活性炭陶瓷复合材料的苯吸附特性

Activated carbon ceramics and its benzene absorption capacity

用硅藻土及木质活性炭为主要原料制备活性炭陶瓷复合材料,通过含炭量、碘吸附值、体积密度、气孔率和抗压强度测试确定最佳制备工艺条件。探讨该活性炭陶瓷复合材料对苯的吸附特性影响,对比分析了活性炭不同添加量、不同烧结温度及不同环境温度对材料苯吸附性能的影响。结果表明适宜的硅藻土与活性炭比值为7∶3,烧成温度为800℃,此时该材料的气孔率达到52.48%,体积密度为1.067 g/cm3,抗压强度为10.466 MPa,碘吸附值为291.24 mg/g,含炭量为25.62%,苯吸附率为9.56%,比表面积为290.72 m2/g。活性炭陶瓷复合材料的苯醛吸附率随着活性炭含量的增加明显加大,但受外界环境温度影响较小。

Diatomite and wood activated carbon were used to produce activated carbon ceramic composite materials.Effect of carbon content of the composites on properties such as iodine absorption,bulk density,porosity and compression strength of the materials were tested and thus the optimal process parameters were determined.The influence of activated carbon content and ambient temperatures on benzene removal capacity was also characterized.The results show that the optimal ratio（by mass） of diatomite to activated carbon is 7 to 3,and the optimal sintering temperature is 800 ℃.The materials with carbon content of 25.62% made under these conditions show the following properties： porosity of 52.48%,buck density of 1.067 g/cm3,compression strength of 10.466 MPa,iodine absorption of 291.24 mg/g,benzene absorption capacity of 9.56 and specific surface area of 290.72 m2/g.The benzene absorption capacity increased significantly with the increasing of activated carbon content but is merely affected by the ambient temperature.