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

    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

    Making nail polish while powering fuel cells

    Hydrogen is widely regarded as a promising and clean alternative energy source. The traditional source of hydrogen (H2) for fuel cell use is water, which is split into H2 and oxygen (O2). But O2 is a low-value product. So, this week in ACS Central Science, researchers report a new approach ... more

    Using espresso machines to do chemistry

    Many chemists are familiar with taking trips to the espresso machine while running late-night experiments, but until now these excursions were merely undertaken for the caffeine boost. A group recently reported however, that espresso machines can quickly and inexpensively perform some compl ... more

  • Videos

    How to Keep Your Phone Battery Charged Longer

    The new iPhone is slimmer and faster than ever. But like most new generations of smartphones, its battery has pretty much stayed the same over the years. Short of carrying an external battery all the time, is there any way to extend the life of your smartphone battery? In the latest Reactio ... more

    Accidental Discoveries That Go Boom

    Chemistry usually involves precise measurements and careful testing in order to get significant results. But a bunch of notable discoveries happened by accident. In the second edition of our accidental discoveries series, get to know the stories of how TNT, dynamite and even air bags were d ... more

    Speakers get groovy with graphene

    Even today’s smallest portable speakers come in some kind of rigid acoustic cavity – that is, in a box. But now, Researchers at the Korea Advanced Institute of Science and Technology report a simple way to fabricate these once-elusive thermoacoustic speakers using graphene. 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