Chemical Engineering and Processing - Process Intensification最新文献

{"title":"Experimental investigation of mass transfer performance of a 3D printed novel structured packing – SpiroPak","authors":"Qiaoran Liu ,&nbsp;Linxiao Yan ,&nbsp;Tejas Bhatelia ,&nbsp;Vishnu Pareek ,&nbsp;Biao Sun","doi":"10.1016/j.cep.2024.110132","DOIUrl":"10.1016/j.cep.2024.110132","url":null,"abstract":"<div><div>Traditional structured packings used in petrochemical engineering are commonly constrained by their corrugated and sectional design, which may limit their hydrodynamic and mass transfer capabilities under certain conditions, leading to a growing need for innovative packings to overcome these potential constraints. This research studies the effectiveness of a novel 3D-printed structured packing, known as SpiroPak, specifically in the context of carbon dioxide absorption. It is observed that SpiroPak outperforms conventional commercial packing in terms of mass transfer efficiency. Extensive experimental data was gathered to compare packing performances under varying process parameters. The study included parametric analyses to explore the impact of gas and liquid loads, as well as CO₂ and NaOH concentrations. The results demonstrate that SpiroPak exhibits a 40 % more enhancement in mass transfer efficiency compared to conventional packing. Notably, the investigation into factors impacting SpiroPak's performance highlights that gas load has the most substantial impact on mass transfer compared to other operating conditions. This study presents a comprehensive comparison and benchmark of the packing performance, offering in-depth observations for optimising packing parameters and driving further advancements in this field.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"208 ","pages":"Article 110132"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164936","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}

{"title":"Modeling and optimization of reverse salt diffusion and water flux in forward osmosis by response surface methodology and artificial neural network","authors":"Ahmad Hosseinzadeh,&nbsp;Ali Altaee,&nbsp;Ibrar Ibrar,&nbsp;John L. Zhou","doi":"10.1016/j.cep.2024.110140","DOIUrl":"10.1016/j.cep.2024.110140","url":null,"abstract":"<div><div>Forward osmosis is an emerging technology for desalination and wastewater treatment, which is hindered by reverse salt diffusion into the feed. This study experimentally investigated reverse salt diffusion, and modeled and optimized using response surface methodology (RSM) and artificial neural network (ANN). The Pareto analysis showed that draw solution electroconductivity (EC), feed solution EC, interaction between the flow rates of feed and draw solutions, and interaction between the flow rate of draw solution and operating time were the most effective parameters of Na⁺ reverse diffusion model in decreasing order. For the water flux model, the most effective parameters were draw solution EC, draw solution flow rate, feed solution EC, interaction between draw solution flow rate and feed solution EC, and between feed solution flow rate and time. The optimized operating conditions in FO were 1.07 L/min feed flow, 1.41 L/min draw flow, 50.54 mS/cm draw EC, 5.02 mS/cm feed EC and 4 h of operation. Both RSM and ANN models effectively simulated Na⁺ reverse diffusion and water flux with R² values of 0.948 and 0.958 and 0.984 and 0.968, respectively. Overall, the ANN models exhibited slightly better performance and are recommended for the simulation and modeling of membrane processes.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"208 ","pages":"Article 110140"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165035","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}

{"title":"Experimental pool boiling heat transfer performance analysis on novel two-stage hybrid aligned copper oxide nanowires that stand independently and one over the other (nanowires on nanowires) surfaces","authors":"Sanjay Kumar Gupta","doi":"10.1016/j.cep.2024.110143","DOIUrl":"10.1016/j.cep.2024.110143","url":null,"abstract":"<div><div>Pool boiling capability was examined in relation to the function of copper oxide metal nanowires with varying height/density ratios. Employing a purposefully designed array of two-stage linked copper oxide nanowires, we anticipate improving liquid transport abilities and achieving significant progress towards our aim of improving critical heat flux (CHF) and heat transfer coefficient (HTC). In order to create highly dense nanostructures with continuous pitching and structure, we create two-stage oriented copper oxide nanowires which exist autonomously and one on top of the other. The fluidic resistivity caused by separate and thin grids of structures can be minimised by a hybrid unique two-stage configuration. Wicking width on hybrid nanowires is therefore regulated at the same time. It was found that boiling incipience superheat decreased, which is crucial for electronics devices. It was discovered that there was a rise in the HTC (up to 423.82 %) and the CHF (up to 105 %). The total amount of nanowires for each surface area grows as the density of nanowires rises. In favourable to pool boiling improvement, this raises both the density and dimensions of micron to nanoscale cavities. It further delays surface dryout and CHF by lowering liquid flow barrier at higher heat flux levels.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"208 ","pages":"Article 110143"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165039","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":"Additive manufactured helical micro distillation units for modular small-scale plants","authors":"Fabian Grinschek ,&nbsp;Jannik Betz ,&nbsp;Chen-Mei Chiu ,&nbsp;Sören Dübal ,&nbsp;Christoph Klahn ,&nbsp;Roland Dittmeyer","doi":"10.1016/j.cep.2024.110113","DOIUrl":"10.1016/j.cep.2024.110113","url":null,"abstract":"<div><div>The design and manufacture of microstructured distillation equipment is challenging. Additive manufacturing has the potential to facilitate the creation of new, efficient equipment. Our design of modular distillation units with helical flow path demonstrates this potential. We examined the separation efficiency at total reflux with cyclohexane/heptane. Due to the design being ready for manufacturing, various variants with different geometric parameters, including channel height and number of turns, were investigated. The experiments revealed that the primary helical structure is critical to separation performance and that unit coupling can enhance separation efficiency. Additionally, the impact of the mounting angle on separation performance was studied and verified. Especially at low loads, a significant increase was observed. Cold flow experiments using transparent 3D-printed resin columns demonstrate the influence of tilting on flow and aid in understanding the effect. Characterizations throughout the entire operating range, up to the flooding point, conclude the research.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"208 ","pages":"Article 110113"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165046","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}

{"title":"An effective procedure for optimized design of heat pump distillation process","authors":"Yongshuai Li ,&nbsp;Yan Gao ,&nbsp;Gaoyang Li ,&nbsp;Yi Zheng ,&nbsp;Hui Pan ,&nbsp;Hao Ling","doi":"10.1016/j.cep.2024.110096","DOIUrl":"10.1016/j.cep.2024.110096","url":null,"abstract":"<div><div>Research on heat pump-assisted (HP) distillation columns, especially those applied to divided-wall column (DWC), is increasing due to their potential for energy savings in distillation processes. HP systems offer various configurations and multiple decision variables, which increase computational demands across different distillation systems. In this contribution, a heat pump superstructure (HPS) method is developed and proposed that includes five common HP configurations. Combined with an improved differential evolution algorithm, the optimal HP structure in multiple configurations for different optimization tasks is automatically computed. The advantage of HPS method is that it could be incorporated in distillation columns to systematically and simply find an optimum configuration for various separator systems and separation tasks. The HPS effectively achieves optimal design configurations for binary columns, three-component DWCs, and four-component KDWC separation systems under varying pricing standards.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"208 ","pages":"Article 110096"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164909","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":"Analysis of novel configurations of an intensified process for ethyl lactate production","authors":"Murielk Sebrian Valvassore,&nbsp;Caliane Bastos Borba Costa","doi":"10.1016/j.cep.2024.110146","DOIUrl":"10.1016/j.cep.2024.110146","url":null,"abstract":"<div><div>Ethyl lactate is a biodegradable and non-toxic ester with market growth potential. It is used in different industries. In this work, aiming to reduce the production cost of this solvent, seeking to make it even more competitive in the market, an intensified process was proposed and evaluated with a reactive distillation column followed by extractive distillation for recovery and reuse of compounds present in the process. An optimization study was developed using Aspen Plus and MATLAB® in order to find a configuration with the minimum total annualized cost (TAC). An economically competitive structure was found. Based on this structure, simulation studies were developed by applying the vapor recompression technique in the extractive distillation column and keeping the reactive distillation column. In economic terms, an even more competitive structure, was found, with a reduction of around 48 % in the TAC compared to the results reported in the literature.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"208 ","pages":"Article 110146"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165041","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":"Comparative performance assessment of direct contact membrane distillation with and without localized heating","authors":"Rajeev Awasthi,&nbsp;K. Ravi Kumar","doi":"10.1016/j.cep.2024.110133","DOIUrl":"10.1016/j.cep.2024.110133","url":null,"abstract":"<div><div>In the present study, a comprehensive investigation of direct contact membrane distillation with and without localized heating using an effectiveness-number of transfer units (ε-NTU) approach is presented. In addition, the effect of various operating parameters on DCMD performance has been studied. It can be inferred from the analysis that feed solution temperature, membrane porosity, pore diameter and thickness of membrane are the prime influential parameters in determining DCMD performance in terms of distillate flux, gain output ratio (GOR), specific energy consumption (SEC) and overall efficiency. An 80 % increase in feed temperature has resulted increase in permeate flux from 3.1 kg/m²-h to 23.3 kg/m²-h in without localized heating case and from 15.8 kg/m²-h to 73.2 kg/m²-h with localized heating configuration. However, the inclusion of localized heating has increased the distillate flux 2.13 times at 90 °C feed temperature. Furthermore, by increasing the membrane porosity by 50 %, the distillate flux is enhanced from 3.1 kg/m²-h to 11.37 kg/m²-h and from 15.8 kg/m²-h to 57.64 kg/m²-h in the cases of no localized heating and with localized heating respectively. Additionally, the results of the mathematical model suggest a design and operating framework for optimum DCMD performance to minimize temperature and concentration polarization.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"208 ","pages":"Article 110133"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165042","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":"Optimal design of CCLC coupled SCO2 Brayton cycle process based on molecular dynamics and steady-state simulation","authors":"Xiaomin Fan,&nbsp;Tianshu Wang,&nbsp;Zhe Li,&nbsp;Zhe Cui,&nbsp;Bin Liu,&nbsp;Wende Tian","doi":"10.1016/j.cep.2025.110200","DOIUrl":"10.1016/j.cep.2025.110200","url":null,"abstract":"<div><div>In China, coal-fired power generation still dominates the electricity supply. However, the extensive use of coal has increased environmental and sustainable development issues. Therefore, a novel process of coal chemical looping combustion (CCLC) coupled supercritical CO₂ (SCO₂) Brayton cycle system is designed through molecular dynamics (MD) simulation and process simulation in this paper. Firstly, the reaction kinetics of the CCLC process are investigated using MD simulation, obtaining the activation energy of the reactions of fuel reactor (FR) and air reactor (AR) as 57.58 kJ/mol and 34.26 kJ/mol, respectively. Subsequently, the proposed CCLC coupled Brayton cycle system is designed based on the results of MD simulation. Finally, the key parameters are analyzed based on the cycle efficiency to realize process optimization. The cycle efficiency of the novel process proposed can reach 80.19 %, which is of great significance in reducing CO₂ emissions and improving energy conversion efficiency.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"209 ","pages":"Article 110200"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143225420","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":"High-Throughput Synthesis of Superparamagnetic Fe3O4 Nanoparticles in Chaotic Convection Mode","authors":"Mingxin Li,&nbsp;Wensheng Wang,&nbsp;Cong Xu","doi":"10.1016/j.cep.2024.110134","DOIUrl":"10.1016/j.cep.2024.110134","url":null,"abstract":"<div><div>Conventional batch reactors are difficult to fabricate high-quality superparamagnetic Fe₃O₄ nanoparticles at high throughput due to their high energy consumption and low mixing efficiency. We designed a four-stage oscillating feedback micromixer (FOFM) to achieve efficient mixing and mass transfer at high throughput. The FOFM can induce strong chaotic convection, resulting in a uniform concentration field and a narrow residence time distribution. High-quality superparamagnetic Fe₃O₄ nanoparticles were successfully synthesized in the FOFM using a microemulsion method. Even at a high throughput of 155 mL/min (<em>Q</em>_total), the synthesized Fe₃O₄ nanoparticles had an average particle size of 8.98 nm, a particle size distribution of 3–18 nm, and a saturation magnetization of 66 emu/g, and the productivity could reach 63.2 g/h which was three times higher than that of the conventional batch reactor. The FOFM has been proven to have great application potential in the synthesis of high-throughput and high-quality nanoparticles.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"208 ","pages":"Article 110134"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163390","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":"Integrated system of electrocoagulation, activated sludge, and electrooxidation for the treatment of oil refinery wastewater","authors":"José Treviño-Reséndez ,&nbsp;Mónica Razo-Negrete ,&nbsp;Luis A. Godínez ,&nbsp;Yunny Meas ,&nbsp;Josué D. García-Espinoza","doi":"10.1016/j.cep.2024.110135","DOIUrl":"10.1016/j.cep.2024.110135","url":null,"abstract":"<div><div>This study assessed a treatment train consisting of an electrocoagulation process (with aluminum electrodes), an activated sludge system, and an electrooxidation process using a SnO₂-RuO₂-IrO₂|Ti anode to obtain an effluent suitable for reuse as make-up water in cooling systems. The integration of the electrochemical processes and the biological system reached the required quality limits, resulting in an effluent with chemical oxygen demand and dissolved organic carbon of 36 ± 7.8 mg L⁻¹ and 10.2 ± 0.4 mg L⁻¹, respectively, which complies with the 60 mg L⁻¹ limit reported by U.S. Environmental Protection Agency in 2012. In addition, the N-NH₄ and total suspended solids parameters met the limits of 1 mg L⁻¹ and 10 mg L⁻¹, respectively, also established by this standard. Regarding dissolved salts that can promote scale formation, the treated water had a silica concentration, measured as SiO₂, of 39.8 ± 4.5 mg L⁻¹. The reduction in calcium and total hardness was only 15–20%. The evaluation of acute toxicity by the Microtox® method showed that the toxicity of the wastewater was reduced up to 2.25% and 0.23% at 5 and 15 min of exposure, respectively, after the treatment train. The impact of primary treatment by electrocoagulation on the secondary process was also observed, showing a more stable performance in the biodegradation of organic matter, nitrification, and acute toxicity. Integrating the electrocoagulation-activated sludge-electrooxidation processes, combined with an adequate softening treatment, is suggested as a potential alternative treatment train for oil refinery wastewater to produce a suitable effluent for reuse in cooling systems. This research represents a groundbreaking innovation, combining advanced physicochemical and biological processes to enhance complex pollutant removal, reduce chemical usage and environmental impact, and a more sustainable approach to meeting stringent environmental standards.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"208 ","pages":"Article 110135"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163393","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}