Química Nova | |
Preparation and characterization of chemically activated carbon from rice hulls | |
Emmerich, Francisco G.1  Soares, Ana B.1  Cunha, Alfredo G.1  Universidade Federal do Espírito Santo, Vitória, Brasil1  Silva, Paulo R. N.1  Schettino Jr., Miguel A.1  Freitas, Jair C. C.1  Universidade Estadual do Norte Fluminense, Campos dos Goytagazes, Brasil1  | |
关键词: activated carbons; rice hulls; chemical activation.; | |
DOI : 10.1590/S0100-40422007000700031 | |
学科分类:化学(综合) | |
来源: Sociedade Brasileira de Quimica | |
【 摘 要 】
This work consists in a study about the chemical activation of charred rice hulls using NaOH as the activation agent. The influence of the naturally-occurring silica was particularly evidenced. X-ray diffraction patterns showed the formation of sodium carbonate and silicates in the activated samples, whereas thermogravimetric curves revealed a strong reduction in the ash content of these samples after washing with water. Nitrogen adsorption data indicated a microporosity development only in the washed samples, with BET surface area values of 450 and 1380 m2/g achieved for the samples activated at 800 °C starting from the precursor with or without silica, respectively.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912050593948ZK.pdf | 379KB | download |