本文選題：氧化銅 + 脫臭��； 參考：《哈爾濱理工大學(xué)》2015年碩士論文

【摘要】：針對惡臭污染源排放惡臭氣體的特點(diǎn)，有必要開發(fā)廉價且能夠在室溫下脫除惡臭氣體的材料。而室溫條件下為了提高脫硫劑的活性，就要減小脫硫劑的粒徑，降低開發(fā)成本，因此研究高活性的室溫納米銅基脫硫劑具有重要的意義。 采用直接沉淀法制備出元素?fù)诫s改性的納米銅基復(fù)合材料，探討了脫硫劑結(jié)構(gòu)與脫硫性能的關(guān)系。研究表明，單元素?fù)诫s均可使納米氧化銅脫硫劑的脫硫活性提高，其中鐵、鈷和鈰元素的摻雜對納米氧化銅活性的提高要略好于鋅摻雜；雙元素?fù)诫s中Fe/Zn/CuO和Co/Ce/CuO復(fù)合脫硫劑的活性最具優(yōu)勢，當(dāng)Fe:Zn:Cu原子比為2:1:25時（Fe/Zn/CuO），其H2S的穿透時間為400min；Co:Ce:Cu原子比為3:3:50時（Co/Ce/CuO），其H2S的穿透時間可達(dá)到540min，且兩種脫硫劑對甲硫醇也具有較好的脫除效果。XRD、TEM和XPS等表征手段對元素?fù)诫s納米氧化銅的結(jié)構(gòu)進(jìn)行分析結(jié)果表明：不同元素?fù)诫s到納米氧化銅中，材料的主體成分仍為納米氧化銅；XPS擬合數(shù)據(jù)顯示，納米氧化銅和元素?fù)诫s后材料表面均含有Cu2+δ和Cu2+，且Cu2+δ/Cu2+的摩爾比值與脫硫劑活性呈現(xiàn)出明顯的相關(guān)性，即Cu2+δ/Cu2+比值越大，脫硫效果越好。而Cu2+δ/Cu2+摩爾比值的增加，說明材料表面能形成更多的氧空位，有利于H2S中的硫和銅的結(jié)合，提高了脫硫活性。 為研究納米銅基復(fù)合材料的成型及硫化再生性能，通過對成型粘結(jié)劑的選擇，確定了Fe/Zn/CuO的成型條件，并對其進(jìn)行了再生實(shí)驗(yàn)研究。結(jié)果表明，成型后脫硫劑的有效成分為仍為氧化銅，成型后脫硫劑的機(jī)械強(qiáng)度增大，比表面積和孔體積減小，H2S的穿透時間能達(dá)到240min；同時，成型脫硫劑對硫化氫和甲硫醇均可進(jìn)行再生使用，其中硫化氫可進(jìn)行4次再生，累計穿透時間可達(dá)500min，，具備吸附多種硫系惡臭氣體的能力，具有工業(yè)應(yīng)用潛力。
[Abstract]:It is necessary to develop cheap materials which can remove odor gases at room temperature according to the characteristics of odor pollution sources.In order to improve the activity of desulfurizer at room temperature, it is necessary to reduce the particle size of desulfurizer and reduce the development cost. Therefore, it is of great significance to study the high-activity nano-cupric based desulfurizer at room temperature.Nano-copper matrix composites modified by elemental doping were prepared by direct precipitation method. The relationship between the structure of desulphurizer and desulfurization performance was discussed.The results show that the desulfurization activity of nano-copper oxide desulfurizer can be improved by single element doping, and the doping of iron, cobalt and cerium can improve the activity of nano-copper oxide slightly better than that of zinc doping.The activity of Fe/Zn/CuO and Co/Ce/CuO composite desulphurizer is the most advantageous in the double element doping.When the Fe:Zn:Cu atom ratio is 2:1:25, the penetration time of H _ 2S is 400min Co: ce: Cu = 3:3:50, and the penetration time of H _ 2S can reach 540mins. Moreover, the two desulfurizers have better removal effect for methylmercaptan. XRDX TEM and XPS have also been used to characterize the elemental doping of nanocrystalline.The results of structure analysis of copper oxide show that different elements are doped into nanometer copper oxide.Cu2 未 and Cu2 were found on the surface of nano-copper oxide and elemental doped materials, and the molar ratio of Cu2 未 / Cu _ 2 was significantly correlated with the activity of desulfurizer, that is, the larger the Cu2 未 / Cu _ 2 ratio, the higher the Cu2 未 / Cu _ 2 ratio.The better the desulphurization effect.The increase of the molar ratio of Cu2 未 / Cu 2 indicates that more oxygen vacancies can be formed on the surface of the material, which is favorable to the combination of sulfur and copper in H 2S and improves the desulfurization activity.In order to study the molding and vulcanization properties of nano-copper matrix composites, the forming conditions of Fe/Zn/CuO were determined through the selection of forming binder, and the regeneration experiments were carried out.The results showed that the effective component of the desulfurizer was still copper oxide, the mechanical strength of the desulfurizer increased, the penetration time of specific surface area and pore volume decreased to 240 min,Both hydrogen sulfide and methyl mercaptan can be regenerated by the molded desulfurizer. Hydrogen sulfide can be regenerated for 4 times, and the cumulative penetration time can reach 500 min. It has the ability to adsorb many kinds of sulfur malodorous gases and has the potential of industrial application.
【學(xué)位授予單位】：哈爾濱理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB33;TQ131.21

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