Activated Carbon from Leather Shaving Waste, Part II. Effect of Char Demineralization and Activation Time on Surface Area and Pore Size Distribution

作者：Manera Christian; Poli Joao Vitor; Poletto Patricia; Ferreira Suelem Daiane; Dettmer Aline^*; Wander Paulo Roberto; Godinho Marcelo

来源：Journal of the American Leather Chemists Association, 2016, 111(11): 413-421.

Leather shaving wastes generated by the leather industry can be used for microporous activated carbon production. In this work, chrome leather shaving wastes were pyrolyzed in a semi continuous pilot screw reactor at 450 degrees C. The char obtained was activated using carbon dioxide in a tubular reactor at 900 degrees C. The effect of using nitrogen or carbon dioxide in the heating step of the activation process on the pore size distribution and cumulative pore volume was evaluated. Carbon dioxide reduced the pore volume in the mesopore region. Changing time in the carbon activation (4 and 6 h) was not significant on the surface area, increasing it from 757.9 m(2)g(-1) to 927.4 m(2)g(-1). However, the demineralization had a significant effect on the surface area, increasing it from 427.7 m(2)g(-1) to 927.4 m(2)g(-1) for 6 h of activation. The pore size distribution of non-demineralized activated carbon was very similar to the one of demineralized activated carbon, showing a cumulative pore volume mainly in the region of micropores.

• 出版日期2016-11