合成气微量CO深度净化新方法实验研究

Experimental Investigation on a New Method for CO Deep Purification in Coal-Derived Syngas

传统的CO净化技术会造成变换气H_2的损失,为此本文提出通过在CO_2吸附塔出口段加入水气变换催化剂用于合成气CO的深度净化。首先证明了复合系统净化CO的热力学可行性,之后探索不同运行工况对CO净化性能的影响,最后进行了十循环连续测试。结果表明在真实合成气工况下(400℃,2 MPa,5.17%CO,20.8%CO_2,51.8%H_2,20.7%H_2O,1.60%Ar)复合系统具有较好的CO净化性能,其吸附剂利用率τ_(10),τ_(50),τ_(200)依次为0.090~0.337.0.417~0.723,0.699~0.810。

The conventional CO purification technologies for coal-derived syngas will cause problems such as H_2 loss,therefore,in this paper a new method to deal with trace amount of CO was proposed,in which water gas shift catalysts were introduced into the exit section of CO_2 adsorption towers.The thermodynamic feasibility by adopting this composite system to deep purify CO was proved,and the effects of different operation conditions on the CO purification efficiency were investigated.A ten-cycle experiment was tested to further investigate the CO purification efficiency of the new system.The results indicated that the composite system had perfect CO purification capacity in real syngas conditions（400℃.2 MPa,5.17%CO,20.8%CO_2,51.8%H_2,20.7%H_2O,1.60%Ar）,and the utilization ratio of the adsorbents τ10,T50,τ200 could reach 0.090～0.337,0.417～0.723,0.699～0.810,respectively.