Chemical Engineering and Processing - Process Intensification最新文献

The potential of integrating solar-powered membrane distillation with a humidification–dehumidification system to recover potable water from textile wastewater 将太阳能膜蒸馏与加湿-除湿系统结合起来从纺织废水中回收饮用水的潜力

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.110036

{"title":"The potential of integrating solar-powered membrane distillation with a humidification–dehumidification system to recover potable water from textile wastewater","authors":"","doi":"10.1016/j.cep.2024.110036","DOIUrl":"10.1016/j.cep.2024.110036","url":null,"abstract":"<div><div>Textile production is energy- and water-intensive, and membrane distillation (MD) has shown potential for reclaiming potable water from textile wastewater. However, in the current state, the energy and water recovery potential of MD is lower compared to other conventional distillation technologies. To address these issues, this study proposes and assesses a novel solar-powered hybrid Sweeping Gas MD (SGMD) unit integrated with a humidification dehumidification (HDH) system. Real textile wastewater from bleaching and dyeing processes is treated in the hybrid SGMD-HDH system to recover freshwater. An optical-thermal sub-model for the parabolic trough collector and the heat and mass transfer model for the dehumidifier are developed and validated using experimental measurements. The results reveal that the hybrid SGMD-HDH can exhibit nearly 20 % higher water flux and 50 % higher gain output ratio (GOR) compared to the standalone MD system. The highest water production and average GOR for bleaching wastewater feed solution reached 11.72 kg/day and 0.64, respectively. The higher concentration of chemical contaminants in dyeing wastewater decreased water flux and GOR by up to 14 % and 10 %, respectively, compared to bleaching wastewater. Elemental analysis showed increased carbon concentrations on the polytetrafluoroethylene membrane surface arising from organic fouling.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comprehensive investigation of gas hold-up in a double coaxial mixer with shear-thinning fluids exhibiting yield stress: Experimental, numerical, and artificial neural network approaches 全面研究具有屈服应力的剪切稀化流体在双同轴混合器中的气体滞留：实验、数值和人工神经网络方法

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.110049

{"title":"Comprehensive investigation of gas hold-up in a double coaxial mixer with shear-thinning fluids exhibiting yield stress: Experimental, numerical, and artificial neural network approaches","authors":"","doi":"10.1016/j.cep.2024.110049","DOIUrl":"10.1016/j.cep.2024.110049","url":null,"abstract":"<div><div>This study addresses the challenge of uneven gas dispersion in yield-stress, non-Newtonian fluids, commonly encountered in industries such as biopharmaceuticals, cosmetics, and food processing. While previous research demonstrated the advantages of dual coaxial mixers for pseudoplastic fluids, limited attention has been given to aerating yield-pseudoplastic fluids with higher aspect ratios. This study bridges that gap by investigating both local and global gas hold-up under various conditions, utilizing electrical resistance tomography and computational fluid dynamics. Key findings showed that increasing the anchor speed from stationary to 30 rpm significantly enhanced aeration efficiency (gas hold-up per specific power consumption), with improvements of 78 % in UP-CO mode and 25 % in UP-COUNTER mode at <em>N<sub>c</sub></em> = 350 rpm and <em>Q<sub>g</sub></em> = 20 L/min. These results underscore enhanced gas dispersion under specific operating conditions, driving overall process intensification. To ensure accurate prediction of gas hold-up, both dimensional and dimensionless empirical correlations, along with an artificial neural networks (ANNs) model, were developed. The ANNs model exhibited superior accuracy, achieving R² values of 0.99 for both rotation modes, outperforming empirical models, which achieved R² values of 0.90 and 0.89 for UP-CO and UP-COUNTER modes, respectively.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of antimicrobial properties of essential oils under rotating magnetic field 优化旋转磁场下精油的抗菌特性

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.110041

{"title":"Optimization of antimicrobial properties of essential oils under rotating magnetic field","authors":"","doi":"10.1016/j.cep.2024.110041","DOIUrl":"10.1016/j.cep.2024.110041","url":null,"abstract":"<div><div>Essential oils (EOs) extracted from <em>Thymus vulgaris</em> L. (TEO) and <em>Rosmarinus officinalis</em> L. (REO) have aroused interest in their application to food preservation or in alternative medicine or aroma-therapy. In this study, the chemical compositions of essential oils were determined and analyzed. The purpose of the investigation was to investigate in detail the activity of essential oils extracted from herbs (thyme and rosemary) and exposed to rotating magnetic filed (RMF) against the model Gram-negative bacteria <em>Escherichia coli</em> The bacterial removal has been optimized by a surface response methodology (RSM). It was shown that TEO in a concentration of 10 µL/50 mL of water resulted in a total bacterial number reduction after 40 min under the RMF. Rosemary's antibacterial effect was much weaker. Thus, we summarized that the rotating magnetic fields at a frequency of 27 Hz can increase the antimicrobial efficiency but the effect depends on the type of essential oil. High-rate bacteria removal was obtain for thyme oil in concentration of 30 µL of thyme oil to 50 mL of bacterial suspension, exposed to RMF at a frequency of 27 Hz for 40–60 min.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cell/particle manipulation using Bulk Acoustic Waves (BAWs) on centrifugal microfluidic platforms: A mathematical study 在离心微流体平台上使用体声波 (BAW) 操纵细胞/粒子：数学研究

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.110024

{"title":"Cell/particle manipulation using Bulk Acoustic Waves (BAWs) on centrifugal microfluidic platforms: A mathematical study","authors":"","doi":"10.1016/j.cep.2024.110024","DOIUrl":"10.1016/j.cep.2024.110024","url":null,"abstract":"<div><div>This study presents an integrated acoustic-aided centrifugal microfluidic system to focus and separate microparticles. A 3D numerical simulation was conducted to analyze microparticle movement by exploiting the simultaneous imposition of centrifugal forces and bulk acoustic waves (BAWs) on an electrified lab-on-a-disc device (eLOD). Accordingly, the movement of microparticles was analyzed in a radially positioned rectangular microchannel at various rotation speeds. The effect of physical parameters, including the distance of the microchannel to the center/radius, tilting angle (<em>α</em>), the oscillation amplitude of BAWs, the microchannel's dimension, and the particles’ diameter on particle trajectories and focusing efficiency, was studied. It was found that properly adjusting the microchannel's placement at <em>α</em> = 30° made it possible to direct the focused stream of microparticles toward the desired outlet. Higher values of applied oscillation amplitude of BAWs (0.3 nm) led to perfect focusing of microparticles toward the middle outlet in a 200-µm width microchannel at 80 rad/s rotation. Furthermore, the system's ability to separate the circulating tumor cells (CTC) from white blood cells (WBC) was also simulated. The results showed that a successful size-based separation of these bioparticles is achievable by adequately adjusting the microchannel's position or tilting angle at 286 rpm.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical and experimental investigation of Tesla micromixers with different three-dimensional herringbone structures 具有不同三维人字形结构的特斯拉微搅拌器的数值和实验研究

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.110040

引用次数: 0

Parametric design of curved hydrocyclone using data points and its separation enhancement mechanism 使用数据点的曲面水力旋流器参数化设计及其分离强化机制

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.110043

引用次数: 0

Investigation of gas-liquid mass transfer in slurry systems driven by the coaxial mixer 同轴搅拌器驱动泥浆系统中的气液传质研究

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.110039

{"title":"Investigation of gas-liquid mass transfer in slurry systems driven by the coaxial mixer","authors":"","doi":"10.1016/j.cep.2024.110039","DOIUrl":"10.1016/j.cep.2024.110039","url":null,"abstract":"<div><div>The coaxial mixer was applied to the gas-liquid mass transfer process in slurry systems containing up to 8 vol% solids. The effects of impeller type, impeller speed, solid content, and gas flow rate were examined, and a correlation for the volumetric mass transfer coefficient was established. The findings indicate that at identical impeller speeds, the combination of an anchor and Rushton turbine exhibited the highest volumetric mass transfer coefficient and gas hold-up among coaxial mixers. However, when the pitched blade turbine with a down-pumping direction was utilized as the inner impeller, the coaxial mixer demonstrated superior performance under the same power consumption conditions. Additionally, the lower anchor speed was found to improve gas-liquid mass transfer, whereas a higher speed would lead to poor dispersion of gas phase, thereby deteriorating the performance of coaxial mixers. Increasing solid content caused a continuous decline in both the volumetric mass transfer coefficient and gas hold-up, while a rise in gas flow rate had the positive effect. Finally, the correlation developed for the volumetric mass transfer coefficient in slurry systems showed a deviation of less than 20% between predicted and measured values.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142560719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Supercritical carbon dioxide as solvent for manufacturing of ibuprofen loaded gelatine sponges with enhanced performance 以超临界二氧化碳为溶剂生产性能更佳的布洛芬明胶海绵

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.110038

引用次数: 0

Influence of inlet velocity on the separation performance of a combined hydrocyclone 入口速度对组合式水力旋流器分离性能的影响

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-10-21 DOI: 10.1016/j.cep.2024.110034

引用次数: 0

Ultrasound-assisted extraction vs. microwave-assisted extraction for sustainable development goals: Selecting the ideal lipid extraction and fatty acid profile 实现可持续发展目标的超声辅助提取与微波辅助提取：选择理想的脂质提取和脂肪酸谱

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-10-20 DOI: 10.1016/j.cep.2024.110035

{"title":"Ultrasound-assisted extraction vs. microwave-assisted extraction for sustainable development goals: Selecting the ideal lipid extraction and fatty acid profile","authors":"","doi":"10.1016/j.cep.2024.110035","DOIUrl":"10.1016/j.cep.2024.110035","url":null,"abstract":"<div><div>The objective of this study was to compare the efficiency of ultrasound-assisted extraction (UAE) and microwave-assisted extraction (MAE) methods for extracting lipids from the green microalga <em>Chlorococcum novae-angliae</em>. This study specifically focused on the fatty acid profiles of the extracted lipids, using ethanol as the solvent and wet biomass as the starting material. Ultrasound-assisted extraction yielded a maximum of 0.026 ± 0.001 g lipid/g wet biomass at a biomass ratio of 1:25 for 2 min with a 1-second cycle at 180 W and 20 kHz, which was 21% higher than that of microwave-assisted extraction conducted at a ratio of 1:30 for 2 min at 300 W and 35 °C. Ultrasound-assisted extraction enhanced saturated fatty acids (SFAs), which were 1.5 times higher than to microwave-assisted extraction, while microwave-assisted extraction significantly increased polyunsaturated fatty acids (PUFAs) by 4.4 times. The findings suggest that ultrasound-assisted extraction is more suitable for applications requiring high SFA content, such as in the fuel industry, whereas microwave-assisted extraction is preferable for sectors focused on fatty acid quality, such as food and health. This comparative analysis contributes to the literature by highlighting the impact of extraction methods on fatty acid profiles and supports sustainable development goals (SDGs), particularly SDG 12, by promoting environmentally friendly extraction techniques.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0