Chemical Engineering and Processing - Process Intensification最新文献

英文中文

Modeling and simulation of continuous fixed adsorptive distillation with adsorbent regeneration using thermal desorption

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-02-01 DOI: 10.1016/j.cep.2024.110090

Muhammad Mujiburohman

Fixed adsorptive distillation (FAD), a hybrid separation method combining distillation and adsorption, was proven to be able to break the azeotropic point and to enhance the product purity of azeotropic solution. FAD consists of two conventional distillation columns, equipped with an inter-bed of adsorbent. To operate a continuous FAD, a pair of adsorbent beds must be utilized in which adsorption operation and adsorbent regeneration are carried out alternately. This work is a parametric study which aims to model and to simulate a continuous FAD with adsorbent regeneration using thermal desorption. The azeotropic solution model used is water-isopropyl alcohol (IPA) with adsorbent of silica. Variable analysis is conducted to derive the equations, to obtain the appropriate design variable/s, and to systematically calculate the state variables. The appropriate design variables are the adsorptive flow (A_df) and the bottom product of Column 2 (B₂); while the recycle variable is the distillate of Column 2 (D₂). The successful continuous FAD is measured based on the composition of IPA in the feed of Column 2 (x_F2) and that in the distillate of Column 2 (x_D2); both must be above the azeotropic point. To ensure the successful continuous FAD with a fresh feed of 100 mol/min. (30 % mole IPA), relatively pure water and IPA in both bottoms, and equal flow split of adsorptive-bypass flow (R_f = 1), the adsorptive flow and the flow rate of bottom product of Column 2 are operated at (25.00–107.00) mol/min. and (29.77–30.29) mol/min., respectively.

{"title":"Modeling and simulation of continuous fixed adsorptive distillation with adsorbent regeneration using thermal desorption","authors":"Muhammad Mujiburohman","doi":"10.1016/j.cep.2024.110090","DOIUrl":"10.1016/j.cep.2024.110090","url":null,"abstract":"<div><div>Fixed adsorptive distillation (FAD), a hybrid separation method combining distillation and adsorption, was proven to be able to break the azeotropic point and to enhance the product purity of azeotropic solution. FAD consists of two conventional distillation columns, equipped with an inter-bed of adsorbent. To operate a continuous FAD, a pair of adsorbent beds must be utilized in which adsorption operation and adsorbent regeneration are carried out alternately. This work is a parametric study which aims to model and to simulate a continuous FAD with adsorbent regeneration using thermal desorption. The azeotropic solution model used is water-isopropyl alcohol (IPA) with adsorbent of silica. Variable analysis is conducted to derive the equations, to obtain the appropriate design variable/s, and to systematically calculate the state variables. The appropriate design variables are the adsorptive flow (<em>A<sub>df</sub></em>) and the bottom product of Column 2 (<em>B<sub>2</sub></em>); while the recycle variable is the distillate of Column 2 (<em>D<sub>2</sub></em>). The successful continuous FAD is measured based on the composition of IPA in the feed of Column 2 (<em>x<sub>F2</sub></em>) and that in the distillate of Column 2 (<em>x<sub>D2</sub></em>); both must be above the azeotropic point. To ensure the successful continuous FAD with a fresh feed of 100 mol/min. (30 % mole IPA), relatively pure water and IPA in both bottoms, and equal flow split of adsorptive-bypass flow (<em>R<sub>f</sub></em> = 1), the adsorptive flow and the flow rate of bottom product of Column 2 are operated at (25.00–107.00) mol/min. and (29.77–30.29) mol/min., respectively.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"208 ","pages":"Article 110090"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164935","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

Mononitration of N-(4-Methoxyphenyl)acetamide in continuous-flow: Kinetics study and process optimization

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-02-01 DOI: 10.1016/j.cep.2024.110136

Zhiqun Yu , Lishan Geng , Zhaoyang Mu , Jiadi Zhou , Bingbing Chen , Yuyu Yang

Mononitration products of N-(4-Methoxyphenyl)acetamide (NMA) are intermediates of various mature products. However, for the nitration of NMA, N-(4-methoxy-2-nitrophenyl)acetamide (2-NMA) and N-(4-methoxy-3-nitrophenyl) acetamide (3-NMA) will be produced at the same time, making it difficult to control the selectivity of single nitration product, and no kinetics study has ever been reported before. To comprehend the high regioselectivity nitration of NMA more deeply, a microfluidic system was developed to evaluate the reaction kinetics of NMA nitration. At first, two different systems for nitration were identified. Then, the kinetics parameters for these two systems were determined. Next, a series of validation experiments were designed to show the accuracy of the kinetic model. In the end, to obtain a controlled selectivity, the effects of reaction temperature, initial concentration and molar ratio were investigated through the model simulation. Under the conditions optimized by the kinetic model, the selectivity for both 2-NMA and 3-NMA could achieve above 99.5 %, but due to the changes in the properties of the reaction solution, it was extremely difficult to achieve in practice. Ultimately, within the feasibility range of the kinetic model, 98.4 % selectivity of 2-NMA and 96.1 % selectivity of 3-NMA were obtained in the microreactor, respectively.

{"title":"Mononitration of N-(4-Methoxyphenyl)acetamide in continuous-flow: Kinetics study and process optimization","authors":"Zhiqun Yu , Lishan Geng , Zhaoyang Mu , Jiadi Zhou , Bingbing Chen , Yuyu Yang","doi":"10.1016/j.cep.2024.110136","DOIUrl":"10.1016/j.cep.2024.110136","url":null,"abstract":"<div><div>Mononitration products of <em>N</em>-(4-Methoxyphenyl)acetamide (<strong>NMA</strong>) are intermediates of various mature products. However, for the nitration of <strong>NMA</strong>, <em>N</em>-(4-methoxy-2-nitrophenyl)acetamide (<strong>2-NMA</strong>) and <em>N</em>-(4-methoxy-3-nitrophenyl) acetamide (<strong>3-NMA</strong>) will be produced at the same time, making it difficult to control the selectivity of single nitration product, and no kinetics study has ever been reported before. To comprehend the high regioselectivity nitration of <strong>NMA</strong> more deeply, a microfluidic system was developed to evaluate the reaction kinetics of <strong>NMA</strong> nitration. At first, two different systems for nitration were identified. Then, the kinetics parameters for these two systems were determined. Next, a series of validation experiments were designed to show the accuracy of the kinetic model. In the end, to obtain a controlled selectivity, the effects of reaction temperature, initial concentration and molar ratio were investigated through the model simulation. Under the conditions optimized by the kinetic model, the selectivity for both <strong>2-NMA</strong> and <strong>3-NMA</strong> could achieve above 99.5 %, but due to the changes in the properties of the reaction solution, it was extremely difficult to achieve in practice. Ultimately, within the feasibility range of the kinetic model, 98.4 % selectivity of <strong>2-NMA</strong> and 96.1 % selectivity of <strong>3-NMA</strong> were obtained in the microreactor, respectively.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"208 ","pages":"Article 110136"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165036","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

3D-printed packed bed reactor for continuous catalytic hydrogenation of nitroaromatic compounds

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-02-01 DOI: 10.1016/j.cep.2024.110141

Piotr Cyganowski , Włodzimierz Tylus , Sebastian Kinas , Piotr Jamróz

Aromatic amines (AAMs) are essential compounds for producing a wide range of industrial and pharmaceutical products. However, traditional synthesis methods using nitroaromatic compounds (NACs) pose environmental and health risks due to byproduct contamination and the carcinogenic nature of NACs. In this context, this study introduces a novel catalyst containing rhenium (Re) active sites. While this approach does not eliminate the carcinogenic risks associated with NACs, it aims to improve process efficiency. The catalyst, synthesized within a styrene-based matrix functionalized with 1,1′-carbonyldiimidazole, combines high affinity for NACs with the catalytic prowess of Re that may be also a tool in achieving process selectivity. Characterization via XPS and HRTEM confirmed the presence of highly dispersed Re species within the polymer matrix. The catalyst demonstrated superior activity in batch hydrogenation of various NACs, achieving high conversion rates. A 3D-printed packed bed reactor (PBR) was then developed for continuous flow-mode reduction of 4-nitrophenol (4-NP), achieving significant processing capacity and highlighting its potential for scalable applications. This innovative approach not only addresses environmental concerns associated with NACs but also enhances the efficiency of AAM production, presenting a viable solution for industrial processes.

{"title":"3D-printed packed bed reactor for continuous catalytic hydrogenation of nitroaromatic compounds","authors":"Piotr Cyganowski , Włodzimierz Tylus , Sebastian Kinas , Piotr Jamróz","doi":"10.1016/j.cep.2024.110141","DOIUrl":"10.1016/j.cep.2024.110141","url":null,"abstract":"<div><div>Aromatic amines (AAMs) are essential compounds for producing a wide range of industrial and pharmaceutical products. However, traditional synthesis methods using nitroaromatic compounds (NACs) pose environmental and health risks due to byproduct contamination and the carcinogenic nature of NACs. In this context, this study introduces a novel catalyst containing rhenium (<em>Re</em>) active sites. While this approach does not eliminate the carcinogenic risks associated with NACs, it aims to improve process efficiency. The catalyst, synthesized within a styrene-based matrix functionalized with 1,1′-carbonyldiimidazole, combines high affinity for NACs with the catalytic prowess of <em>Re</em> that may be also a tool in achieving process selectivity. Characterization via XPS and HRTEM confirmed the presence of highly dispersed <em>Re</em> species within the polymer matrix. The catalyst demonstrated superior activity in batch hydrogenation of various NACs, achieving high conversion rates. A 3D-printed packed bed reactor (PBR) was then developed for continuous flow-mode reduction of 4-nitrophenol (4-NP), achieving significant processing capacity and highlighting its potential for scalable applications. This innovative approach not only addresses environmental concerns associated with NACs but also enhances the efficiency of AAM production, presenting a viable solution for industrial processes.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"208 ","pages":"Article 110141"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165040","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

Bio-nano hybrid material for mitigating recalcitrant phenolic compounds

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-02-01 DOI: 10.1016/j.cep.2024.110121

João Carlos Silva Conceição , Rafaela G. Machado , Augusto D. Alvarenga , Djalma Lucas de Sousa Maia , Paulo R.R. Mesquita , Luiza A. Mercante , Daniel S. Correa , Eliane Oliveira Silva

The widespread use of phenolic compounds raises concerns regarding their potential damage to human health and the environment. Therefore, developing cost-effective and efficient methods for removing these hazardous pollutants from contaminated aquatic environments becomes essential. Herein, we report on the successful development of a bio-nano hybrid material based on polyacrylonitrile nanofibrous membrane (PAN NMF) combined with Trametes versicolor FC for the removal of phenolic recalcitrant compounds from aqueous media. Specifically, Trametes versicolor FC was immobilized on PAN NMF (PAN@TV NMF) produced by electrospinning. The biohybrid material could efficiently degrade bisphenol A (BPA), tetracycline (TC), methylene blue (MB), and methyl orange (MO), suggesting a synergistic removal by simultaneous adsorption and biotransformation processes. Among all pollutants assayed, TV and PAN@TV NMF removed BPA more easily and efficiently, with removal rates above 50 % after 72 hours. Furthermore, the biotransformation pathways were investigated, and the chemical structures of the fungal metabolites were proposed according to their high-resolution mass data. BPA, MB, and MO underwent biotransformation into simpler, easily biodegradable compounds with potentially lower toxicity. Our findings provide new insights into removing hazardous phenolic compounds from water sources by immobilizing fungi on nanofiber membranes, highlighting their potential applications in wastewater treatment and pollutant remediation.

{"title":"Bio-nano hybrid material for mitigating recalcitrant phenolic compounds","authors":"João Carlos Silva Conceição , Rafaela G. Machado , Augusto D. Alvarenga , Djalma Lucas de Sousa Maia , Paulo R.R. Mesquita , Luiza A. Mercante , Daniel S. Correa , Eliane Oliveira Silva","doi":"10.1016/j.cep.2024.110121","DOIUrl":"10.1016/j.cep.2024.110121","url":null,"abstract":"<div><div>The widespread use of phenolic compounds raises concerns regarding their potential damage to human health and the environment. Therefore, developing cost-effective and efficient methods for removing these hazardous pollutants from contaminated aquatic environments becomes essential. Herein, we report on the successful development of a bio-nano hybrid material based on polyacrylonitrile nanofibrous membrane (PAN NMF) combined with <em>Trametes versicolor</em> FC for the removal of phenolic recalcitrant compounds from aqueous media. Specifically, <em>Trametes versicolor</em> FC was immobilized on PAN NMF (PAN@TV NMF) produced by electrospinning. The biohybrid material could efficiently degrade bisphenol A (BPA), tetracycline (TC), methylene blue (MB), and methyl orange (MO), suggesting a synergistic removal by simultaneous adsorption and biotransformation processes. Among all pollutants assayed, TV and PAN@TV NMF removed BPA more easily and efficiently, with removal rates above 50 % after 72 hours. Furthermore, the biotransformation pathways were investigated, and the chemical structures of the fungal metabolites were proposed according to their high-resolution mass data. BPA, MB, and MO underwent biotransformation into simpler, easily biodegradable compounds with potentially lower toxicity. Our findings provide new insights into removing hazardous phenolic compounds from water sources by immobilizing fungi on nanofiber membranes, highlighting their potential applications in wastewater treatment and pollutant remediation.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"208 ","pages":"Article 110121"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163815","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

Experimental investigation of mass transfer performance of a 3D printed novel structured packing – SpiroPak

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-02-01 DOI: 10.1016/j.cep.2024.110132

Qiaoran Liu , Linxiao Yan , Tejas Bhatelia , Vishnu Pareek , Biao Sun

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.

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引用次数: 0

Modeling and optimization of reverse salt diffusion and water flux in forward osmosis by response surface methodology and artificial neural network

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-02-01 DOI: 10.1016/j.cep.2024.110140

Ahmad Hosseinzadeh, Ali Altaee, Ibrar Ibrar, John L. Zhou

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.

{"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, Ali Altaee, Ibrar Ibrar, 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<sup>+</sup> 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}

引用次数: 0

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

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-02-01 DOI: 10.1016/j.cep.2024.110143

Sanjay Kumar Gupta

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.

{"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}

引用次数: 0

Additive manufactured helical micro distillation units for modular small-scale plants

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-02-01 DOI: 10.1016/j.cep.2024.110113

Fabian Grinschek , Jannik Betz , Chen-Mei Chiu , Sören Dübal , Christoph Klahn , Roland Dittmeyer

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.

{"title":"Additive manufactured helical micro distillation units for modular small-scale plants","authors":"Fabian Grinschek , Jannik Betz , Chen-Mei Chiu , Sören Dübal , Christoph Klahn , 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}

引用次数: 0

An effective procedure for optimized design of heat pump distillation process

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-02-01 DOI: 10.1016/j.cep.2024.110096

Yongshuai Li , Yan Gao , Gaoyang Li , Yi Zheng , Hui Pan , Hao Ling

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.

引用次数: 0

Analysis of novel configurations of an intensified process for ethyl lactate production

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-02-01 DOI: 10.1016/j.cep.2024.110146

Murielk Sebrian Valvassore, Caliane Bastos Borba Costa

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.

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