A Simple Way to Produce gamma-Alumina From Aluminum Cans by Precipitation Reactions

作者：Adansa Ysla Franca^*; Martins Andre Rosa; Coelho Rodrigo Estevam; das Virgens Cesario Francisco; Daniela Ballarini Adriana; Carvalho Luciene Santos

来源：Materials Research, 2016, 19(5): 977-982.

DOI：10.1590/1980-5373-MR-2016-0310

• Precipitation
• gamma-Alumina
• Aluminum Cans
• High-energy Milling
• Recycling

In this paper, a new way for gamma-alumina synthesis was proposed, the raw material being aluminum powders obtained by high-energy milling of aluminum cans. This seems a good option for this metal recycling and energy saving, as well as hydrogen production. The materials were prepared by precipitation techniques, in which aluminum powders reacted with hydrochloric acid, giving aluminum chloride, which was subsequently transformed into aluminum hydroxide by reaction with ammonium hydroxide or sodium hydroxide as precipitant agents, and finally into gamma-alumina by calcination. Results showed that the used preparation methods gave a gamma-alumina structure, confirmed by XRD, with surface areas values (174 and 204 m(2) g(-1)) close to those of a commercial gamma-alumina Cyanamid Ketjen (180 m(2) g(-1)) or an alumina prepared by a typical precipitation route (203 m(2) g(-1)). Using sodium hydroxide as precipitant agent turned out to be more ecologically compatible since it did not release harmful environmental compounds.

• 出版日期2016-10