摘要
如何低成本地降低炼铁过程中的CO2排放是钢铁企业亟待解决的重要课题。电催化还原CO2技术可将CO2转化成可利用的燃料或产品,有望实现低成本降低CO2排放。通过采用含一定浓度的KNO2、KNO3和K2SO3的KHCO3电解液,模拟生产烟气中较高NOx和SOx浓度下在电解液中溶解反应生成的产物,研究了其对法拉第效率FECO和FEH2随电催化时间变化的影响。结果表明,KNO2、KNO3和K2SO3都会对电催化还原CO2性能造成不利影响,且相较SOx,虽NOx溶解产物对电催化还原CO2效率的降低影响更大,但可以提高电催化稳定性。下一步应重点研究气相NOx和SOx对催化剂的影响,以及通过催化剂和电极开发来提高反应器对烟气的耐受性。
Reducing the CO2 emissions with low cost is crucial for iron-steel industry,which is one of the major contributors to CO2 emission.The electrochemical CO2 reduction hold promise to integrate with iron-steel process as it converts CO2 into valuable products.In this paper,the KHC03 electrolyte containing certain concentrations of KNO2,KNO3 and K2 SO3 was used to simulate the products formed by dissolution reaction in electrolyte at higher concentrations of NOX and SOX in flue gas.The effects of these products on the Faraday efficiency FECO and FEH2 with electrocatalytic time were studied.It is found that KNO2,KN03 and K2 SO3 impurities has adverse effects on the performance of electrocatalytic reduction CO2,and NOx dissolved products can reduce the efficiency of electrocatalytic reduction CO2 more seriously than SOx,but can improve the electrocatalytic stability.The next step is to study the effect of NOx and SOx on the catalyst,and to improve the resistance of the reactor to flue gas through the development of catalyst and electrode.
作者
徐泽霖
张怀东
吴宇明
李梦然
Sahil Garg
Thomas E.Rufford
李立业
Victor Rudolph
王国雄
Xu Zelin;Zhang Huaidong;Wu Yuming;Li Mengran;Sahil Garg;Thomas E.Rufford;Li Liye;Victor Rudolph;Wang Guoxiong(School of Chemical Engineering,the University of Queensland,St Lucia,Brisbane,Queensland,4072;HBIS Group Han steel Company,Handan,Hebei,056015;HBIS Group Research Institute,Shijiazhuang,Hebei,050023)
出处
《河北冶金》
2020年第12期35-39,共5页
Hebei Metallurgy
作者简介
徐泽霖(1996-),男,毕业于昆士兰大学化学工程专业,现从事化工、炼油方面的工作,E-mail:xzl0529@163.com。
