Tailoring biomass-based activated carbon for CH4 storage by combining chemical activation with H3PO4 or ZnCl2 and physical activation with CO2
Tailoring biomass-based activated carbon for CH4 storage by combining chemical activation with H3PO4 or ZnCl2 and physical activation with CO2
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DOI：
10.1016/j.carbon.2016.08.092
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发表时间：
2016-12-01
期刊：
影响因子：
10.9
通讯作者：
Rodriguez-Reinoso, Francisco
中科院分区：
文献类型：
--
作者：
Prauchner, Marcos J.;Sapag, Karim;Rodriguez-Reinoso, Francisco
采用H3 PO 4或ZnCl 2化学活化和CO2物理活化的方法制备了用于甲烷储存的椰壳基活性炭。努力的重点是建立之间的关系的激活程序，所得到的材料和体积的CH 4吸收的质地和物理化学性质。最好的结果是通过使用一个相对软的化学活化与H3 PO 4或ZnCl 2的组合，刚好足以最大限度地减少存在的大孔起源于植物结构的前体，然后通过物理活化与CO2开发一个狭窄的孔径分布主要位于周围的最佳孔径/宽度的CH 4存储。这种结合的方法允许获得过量的体积甲烷吸附容量高达94，148和145 V/V的颗粒状，粉末状/压缩和单片碳，分别。相应的甲烷总储存容量估计为102、165和163 V/V。值得强调的是，前体是一种低成本和丰富的农业副产品，对于大规模应用，如气体运输和车辆燃料箱中的气体储存非常重要。(C)2016爱思唯尔有限公司版权所有
Coconut shell-based activated carbons intended for CH4 storage were prepared by chemical activation with H3PO4 or ZnCl2 and/or physical activation with CO2. Efforts were focused to establish relationships among the activation procedure, the textural and physical-chemical properties of the resulting materials and their volumetric CH4 uptake. The best results were achieved by using the combination of a relatively soft chemical activation with H3PO4 or ZnCl2, just the sufficient to minimize the presence of macropores originated from the botanical structure of the precursor, followed by physical activation with CO2 to develop a narrow pore size distribution mainly located around the optimum pore diameter/width for CH4 storage. This combined methodology permitted to obtain excess volumetric CH4 adsorption capacities as high as 94, 148 and 145 V/V for granular, powdered/compressed and monolithic carbons, respectively. The corresponding total CH4 storing capacities were estimated to be 102,165 and 163 V/V. It is worthy to highlight that the precursor was a low cost and abundant agricultural by-product, which is very important for large-scale applications such as gas transportation and gas storage in vehicular fuel tanks. (C) 2016 Elsevier Ltd. All rights reserved.