我国是农业大国,作为农业生产中的副产物,秸秆年产量巨大,提高秸秆的高值化利用将有利于农业生产的可持续发展。本研究以小麦秸秆为原材料制备了秸秆生物炭,使用小麦秸秆生物炭和Pebax 1657制备了混合基质膜,研究了该混合基质膜分离CO2...我国是农业大国,作为农业生产中的副产物,秸秆年产量巨大,提高秸秆的高值化利用将有利于农业生产的可持续发展。本研究以小麦秸秆为原材料制备了秸秆生物炭,使用小麦秸秆生物炭和Pebax 1657制备了混合基质膜,研究了该混合基质膜分离CO2的性能。研究表明,小麦秸秆生物炭具有高比表面积、丰富的微孔结构以及较为丰富的官能团。Pebax 1657中掺杂4 wt%小麦秸秆生物炭所制备的混合基质膜具有最佳的CO2分离性能,CO2分离渗透系数和选择性分别为106.5 Barrer和74.8,相比未掺杂前的纯Pebax 1657膜分别提升了34.0%和18.0%。China is an agricultural country, and straw, as a by-product of agricultural production, has a substantial annual output. Enhancing the high-value utilization of straw will contribute to the sustainable development of agricultural production. In this study, wheat straw biochar was prepared from wheat straw, and a mixed matrix membrane was prepared with wheat straw biochar and Pebax 1657. The performance of mixed matrix membranes for separating CO2 was investigated. The results indicated that wheat straw biochar has high specific surface area, rich microporous structure, and abundant functional groups. The mixed matrix membrane prepared with 4 wt% wheat straw biochar doped in Pebax 1657 exhibited the best CO2 separation performance. The CO2 separation permeation coefficient and selectivity were 106.5 Barrer and 74.8, respectively, which were 34.0% and 18.0% higher than the pure Pebax 1657 membrane before doping, respectively.展开更多
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...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.展开更多
文摘我国是农业大国,作为农业生产中的副产物,秸秆年产量巨大,提高秸秆的高值化利用将有利于农业生产的可持续发展。本研究以小麦秸秆为原材料制备了秸秆生物炭,使用小麦秸秆生物炭和Pebax 1657制备了混合基质膜,研究了该混合基质膜分离CO2的性能。研究表明,小麦秸秆生物炭具有高比表面积、丰富的微孔结构以及较为丰富的官能团。Pebax 1657中掺杂4 wt%小麦秸秆生物炭所制备的混合基质膜具有最佳的CO2分离性能,CO2分离渗透系数和选择性分别为106.5 Barrer和74.8,相比未掺杂前的纯Pebax 1657膜分别提升了34.0%和18.0%。China is an agricultural country, and straw, as a by-product of agricultural production, has a substantial annual output. Enhancing the high-value utilization of straw will contribute to the sustainable development of agricultural production. In this study, wheat straw biochar was prepared from wheat straw, and a mixed matrix membrane was prepared with wheat straw biochar and Pebax 1657. The performance of mixed matrix membranes for separating CO2 was investigated. The results indicated that wheat straw biochar has high specific surface area, rich microporous structure, and abundant functional groups. The mixed matrix membrane prepared with 4 wt% wheat straw biochar doped in Pebax 1657 exhibited the best CO2 separation performance. The CO2 separation permeation coefficient and selectivity were 106.5 Barrer and 74.8, respectively, which were 34.0% and 18.0% higher than the pure Pebax 1657 membrane before doping, respectively.
文摘随着人类社会发展,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.
