{"title":"Construction of ternary heterostructure of zeolite/Fe3O4/CuS/CuWO4 as a reusable: Characterization studies","authors":"Alyaa Hussein Ali, Abeer I. Alwared","doi":"10.1002/apj.3125","DOIUrl":"10.1002/apj.3125","url":null,"abstract":"<p>The presence of pharmaceutical pollutants in the environment has become a growing concern due to their persistence and toxic nature. In response to this issue, semiconductor photocatalyst materials have emerged as promising candidates for environmental pollutant removal, particularly under solar light irradiation. In this study, we developed a novel zeolite/Fe<sub>3</sub>O<sub>4</sub>/CuS/CuWO<sub>4</sub> heterojunction nanocomposite through a simple and facile method. The fabrication process involved a multistep approach wherein Fe<sub>3</sub>O<sub>4</sub>, CuS, and CuWO<sub>4</sub> were incorporated onto the surface of pure zeolite nanoparticles. X-ray diffraction, scanning electron microscope, transmission electron microscope, ultraviolet–visible diffuse reflectance spectroscopy, Fourier transform infrared, photoluminescence, and vibrating sample magnetometry were analyzed. The results demonstrated that the zeolite/Fe<sub>3</sub>O<sub>4</sub>/CuS/CuWO<sub>4</sub> heterojunction nanocomposite exhibited a synergistic integration of excellent properties, indicative of the successful construction of a heterostructure within the nanocomposite. Furthermore, the photocatalytic efficiency of the nanocomposite was evaluated for the degradation of the pharmaceutical pollutant fluoroquinolone levofloxacin (LEVO), and it outperformed individual photocatalysts. Notably, the zeolite/Fe<sub>3</sub>O<sub>4/</sub>CuS/CuWO<sub>4</sub> nanocomposite achieved an impressive degradation rate of approximately 82.67% of LEVO after 120 min of exposure. Importantly, the synthesized nanocomposite demonstrated excellent reusability, with a photodegradation efficiency of 60.45% after the fifth cycle of LEVO degradation, as there was no significant loss in photocatalytic activity over repeated cycles. Furthermore the highest total organic carbon removal efficiency estimated is 57.43% for heterojunction nanocomposite. These findings highlight the potential of the zeolite/Fe<sub>3</sub>O<sub>4</sub>/CuS/CuWO<sub>4</sub> heterojunction nanocomposite as an effective, eco-friendly photocatalyst for pharmaceutical pollutant removal from the environment.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"19 5","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141786206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kadhim Al-Chlaihawi, Bahjat Hassan Alyas, Banan Najim Abdullah
{"title":"Optimizing of heat transfer and flow characteristics within a roughened solar air heater duct with compound turbulators","authors":"Kadhim Al-Chlaihawi, Bahjat Hassan Alyas, Banan Najim Abdullah","doi":"10.1002/apj.3126","DOIUrl":"10.1002/apj.3126","url":null,"abstract":"<p>Thermal systems for solar air heating have been widely used in both industrial and residential contexts, and are essential for converting and recovering solar energy. Thermal performance in solar air heaters (SAHs) can be improved through the repetitive application of artificial roughness to the surfaces. This research work includes a numerical evaluation of SAH performance with artificial rough surfaces made up of combined transverse trapezoidal ribs and chamfered grooves. The ANSYS Fluent software version 2023 R1 was used to simulate SAH with varying relative roughness pitch (\u0000<span></span><math>\u0000 <mi>P</mi>\u0000 <mo>/</mo>\u0000 <mi>e</mi>\u0000 <mo>=</mo>\u0000 <mn>7.14</mn>\u0000 <mo>−</mo>\u0000 <mn>35.71</mn></math>), relative roughness heights (\u0000<span></span><math>\u0000 <mi>e</mi>\u0000 <mo>/</mo>\u0000 <msub>\u0000 <mi>D</mi>\u0000 <mi>h</mi>\u0000 </msub>\u0000 <mo>=</mo>\u0000 <mn>.021</mn>\u0000 <mo>−</mo>\u0000 <mn>.042</mn></math>), and Reynolds number (\u0000<span></span><math>\u0000 <mi>Re</mi>\u0000 <mo>=</mo>\u0000 <mn>6000</mn>\u0000 <mo>−</mo>\u0000 <mn>18</mn>\u0000 <mspace></mspace>\u0000 <mn>000</mn></math>). The RNG \u0000<span></span><math>\u0000 <mi>k</mi>\u0000 <mo>−</mo>\u0000 <mi>ϵ</mi></math> model was chosen to forecast an enhancement in Nusselt number (\u0000<span></span><math>\u0000 <mi>Nu</mi></math>), friction factor (\u0000<span></span><math>\u0000 <mi>f</mi></math>), and thermohydraulic performance factor (TPF) for the proposed roughness. Out of multiple roughness parameters analyzed, it was determined that the compound turbulator with \u0000<span></span><math>\u0000 <mi>P</mi>\u0000 <mo>/</mo>\u0000 <mi>e</mi>\u0000 <mo>=</mo>\u0000 <mn>10.71</mn></math> and \u0000<span></span><math>\u0000 <mi>e</mi>\u0000 <mo>/</mo>\u0000 <msub>\u0000 <mi>D</mi>\u0000 <mi>h</mi>\u0000 </msub>\u0000 <mo>=</mo>\u0000 <mn>.042</mn></math>, were the most effective. The TPF for this scenario was determined to be 2.12 at \u0000<span></span><math>\u0000 <mi>Re</mi>\u0000 <mo>=</mo>\u0000 <mn>6000</mn></math>. Finally, a numerical based empirical correlations for \u0000<span></span><math>\u0000 <mi>Nu</mi></math> and \u0000<span></span><math>\u0000 <mi>f</mi></math> in terms of Re, \u0000<span></span><math>\u0000 <mi>P</mi>\u0000 <mo>/</mo>\u0000 <mi>e</mi></math>, and \u0000<span></span><math>\u0000 <mi>e</mi>\u0000 <mo>/</mo>\u0000 <msub>\u0000 <mi>D</mi>\u0000 <mi>h</mi>\u0000 </msub></math> were developed.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"19 5","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141777542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Numerical simulation on the pressure, turbulence, and \u0000\u0000 \u0000 λ\u0000 2\u0000 vortex characteristics within the annular symmetric jet process under different vacuum degrees","authors":"Xinjie Chai, Yuxi Hu, Lishan Gao, Facheng Qiu, Zhiliang Cheng","doi":"10.1002/apj.3127","DOIUrl":"10.1002/apj.3127","url":null,"abstract":"<p>The jet impingement flash technology represents a paramount research subject in the domain of heat and mass transfer. To augment its commercial potential, the conjunction of annular multi-aperture jet impingement with negative pressure flash evaporation is introduced in this study. The employment of an annular nozzle array is integral to the enhancement of the heat and mass transfer efficiency between the phases. The Realizable k-ε model is used in this study. The negative pressure flash vaporization model was also developed by introducing a mass source term and an energy source term based on the Mixture model. The flow characteristics are characterized using numerical simulation. Additionally, the λ<sub>2</sub> vortex identification criterion is investigated the vortex structure. The simulation results exhibit good agreement with experimental findings, demonstrating that a higher initial vacuum leads to a stronger flashing effect and a more chaotic movement of the flow group within the flow field. Thus, this study provides a reference method for the structural design and optimization of annular symmetric jet impingement negative pressure deammonia chemical equipment for engineering applications.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"19 5","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141777544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}