CO2稳定的双相混合导体透氧膜材料的研究进展  

Status of CO2-stable dual-phase mixed conductor oxygen permeable membrane materials

作　　者：王舒 石磊 谢沚昂 王好奇 蓝琪 何缘 严冬 张杏 罗惠霞 Shu Wang;Lei Shi;Zhiang Xie;Haoqi Wang;Qi Lan;Yuan He;Dong Yan;Xing Zhang;Huixia Luo(School of Materials Science and Engineering,Sun Yat-sen University,Guangzhou 510275,China;Key Laboratory of Polymer Composites and Functional Materials,Ministry of Education,Sun Yat-Sen University,Guangzhou 510275,China)

机构地区：[1]中山大学材料科学与工程学院,广州510275 [2]中山大学聚合物复合材料及功能材料教育部重点实验室,广州510275

出　　处：《科学通报》2019年第16期1651-1670,共20页Chinese Science Bulletin

基　　金：国家自然科学基金(21701197)资助

摘　　要：混合导体透氧膜在高温条件下(特别是温度高于700℃)是一种同时具有氧离子和电子混合传导性能的无机致密陶瓷膜.由于此类膜材料在中高温条件下不仅可以清洁、高效、经济地从空气或者其他含氧气氛中高选择性地分离氧气,同时还具有一定的催化活性,所以这类氧离子和电子混合传导膜在纯氧制备、燃料电池、甲烷部分氧化制合成气、富氧燃烧等方面有着巨大的应用潜力,相关研究也成为材料及化工等领域研究学者关注的焦点.为了找到既具有高透氧性能又具有优异稳定性能的透氧膜材料,研究人员做了大量的工作和努力.本文对近年来CO2稳定的双相混合导体透氧膜材料的研究进展进行系统的综述,简单介绍了双相混合导体透氧膜的透氧机理,分析了双相透氧膜材料的制备方法、几何形状、烧结温度以及组成成分等对透氧性能及稳定性的影响,介绍了双相混合导体透氧膜膜反应器在甲烷部分氧化制备合成气、耦合反应、水分解及富氧燃烧中的应用.最后分析了目前存在的科学问题,并对CO2稳定的双相混合导体透氧膜材料未来的发展进行了展望.Dense ceramic mixed ionic-electronic conducting membranes(MIECMs) are renowned for their rich and varied properties as admirable candidates in energy industries, such as oxygen separation from air, cathode materials for solid fuel oxide cells(SOFCs) or membrane reactors for partial oxidation of light hydrocarbons. Especially, the MIECMs integrated oxy-fuel combustion is considered to be a promising cost-effective and efficient method for CO2 capture and sequestration. During the oxy-fuel process, high purity oxygen production has been put forward to use OTMs technology instead of the conventional cryogenic technique, which can benefit from low costs and energy consumption and high efficiency. According to the phase numbers, the OTMs can be classified into single phase and composite OTMs. Extensive research activities have been directed towards the single phase perovskite-type oxides due to their high oxygen permeability. However, their industrial practical application was limited since they suffer from deactivation in the presence of CO2 due to alkaline earth carbonates forming on their surfaces. In order to overcome these issues, focus has shifted to the development of dual-phase membranes consisting of an oxygen ion conducting phase and an electron ion conducting phase, which benefit from the contribution of each phase and overcome the limitations of perovskite materials. Dual-phase OTM typically composed of an oxygen conducting phase(OCP) and an electronic conducting phase(ECP), which displays a better structural and mechanical stability comparing with the single phase OTM under reducing atmosphere due to the incorporation of fluorite phase. The first generation dual-phase OTMs are usually made from the fluorite oxides and noble metals, where fluorite oxides are used as the OCP and noble metals are adopted as the ECP. However, the noble metal-containing dual-phase OTM is too expensive. In order to lower the costs, researchers have developd the second generation dual-phase OTMs, which are consisted of fluorite

关 键 词：双相混合导体透氧膜 富氧燃烧 气体分离 抗二氧化碳 膜反应器 

分 类 号：TQ051.893[化学工程] X701[环境科学与工程—环境工程]