原位浇筑稻壳灰于金属有机骨架中诱导增强 CO2 捕获性能。
In situ casting of rice husk ash in metal organic frameworks induces enhanced CO capture performance.
机构信息
Discipline of Mechanical Engineering, Indian Institute of Technology Indore, Simrol, Indore, Madhya Pradesh, 453552, India.
Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, Madhya Pradesh, 453552, India.
出版信息
Sci Rep. 2020 Nov 19;10(1):20219. doi: 10.1038/s41598-020-77213-9.
Incorporation of rice-husk-ash (RHA), an agricultural waste, in situ during the synthesis of MIL-101(Cr) resulted in a significant improvement in the CO adsorption properties over the synthesized RHA-MIL-101(Cr). The newly synthesized RHA-MIL-101(Cr) composite exhibited an enhancement of 14-27% in CO adsorption capacity as compared to MIL-101(Cr) at 25 °C and 1 bar. The content of RHA incorporated in RHA-MIL-101(Cr) fine tuned the CO capture performance to achieve high working capacity (0.54 mmol g), high purity (78%), superior CO/N selectivity (18) and low isosteric heat of adsorption (20-30 kJ mol). The observed superior CO adsorption performance of RHA-MIL-101(Cr) is attributed to the fine tuning of textural characteristics-enhancement of 12-27% in BET surface area, 12-33% in total pore volume and 18-30% in micropore volume-upon incorporation of RHA in MIL-101(Cr).
稻壳灰（RHA）是一种农业废弃物，在原位合成 MIL-101(Cr) 的过程中加入 RHA，可显著提高合成的 RHA-MIL-101(Cr) 的 CO 吸附性能。与 MIL-101(Cr) 相比，新合成的 RHA-MIL-101(Cr) 复合材料在 25°C 和 1 巴条件下的 CO 吸附容量提高了 14-27%。RHA-MIL-101(Cr) 中 RHA 的含量可对 CO 捕获性能进行微调，以实现高工作容量（0.54mmol g）、高纯度（78%）、高 CO/N 选择性（18）和低等吸附热（20-30kJ mol）。RHA-MIL-101(Cr) 观察到的优异 CO 吸附性能归因于其对 MIL-101(Cr) 的结构特征进行了精细调控，可提高比表面积（增加 12-27%）、总孔体积（增加 12-33%）和微孔体积（增加 18-30%）。
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