Chemical Engineering and Processing - Process Intensification最新文献

{"title":"Enhanced photocatalytic degradation of methyl orange dye under UV light using Cu and Ni-doped CdS nanocomposites: Insights into reactor performance and kinetic analysis","authors":"Md. Rashid Al-Mamun ,&nbsp;Tasnim Hasan Fahim ,&nbsp;Md. Ikram Hossain ,&nbsp;Md. Shahinoor Islam ,&nbsp;Md. Romzan Ali ,&nbsp;Md. Sadek Bacchu ,&nbsp;Md. Abdul Khaleque ,&nbsp;Hiroki Waizumi ,&nbsp;Tadahiro Komeda ,&nbsp;Md. Zaved Hossain Khan","doi":"10.1016/j.cep.2025.110560","DOIUrl":"10.1016/j.cep.2025.110560","url":null,"abstract":"<div><div>The inefficient treated wastewater poses a significant environmental challenge, which drives intensive research toward the development of novel photocatalysts. While CdS photocatalysts have been widely studied, their limited stability and fast charge carrier recombination hinder photocatalytic performance. In this study, Cu and Ni-doped CdS nanocomposites were synthesized via a simple chemical precipitation route to improve photocatalytic efficiency under UV irradiation. The structural, morphological, and optical properties were characterized using XRD, SEM-EDX, FTIR, and XPS, confirming a hexagonal wurtzite structure (average crystalline size: 22.0–30.0 nm), spherical morphology with homogeneous elemental dispersion, O–H stretching bands, and the presence of new chemical states. Photocatalytic degradation of methyl orange dye (MO) (10 mg l^-1) showed efficiencies of 77.7 % (CdS), 81.3 % (CdS-Cu), 93.8 % (CdS-Ni), and 83.0 % (CdS-Cu-Ni) after 3.0 h of UV exposure. Notably, CdS-Ni achieved 100 % degradation upon the addition of 1.0 mL of H₂O₂. The reaction followed pseudo-second-order kinetics, with a reaction rate constant of 0.0079 min^-1, and the catalyst demonstrated good stability over multiple reuse cycles. The enhanced photocatalytic activity was primarily attributed to the narrowed bandgap, increased light-harvesting capability, and reduced electron-hole pair recombination. These outcomes demonstrate the potential of CdS-Ni nanocomposites as effective photocatalysts for the treatment of dye-contaminated wastewater.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"218 ","pages":"Article 110560"},"PeriodicalIF":3.9,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107276","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}

{"title":"Beyond dividing wall columns: Improved process intensification through liquid-only transfer and heat integration","authors":"Momme Adami ,&nbsp;Sina Bertram ,&nbsp;Dennis Espert ,&nbsp;Mirko Skiborowski","doi":"10.1016/j.cep.2025.110559","DOIUrl":"10.1016/j.cep.2025.110559","url":null,"abstract":"<div><div>Many chemical companies aim to achieve climate neutrality by 2050, requiring raw material changes and significant reductions in process energy. Since distillation accounts for a large share of energy use, it is a key target for process improvements. One promising approach is thermal coupling between columns, which is already industrially implemented, especially in dividing wall columns. However, such configurations often suffer from limited operational flexibility due to the fixed vapor split between parallel sections, which is largely fixed during design and difficult to adjust during operation. This limitation can be overcome by replacing each bidirectional vapor-and-liquid connection with a liquid-only transfer side stream. This concept allows each column to operate at an individual pressure and enables new options for heat integration. The present study introduces a structured approach for assessing and optimizing such systems with one or two liquid-only transfer side streams, particularly when combined with direct heat integration. Promising configurations are first identified through an efficient shortcut screening and can further be optimized using superstructure optimization. A case study on separating benzene, toluene, and para-xylene demonstrates that liquid-only transfer configurations with direct heat integration can significantly reduce energy and costs, and in many cases outperform conventional thermally coupled systems.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"218 ","pages":"Article 110559"},"PeriodicalIF":3.9,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155634","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}

{"title":"An inline quality control device for continuous measurement of fineness of grind in paint dispersion processes","authors":"Buğra Oğla,&nbsp;Alicia Gutierrez Garcia,&nbsp;Claus Erik Weinell,&nbsp;Kim Dam-Johansen","doi":"10.1016/j.cep.2025.110561","DOIUrl":"10.1016/j.cep.2025.110561","url":null,"abstract":"<div><div>This study investigates the performance and applicability of a newly developed, novel continuous grindometer designed to monitor the fineness of grind via scratches made by particles during pigment dispersion processes. The device offers continuous, real-time measurement and aims to address limitations of the traditional Hegman gauge, such as operator dependency and limited sampling. Comparative tests using various commercial coatings demonstrated that the continuous grindometer can produce results comparable to those of the Hegman gauge. Its performance was further evaluated during the dispersion of different pigments, confirming the device's ability to track changes in fineness over time. The effects of application speed and rheological behavior were also examined. Results showed that scratch visibility depends on both the rotational speed of the applicator and the viscosity of the sample. Optimal performance was achieved with an application speed of at least 10 cm/s and low-shear viscosities in the range of 500–50,000 cP. Overall, the continuous grindometer proved to be a promising alternative to traditional methods, offering in-process quality monitoring, increased sampling volume, and greater measurement objectivity.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"218 ","pages":"Article 110561"},"PeriodicalIF":3.9,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263657","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}

{"title":"Intensification of an extractive distillation process for 2-Methoxyethanol/Toluene separation via double vapor recompression strategy","authors":"Israel dos Santos Lemos,&nbsp;Fernanda Ribeiro Figueiredo,&nbsp;Diego Martinez Prata","doi":"10.1016/j.cep.2025.110558","DOIUrl":"10.1016/j.cep.2025.110558","url":null,"abstract":"<div><div>Toluene and 2-methoxyethanol are commonly generated as waste in the production of paints, varnishes, and in the electrochemical industry. These compounds form an azeotropic mixture, requiring separation through specific processes that are energy-intensive like pressure swing and extractive distillation. Thus, intensification strategies were designed to reduce energy consumption, utility costs, and pollutant emissions. An extractive dividing-wall distillation (EDWC) scheme was previously proposed to intensify the said separation process. As a novel contribution, this work proposes another strategy based on double vapor recompression (DVR). Total annualized cost (TAC) and CO₂ emissions were considered as economic and environmental performance evaluation metrics, respectively. The direct comparison between the EDWC and DVR intensification configurations showed that for a 5-year payback period, both presented equivalent economic performance. However, over a 10-year payback period, the DVR scheme presented savings of 56.80% and 17.67% in CO₂ emissions and TAC, respectively, outperforming its EDWC counterpart. Additionally, the new proposal reaches the break-even point in just 3 years and 4 months when compared to the conventional setup. These results position DVR as a more sustainable and cost-effective solution for retrofitting operating plants globally, aligning with the United Nations Sustainable Development Goals by significantly improving both environmental and economic performance.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"218 ","pages":"Article 110558"},"PeriodicalIF":3.9,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118927","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}

{"title":"Corrigendum to “Floating and motion characteristics of single and multiple wheat straw particles in a stirred tank” [Chemical Engineering and Processing - Process Intensification 217 (2025) 110482]","authors":"Shuang Yang ,&nbsp;Xuejun Hu ,&nbsp;Chao Song ,&nbsp;Da Chen ,&nbsp;Chang Chen ,&nbsp;Guangqing Liu","doi":"10.1016/j.cep.2025.110540","DOIUrl":"10.1016/j.cep.2025.110540","url":null,"abstract":"","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"218 ","pages":"Article 110540"},"PeriodicalIF":3.9,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333202","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}

{"title":"Mixing intensification of an electroosmotic micromixer with circular mixing units and constriction channels","authors":"Morteza Bayareh ,&nbsp;Ahmad Najafpour","doi":"10.1016/j.cep.2025.110557","DOIUrl":"10.1016/j.cep.2025.110557","url":null,"abstract":"<div><div>This paper presents a numerical evaluation of the mixing enhancement mechanisms in a novel electroosmotic microfluidic device featuring circular mixing units connected by microchannels. Flow field and micromixing behavior are analyzed using three-dimensional simulations under a direct current (DC) electric field and two-dimensional simulations with an alternating current (AC) electric field. The results for the DC electric field indicate that when the inlet velocity (U_in) is below 0.1 m/s (Re = 10), increasing the voltage significantly improves the mixing index (MI); however, at an inlet velocity of 0.5 m/s (Re = 50), the MI remains largely unchanged. For the AC-driven micromixer, the MI improves as U_in rises from 0.05 × 10^–3 m/s to 10^–3 m/s. Additionally, the MI grows with increasing AC voltage; however, varying the frequency produces different trends in the MI. High values of the Figure-of-Merit (FoM), which is the ratio of MI to pressure drop (Δp), confirm that the proposed micromixer delivers excellent mixing performance, especially at low inflow velocities.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"218 ","pages":"Article 110557"},"PeriodicalIF":3.9,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107138","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}

{"title":"Natural branching - inspired heat exchanger design for heat transfer enhancement","authors":"Aladdin Mardanov,&nbsp;Ronnie Andersson,&nbsp;Jia Wei Chew","doi":"10.1016/j.cep.2025.110556","DOIUrl":"10.1016/j.cep.2025.110556","url":null,"abstract":"<div><div>The ubiquity of heat exchangers, coupled with the urgent need to augment energy efficiency in the green transition of industries, underscores the importance of optimizing the flow-field design to maximize heat transfer. Inspired by nature-evolved transport networks (e.g., tree branches), this study explores 3D three-level trifurcating pipe networks with varying branching angles (20° - 65°) as alternatives to conventional vertical pipes. Three key conclusions are highlighted. Firstly, steep temperature increases at junctions lead to distinctly different heat transfer and flow behaviors in the middle level among the geometries. Secondly, the relationship between the <em>Re</em>-normalized thermal performance factor (TPF) is non-monotonic with respect to angle, with the 36° model giving the highest TPF/<em>Re</em> value. Thirdly, the superior performance of the 36° model is associated with the lowest mean normalized turbulent viscosity (<em>µ_t/Re</em>) and highest mean normalized vorticity (<em>ΩD/U</em>), suggesting the flow is dominated by coherent rotational strcutures rather than chaotic, dissipative turbulence. These coherent vortices could be leveraged - by judiciously mimicking the 36° configuration - to further enhance thermal performance. Furthermore, the difference in turbulent viscosity between the outer and central pipes in the top level is the least for the 36° model, indicating enhanced uniformity. These findings offer insights for designing efficient, nature-inspired heat exchangers.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"218 ","pages":"Article 110556"},"PeriodicalIF":3.9,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107137","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}

{"title":"In-situ growth of silver particles in polyethersulfone (PES) ultrafiltration membrane for concentrating mangosteen rind extract","authors":"Min Kaung Htet Ko Ko ,&nbsp;Reynard Kin Suryajaya ,&nbsp;Choon Yoong Cheok ,&nbsp;Jing Yao Sum ,&nbsp;Chen Wai Wong ,&nbsp;Hoong Chern Lee","doi":"10.1016/j.cep.2025.110555","DOIUrl":"10.1016/j.cep.2025.110555","url":null,"abstract":"<div><div>Mangosteen rind, often discarded as solid waste, contains bioactive compounds beneficial to public health. Commercial membranes can concentrate these compounds to enhance storage and transport, but prolonged filtration of organic-rich solutions causes biofouling. As process innovation, a mixed-matrix antibacterial membrane was developed by in-situ growth of silver (Ag) particles in a polyethersulfone (PES) ultrafiltration matrix. Ag particles were uniformly distributed on the membrane surface, with cross-sectional EDX mapping showing migration of Ag–PVP complexes to the water interface during phase inversion, driven by hydrophilicity. The triple role of polyvinylpyrrolidone (PVP) as reducing, dispersing, and capping agent was highlighted, with N and O atoms in PVP forming coordinate bonds with Ag⁺ ions. The membrane with 0.1 wt% Ag precursor achieved the highest flux (15.52 L/m²·h·bar) and concentration efficiency (13.80 %), and lowest energy use (0.3560 W·h/L) after two hours of filtering the mangosteen rind extract. Total phenolic content rejection was 81.78–89.28 %, while total monomeric anthocyanin rejection was lower (29.48–58.70 %), indicating the PES/Ag membrane’s potential for fractionating both compounds. Disk diffusion tests confirmed antibacterial resistance of the 1.0 wt% AgNO₃ membrane against <em>Staphylococcus aureus</em> and <em>Escherichia coli</em> with inhibition ring diameters of 0.6 mm and 0.7 mm, respectively. In conclusion, the PES/Ag membrane effectively concentrated phenolic compounds and improved biofouling resistance, with future work focusing on optimizing Ag synthesis and assessing particle leaching.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"218 ","pages":"Article 110555"},"PeriodicalIF":3.9,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227254","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}

{"title":"Numerical parametric study on fluid dynamics performance of a novel corrugated fin packing","authors":"Enhua Zheng ,&nbsp;Lina Tang ,&nbsp;Zhixiang Xia ,&nbsp;Mengxiang Fang ,&nbsp;Ximing Hu ,&nbsp;Yao Fu ,&nbsp;Young-Ok Park ,&nbsp;Tao Wang","doi":"10.1016/j.cep.2025.110551","DOIUrl":"10.1016/j.cep.2025.110551","url":null,"abstract":"<div><div>Post-combustion CO₂ chemical absorption represents a promising carbon capture technology. In chemical absorption processes, structured packings are typically employed for absorbers and desorbers. While the structured packing provides an extensive interfacial surface area to promote gas-liquid reactions, it concurrently induces elevated pressure drop across the absorption system. This study innovatively developed a corrugated fin packing (CFP), and its mass transfer enhancement mechanism was investigated by numerical simulation using a double-plate model as a repeating unit with periodic boundary conditions. Single-phase simulations were conducted to analyze the influence of key geometric parameters (corrugated inclination angle, perforated fin dimensions, fin deflection angle, and perforation ratio) on flow characteristics. The results demonstrated that the fin structure significantly improves flow field distribution through flow-guiding effects and turbulence enhancement mechanisms. The parameters' significance on flow resistance followed this order: corrugated inclination angle &gt; perforated fin dimensions &gt; fin deflection angle &gt; perforation ratio. Optimized CFP achieved a 25 % reduction in dry pressure drop compared to conventional packings. Subsequent gas-liquid countercurrent simulations validated CFP's advantages: compared to traditional 250X and 250Y packings, CFP exhibited 17 % and 15 % higher liquid holdup respectively, 22 % reduction in average fluid velocity, and significantly enhanced wetted area. Although the interfacial area was slightly lower than 250Y packing, its unique flow-guiding configuration ensured uniform liquid distribution and demonstrated superior wet pressure drop performance during stable operation. This study provides both theoretical foundation and technical guidance for developing novel low-resistance, high-efficiency carbon capture packings through structural innovation and mechanism exploration.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"218 ","pages":"Article 110551"},"PeriodicalIF":3.9,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107710","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}

{"title":"Carbon dioxide removal from flue gas of oil production companies using wastewater in microchannel","authors":"Farnaz Aghatayeb ,&nbsp;Babak Aghel ,&nbsp;Ahmad Saei","doi":"10.1016/j.cep.2025.110552","DOIUrl":"10.1016/j.cep.2025.110552","url":null,"abstract":"<div><div>In this article, the chemical absorption of carbon dioxide is performed using desalination and caustic wastewaters in a T-shaped microchannel. To achieve this, the influence of temperature, gas flow rate, and liquid flow rate was investigated. The experimental results demonstrated that operating parameters significantly affect the efficiency of carbon dioxide removal. For example, an increase in gas flow rate leads to a substantial decrease in CO₂ removal efficiency. In optimal conditions, the maximum CO₂ removal coefficient obtained by desalination and caustic wastewater is 93.6 ± 4.7 % and 80.2 ± 4.0 %, respectively. Considering that the chemical absorption of carbon dioxide was carried out on both caustic and desalination effluents, the absorption of carbon dioxide in the desalination effluent was more than the caustic effluent and showed a better performance.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"218 ","pages":"Article 110552"},"PeriodicalIF":3.9,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107275","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}