Production of Activated Carbon Using Chemical and Physical Activation of Citrus, Olive and Tamarisk's Waste Wood and Comparing their Characteristics
Abstract:
Activated carbon is produced from pyrolysis of plant material containing carbon and is undergoing activation. In this study, citrus, olive and tamarisk’s woods is used as raw materials to produce activated carbon, all samples were prepared from Darab city. The density measurement and moisture content and chemical analysis (cellulose, lignin, extractives, and ash) and also thermal analysis of wood samples show that there is no relation between carbon content with chemical analysis, but carbon content directly related to the density which is verified by DSC-TGA. Also, it has been seen that the thermal degradation of olivewood has been carried out at higher temperatures. The activated carbon was produced from wood samples in three methods; without activation, with physical activation (with steam) and chemical activation (with zinc chloride), and their properties (such as free surface by BET, iodine number, thermal analysis and SEM) show that. The activated carbon produced by chemical activation is more stable than other methods.In the case of activated carbon from citrus wood, the Iodine number of chemically activated carbon is observed chemically activation has significant difference compared to other methods of activation. With increasing amounts of chemical activation agent from 50 to 100%, the iodine number and surface area will increase, but increasing of this parameter from 100% to 150% has no significant effect on that properties. The maximum iodine number and BET for activated citrus wood with 150% ZnCl2 have resulted relatively 980.97 and 1050.22. The comparison of activated carbon from olive wood relative to other woods shows that olive carbon active has better characterization in all methods of activation. It also can be seen the thermal resistance of olive activated carbon is more than other woods.
Language:
Persian
Published:
Iranian Journal of Chemistry & Chemical Engineering, Volume:36 Issue: 1, 2017
Pages:
177 to 192
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