Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China; Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650500, China; School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, 553004, China.
School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, 553004, China.
Carbohydr Polym. 2020 Jan 1;227:115380. doi: 10.1016/j.carbpol.2019.115380. Epub 2019 Sep 25.
Old corrugated containers with low recyclability were used as raw materials to synthesize a series of aerogels with varying cellulose concentrations in NaOH/urea solution via a freeze-drying process. The resulting aerogels had a rich porous structure with specific surface areas in the range of 132.72-245.19 m.g and mesopore volumes in the range of 0.73-1.53 cm.g, and were tested for CO sorption at ambient temperature and pressure, displaying excellent CO adsorption capacities in the range of 1.96-11.78 mmol.g. Furthermore, the CO/N selectivity of aerogels decreased with decreasing specific surface area, which was mainly caused by the decrease in CO capture. In addition, the CO sorption capacity of the sample with 2% cellulose content, CA-2, exceeded the values reported so far for many other sorbents with higher specific surface areas, and showed reasonable cyclic stability for CO capture. Therefore, this adsorbent represents an attractive prospect for CO uptake at room temperature.
旧的波纹状容器可回收性低，被用作原材料，通过冷冻干燥工艺在 NaOH/尿素溶液中合成了一系列具有不同纤维素浓度的气凝胶。所得气凝胶具有丰富的多孔结构，比表面积在 132.72-245.19 m.g 之间，中孔体积在 0.73-1.53 cm.g 之间，并在环境温度和压力下测试了 CO 吸附性能，在 1.96-11.78 mmol.g 范围内显示出优异的 CO 吸附能力。此外，气凝胶的 CO/N 选择性随比表面积的降低而降低，这主要是由于 CO 捕获的减少。此外，纤维素含量为 2%的样品（CA-2）的 CO 吸附能力超过了迄今为止许多具有更高比表面积的其他吸附剂的报道值，并且对 CO 捕获表现出合理的循环稳定性。因此，这种吸附剂在室温下吸收 CO 具有很大的吸引力。
