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Intensification of TSA processes using a microwave-assisted regeneration step
Chemical Engineering and Processing: Process Intensification ( IF 4.3 ) Pub Date : 2020-12-25 , DOI: 10.1016/j.cep.2020.108291
Eugenio Meloni , Marco Martino , Pluton Pullumbi , Federico Brandani , Vincenzo Palma

The energy consumption in the temperature swing adsorption (TSA) process is essentially due to the heating of the purge gas used in the regeneration of the adsorbent bed. The use of microwave (MW) irradiation, replacing the traditional heating technique, can result in process acceleration and energy costs reduction: the electromagnetic energy is directly converted into thermal energy inside the adsorbent bed, all the resistances to the heat transfer are overcome, and the heat flow becomes the opposite of the conventional one. In this work, the innovative MW-assisted regeneration of zeolites bed is investigated. A dedicated laboratory plant was set up, and the optimal operating conditions were studied and determined. The results highlighted (i) the heating of the zeolites up to 300°C, (ii) an energy efficiency of 75 % (due to a more uniform heat transfer to the adsorbent) and (iii) the consecutive tests showed a perfect repeatability of the results in terms of CO2 adsorption and desorption, so evidencing that no modification occurred in zeolites after MW irradiation. In addition, both the adsorption and desorption steps were modelled through a simulation tool specifically realized in Air Liquide, and the results showed a good agreement between the predicted and experimental values.



中文翻译:

使用微波辅助再生步骤强化TSA工艺

变温吸附(TSA)过程中的能量消耗主要是由于加热了吸附床再生中使用的吹扫气体。微波(MW)辐射的使用代替了传统的加热技术,可以加快工艺流程并降低能源成本:电磁能直接转化为吸附床内部的热能,克服了对传热的所有阻力,并且热流与常规流相反。在这项工作中,研究了新颖的MW辅助的沸石床再生。建立了专门的实验室工厂,并研究和确定了最佳操作条件。结果强调(i)将沸石加热至300°C,2吸附和解吸,因此证明在MW照射后沸石没有发生改性。另外,吸附和解吸步骤均通过液化空气中专门实现的模拟工具进行建模,结果表明预测值与实验值之间具有良好的一致性。

更新日期:2020-12-28
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