Test method of supercritical carbon dioxide content in coal

Test method of supercritical carbon dioxide content in coal

  • CN 101,936,861 A
  • Filed: 07/30/2010
  • Published: 01/05/2011
  • Est. Priority Date: 07/30/2010
  • Status: Active Application
First Claim
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1. supercritical carbon dioxide Determination on content method in the coal comprises and adopts vacuum pump, coal sample jar, dioxide bottle, pressue device and determinator, it is characterized in that:

  • (a) measure coal sample jar (12) the inner space volume be located in the coal sample jar constant temperature water bath (13) in advance;

    open coal sample jar (12) all valves on the pipeline that are connected with vacuum pump (1), observe the pressure vacuum gauge (2) of vacuum pump (1), the pneumatics power of taking seriously is reduced to below the 0.4Pa, after continuing to vacuumize about 30 minutes, close link to each other with vacuum pump (1) all valves on the pipeline of coal sample jar (12);

    Open the micro-stop valve (F-1, F-2) between coal sample jar (12) and the inner space volume measuring instrument, measure the volume V of the inner space of coal sample jar (12);

    (b) close micro-stop valve (F-1), in coal sample jar (12), fill coal sample to be measured, sealing coal sample jar (12), water in the coal sample jar constant temperature water bath (13) is heated, coal sample jar (12) steady temperature that is located in the constant temperature water bath is reached more than 35 ℃

    , simultaneously the pipeline that is connected with coal sample jar (12) is carried out the auxilliary heating of electricity, and keep the temperature constant of the auxilliary heating pipe line of electricity to be about 40 ℃

    ;

    (c) open link to each other with vacuum pump (1) all valves on the pipeline of coal sample jar (12), coal sample jar (12) is vacuumized;

    (d) observe the pressure vacuum gauge (2) that is connected with vacuum pump (1), the pneumatics power of taking seriously is reduced to below the 0.4Pa, after continuing to vacuumize 4~

    6 hours, close link to each other with vacuum pump (1) all valves on the pipeline of coal sample jar (12), coal sample jar (12) taken out from coal sample jar constant temperature water bath (13) weigh, obtain the coal sample jar quality m under the vacuum state 0(e) open be connected with carbon dioxide cylinder (3) all valves on the pipeline of coal sample jar (12), unlatching is located at be connected with carbon dioxide cylinder (3) supercharge pump (5) on the pipeline of coal sample jar (12), supercharge pump (5) will be imported after the carbon dioxide supercharging of carbon dioxide cylinder (3) output in the coal sample jar (12) under the effect of air compressor (7), the pressure digital display meter (11) that observation coal sample jar (12) porch is connected with pressure transducer (10) is when pressure is pressurized to the equalized pressure 0.5~

    2MPa that exceeds the coal sample of surveying in the coal sample jar (12), and closing carbon dioxide gas bomb (3) enters all valves of coal sample jar (12) pipeline;

    (f) treat the interior coal sample adsorption equilibrium of coal sample jar (12) after 4~

    6 hours, the equalized pressure P shown in record pressure digital display meter this moment (11) 1, coal sample jar (12) taken out from coal sample jar constant temperature water bath (13) weigh, obtain equalized pressure P 1Following coal sample jar quality m 1, press following formula;

    n 10

    (m 1-m 0)/44 (1) Obtain at equalized pressure P 1Carbon dioxide content n in the following coal sample jar 10

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