Modeling of waveguide dual-mode bandpass filters over wide frequency range

Li, Shuqi; Wang, Ying; Yu, Ming

doi:10.1109/mwsym.2015.7167023

Cited by 2 publications

(2 citation statements)

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“…The reasons for these results are as follows: A longer microwave radiation duration meant that more electromagnetic energy would be dissipated by the microwave, and according to the law of the conservation of energy, more thermal energy is converted by the medium, resulting in an increase in the emulsion temperature . On the one hand, an increase in temperature accelerated the Brownian motion of liquid droplets, which facilitated their flocculation, aggregation, and coalescence.…”

Section: Resultsmentioning

confidence: 99%

“…On the one hand, an increase in temperature accelerated the Brownian motion of liquid droplets, which facilitated their flocculation, aggregation, and coalescence. On the other hand, the solubility of the interfacial active material in the water or oil phase was improved with increasing temperature, subsequently reducing the adsorptive capacity of the O/W interface and leading the interfacial film to become thinner . The thermal motion of the magnetic polymer macromolecules was intense, and the flocculation is strengthened.…”

Section: Resultsmentioning

confidence: 99%

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Using a New Fe₃O₄@CPAM Magnetic Flocculant and Microwave to Demulsify Heavy Oil-in-Water Emulsions

Sun,

et al. 2024

ACS Omega

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In this study, cationic polyacrylamide (CPAM)-coated magnetic nanoparticles (MNPs) Fe 3 O 4 @CPAM were synthesized for treating heavy O/W emulsions. This Fe 3 O 4 @CPAM was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and vibrating sample magnetometry (VSM) techniques, and its synergistic performances with microwaves were evaluated in detail with respect to the microwave radiation power, radiation time, and magnetic nanoparticle concentration. On this basis, the distribution of oil droplets and the wettability and chargeability of magnetic nanoparticles were measured without or with microwave radiation using biomicroscopy, contact angle measurement instrument, and a ζ-potential analyzer, thus revealing the synergistic demulsification mechanism between microwave and magnetic nanoparticles. The results showed that excessively high or low microwave radiation parameters had an inhibitory effect on the magnetic nanoparticle demulsification, and microwave promoted the magnetic nanoparticle demulsification only when the radiation parameters were in the optimal range. In addition, the water separation rate showed an increasing and then decreasing trend with the increase of magnetic nanoparticles concentration, with or without microwave action. As an example, the water separation rate of the emulsion for 1 h was 21.34% when the Fe 3 O 4 concentration was 175 mg/L without microwave action, while it increased to 55.56% with microwave action. In contrast, when the concentration of Fe 3 O 4 @CPAM was 175 mg/L, the water separation rate was 42.86% without microwave radiation, while it was further increased to 77.38% under microwave radiation. These results indicate that magnetic nanoparticles and their complexes significantly affect the water separation process under different conditions. There is a more obvious coupling synergistic effect between Fe 3 O 4 @CPAM and microwave. This was due to the lower absolute potential of Fe 3 O 4 @CPAM and its higher hydrophobicity.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Using a New Fe₃O₄@CPAM Magnetic Flocculant and Microwave to Demulsify Heavy Oil-in-Water Emulsions

Sun,

et al. 2024

ACS Omega

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Efficient Modeling of Ku-Band High Power Dielectric Resonator Filter With Applications of Neural Networks

Wang

et al. 2019

IEEE Trans. Microwave Theory Techn.

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Modeling of waveguide dual-mode bandpass filters over wide frequency range

Cited by 2 publications

References 8 publications

Using a New Fe₃O₄@CPAM Magnetic Flocculant and Microwave to Demulsify Heavy Oil-in-Water Emulsions

Using a New Fe₃O₄@CPAM Magnetic Flocculant and Microwave to Demulsify Heavy Oil-in-Water Emulsions

Efficient Modeling of Ku-Band High Power Dielectric Resonator Filter With Applications of Neural Networks

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Modeling of waveguide dual-mode bandpass filters over wide frequency range

Cited by 2 publications

References 8 publications

Using a New Fe3O4@CPAM Magnetic Flocculant and Microwave to Demulsify Heavy Oil-in-Water Emulsions

Using a New Fe3O4@CPAM Magnetic Flocculant and Microwave to Demulsify Heavy Oil-in-Water Emulsions

Efficient Modeling of Ku-Band High Power Dielectric Resonator Filter With Applications of Neural Networks

Contact Info

Product

Resources

About

Using a New Fe₃O₄@CPAM Magnetic Flocculant and Microwave to Demulsify Heavy Oil-in-Water Emulsions

Using a New Fe₃O₄@CPAM Magnetic Flocculant and Microwave to Demulsify Heavy Oil-in-Water Emulsions