EAGER:Nitrogen Selective Membrane for Carbon Capture

1049535 Wilcox该提案探讨了开发用于CO2碳捕获的氮选择性膜的可能性，这是一个对国家利益具有巨大范围和价值的问题。重点不是试图分离缺乏浓缩驱动力的CO2，而是利用烟道气流中N2的驱动力的选择性氮气（N2）技术。该技术需要催化致密膜，其中N2在表面上解离，然后作为原子N扩散通过膜。V族金属如钒（V）、铌（Nb）和钽（Ta）已经在实验上显示出在非常高的温度下，类似于燃煤发电厂的锅炉后条件，以与钯（Pd）中的原子氢（H）类似的速率扩散原子N。如果上述分离被证明是可行的，则长期研究将涉及在膜的渗透侧上耦合H2吹扫以试图在大气压下将解离的N原子转化为氨。解离步骤显然是NH3产生的速率限制，并且通过膜扩散的物质是原子。我希望PI在这个EAGER项目的范围内至少尝试一个实验，以证明NH3生成的概念验证。这个项目对将要参与的学生有很大的吸引力。有机会参与这样一个新颖，但易于理解的项目，在全球CO2管理中具有如此潜在的价值，是非常有吸引力的。

1049535 WilcoxThis proposal explores the possibility of developing a Nitrogen-Selective Membrane for CO2 Carbon Capture, which is a problem of immense scope and value to national interests. Instead of trying to separate CO2, which lacks the driving force of concentration, the focus is on a selective-nitrogen (N2) technology that takes advantage of the driving force of N2 in the flue gas stream. This technology requires a catalytic dense membrane in which N2 dissociates across the surface and then diffuses through the membrane as atomic N. Group V metals such as vanadium (V), niobium (Nb), and tantalum (Ta) have experimentally been shown to diffuse atomic N at similar rates to atomic hydrogen (H) in palladium (Pd), at very high temperatures, similar to those of the post-boiler conditions of a coal-fired power plant. Catalytic amounts of ruthenium in particular may be necessary to speed the dissociation of the N2 molecule at the membrane surface.If the above separation were to prove feasible, the longer term studies would involve coupling a H2 purge on the permeate side of the membrane to attempt to convert the dissociated N atoms into ammonia at atmospheric pressure. The dissociation step is apparently rate limiting for NH3 production, and the species that is diffusing through the membrane is the atom. I would like the PI to try at least one experiment in the confines of this EAGER proposal to show proof-of-concept for NH3 generation.This project will have great appeal to the student who will work on it. The opportunity to work on such a novel, yet easy to understand project, with such potential value in the global management of CO2 is quite attractive.