Blend Cellulose Acetate Butyrate Membrane with Molecular Weight 12,000, 30,000 and 65,000 for CO2/N2 Separation

IF 1.2 Q3 MULTIDISCIPLINARY SCIENCES
Wong Shei Ming, Z. Jawad, Arwa Sulaiman, C. Leng
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引用次数: 0

Abstract

The demand for energy has been increasing gradually due to the rapid growth of the global economy. The emission of greenhouses gases (GHGs) especially, carbon dioxide (CO2), which is a major greenhouse gas, has contributed to the global warming issue. Therefore, to reduce emissions and eliminate the serious consequences, membrane separation technology was introduced as an alternative option that has high CO2 separation efficiency. It requires lower energy consumption, lower capital costs and it is commercial and environmentally friendly. Most importantly, it is easy to operate. In this study, the blend cellulose acetate butyrate (CAB) membrane was synthesised from the CAB polymers using the wet-phase inversion method with molecular weights of 12,000:30,000:65,000 in the ratio of 1:2:2, respectively. The blend CAB membrane casted at 250 μm (M2) was the best performing membrane among all the membranes due to its relatively high CO2 gas permeance and the highest CO2/N2 selectivity, which were 7,560.80 ± 20 GPU and 1.5319 ± 0.05, respectively. The fabricated CAB membrane was then characterised by using the Attenuated Total Reflectance Fourier-Transform Infrared Spectroscopy (ATR-FTIR) and surface contact angle. It showed strong stretching bands around 1,044.07 cm−1, 1,226.25 cm−1 and 1,744.04 cm−1, which indicated a single bond C-O and carboxyl group (C=O). The higher the hydrophobicity of the membrane, the stronger the affinity for CO2 molecules. In this case, the contact angle of the membrane casted at 150 μm (M1) was 120.460, which was the highest. This newly synthesised CAB membrane is expected to benefit major industries by its cost effective and high energy saving properties. Most importantly, the gas separation efficiencies are better than the current technologies.
分子量分别为 12,000、30,000 和 65,000 的混合醋酸纤维素丁酸酯膜,用于分离 CO2/N2
随着全球经济的快速增长,对能源的需求也逐渐增加。温室气体(GHGs)的排放,尤其是作为主要温室气体的二氧化碳(CO2)的排放,导致了全球变暖问题。因此,为了减少排放和消除严重后果,膜分离技术作为一种二氧化碳分离效率高的替代选择被引入。它所需的能耗较低,资本成本也较低,是一种商业和环境友好型技术。最重要的是,它易于操作。在这项研究中,采用湿相反转法,以分子量分别为 12,000:30,000:65,000 的 CAB 聚合物为原料,按 1:2:2 的比例合成了醋酸纤维素丁酸酯(CAB)混合膜。250 μm 的混合 CAB 膜(M2)是所有膜中性能最好的膜,因为它具有相对较高的 CO2 气体渗透率和最高的 CO2/N2 选择性,分别为 7560.80 ± 20 GPU 和 1.5319 ± 0.05。随后,利用衰减全反射傅立叶变换红外光谱(ATR-FTIR)和表面接触角对制备的 CAB 膜进行了表征。它在 1,044.07 cm-1、1,226.25 cm-1 和 1,744.04 cm-1 附近显示出强烈的伸展带,这表明存在单键 C-O 和羧基 (C=O)。膜的疏水性越高,对二氧化碳分子的亲和力就越强。在这种情况下,150 μm 处铸膜(M1)的接触角为 120.460,是最高的。这种新合成的 CAB 膜因其高性价比和高节能特性,有望造福于各大行业。最重要的是,它的气体分离效率优于现有技术。
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来源期刊
Journal of Physical Science
Journal of Physical Science Physics and Astronomy-Physics and Astronomy (all)
CiteScore
1.70
自引率
0.00%
发文量
19
期刊介绍: The aim of the journal is to disseminate latest scientific ideas and findings in the field of physical sciences among scientists in Malaysia and international regions. This journal is devoted to the publication of articles dealing with research works in Chemistry, Physics and Engineering. Review articles will also be considered. Manuscripts must be of scientific value and will be submitted to independent referees for review. Contributions must be written in English and must not have been published elsewhere.
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