Ni-Fe bimetallic oxides 촉매의 CO, NO 가스상 오염물질 동시저감 특성 = Simultaneous Removal of Gas-Phase Pollutants CO and NO Using Ni-Fe Bimetallic Oxides Catalyst

다국어 초록 (Multilingual Abstract)

Many studies have been conducted on methods to remove air pollutants. Among them, arepresentative commercial technology for reducing nitrogen oxides (NOX) is selective catalytic reduction (SCR)using NH3 as a reductant. However, the NH3-SCR technology has problems, such as the need for additionalNH3 gas (Active-SCR), the fact that unreacted NH3 (slipped-NH3) in the reaction process can be re-oxidizedto NOX, and the facility system cost according to the added NH3 gas. In order to solve these problems, COgas that is naturally generated in industrial processes can be used, and NO and CO can be removed at thesame time using passive-SCR technology that does not require a separate injection of a reductant. In thisstudy, transition metals Ni and Fe were used as catalytic materials to replace expensive precious metals. Theresults confirmed that both NOX and CO removal efficiencies were about 90% or more in the catalyst withcombined Ni-Fe, compared to the single catalyst. The addition of Ni to the Fe catalyst increased the catalyticreducing power, which also affected the increase in acid sites. Therefore, it is expected that this catalyst cansimultaneously remove NO and CO without the use of NH3 gas. These results could be explained throughXRD, FT-IR, TEM, BET, H2-TPR and CO-TPD analyses, and compared to single catalysts, it was confirmedthat the catalyst had higher low-temperature desorption ability for CO as a reductant and reducing capability.