Analysis of the Regeneration of Monoethanolamine Aqueous Solutions by Microwave Irradiation
Analysis of the Regeneration of Monoethanolamine Aqueous Solutions by Microwave Irradiation
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DOI：
10.1016/j.egypro.2017.12.259
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发表时间：
2017-12
期刊：
影响因子：
--
通讯作者：
F. Bougie;Xianfeng Fan
中科院分区：
文献类型：
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作者：
F. Bougie;Xianfeng Fan
尽管在过去的几十年中发表了大量关于胺水溶液捕集CO2过程的研究，但迄今为止在文献中仅发现一篇关于使用微波（MW）再生废溶液的论文。然后进行本工作以通过MW研究MEA水溶液的再生效率，同时测试各种胺浓度，包括公知的30重量%。汽提CO2的量进行了比较，MW的能量吸收的解决方案，以找到最佳的再生条件。通过MW的溶液的加热速率被发现是由它们的热容量和粘度，两个参数具有相反的效果，产生了最大的加热速率的浓度为50-60重量%的MEA的影响。通过进行吸收和再生循环，发现每种溶液的循环CO2容量，并将其与汽提步骤期间溶液吸收的MW能量的量进行比较。对于50wt%MEA溶液发现每摩尔汽提CO2的最低能量比，该比比对于基准30wt%MEA发现的值低33%。
Even if numerous studies were published over the last decades about the CO2capture process by aqueous amine solutions, only one paper was found so far in the literature concerning the use of microwave (MW) to regenerate the spent solutions. The present work was then performed to investigate the regeneration efficiency of MEA aqueous solutions by MW while testing various amine concentrations including the well-known 30 wt%. Stripped CO2quantities were compared to the MW energy absorbed by the solution to find the optimal regeneration conditions. The heating rate of solutions by MW was found to be influenced by their heat capacity and viscosity, two parameters with opposing effects giving rise to a maximal heating rate for concentrations of 50-60 wt% MEA. By performing absorption and regeneration cycles, the cyclic CO2capacity of each solution was found and compared to the amount of MW energy absorbed by the solution during the stripping step. The lowest energy per mole of stripped CO2ratio was found for the 50 wt% MEA solution which ratio is 33 % lower than the value found for the benchmark 30 wt% MEA.