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| 品牌 |
ABB |
型号 |
5751017-AABBDSTC 452 |
| 类型 |
DCS |
性能 |
即插即用 |
| 适用范围 |
工业 |
加工定制 |
否 |
| 是否进口 |
是 |
|
他说,为了从空气中分离氧气和氮气,这两个分子的大小仅相差约 0.18 埃(十亿分之一米)。要制造能够有效分离它们的过滤器“在不降低吞吐量的情况下很难做到”。但他说,新的梯形聚合物在制成膜时会产生微小的孔,从而实现高选择性。在某些情况下,每个氮都会渗透 10 个氧分子,尽管需要使用极薄的筛子来获得这种类型的尺寸选择性。这些新的膜材料“在许多应用中具有所有已知聚合物材料的渗透性和选择性组合,”Smith 说。
“由于 CANAL 聚合物坚固且具有延展性,而且它们可溶于某些溶剂,因此它们可以在几年内扩大规模以用于工业部署,”他补充道。由本研究的作者领导的一家名为 Osmoses 的 MIT 衍生公司最近赢得了MIT 10 万美元的创业竞赛,并获得了The Engine的部分资金,用于将该技术商业化。
说,这些材料在化学加工行业有多种潜在应用,包括将二氧化碳与其他气体混合物分离,以减少排放。另一种可能性是纯化由农业废弃物制成的沼气燃料,以提供无碳运输燃料。用于生产燃料或化学原料的氢分离也可以有效地进行,有助于向以氢为基础的经济过渡。
紧密结合的研究人员团队正在继续改进该过程,以促进从实验室到工业规模的发展,并更好地了解大分子结构和包装如何产生超高选择性的细节。说,他预计该平台技术将在多种脱碳途径中发挥作用,首先是氢分离和碳捕获,因为迫切需要这些技术以过渡到无碳经济。
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For the separation of oxygen and nitrogen from air, the two molecules only differ in size by about 0.18 angstroms (ten-billionths of a meter), he says. To make a filter capable of separating them efficiently “is incredibly difficult to do without decreasing throughput.” But the new ladder polymers, when manufactured into membranes produce tiny pores that achieve high selectivity, he says. In some cases, 10 oxygen molecules permeate for every nitrogen, despite the razor-thin sieve needed to access this type of size selectivity. These new membrane materials have “the highest combination of permeability and selectivity of all known polymeric materials for many applications,” Smith says.
“Because CANAL polymers are strong and ductile, and because they are soluble in certain solvents, they could be scaled for industrial deployment within a few years,” he adds. An MIT spinoff company called Osmoses, led by authors of this study, recently won the MIT $100K entrepreneurship competition and has been partly funded by The Engine to commercialize the technology.
There are a variety of potential applications for these materials in the chemical processing industry, Smith says, including the separation of carbon dioxide from other gas mixtures as a form of emissions reduction. Another possibility is the purification of biogas fuel made from agricultural waste products in order to provide carbon-free transportation fuel. Hydrogen separation for producing a fuel or a chemical feedstock, could also be carried out efficiently, helping with the transition to a hydrogen-based economy.
The close-knit team of researchers is continuing to refine the process to facilitate the development from laboratory to industrial scale, and to better understand the details on how the macromolecular structures and packing result in the ultrahigh selectivity. Smith says he expects this platform technology to play a role in multiple decarbonization pathways, starting with hydrogen separation and carbon capture, because there is such a pressing need for these technologies in order to transition to a carbon-free economy.