海绵铁负载锰脱硝催化剂的制备及性能研究

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中图分类号：X511 文献标志码：A

DOI： 10.7652/xjtuxb202601005 文章编号：0253-987X（2026）01-0041-12

Study on the Preparation and Performance of Manganese-Based Denitration Catalyst Supported on Sponge Iron

SONG Bo，SHEN Zhenxing，WANG Zitong，PENG Qin， XU Hongmei，YANG Liu，MO Xinyu （School of Energy and Power Engineering，Xi'an Jiaotong University，Xi'an 710049，China）

Abstract： To address the issue of nitrogen oxides （ NOx ） pollution control，a high-efficiency NH3 -selective catalytic reduction （ NH3 -SCR） denitration catalyst based on manganese supported on sponge iron （HMT） is developed. The HMT is modified with 2mol/L nitric acid， impregnated with a manganese precursor （mass fraction of 15% ），and calcined at 450∘C to obtain the denitration catalyst designated as HMT-2M-15Mn-450 . The denitration activity，resistance to sulfur and water poisoning，and long-term stability of HMT-2M-15Mn-450 are investigated in a fixed-bed reactor. The interaction between manganese and HMT in the HMT-2M-15Mn-450 catalyst is characterized using techniques such as X-ray difraction （XRD）， X-ray photoelectron spectroscopy （XPS），and scanning electron microscopy （SEM）. The results demonstrate that at a space velocity of 50000m3/h ，the NO conversion efficiency of HMT-2M-15Mn-450 exceeds 90% within the temperature range of 200— 250∘C . After 12 hours of continuous operation at 200∘C ，the NO conversion rate remains above 95% ，and the catalyst exhibits strong resistance to sulfur and water poisoning. The findings provide a valuable reference for the high-value utilization of iron-based mineralmaterials in the field of flue gas denitration.

Keywords： sponge iron; NH3 -selective catalytic reduction;catalyst;nitrogen oxide;denitration

氮氧化物（ NOx ）是大气主要污染物之一，它与酸雨、光化学烟雾等的形成密切相关[]。（剩余18045字）