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ROMBALDO, CARLA F.S.; LISBOA, ANTONIO C.L.; MENDEZ, MANOEL O.A.  and  COUTINHO, APARECIDO R.. Brazilian natural fiber (jute) as raw material for activated carbon production. An. Acad. Bras. Ciênc. [online]. 2014, vol.86, n.4, pp.2137-2144. ISSN 0001-3765.

Jute fiber is the second most common natural cellulose fiber worldwide, especially in recent years, due to its excellent physical, chemical and structural properties. The objective of this paper was to investigate: the thermal degradation of in natura jute fiber, and the production and characterization of the generated activated carbon. The production consisted of carbonization of the jute fiber and activation with steam. During the activation step the amorphous carbon produced in the initial carbonization step reacted with oxidizing gas, forming new pores and opening closed pores, which enhanced the adsorptive capacity of the activated carbon. N2 gas adsorption at 77K was used in order to evaluate the effect of the carbonization and activation steps. The results of the adsorption indicate the possibility of producing a porous material with a combination of microporous and mesoporous structure, depending on the parameters used in the processes, with resulting specific surface area around 470 m2.g–1. The thermal analysis indicates that above 600°C there is no significant mass loss.

Keywords : activation; adsorption; carbonization; jute fiber; thermogravimetry.

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