of Chemistry, we look at how three molecular machinists earned this year’s Nobel Prize in Chemistry. Apologies to our international posse: All times referenced in this video are based on us being in the Eastern Time Zone. more

    Have We Found All The Elements?

    Four elements have been added to the periodic table this year, completing the seventh row. However, these new elements are not naturally occurring. Scientists had to create them and overcome a number of challenges to do so. more

  • Events
    Conference
    22-08 – 26-08
    2021
    Boston, US

    262nd ACS National Meeting & Exposition

    The American Chemical Society conference 262nd ACS National Meeting & Exposition will take place in Boston, US from 2021-08-22 to 2021-08-26. more

    Conference
    21-03 – 25-03
    2021
    San Antonio, US

    261st ACS National Meeting & Exposition

    The American Chemical Society conference 261st ACS National Meeting & Exposition will take place in San Antonio, US from 2021-03-21 to 2021-03-25. more

    Conference
    23-08 – 27-08
    2020
    San Francisco, US

    260th ACS National Meeting & Exposition

    The American Chemical Society conference 260th ACS National Meeting & Exposition will take place in San Francisco, US from 2020-08-23 to 2020-08-27. more

Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE