Department of Chemical and Biomolecular Engineering , National University of Singapore , 117576 Singapore.
School of Chemical Engineering , Guizhou Institute of Technology , Guiyang 550003 , P. R. China.
Environ Sci Technol. 2019 Aug 20;53(16):9937-9946. doi: 10.1021/acs.est.9b02530. Epub 2019 Aug 8.
A novel dual-functional catalytic perovskite hollow fiber membrane reactor was fabricated by integrating BaBiCoNbO (BBCN) perovskite hollow fiber membrane with Ni-phyllosilicate hollow sphere catalysts for simultaneous NO decomposition and partial oxidation of methane (POM) reaction. With this novel catalytic membrane reactor, NO could be completely converted to N at a medium-low temperature (675 °C) owing to instantaneous oxygen removal from the NO decomposition reaction system. Coupled POM reaction on the other side of BBCN hollow fiber membrane not only increased the driving force for oxygen permeation but also produced valuable products (syngas). This novel membrane reactor showed high NO removal capacity at comparatively low temperatures (675-700 °C), which is 100-200 °C lower than those of other membrane reactors reported in literature. In addition, even with the presence of a 2-5% oxygen concentration in NO stream, NO could still be completely decomposed to N via this catalytic BBCN membrane reactor. Evidently, the application of this novel catalytic membrane reactor could overcome the inhibition of oxygen present atmosphere for NO decomposition and achieve a remarkably high efficiency for NO removal.
一种新型的双功能催化钙钛矿中空纤维膜反应器是通过将 BaBiCoNbO（BBCN）钙钛矿中空纤维膜与镍层状硅酸盐中空球催化剂集成而制备的，用于同时进行 NO 分解和部分氧化甲烷（POM）反应。在这种新型催化膜反应器中，由于从 NO 分解反应体系中即时去除氧气，NO 可以在中低温（675°C）下完全转化为 N。另一方面，在 BBCN 中空纤维膜的另一侧进行耦合的 POM 反应不仅增加了氧气渗透的驱动力，而且还产生了有价值的产物（合成气）。与文献中报道的其他膜反应器相比，这种新型膜反应器在较低的温度（675-700°C）下具有较高的 NO 去除能力，要低 100-200°C。此外，即使在 NO 流中存在 2-5%的氧气浓度，NO 也可以通过这种催化 BBCN 膜反应器完全分解为 N。显然，这种新型催化膜反应器的应用可以克服氧气存在气氛对 NO 分解的抑制作用，实现对 NO 去除的高效性。
