The use of ultrasound to enhance the regeneration of zeolite 13X for efficient utilization of thermal energy was investigated as a substitute to conventional heating methods. The effects of ultrasonic power and frequency on the desorption of water from zeolite 13X were analyzed to optimize the desorption efficiency. To determine and justify the effectiveness of incorporating ultrasound from an energy-savings point of view, an approach of constant overall input power of 20 or 25 W was adopted. To measure the extent of the effectiveness of using ultrasound, the ultrasonic-power-to-total power ratios of 0.2, 0.25, 0.4 and 0.5 were investigated and the results compared with those of no-ultrasound (heat only) at the same total power. To analyze the effect of ultrasonic frequency, identical experiments were performed at three nominal ultrasonic frequencies of ~28, 40 and 80 kHz. The experimental results showed that using ultrasound enhances the regeneration of zeolite 13X at all the aforementioned power ratios and frequencies without increasing the total input power. With regard to energy consumption, the highest energy-savings power ratio (0.25) resulted in a 24% reduction in required input energy and with an increase in ultrasonic power, i.e. an increase in acoustic-to-total power ratio, the effectiveness of applying ultrasound decreased drastically. At a power ratio of 0.2, the time required for regeneration was reduced by 23.8% compared to the heat-only process under the same experimental conditions. In terms of ultrasonic frequency, lower frequencies resulted in higher efficiency and energy savings, and it was concluded that the effect of ultrasonic radiation becomes more significant at lower ultrasonic frequencies. The observed inverse proportionality between the frequency and ultrasound-assisted desorption enhancement suggests that acoustic dissipation is not a significant mechanism to enhance mass transfer, but rather other mechanisms must be considered.

中文翻译：

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超声波辅助的沸石/水吸附对的再生。

研究了使用超声来增强13X沸石的再生以有效利用热能，以替代常规加热方法的问题。分析了超声功率和频率对13X沸石水脱附的影响，以优化脱附效率。为了从节能的角度确定并证明掺入超声波的有效性，采用了恒定总输入功率为20或25 W的方法。为了衡量使用超声波的有效性程度，研究了超声功率与总功率之比为0.2、0.25、0.4和0.5，并将结果与​​在相同总功率下无超声（仅加热）的功率进行了比较。为了分析超声波频率的影响，在〜28、40和80 kHz的三个标称超声频率下进行了相同的实验。实验结果表明，使用超声波可以在所有上述功率比和频率下增强13X沸石的再生，而不会增加总输入功率。在能源消耗方面，最高的节能功率比（0.25）导致所需输入能量减少了24％，并且超声功率增加，即声/总功率比增加，应用的有效性超声急剧下降。在相同的实验条件下，功率比为0.2时，与纯热过程相比，再生所需的时间减少了23.8％。在超声波频率方面，较低的频率可以提高效率和节省能源，得出的结论是，在较低的超声频率下，超声辐射的影响变得更加明显。观察到的频率与超声辅助解吸增强之间的反比例关系表明，消声不是增强质量传递的重要机制，而必须考虑其他机制。