Intensified carbon capture using adsorption: Heat transfer challenges and potential solutions
Intensified carbon capture using adsorption: Heat transfer challenges and potential solutions
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DOI：
10.1016/j.tsep.2018.07.012
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发表时间：
2018-12-01
影响因子：
4.8
通讯作者：
Zivkovic, Vladimir
中科院分区：
文献类型：
--
作者：
McDonough, Jonathan R.;Law, Richard;Zivkovic, Vladimir
在欧盟（EU）导致全球变暖的二氧化碳排放总量中，高达25%来自工业，虽然提高能源效率和工艺集成继续在最大限度地减少这些排放方面发挥作用，但在核能和可再生能源技术取代化石燃料之前，碳捕获（CC）将在未来对减缓气候变化做出最大贡献。几种CC方法之一是使用气固吸附，其中CO2被吸附到固体上。与更常见的吸收方法一样，需要再生，并且通常使用单个床来吸附CO2，而CO2的再生和去除发生在第二床中-通过变压吸附（PSA）或变温吸附（TSA）进行。在EPSRC资助的项目中，与赫瑞瓦特大学（正在合成水滑石吸附剂）和谢菲尔德大学（正在进行建模）合作，纽卡斯尔大学正在研究使用基于TSA的工艺（包括旋流或环形流化床）强化CC。除了改进吸附外，据信回收的废热可用于使用类似强化技术的解吸。本文讨论了正在解决的二氧化碳的潜在来源，以及它们将如何与捕获和解吸过程，其中流化将用于吸附过程。它还描述了使用增材制造的微型流化床对颗粒进行流化的初步工作。
Up to 25% of the total European Union (EU) CO2 emissions that contribute to global warming are from industry, and while improved energy efficiency and process integration continues to play a role in minimizing these, it is carbon capture (CC) that in future will contribute most to mitigation, until nuclear energy and renewable technologies take over from fossil fuels. One of several CC methods is to use gas-solid adsorption, where the CO2 is adsorbed onto a solid. As with the more common absorption process, regeneration is required, and typically a single bed is employed to adsorb CO2 while regeneration and removal of the CO2 takes place in the second bed - carried out by pressure swing adsorption (PSA) or temperature swing adsorption (TSA). Collaborating in an EPSRC-funded project with Heriot-Watt University, where hydrotalcite-based adsorbents are being synthesised, and Sheffield University, where modelling is being undertaken, Newcastle University is examining the intensification of CC using a TSA-based process involving swirling or toroidal fluidized beds. As well as improving adsorption, it is believed that recovered waste heat could be used for desorption using a similar intensified technology. This paper discusses the potential sources of CO2 that are being addressed, and how they will be integrated with the capture and desorption processes where fluidization will be used for the adsorption process. It also describes preliminary work on fluidization of the particles using additive-manufactured miniaturized fluid beds.