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<p>This study investigates the performance of H<sub>2</sub>-SCR catalysts as a function of MgO loading on oxide supports (CeO<sub>2</sub>–XMgO) prepared by the co-precipitation method for harmful exhaust gas redution. The physicochemical properties of H<sub>2</sub>-SCR were characterized using SEM-EDX, TEM, XRD, BET surface area, XPS, H<sub>2</sub>-TPR analyses, and NOx/CO reduction performance tests. The 0.75Pt–9.25MgO/CeO₂H<sub>2</sub>-SCR catalyst achieved NOx conversion rates of approximately 13% at 75&#xa0;°C and 44% at 125&#xa0;°C. Compared with four other types of H₂-SCR, this catalyst demonstrated enhanced low-temperature activity below 100&#xa0;°C and improved NOx reduction performance by 5–13% at temperatures above 250&#xa0;°C. Increasing the MgO loading on the oxide support led to decreased NOx and CO conversion rates. CeO<sub>2</sub>, with its oxidation ability and oxygen storage capacity (OSC), contributed significantly to catalytic activity, and the optimal MgO loading of 9.25 wt% resulted in improved reaction rates. Advanced research shall be conducted to significantly expand the impact of catalytic materials and their ability to reduce harmful gases.</p>

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Characteristics of Simultaneous Reduction of NOX and CO According to the Amount of MGO Loaded on the Oxide Support of H2-SCR Using Co-precipitation

  • 期刊论文

  • 发表日期：

    2026年2月26日

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  • Choong-kil Seo

摘要

This study investigates the performance of H2-SCR catalysts as a function of MgO loading on oxide supports (CeO2–XMgO) prepared by the co-precipitation method for harmful exhaust gas redution. The physicochemical properties of H2-SCR were characterized using SEM-EDX, TEM, XRD, BET surface area, XPS, H2-TPR analyses, and NOx/CO reduction performance tests. The 0.75Pt–9.25MgO/CeO₂H2-SCR catalyst achieved NOx conversion rates of approximately 13% at 75 °C and 44% at 125 °C. Compared with four other types of H₂-SCR, this catalyst demonstrated enhanced low-temperature activity below 100 °C and improved NOx reduction performance by 5–13% at temperatures above 250 °C. Increasing the MgO loading on the oxide support led to decreased NOx and CO conversion rates. CeO2, with its oxidation ability and oxygen storage capacity (OSC), contributed significantly to catalytic activity, and the optimal MgO loading of 9.25 wt% resulted in improved reaction rates. Advanced research shall be conducted to significantly expand the impact of catalytic materials and their ability to reduce harmful gases.