Ultrasound was applied to a microreactor for CO desorption from 30 wt% aqueous amine solutions. The ultrasonic transducer was attached directly to the microchannel in order to achieve the greatest ultrasound irradiation by the solution. The behavior of two-phase flow was assessed by a digital microscope camera, illustrating the formation of gas bubbles and its growing through the microchannel reactor. Effects of MEA concentration, solution flow rate, temperature, and ultrasonic wave’s power on the desorption rate and desorption percentage was evaluated. Desorption percentage showed a direct relationship with temperature, ultrasound power, and concentration of MEA solution but an inverse relationship with the flow rate. In addition to performing the regeneration process at lower temperatures than required by traditional procedures which can reduce solvent damage, 50 % energy saving was obtained using the designed contactor. In the next step, aqueous blended AMP/MEA solutions with two different ratios were assessed. For a 20 wt% AMP + 10 wt% MEA solution at 0.25 mL/min, an energy saving of about 62 % was achieved as compared to the conventional method's benchmark of 30 wt% MEA.

中文翻译：

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用于 MEA 和 MEA/AMP 溶液再生的低能耗声微反应器

将超声波应用于微反应器，以从 30 wt% 的胺水溶液中解吸 CO。超声换能器直接连接到微通道，以实现溶液最大的超声辐射。通过数码显微镜相机评估两相流的行为，说明气泡的形成及其在微通道反应器中的生长。评价了MEA浓度、溶液流速、温度和超声波功率对解吸速率和解吸百分比的影响。解吸百分比与温度、超声功率和 MEA 溶液浓度呈正相关，但与流速呈反比关系。除了在比传统程序所需的温度更低的温度下进行再生过程（可以减少溶剂损坏）之外，使用设计的接触器还可以节省 50% 的能源。在下一步中，评估了两种不同比例的 AMP/MEA 混合水溶液。对于 0.25 mL/min 的 20 wt% AMP + 10 wt% MEA 溶液，与传统方法的 30 wt% MEA 基准相比，节能约 62%。