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溶剂吸收-膜解吸联合工艺是一种新型具有较低能耗的燃烧前CO_2捕集方法,高通量和高分离因子的解吸膜制备成为此技术的关键。以醋酸纤维素超滤膜为基膜,在聚二甲基硅氧烷(PDMS)中加入不同交联剂进行改性,制备了从CO_2-碳酸二甲酯(DMC)混合液中解吸分离CO_2的非对称渗透汽化膜。研究表明可以从溶解活性、扩散活熊、反应活性提高膜的解吸性能,并研究了不同改性交联剂、膜层厚度、交联温度、解吸液浓度和解吸温度等因素对膜解吸CO_2性能的影响。与文献相比,优化制备所得的PDMS-APTES(3-氨基丙基三乙氧基硅烷)—PTES(苯基三乙氧基硅烷)复合膜具有较大的通量(4970 g×m~(-2)×h~(-1))和分离因子(79.3),具有一定潜在工业应用价值。
The solvent absorption-membrane desorption combined process is a new type of pre-combustion CO 2 capture method with lower energy consumption. The desorption membrane with high throughput and high separation factor is the key to this technology. Using cellulose acetate ultrafiltration membrane as the basement membrane, different cross-linking agents were added to polydimethylsiloxane (PDMS) for modification, and CO_2-dimethyl carbonate (DMC) Asymmetric pervaporation membrane. The results show that the desorption performance of the membrane can be improved by dissolving activity and living bears, and the activity of the membrane can be improved. The effects of different modified crosslinkers, film thickness, crosslinking temperature, desorption solution concentration and desorption temperature on the performance of membrane desorption influences. Compared with the literature, the optimized PDMS-APTES (3-aminopropyltriethoxysilane) -PTES (phenyltriethoxysilane) composite membrane has a large flux (4970 g × m ~ -2) × h ~ (-1)) and separation factor (79.3), which have certain potential industrial application value.