摘要:
研究空气干燥基无烟煤对甲烷(CH4)的等温吸附/解吸特性,发现其对甲烷的解吸残余率达56%。为了对其进行深入探讨,特设计了原煤样的炭化和活化实验,扩大了原料的比表面积,进而在等温条件下研究了两个改性样品对甲烷的吸附/解吸特性。对比发现,比表面积的增大能显著增加样品对甲烷的吸附总量,但对解吸残余率没有明显的影响。考虑到影响甲烷吸附/解吸的因素,又在等温条件下对主控因素——水分作了平行实验,结果显示,水分对活化样解吸残余率有明显影响。
Abstract:
Studying adsorption/desorption character of anthracite on air dry basis in CH4 isotherm experiments was performed,and the result shown that the desorption hysteresis is obvious and remainder percentage of CH4 is as high as 56%.To make further study designed the experiment of pyrolysis and activation of coal to increase the specific surface area of coal sample,then researched adsorption/desorption character of coal,carbon and activated carbon in CH4 isotherm experiments,found that the amount of adsorption is evidently increasing with increase of specific surface area,while remainder percentage is not so markedly change as commonly expected,moisture,one of the most important factors in result,is examined.The result shown that the moisture can obviously affect desorption remainder percentage of activation sample.
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