Inorganic Chemicals Industry ›› 2023, Vol. 55 ›› Issue (9): 66-74.doi: 10.19964/j.issn.1006-4990.2023-0176

• Research & Development • Previous Articles     Next Articles

Study on preparation of γ-Al2O3 by microreaction and its properties for methyl orange adsorption

WANG Mengdi(), LUO Jin, WU Wei, ZHOU Jinghui, WANG Jing, SUN Yanmin, YU Haibin   

  1. CenerTech Tianjin Chemical Research and Design Institute Co. ,Ltd. ,Tianjin 300131,China
  • Received:2023-03-29 Online:2023-09-10 Published:2023-09-19

Abstract:

Using aluminum sulfate as aluminum source and ammonium bicarbonate as precipitator,pseudo-boehmite was prepared in a multi-channel impinging-flow microreactor.The pseudo-boehmite was calcined at 600 ℃ for 4 h to obtain γ-Al2O3.The γ-Al2O3 were characterized by fourier infrared spectroscopy,X-ray diffractometry,thermogravimetric differential thermal analyzer,field emission scanning electron microscopy,transmission electron microscopy,specific surface area and porosity analysis,ultraviolet spectrophotometer and Zeta potential analyzer.The adsorption properties of γ-Al2O3 prepared by different methods on methyl orange were studied.The results showed that the adsorption properties of γ-Al2O3 prepared by microreaction method was higher than conventional titration method.The adsorption process of methyl orange was consistent with Langmuir monomolecular layer model,and the adsorption kinetics was consistent with quasi-second-order kinetics.The optimum application conditions of γ-Al2O3 adsorbent were studied.Under optimal application conditions,the adsorption ratio of γ-Al2O3 to methyl orange was 58.8% within 5 min and 89.7% within 10 min and reached the highest 98.9% at adsorbed equilibrium.Cyclic experiments showed that γ-Al2O3 had excellent stability and maintained high decolorization ratio of methyl orange(95.6%) after four thermal regeneration cycles.

Key words: microchannel, alumina, adsorbent, methyl orange

CLC Number: