Chemical Engineering and Processing - Process Intensification最新文献

Comparing a new semi-empirical mathematical model and a neural network for the description and forecasting of reversible fouling in membrane bioreactors

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-03-06 DOI: 10.1016/j.cep.2025.110256

Victorino Diez , José María Cámara , Miguel Cantera , Adrián Bonilla , Cipriano Ramos

{"title":"Comparing a new semi-empirical mathematical model and a neural network for the description and forecasting of reversible fouling in membrane bioreactors","authors":"Victorino Diez , José María Cámara , Miguel Cantera , Adrián Bonilla , Cipriano Ramos","doi":"10.1016/j.cep.2025.110256","DOIUrl":"10.1016/j.cep.2025.110256","url":null,"abstract":"<div><div>This study compares the predictive capability of membrane fouling between a new semi-empirical mathematical model and a neural network. Calibration and validation involved 21 replicated flux-step experiments with 8 filtration fluxes ranging from 9.8 to 18.9 L/m²·h and 40-hour random-flux experiments conducted in an anaerobic membrane bioreactor. The inherent variability of reversible fouling linked to cake build-up was quantified.</div><div>In addition to cake build-up and compression, the mathematical model incorporates the restoration of residual fouling not removed by backwashing, including the rearrangement of non-detached particles and colloids, initial pore-blocking, and concentration polarization. The model predicts reversible fouling across a wide range of filtration fluxes, even beyond those used for calibration. Random-flux experiments revealed fouling trends undetectable via direct transmembrane pressure inspection. However, the mathematical model fails when the effective membrane area decreases during filtration.</div><div>The neural network predicts fouling patterns independently of underlying mechanisms, offering adaptability across a broader range of operating conditions. Nonetheless, it struggles to predict reversible fouling for flux ranges outside its training dataset, particularly at fluxes significantly higher or lower than those used in training.</div><div>The present study offers insight into reversible fouling description in order to enhance the performance of membrane bioreactors.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"212 ","pages":"Article 110256"},"PeriodicalIF":3.8,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549956","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

Investigation of supersonic flow in a Laval nozzle with different convergent and divergent geometries

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-03-04 DOI: 10.1016/j.cep.2025.110247

L.L.X. Augusto , K.R.B. Melo , M.L. Aguiar , V.G. Guerra , G.C. Lopes

{"title":"Investigation of supersonic flow in a Laval nozzle with different convergent and divergent geometries","authors":"L.L.X. Augusto , K.R.B. Melo , M.L. Aguiar , V.G. Guerra , G.C. Lopes","doi":"10.1016/j.cep.2025.110247","DOIUrl":"10.1016/j.cep.2025.110247","url":null,"abstract":"<div><div>Supersonic separators have emerged from researches of new technologies to eliminate impurities from natural gas. The nozzle geometry plays an important role on the flow stability and on the condensation of components of the natural gas. Notable attention has been devoted to the design of the convergent section, whereas the impact of the divergent part on internal nozzle flow remains understudied. This paper puts forward a numerical investigation of the supersonic air flow inside a Laval nozzle for different designs of both convergent and divergent sections. The results have shown that the flow is more affected by the divergent geometry than by the convergent design. Disturbances on the flow were observed when a linear shape is used in the later part. The disturbances formed when a linear divergent section were progressively reduced as the length of the constant area portion increases. By using an Arina divergent section, smaller velocity gradients were observed, which can be a positive aspect for phase separation during the condensation process. Different pressures were assigned at inlet and outlet of the nozzle and the results indicates that moderate pressures can mitigate re-evaporation and provides sufficient time for droplet nucleation and growth during the condensation.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"212 ","pages":"Article 110247"},"PeriodicalIF":3.8,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562452","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

Effect of dry / wet steam outlet area ratio on the performance of supersonic separator

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-03-03 DOI: 10.1016/j.cep.2025.110259

Weiwei Xu , Fuhao Wang , Shiwen Yu

引用次数: 0

Integration of indirect mechanism autothermal reforming process with chilled methanol scrubbing solution for syngas purification: Power generation exploiting blue hydrogen as fuel

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-02-25 DOI: 10.1016/j.cep.2025.110248

Mohammadreza Malekli , Alireza Aslani , Tara Ghaffarinejad

{"title":"Integration of indirect mechanism autothermal reforming process with chilled methanol scrubbing solution for syngas purification: Power generation exploiting blue hydrogen as fuel","authors":"Mohammadreza Malekli , Alireza Aslani , Tara Ghaffarinejad","doi":"10.1016/j.cep.2025.110248","DOIUrl":"10.1016/j.cep.2025.110248","url":null,"abstract":"<div><div>This paper focuses on the design of blue hydrogen production through indirect mechanism autothermal reforming of natural gas applied to a combined cycle power plant with 420 MW total gross power generation. Excluding the pre-combustion CO<sub>2</sub> capture, a natural gas combined cycle power plant has been modeled as a reference case. Despite the traditional configuration, all the required heat in stripping towers is generated from the ATR process. Moreover, a double-pressure organic Rankine cycle is coupled with the reforming process through heat integration. Approximately 10.36 kg/s H<sub>2</sub> with 96.137 mol% purity, 67.41 MJ/kg Lower Heating Value, and 78.42% Cold Gas Efficiency is produced by 93.87% CO<sub>2</sub> capture ratio in the Rectisol process with the specific heating consumption of ∼1.59 MJ/kg CO<sub>2</sub>. The final plant demonstrates that the total net power generation has improved from 353.24 MW to 382.38 MW, and net efficiency has been ameliorated by 4.17%. Additionally, the energy penalty is remarkably reduced by 7.19% compared to a plant without an organic Rankine cycle. Eventually, the specific CO<sub>2</sub> emission decreased from 31.98 to 29.55 gCO<sub>2</sub>/kWh, as well as the annual emission of CO<sub>2</sub> that has declined significantly from 1231.66 to 98.97 ktons/year.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"212 ","pages":"Article 110248"},"PeriodicalIF":3.8,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562451","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

Sonoluminescence and H2O2 produced in water under different ultrasound operating conditions applied to the sono-photo-Fenton landfill leachate treatment

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-02-24 DOI: 10.1016/j.cep.2025.110246

Flavio Alanís , Rainer Nordenflycht , Matías Guerrero , Katherine Villalobos , Rodrigo Poblete , C.A. Rodríguez , Norma Pérez , Ernesto Cortés , Ricardo A. Torres-Palma

{"title":"Sonoluminescence and H2O2 produced in water under different ultrasound operating conditions applied to the sono-photo-Fenton landfill leachate treatment","authors":"Flavio Alanís , Rainer Nordenflycht , Matías Guerrero , Katherine Villalobos , Rodrigo Poblete , C.A. Rodríguez , Norma Pérez , Ernesto Cortés , Ricardo A. Torres-Palma","doi":"10.1016/j.cep.2025.110246","DOIUrl":"10.1016/j.cep.2025.110246","url":null,"abstract":"<div><div>Given the global issue of water scarcity, the recovery and treatment of wastewater, as landfill leachate (LL), are of utmost importance. The presence of colloids in LL scatters UV irradiation, limiting the effectiveness of the photo-Fenton process. However, using ultrasound (US) technology can degrade the organic matter in LL and produce H<sub>2</sub>O<sub>2</sub> and sonoluminescence, which are crucial in the photo-Fenton process. With its focus on practical applications, this research aims to improve the quality of LL treatment, thereby addressing a significant and urgent environmental challenge. Also, this research aimed to identify the optimal operational parameters that improve the self-generated H<sub>2</sub>O<sub>2</sub> and sonoluminescence due to the US and to evaluate the improvement of the quality of LL using the sono-photo-Fenton.</div><div>Actinometry was used to measure the sonoluminescence produced in this study. The highest amount of H2O<sub>2</sub> and sonoluminescence was formed at 864 kHz and a US power of 500 W, obtaining 2.63 mg/L of H<sub>2</sub>O<sub>2</sub> and 6.89 × 10<sup>−5</sup> J/s of sonoluminescence. The optimised conditions were used in the sono-photo-Fenton process runs towards the degradation of a simulated LL (SLL) to evaluate the effect of concentration of Fe<sup>+2</sup> and concentration of H<sub>2</sub>O<sub>2</sub> on the depuration of SLL, obtaining a synergy index of 1.25.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"211 ","pages":"Article 110246"},"PeriodicalIF":3.8,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510362","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

Continuous flow wastewater induced plasma microbubbles for the enhancement of mass transfer and degradation of dye pollutants in a bubble column reactor

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-02-23 DOI: 10.1016/j.cep.2025.110245

Shuang Wang , Weicheng Pan , Haijiang Zhang , Hao Chen , Rong Chen

{"title":"Continuous flow wastewater induced plasma microbubbles for the enhancement of mass transfer and degradation of dye pollutants in a bubble column reactor","authors":"Shuang Wang , Weicheng Pan , Haijiang Zhang , Hao Chen , Rong Chen","doi":"10.1016/j.cep.2025.110245","DOIUrl":"10.1016/j.cep.2025.110245","url":null,"abstract":"<div><div>To enhance the mass transfer and organic pollutants oxidation in the plasma bubble column reactor (BCR), a Venturi tube was utilized to produce flowing wastewater containing plasma microbubbles by hydrodynamic cavitation (HC) effect. Meanwhile, the convection of wastewater was optimized through adjusting Reynolds number at the throat of the Venturi tube (<em>Re<sub>T</sub></em>: 5870 – 56,300). The variation of <em>C<sub>v</sub></em> and ΔP with the <em>Re<sub>T</sub></em> revealed the starting point of the HC at the <em>Re<sub>T</sub></em> of 24,600 (210 L·h<sup>-1</sup>). The HC effect reduced the minimum plasma bubble size <em>d</em> to 100 μm and increased the gas holdup of plasma bubbles (11 %). Comparing the plasma bubbling mode without liquid flow, energy yield (<em>EY</em>) of plasma degradation (2333 mg·kWh<sup>-1</sup> at the removal of 90 %) and the volumetric mass transfer coefficient (<em>k<sub>l</sub>a</em> = 0.037 s<sup>-1</sup>) was improved by 1.63 and 3.08 times, respectively. The dimensionless mass transfer correlation among Reynolds number <em>Re</em> (220 – 2113), Froude number <em>Fr</em> (0.0019 – 0.0075), initial concentration difference (<em>c</em><sub>0</sub>/<em>c</em><sub>50</sub>: 0.5 – 2.0), and Sherwood number <em>Sh</em> in the HC-BCR have been established. This study provides insights to optimize the convection of wastewater in the HC channel for the enhancement of plasma oxidation in the BCR.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"211 ","pages":"Article 110245"},"PeriodicalIF":3.8,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488392","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

Ultrasound-assisted natural deep eutectic solvents extraction of flavonoids from Hippophae rhamnoides: Optimization and kinetics studies

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-02-23 DOI: 10.1016/j.cep.2025.110244

Chenlu Han , Ziwei Yang , Xiaoqiang Chen , Lin Yan , Ying Zhang

引用次数: 0

Efficient recovery of valuable metals from low-grade zinc residue by ultrasonic strengthening

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-02-21 DOI: 10.1016/j.cep.2025.110240

Chun Wang , Hongying Xia , Yingjie Xu , Zhanqing Lu , Qifei Pei , Linqing Dai , Libo Zhang

{"title":"Efficient recovery of valuable metals from low-grade zinc residue by ultrasonic strengthening","authors":"Chun Wang , Hongying Xia , Yingjie Xu , Zhanqing Lu , Qifei Pei , Linqing Dai , Libo Zhang","doi":"10.1016/j.cep.2025.110240","DOIUrl":"10.1016/j.cep.2025.110240","url":null,"abstract":"<div><div>As zinc ore resources continue to dwindle, the exploitation and utilization of secondary zinc-containing resources have garnered significant attention. This thesis presents an innovative methodology referred to as the ultrasound synergistic manganese dioxide oxidizing acid leaching process, specifically designed for treating complex acid leaching residues obtained from primary zinc oxide ore. ICP-OES analysis revealed that the zinc leaching residues contain 4.57 % zinc, 55.81 % oxygen, 13.51 % calcium, 11.33 % sulfur, 4.39 % iron, 3.23 % silicon, and 0.62 % lead. Optimal operational parameters were determined through a one-factor experimental design under ultrasonication, which included a manganese dioxide concentration of 11.11 g/L, an initial acidity of 160 g/L, a liquid-solid ratio of 7 mL/g, ultrasonic power set at 420W, and leaching conducted at a temperature of 85°C for a duration of 30 min, achieving a zinc leaching rate of 95.68 %. Characterization studies demonstrated that the synergistic effect of ultrasonic waves and manganese dioxide not only disintegrated the mineral surfaces, opened mineral inclusions and released encapsulated zinc but also accelerated the reaction, ultimately enhancing the leaching rate of zinc. Compared to existing methods, this ultrasonic-assisted oxidizing acid leaching process can improve zinc recovery by 10 % and cut the leaching time down to 30 min.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"211 ","pages":"Article 110240"},"PeriodicalIF":3.8,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510751","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

Development of magnetite modified graphite electrode: Application in electro-Fenton process for degradation of antidiabetic drug metformin hycloridate

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-02-21 DOI: 10.1016/j.cep.2025.110243

Ingrid Larissa da Silva Santana , Marina Gomes Silva , Gabriel Paiva Ourem , Vanessa de Oliveira Marques Cavalcanti , Ana Maria Mendonça de Albuquerque Melo , José Luís Ferreira Sá , Alex Leandro Andrade de Lucena , Daniella Carla Napoleão , Marta Maria Menezes Bezerra Duarte

{"title":"Development of magnetite modified graphite electrode: Application in electro-Fenton process for degradation of antidiabetic drug metformin hycloridate","authors":"Ingrid Larissa da Silva Santana , Marina Gomes Silva , Gabriel Paiva Ourem , Vanessa de Oliveira Marques Cavalcanti , Ana Maria Mendonça de Albuquerque Melo , José Luís Ferreira Sá , Alex Leandro Andrade de Lucena , Daniella Carla Napoleão , Marta Maria Menezes Bezerra Duarte","doi":"10.1016/j.cep.2025.110243","DOIUrl":"10.1016/j.cep.2025.110243","url":null,"abstract":"<div><div>Metformin hydrochloride (CMTF) is a widely used antidiabetic medication. However, the increase in its consumption combined with the fact that only 10 % of the drug is metabolized by the body, can promote contamination of the aquatic environment. Thus, the objective of the work was to develop a modified graphite electrode impregnated with magnetite, not yet reported in the literature, and apply it in the treatment of the drug CMTF via electro-Fenton. The higher degradation percentage obtained for the aqueous solution (AS) was 83.55 %. The developed electrode was applied in the treatment of synthetic effluent (SE) leading to 65.69 % degradation. Furthermore, the degradation of the drug, in both matrices, follows pseudo-first order kinetics and that at the end of the kinetic monitoring, 96 % and 66 % degradation was obtained for the AS and SE matrices, respectively. Furthermore, SE after treatment showed a reduction of 56.41 %, 39.04 % and 37.14 % for COD, BOD and TOC, respectively. Finally, it was verified that for the aqueous solution before and after treatment there was no toxicity. Thus, it can be stated that the treatment using the proposed electrode has the potential for drug degradation in different matrices.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"211 ","pages":"Article 110243"},"PeriodicalIF":3.8,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510667","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

Particle tuning in reactive crystallization via microwave-assisted temperature cycling for improved downstream performance

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-02-20 DOI: 10.1016/j.cep.2025.110241

Athanasios Arampatzis , Ioannis Papaioannou , Tom Van Gerven , Georgios D. Stefanidis

{"title":"Particle tuning in reactive crystallization via microwave-assisted temperature cycling for improved downstream performance","authors":"Athanasios Arampatzis , Ioannis Papaioannou , Tom Van Gerven , Georgios D. Stefanidis","doi":"10.1016/j.cep.2025.110241","DOIUrl":"10.1016/j.cep.2025.110241","url":null,"abstract":"<div><div>Efficient particle processing during and downstream of a crystallization process is a paramount task in pharmaceutical industry regarding production of Active Pharmaceutical Ingredients (APIs). Due to mass transfer limitations, supersaturation is often not uniformly controlled in reactive crystallization processes generating an excessive amount of fine particles, which often tend to agglomerate causing issues in downstream operations, such as filtration and drying. We demonstrate rapid microwave-assisted temperature cycling (RMWTC) as a post-treatment approach that can effectively address these problems. Specifically, we report that in the event of high solids load systems, RMWTC intensifies fines dissolution during rapid heating and promotes faster recrystallization on surviving surfaces during rapid cooling. The RMWTC approach facilitates tuning not only of particle size, but possibly of crystal morphology by increasing the number of stable agglomerates with a positive concomitant impact on particle filterability and process time. A thermal parametric study on an aromatic amine API intermediate system revealed that there is an optimal temperature operating window (60 °C-105 °C) that shifts particle size distribution (PSD) towards larger particle sizes and yields up to 82 % improved filterability at 50 % less process time compared to the traditional particle control strategy, currently applied in industry for this process.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"211 ","pages":"Article 110241"},"PeriodicalIF":3.8,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549770","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