海藻酸辅助制备氧化铝小球的活性炭扩孔研究
Pore-Enlargement of Spherical Alumina Prepared by Alginate Assisted Method with Pore-Expanding Agent of Dispersed Activated Carbon

采用表面活性剂及乳液分散活性炭对海藻酸辅助制备的γ-Al 2O 3 小球进行扩孔，制备了孔容及平均孔径均较大的γ-Al 2O 3 小球.用氮吸附-脱附、机械强度测定仪、XRD、SEM、TG 等方法对样品进行表征，考察了分散剂类型、用量以及助剂的添加对活性炭扩孔的γ-Al 2O 3 小球孔结构及其他理化性质的影响. 结果表明：吐温-80、液体石蜡、活性炭与锌粉添加量分别为5%、5%、10%和0.1%时，γ-Al 2O 3小球的平均孔径与强度分别为12.6 nm与19.1 N/颗；活性炭及分散剂的添加均不会影响γ-Al 2O 3 小球的晶相；助剂锌粉的添加可促使活性炭充分燃烧，减少灰分的残留.
Spherical γ-Al 2O 3 with large pore volume and pore diameter was prepared using activated carbon dispersed in surfactant and emulsion as pore-enlarging methods. The samples were characterized by N 2 adsorption/desorption, tensile tester, XRD, SEM and TG. The effects of dispersant types, content and additive on the pore structure and other physicochemical properties of γ-Al 2O 3 were investigated. The results indicate that spherical γ-Al 2O 3 with pore diameter 12.6nm and hardness 19.1N can be achieved with the addition of TW-80 5%, liquid paraffin 5%, activated carbon 10% and zinc powder 0.1%. The addition of dispersants and activated carbon has no effect on the crystal phase of γ-Al 2O 3. Additive zinc can promote the complete combustion of activated carbon, and decrease residual ash from carbon