Highly Selective CO2 Capture on Waste Polyurethane Foam-Based Activated Carbon
Highly Selective CO2 Capture on Waste Polyurethane Foam-Based Activated Carbon
复制标题
废聚氨酯泡沫基活性炭的高选择性二氧化碳捕集
DOI：
10.3390/pr7090592
复制
发表时间：
2019-09-01
期刊：
影响因子：
3.5
通讯作者：
Lu, Jianjun
中科院分区：
文献类型：
--
作者：
Ge, Chao;Lian, Dandan;Lu, Jianjun
以废旧聚氨酯泡沫塑料为原料，首次采用二氧化碳物理活化和氢氧化钙、氢氧化钠或氢氧化钾化学活化的方法制备了低成本的活性碳。对活化条件进行了优化，制得了具有高CO2吸附容量和CO2/N-2选择性的微孔炭。物理活化法制备的样品对CO2/N-2的选择性高达24，远高于化学活化法。这主要是由于物理活化过程中产生的较窄的微孔率和丰富的N含量所致。然而，与化学活化样品相比，物理活化样品表现出较差的织构特性，导致在273K时的CO2吸收率较低，为3.37mmol.g(-1)。通过化学活化获得的多孔炭在273K时的CO2吸收率为5.85mmol.g(-1)，与其他废物制备的最佳活性炭材料相当。这主要归因于大量的超微孔(
Low-cost activated carbons were prepared from waste polyurethane foam by physical activation with CO2 for the first time and chemical activation with Ca(OH)(2), NaOH, or KOH. The activation conditions were optimized to produce microporous carbons with high CO2 adsorption capacity and CO2/N-2 selectivity. The sample prepared by physical activation showed CO2/N-2 selectivity of up to 24, much higher than that of chemical activation. This is mainly due to the narrower microporosity and the rich N content produced during the physical activation process. However, physical activation samples showed inferior textural properties compared to chemical activation samples and led to a lower CO2 uptake of 3.37 mmol.g(-1) at 273 K. Porous carbons obtained by chemical activation showed a high CO2 uptake of 5.85 mmol.g(-1) at 273 K, comparable to the optimum activated carbon materials prepared from other wastes. This is mainly attributed to large volumes of ultra-micropores (