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首页> 美国卫生研究院文献>Scientific Reports >Preparation of MnOx Supported LiOH Activated Soybean Oil Sludge Catalyst and Its Analysis in Denitration Mechanism of Selective Catalytic Oxidation (SCO)
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Preparation of MnOx Supported LiOH Activated Soybean Oil Sludge Catalyst and Its Analysis in Denitration Mechanism of Selective Catalytic Oxidation (SCO)

机译：MnOx负载的LiOH活化大豆油渣催化剂的制备及其选择性催化氧化脱硝机理的分析

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摘要

Treatment with selective catalytic oxidation (SCO) is an effective technology applied recently for conversion of nitrogen oxides pollution control. In order to solve the problems of high cost and difficulties in practical application of SCO catalyst, it was put forward using the solid waste sludge from soybean oil plant as catalyst carrier to prepare denitration catalyst. The sludge was treated by alkaline activation and then MnOx-based sludge was prepared by impregnation. Finally, MnOx-based sludge was calcined in the muffle furnace. The effects of activation and calcination conditions on catalyst activity were investigated. Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the activity of the sludge based denitration catalyst, and the structure and activity of the sludge based denitration catalyst were furtherly confirmed. According to the achieved results, (1) after activated by LiOH with a mass concentration of 15% for 4 hours, the surface of the sludge catalyst has more alkali functional groups, making the denitration of sludge catalyst the best; (2) the MnOx-based catalyst calcined in the muffle furnace with calcination temperature of 450 °C for 4 hours has obvious denitration efficiency.
机译：选择性催化氧化（SCO）处理是最近应用于氮氧化物转化污染控制的一项有效技术。为了解决SCO催化剂成本高昂，难以实际应用的难题，提出了以豆油厂固体废物污泥为催化剂载体制备脱硝催化剂。通过碱活化处理污泥，然后通过浸渍制备基于MnOx的污泥。最后，在马弗炉中煅烧基于MnOx的污泥。研究了活化和煅烧条件对催化剂活性的影响。使用傅里叶变换红外（FTIR），X射线光电子能谱（XPS），X射线衍射（XRD）和扫描电子显微镜（SEM）来表征污泥基脱硝催化剂的活性以及其结构和活性进一步确认了基于污泥的脱硝催化剂。根据所获得的结果，（1）在质量浓度为15％的LiOH中活化4小时后，污泥催化剂的表面具有更多的碱官能团，使污泥催化剂的脱硝效果最好。 （2）在马弗炉中煅烧，煅烧温度为450 C，煅烧4小时，MnOx基催化剂具有明显的脱硝效率。

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