成型磁性污泥活性炭的制备与分析-《郑州大学学报(工学版)》

文章信息/Info

Title:: The preparation and analysis of shaped magnetic sludge activated carbon

Author(s):: Xu Zhengtan Liu Xinxin; School of Ecological Environment and Urban Construction, Fujian Institute of Technology, Fuzhou, Fujian, 350108 School of Ecological Environment and Urban Construction, Fujian Institute of Engineering, Fuzhou, Fujian 350108

摘要:: 以城市污泥为原料,经氯化锌活化-管式炉热解、活性炭/铁氧化物共沉淀及粘接挤压成型制得一种新型磁性污泥活性炭,并通过正交实验和BET、SEM、IR及磁强测定等方法对活性炭制备工艺、各步产物的微观形貌与性能进行了系统研究.结果表明:在氯化锌活化剂浓度为3 mol/L、热解温度650℃、热解时间2h、液固比2:1的制备条件下,所得污泥活性炭碘值达334.6 mg/g,活性炭、磁化活性炭、成型磁化活性炭比表面积均≥300 m2/g,由于该材料使用后可经磁铁方便分离,预期具有很好的实际应用前景.

Abstract:: Using municipal sludge as raw material, a new type of magnetic sludge activated carbon was prepared through zinc chloride activation-tube furnace pyrolysis, activated carbon/iron oxide co-precipitation and bonding extrusion molding, and through orthogonal experiments and BET, SEM, IR and magnetic intensity measurement were used to systematically study the preparation process of activated carbon, the microscopic morphology and properties of the products in each step. The results showed that: when the zinc chloride activator concentration was 3 mol/L, the pyrolysis temperature was 650 °C, Under the preparation conditions of pyrolysis time of 2 hours and liquid-solid ratio of 2:1, the iodine value of the obtained sludge activated carbon reached 334.6 mg/g, and the specific surface area of activated carbon, magnetized activated carbon, and shaped magnetized activated carbon were all ≥300 m2/g. It can be easily separated by a magnet, and it is expected to have a good practical application prospect.