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Highly Efficient NO Decomposition via Dual-Functional Catalytic Perovskite Hollow Fiber Membrane Reactor Coupled with Partial Oxidation of Methane at Medium-Low Temperature
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2019-08-08 , DOI: 10.1021/acs.est.9b02530
Zhigang Wang 1 , Ziwei Li 2 , Yifan Cui 1 , Tianjia Chen 1 , Jiawei Hu 1 , Sibudjing Kawi 1
Affiliation  

A novel dual-functional catalytic perovskite hollow fiber membrane reactor was fabricated by integrating BaBi0.05Co0.8Nb0.15O3-δ (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 N2 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 N2 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.

中文翻译:

双功能催化钙钛矿型中空纤维膜反应器结合甲烷在中低温下的高效氧化分解

通过将BaBi 0.05 Co 0.8 Nb 0.15 O3 (BBCN)钙钛矿中空纤维膜与Ni-页硅酸盐中空球催化剂集成在一起,制得新型的双功能催化钙钛矿中空纤维膜反应器,以同时进行NO分解和甲烷的部分氧化(POM) ) 反应。使用这种新型的催化膜反应器,NO可以完全转化为N 2由于从NO分解反应系统中瞬时去除了氧气,因此温度处于中低温(675°C)。BBCN中空纤维膜另一侧的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)。这种新型的膜反应器在相对较低的温度(675–700°C)下显示出较高的NO去除能力,比文献报道的其他膜反应器低100–200°C。此外,即使NO流中存在2%至5%的氧气浓度,NO仍然可以完全分解为N 2通过该催化BBCN膜反应器。显然,该新型催化膜反应器的应用可以克服对存在的氧气进行NO分解的抑制作用,并实现非常高的NO去除效率。
更新日期:2019-08-08
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