Characterization of activated carbons from oil-palm shell by CO2 activation with no holding carbonization temperature.
Characterization of activated carbons from oil-palm shell by CO2 activation with no holding carbonization temperature.
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DOI：
10.1155/2013/624865
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发表时间：
2013
影响因子：
--
通讯作者：
Putra A
中科院分区：
文献类型：
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作者：
Herawan SG;Hadi MS;Ayob MR;Putra A
活性炭可以由不同的前体，包括不同等级的煤和木质纤维素材料，通过物理或化学活化过程生产。本文的目的是表征油棕壳，作为棕榈油厂的生物质副产品，通过氮热解和二氧化碳活化转化为活性炭。研究了无保温峰热解温度对活性炭物理特性的影响。在500、600、700℃条件下，在77 K条件下进行N2吸附，考察了活性炭的BET比表面积。这些制备活性炭的热解条件在热解温度为700°C时比选定的商业活性炭产生更高的BET表面积。因此，活性炭导致孔隙发育良好，主要是微孔隙。采用这种活化方法，活性炭的表面特性得到了明显的改善。因此，本研究表明，在缩短制备时间的同时，可以得到较好的活性炭效果。
Activated carbons can be produced from different precursors, including coals of different ranks, and lignocellulosic materials, by physical or chemical activation processes. The objective of this paper is to characterize oil-palm shells, as a biomass byproduct from palm-oil mills which were converted into activated carbons by nitrogen pyrolysis followed by CO2 activation. The effects of no holding peak pyrolysis temperature on the physical characteristics of the activated carbons are studied. The BET surface area of the activated carbon is investigated using N2 adsorption at 77 K with selected temperatures of 500, 600, and 700°C. These pyrolysis conditions for preparing the activated carbons are found to yield higher BET surface area at a pyrolysis temperature of 700°C compared to selected commercial activated carbon. The activated carbons thus result in well-developed porosities and predominantly microporosities. By using this activation method, significant improvement can be obtained in the surface characteristics of the activated carbons. Thus this study shows that the preparation time can be shortened while better results of activated carbon can be produced.