EAGER:Nitrogen Selective Membrane for Carbon Capture

1049535 Wilcox该提案探讨了开发用于二氧化碳碳捕获的氮气选择性膜的可能性，这是一个对国家利益具有巨大范围和价值的问题。与其试图分离缺乏浓缩驱动力的二氧化碳，不如将重点放在一种选择性氮气(N2)技术上，该技术利用了烟气中氮气的驱动力。这项技术需要一种催化致密的膜，在膜中，氮气在表面上解离，然后以原子N的形式在膜中扩散。实验表明，钒(V)、铌(Nb)和钽(Ta)等V族金属在非常高的温度下，在钯(Pd)中以与原子氢(H)相似的速度扩散原子N，类似于燃煤电厂锅炉后的条件。特别是催化量的Ru可能是加速膜表面氮气分子解离所必需的。如果上述分离被证明是可行的，更长期的研究将涉及在膜的渗透侧耦合氢气吹扫，以尝试在常压下将解离的N原子转化为氨。解离步骤对NH3的产生是明显的速率限制，通过膜扩散的物种是原子。我希望PI在这个热切的提议的范围内至少尝试一个实验，以展示NH3代的概念证明。这个项目将对将致力于它的学生产生巨大的吸引力。有机会参与这样一个新颖而又易于理解的项目，在全球二氧化碳管理中具有如此潜在的价值，这是相当有吸引力的。

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.