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玉米秸秆生物炭掺杂Pebax 1657混合基质膜分离CO2性能
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Abstract:
随着人类社会发展，CO2的过量排放造成了温室效应的加剧。我国作为农业大国，秸秆产量巨大但资源化利用水平不高。本文以玉米秸秆为原材料制备了生物炭，掺入Pebax 1657中制成混合基质膜(MMMs)用于CO2分离纯化和玉米秸秆高价值利用。结果表明，与纯Pebax 1657膜相比，生物炭填料的掺入提升了MMMs的性能，且随着掺杂比的提升气体分离性能呈现上升趋势。在掺杂比为4 wt%时性能最佳。玉米秸秆生物炭最佳CO2渗透系数和选择性分别为125.7 Barrer和81.78，相比纯Pebax 1657膜提升了69%和34%。生物炭掺杂Pebax 1657混合基质膜具有良好的分离CO2性能。
With the development of human society, the excessive emission of CO2 has exacerbated the greenhouse effect. As a large agricultural country, straw production of China is huge, but its resource utilization level remains low. In this study, biochar was prepared from corn stalk, and then dopped into Pebax 1657 to produce mixed matrix membranes (MMMs), the obtained MMMs was used for CO2 separation from gas mixture. The results show that, compared to pure Pebax 1657 membranes, the doping of biochar enhanced the CO2 separation performance of MMMs. Additionally, the CO2 separation performance increased with elevating the doping rate, the best performance was achieved at a doping ratio of 4 wt%. The optimal CO2 permeability and selectivity of MMMs were 125.7 Barrer and 81.78, respectively, which separately improved 69% and 34% compared to pure Pebax 1657 membranes. Biochar-doped Pebax 1657 mixed matrix membranes exhibit excellent CO2 separation performance.
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