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低温甲醇洗合成气净化技术在全球位置举足轻重,尤其在煤气化领域。重油气化和煤气化后产生的原料气中主要有效成分是H2和CO,其余的CO2、少量H2S/COS等成分需要除去。作为一个纯粹的物理吸收过程,低温甲醇洗工艺在低温和高压下用液相有机极性溶剂—甲醇来脱除这些酸性气,甲醇作为吸收剂的优势是:甲醇容易获得,有很高的稳定性,CO2和H2S/COS在甲醇中具有很好的溶解性,因此只需要一小部分甲醇进行循环,能耗低。
Low temperature methanol wash syngas purification technology in the global position, especially in the field of coal gasification. The main active components in the feed gas generated after heavy oil gasification and coal gasification are H2 and CO, and the remaining CO2 and a small amount of H2S / COS components need to be removed. As a purely physical absorption process, the low-temperature methanol wash process removes these acid gases at low temperature and pressure with liquid organic polar solvent-methanol. The advantages of methanol as an absorber are: Methanol is readily available with high stability Sex, CO2 and H2S / COS have very good solubility in methanol, so only a small portion of methanol is needed for circulation and low energy consumption.