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以含油污泥为原料,氢氧化钠为活化剂,在氮气保护下,通过室内静态热解炉制备高比表面积活性炭。研究炭化温度、活化升温方式、活化温度、活化时间和碱碳质量比m(NaOH)/m(C)对高比表面活性炭的影响。采用全自动比表面与孔隙度分析仪、钨灯丝环境扫描电子显微镜等测试设备,分别对产品的比表面积与孔径分布、组成及微观形貌进行定性或定量分析。研究结果表明,含油污泥制备高比表面积活性炭的较佳条件为:炭化温度500℃,活化升温方式(c),活化温度800℃,活化时间1 h,m(NaOH)/m(C)=2。采用本方法制备的活性炭比表面积大于2 000 m2/g,平均孔径小于2 nm,总孔容大于2 cm3/g,性能优于普通活性炭,可作为能源储存介质、电极材料、高效吸附剂的基础材料,为含油污泥的资源化利用提供了一条新途径。
Using oily sludge as raw material and sodium hydroxide as activator, high specific surface area activated carbon is prepared through indoor static pyrolysis furnace under the protection of nitrogen. The effects of carbonization temperature, activation temperature, activation temperature, activation time and alkali carbon mass ratio m (NaOH) / m (C) on high specific surface area activated carbon were investigated. The surface area and pore size distribution, composition and microstructure of the product were qualitatively and quantitatively analyzed by using automatic surface area and porosity analyzer and tungsten filament environment scanning electron microscope. The results show that the optimal conditions for preparing high specific surface area activated carbon from oily sludge are as follows: carbonization temperature 500 ℃, activation temperature increase method (c), activation temperature 800 ℃, activation time 1 h, m (NaOH) / m (C) 2. The activated carbon prepared by the method has a specific surface area of more than 2000 m2 / g, an average pore diameter of less than 2 nm and a total pore volume of more than 2 cm3 / g, which is better than common activated carbon and can be used as a basis for energy storage media, electrode materials and high-efficiency adsorbents Material, which provides a new way for the resource utilization of oily sludge.