Abstract With the rapid growth of economics, carbon dioxide (CO2) gases are being emitted in bulk into the atmosphere contributing to the current global warming issues. Thus, membrane separation technology was implemented due to its notable benefits of simple operation, cost savings, and high efficiency in CO2 separation. In this study, the cellulose acetate butyrate (CAB) membrane was synthesized from CAB polymers of molecular weights (Mn) 12,000 and 65,000, while the effects of casting thickness and solvent evaporation time during membrane fabrication were studied. The optimal casting thickness and solvent evaporation time were obtained at 250 µm and 5 min respectively, whereas the CO2 permeance and CO2/N2 selectivity were obtained at 106.87 ± 1.03 GPU and 6.948 ± 0.081, respectively. Eventually, this newly developed CAB membrane is expected to benefit the industrial sectors by reducing the CO2 emissions with improved efficiencies in gas separation.

中文翻译：

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醋酸丁酸纤维素膜结构对CO2/N2分离的影响：浇铸厚度和溶剂交换时间的影响

摘要 随着经济的快速增长，二氧化碳 (CO2) 气体大量排放到大气中，导致当前的全球变暖问题。因此，膜分离技术因其操作简单、节约成本、CO2分离效率高等显着优点而得以实施。在这项研究中，醋酸丁酸纤维素 (CAB) 膜由分子量 (Mn) 12,000 和 65,000 的 CAB 聚合物合成，同时研究了膜制造过程中浇注厚度和溶剂蒸发时间的影响。最佳浇注厚度和溶剂蒸发时间分别为 250 µm 和 5 分钟，而 CO2 渗透率和 CO2/N2 选择性分别为 106.87 ± 1.03 GPU 和 6.948 ± 0.081。最终，