Jiang Qiwei, Guo Meng
Wuxi Ginkgo Plastic Industry Co., Ltd., Heqiao Town, Yixing, Wuxi 214216, China.
Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.
Membranes (Basel). 2022 Apr 27;12(5):470. doi: 10.3390/membranes12050470.
The membrane separation process for targeted CO capture application has attracted much attention due to the significant advantages of saving energy and reducing consumption. High-performance separation membranes are a key factor in the membrane separation system. In the present study, we conducted a detailed examination of the effect of calcination temperatures on the network structures of organosilica membranes. Bis(triethoxysilyl)acetylene (BTESA) was selected as a precursor for membrane fabrication via the sol-gel strategy. Calcination temperatures affected the silanol density and the membrane pore size, which was evidenced by the characterization of FT-IR, TG, N sorption, and molecular size dependent gas permeance. BTESA membrane fabricated at 500 °C showed a loose structure attributed to the decomposed acetylene bridges and featured an ultrahigh CO permeance around 15,531 GPU, but low CO/N selectivity of 3.8. BTESA membrane calcined at 100 °C exhibited satisfactory CO permeance of 3434 GPU and the CO/N selectivity of 22, displaying great potential for practical CO capture application.
用于靶向 CO 捕集应用的膜分离过程因其节能和降低消耗的显著优势而备受关注。高性能分离膜是膜分离系统的关键因素。在本研究中，我们详细考察了煅烧温度对有机硅膜网络结构的影响。选择双（三乙氧基硅基）乙炔（BTESA）作为通过溶胶 - 凝胶策略制备膜的前驱体。煅烧温度影响硅醇密度和膜孔径，这通过傅里叶变换红外光谱（FT-IR）、热重分析（TG）、氮吸附和分子尺寸依赖性气体渗透率表征得到证明。在 500 °C 制备的 BTESA 膜由于乙炔桥分解而呈现出疏松结构，其 CO 渗透率超高，约为 15531 GPU，但 CO/N 选择性较低，为 3.8。在 100 °C 煅烧的 BTESA 膜表现出令人满意的 3434 GPU 的 CO 渗透率和 22 的 CO/N 选择性，在实际 CO 捕集应用中显示出巨大潜力。
