A Method for Preparing Macroporous Activated γ-Al2O3
Alumina with low apparent density was prepared by continuous concurrent gelation precess with aluminum sulfate A12(SO4)3 and sodium hydroxide (NaOH) as raw materials.XRD, TEM, nitrogen adsorption-desorption,mercury porosimetry, and TG-DSC were employed to characterize crystal phase, morphology, soecific surface area, and pore size diatrbution of the prepared samples.Influences of reaction pH, OH-concentration, and reaction time on apparent density and surface area were discussed.Results showde the better preparation conditions were:Al3+ concentration of 0.5mol/L, OH-concentration of 1.2mol/L, gelation pH of 9, reaction tempetature of 65℃, neutralization reaction time of 60 min and aging time of 120min.Under those conditions,the obtained alumina carriers exhibited the charecteristics of having apparent density not less than 0.32g/ml, surface areas not more than 200m2/g, and total pore volume not less than 1.2mL/g.In addition, pore volume of the pore whose pore radius greater than 100nm accounted for over 50% of the total pore volume.
alumina pore volume apparent density
Jinfeng Li
Zhengzhou Research Institute of Chalco,Zhengzhou China
国际会议
32th International Conference & Exhibition ICSOBA-2014(第32届国际铝土矿、氧化铝和铝工业技术学术年会)
郑州
英文
324-329
2014-10-12（万方平台首次上网日期，不代表论文的发表时间）