Integrated CO2 Capture and Utilization Using Non-Thermal Plasmolysis
Integrated CO2 Capture and Utilization Using Non-Thermal Plasmolysis
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DOI：
10.3389/fenrg.2017.00020
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发表时间：
2017-08
影响因子：
3.4
通讯作者：
Matthew Moss;D. Reed;R. Allen;P. Styring
中科院分区：
文献类型：
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作者：
Matthew Moss;D. Reed;R. Allen;P. Styring
在所提出的工作中，2个简单的二氧化碳（CO2）捕获和利用的过程已经结合起来，形成一个完整的系统方法，碳捕获和利用（CCU）。第一阶段采用变压吸附（PSA）系统，该系统提供了许多优于当前胺技术的优点。结果发现，高选择性可以实现快速的吸附/脱附时间，同时采用廉价，耐用的吸附剂，表现出没有吸附剂损失，并很容易通过简单的压降再生。PSA系统能够捕获并将废气流的CO2浓度从12.5%提升到更高纯度的范围。由于许多CCU终端工艺对进料中的杂质（例如氮气（N2）的形式）具有一定的耐受性，这对于该PSA系统是非常有利的，因为仅用几个步骤和最小的能量输入就可以实现超过80%的CO2纯度。非热等离子体是一种这样的技术，其可以容忍进料中的小N2杂质，甚至从中受益，因此不需要100%纯的CO2流。该过程的第二阶段部署了纳秒脉冲电晕放电反应器，将捕获的CO2分解为一氧化碳（CO），然后可以用作其他合成的化学原料。电晕放电已被证明可用于气体清洁的工业应用，脉冲功率的优势可降低系统的能耗。圆柱体中的线几何形状将处理的气体体积集中到高电场区域中。先前的工作表明，与其他非热等离子体方法相比，可以实现中等转化率（9%），但具有更高的能量效率（>60%）。
In the presented work, 2 simple processes for carbon dioxide (CO2) capture and utilisation have been combined to form a whole systems approach to carbon capture and utilisation (CCU). The first stage utilises a pressure swing adsorption (PSA) system, which offers many benefits over current amine technologies. It was found that high selectivity can be achieved with rapid adsorption/desorption times whilst employing a cheap, durable sorbent that exhibits no sorbent losses and is easily regenerated by simple pressure drops. The PSA system is capable capturing and upgrading the CO2 concentration of a waste gas stream from 12.5% to a range of higher purities. As many CCU end processes have some tolerance towards impurities in the feed, in the form of nitrogen (N¬2) for example, this is highly advantageous for this PSA system since CO2 purities in excess of 80% can be achieved with only a few steps and minimal energy input. Non-thermal plasma is one such technology that can tolerate, and even benefit from, small N2 impurities in the feed, therefore a 100% pure CO2 stream is not required. The second stage of this process deploys a nanosecond pulsed corona discharge reactor to split the captured CO2 into carbon monoxide (CO), which can then be used as a chemical feedstock for other syntheses. Corona discharge has proven industrial applications for gas cleaning and the benefit of pulsed power reduces the energy consumption of the system. The wire-in-cylinder geometry concentrates the volume of gas treated into the area of high electric field. Previous work has suggested that moderate conversions can be achieved (9%), compared to other non-thermal plasma methods, but with higher energy efficiencies (>60%).