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首页> 外文期刊>Adsorption Science & Technology >Safe Separation of the Low-Concentration and Oxygen-Bearing Coal Mine Methane by Vacuum Pressure Swing Adsorption
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Safe Separation of the Low-Concentration and Oxygen-Bearing Coal Mine Methane by Vacuum Pressure Swing Adsorption

机译：真空变压吸附法安全分离低浓度含氧煤矿瓦斯

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摘要

Pressure swing adsorption (PSA) is a suitable method to enrich the concentration of methane in coal mine methane (CMM) separation processes. However, traditional PSA processes for low-concentration CMM can easily increase the concentration of methane to explosive limits, which subsequently increases the risk of explosion. In this paper, a novel PSA process for low-concentration CMM was studied. Using a mixture of activated carbon (AC) and carbon molecular sieve (CMS) as the adsorbent, this method ensures that the gaseous mixture adsorbed does not reach the explosive limits by adsorbing methane and part of the oxygen simultaneously. Using a two-bed vacuum PSA experimental apparatus, the low-concentration CMM was safely enriched from 20% to more than 30%, with CMS and AC mass ratio of 3.4. The results of experimental studies indicate that the mixture adsorbent (AC and CMS) has explosion-suppression and flameproof characteristics. The igniting resource (methane) will not explode even if it appears in the adsorbent layer and, in addition, the explosion will not propagate through the adsorbent layer if it happens in other areas.
机译：变压吸附（PSA）是一种在煤矿瓦斯（CMM）分离过程中提高甲烷浓度的合适方法。但是，用于低浓度三坐标测量机的传统PSA工艺很容易将甲烷浓度提高到爆炸极限，从而增加了爆炸的风险。本文研究了一种用于低浓度三坐标测量机的新型PSA工艺。使用活性炭（AC）和碳分子筛（CMS）的混合物作为吸附剂，该方法可确保通过同时吸附甲烷和部分氧气，吸附的气态混合物不会达到爆炸极限。使用两床真空PSA实验设备，可将低浓度CMM安全地从20％富集到30％以上，CMS和AC的质量比为3.4。实验研究结果表明，混合吸附剂（AC和CMS）具有爆炸抑制和阻燃特性。点火源（甲烷）即使出现在吸附剂层中也不会爆炸，此外，如果爆炸发生在其他区域，爆炸也不会通过吸附剂层传播。

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