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首页> 美国卫生研究院文献>Materials >Application of Plasma Treatment in Preparation of Soybean Oil Factory Sludge Catalyst and Its Application in Selective Catalytic Oxidation (SCO) Denitration
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Application of Plasma Treatment in Preparation of Soybean Oil Factory Sludge Catalyst and Its Application in Selective Catalytic Oxidation (SCO) Denitration

机译：等离子体处理在豆油厂污泥催化剂制备中的应用及其在选择性催化氧化脱硝中的应用

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摘要

At present, the most commonly used denitration process is the selective catalytic reduction (SCR) method. However, in the SCR method, the service life of the catalyst is short, and the industrial operation cost is high. The selective catalytic oxidation absorption (SCO) method can be used in a low temperature environment, which greatly reduces energy consumption and cost. The C/N ratio of the sludge produced in the wastewater treatment process of the soybean oil plant used in this paper is 9.64, while the C/N ratio of the sludge produced by an urban sewage treatment plant is 10–20. This study shows that the smaller the C/N ratio, the better the denitration efficiency of the catalyst. Therefore, dried oil sludge is used as a catalyst carrier. The influence of different activation times, and LiOH concentrations, on catalyst activity were investigated in this paper. The denitration performance of catalysts prepared by different activation sequences was compared. The catalyst was characterized by Fourier Transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscope (SEM). The experimental results showed that: (1) When the concentration of the LiOH solution used for activation is 15%, and the activation time is four hours, the denitration effect of the catalyst is the best; (2) the catalyst prepared by activation before plasma roasting has the best catalytic activity.
机译：目前，最常用的脱硝工艺是选择性催化还原（SCR）方法。但是，在SCR法中，催化剂的使用寿命短，并且工业运行成本高。选择性催化氧化吸收（SCO）方法可用于低温环境，大大降低了能耗和成本。本文使用的豆油厂废水处理过程中产生的污泥的C / N比为9.64，而城市污水处理厂产生的污泥的C / N比为10-20。该研究表明，C / N比越小，催化剂的脱硝效率越好。因此，将干燥的油泥用作催化剂载体。本文研究了不同活化时间和LiOH浓度对催化剂活性的影响。比较了不同活化顺序制备的催化剂的脱硝性能。通过傅里叶变换红外光谱（FTIR），X射线衍射（XRD），X射线光电子能谱（XPS）和扫描电子显微镜（SEM）来表征催化剂。实验结果表明：（1）用于活化的LiOH溶液浓度为15％，活化时间为4小时时，催化剂的脱硝效果最佳； （2）在等离子焙烧之前通过活化制备的催化剂具有最佳的催化活性。

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