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New Process Takes Energy From Coal Without Burning It

Posted by samzenpus on from the easy-to-clean dept.

rtoz writes "Ohio State students have come up with a scaled-down version of a power plant combustion system with a unique experimental design--one that chemically converts coal to heat while capturing 99 percent of the carbon dioxide produced in the reaction. Typical coal-fired power plants burn coal to heat water to make steam, which turns the turbines that produce electricity. In chemical looping, the coal isn't burned with fire, but instead chemically combusted in a sealed chamber so that it doesn't pollute the air. This new technology, called coal-direct chemical looping, was pioneered by Liang-Shih Fan, professor of chemical and biomolecular engineering and director of Ohio State's Clean Coal Research Laboratory."

7 of 365 comments (clear)

  1. Scaling is the Key! by Irate+Engineer · · Score: 4, Insightful

    Sounds nice, except for the 'combusted in a sealed chamber' bit. How is this going to scale up so they can feed 100 tons/hr through the plant cycle? That is the question.

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    1. Re:Scaling is the Key! by hairyfeet · · Score: 4, Insightful

      No matter how you slice it you're still left with an assload of carbon that has to go SOMEWHERE so what are you gonna do with it? Frankly that's always been the problem, what to do with all the waste that is left over. TFA I notice is awful light on the details about what EXACTLY if left after this chemical burning, is it a paste, a gel, powder, maybe i missed it but I couldn't find any clear answer on that.

      But at the end of the day that is still hundreds of tons of waste you are gonna have to put somewhere, the big question is where because as we saw with Yucca flats pretty much any place you pick is gonna have NIMBYs coming out the woodwork so what are you gonna do with it? This is why I've always supported the new nuclear reactors with reprocessing, it lets you re-use as much as possible until the waste is much smaller and has a much lower half life but no matter how you slice it the stuff left over is gonna have to be put somewhere.

      But like coal or hate it we are gonna end up having to use at least some of it because our power needs have gone nowhere but up and this at least sounds like the waste is in solid form instead of gas which will make handling and disposal easier, if not politically then at least physically.

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    2. Re:Scaling is the Key! by pixelpusher220 · · Score: 4, Insightful

      there is a reason why China is gonna have 25 new nuclear reactors up and running before we get a single one out of committee

      And that reason is quite simply, China does not care about it's people.

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    3. Re:Scaling is the Key! by serviscope_minor · · Score: 4, Insightful

      "Needs of the many outweigh the needs of the few" (ST reference) is the basic theme of China.

      You are forgetting that most of the western world, having industrialised earlier has been through the "let's trash the environment" stage, and after decades of rivers which burn or stink so badly they make a capital city nearly uninhabitable or spills of toxic waste which cause all sorts of nasty deaths, the western countries have solwly and painfully come to the realisation that it's actually not a very good idea to do all that.

      I think this has little to do with cultural values and much to do with industrialisation being difficult and because it is easier to mess things up than not, and therefore comes earlier on in the process.

      Also, it's a product of industrialising countries nort really quite realising how much they can mess stuff up until they experience it.

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  2. Re:Like healthy citarettes by Bill,+Shooter+of+Bul · · Score: 4, Insightful

    We already burn a crap load of coal for our electricity. Wouldn't it be great if we worked to make it clean-er ( at least in terms of soot and mercury released into the air)? There isn't much on the horizon that could replace coal over night. We should try to find something will all due haste, but it wouldn't hurt to get the low hanging fruit. Its pretty much what Obama is doing now and its a sensible approach.

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  3. Re:No emission-less by Raptoer · · Score: 4, Insightful

    Even if you don't sequester the carbon and just put it out a smoke stack you're still at an advantage over normal coal burning. One of the major problems with coal burning is not the CO2, but the fly ash that contains heavy metals and causes respiratory problems. This process allows for those heavy metals to be contained in the coal ash which is kept within the plant. Depending on the concentration of metals in the ash it may be economical to mine the ash.

    Additionally since the CO2 is pure it can be used industrially without having to distill out the nitrogen that you would if you got it from regular burning.

  4. Re:Bullshit by hedwards · · Score: 4, Insightful

    Coal isn't clean though. This would clean up the side of the equation where you're burning it. But, it would do absolutely nothing for the mining aspect of it. Which is a huge mess as it stands. If you want to burn things for energy, you're better off starting with something like trees which are mostly carbon neutral as it is.

    Sure, it's technically clean if you ignore the incredible damage that it reeks on the landscape, but it's definitely not clean in a practical sense.