Chemical Engineering and Processing - Process Intensification最新文献

{"title":"Effect of the thermal insulation layer on non-equilibrium condensation in the nozzle for carbon capture","authors":"Xiaoyang Han,&nbsp;Tongsheng Wang,&nbsp;Zhiheng Wang,&nbsp;Jianan Chen,&nbsp;Zhu Huang","doi":"10.1016/j.cep.2024.110124","DOIUrl":"10.1016/j.cep.2024.110124","url":null,"abstract":"<div><div>A non-equilibrium phase transition model, grounded in the classical theory of droplet nucleation and growth, is constructed for the prediction of condensation phenomena in supersonic flows by coupling transport equations with source terms. The study investigates the influence of nozzle insulation on the spontaneous condensation of CO₂. Results show that the maximum supercooling in the non-insulated model is 6.3% higher than in the insulated model, which leads to earlier nucleation of gas in the non-insulated model. To investigate the impact of the condensation model on the gas expansion, a comparison is conducted between a single-phase flow model and a condensation flow model. The results indicate that the single-phase flow model neglects the latent heat released during condensation, leading to an overestimation of the flue gas expansion capacity inside the nozzle. The maximum deviation of the Mach number between the two models reaches 13%. Increasing inlet saturation from 0.172 to 0.222 results in a forward shift of the Wilson point and a decrease in the maximum nucleation rate from 1.3 × 10²² m^-3s^-1 to 5.2 × 10²¹ m^-3s^-1. However, the increase in saturation favors gas liquefaction, leading to a 34% increase in the maximum liquid fraction, from 0.065 to 0.087.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"208 ","pages":"Article 110124"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163818","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":"A novel ethyl acetate synthesis process with low energy consumption: Simulation optimization and experimental verification","authors":"Jie Xiao ,&nbsp;Ping An ,&nbsp;Hang Liu ,&nbsp;Mingming Ji ,&nbsp;Yuxin Wang ,&nbsp;Jinshou Fu ,&nbsp;Jenny Rizkiana ,&nbsp;Yang Li ,&nbsp;Guangwen Xu ,&nbsp;Lei Shi","doi":"10.1016/j.cep.2025.110199","DOIUrl":"10.1016/j.cep.2025.110199","url":null,"abstract":"<div><div>In response to the problem of high energy consumption in the synthesis of ethyl acetate using excess ethanol, we propose novel low-energy technology for synthesizing ethyl acetate using a considerable excess of acetic acid which saves 80 % energy. Extreme excess of acetic acid ensures the complete conversion of ethanol. The main component at the top of reaction distillation column is only the azeotrope of ethyl acetate and water, which can be easily separated via direct stratification. This process was systematically investigated by combining experiments and simulations. The process simulation is conducted based on the kinetic equation obtained by experiments. The effects of excess acetic acid, liquid holdup in the reboiler, number of theoretical plates, and reflux ratio on product distribution and energy consumption of the reaction distillation column were studied. Furthermore, the main process parameters of the ester purification column and the water-treatment column were optimized. The simulation results were well validated by pilot-scale experiments. Using three distillation columns and under the optimized conditions, the proposed process with a 15-fold excess of acetic acid, and using molecular sieve membrane for water removal from ester, an ethyl acetate purity of 99.999 wt% was achieved with a total energy consumption of 1120 kJ/kg.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"209 ","pages":"Article 110199"},"PeriodicalIF":3.8,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146065","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":"The separation characteristics of O/W emulsions in compact flotation unit enhanced by electrical flotation technology","authors":"Xiaolei Cai ,&nbsp;Yinghong Guo ,&nbsp;Shun Guan ,&nbsp;Duo Wang ,&nbsp;Huihui Han ,&nbsp;Yipeng Ji","doi":"10.1016/j.cep.2025.110195","DOIUrl":"10.1016/j.cep.2025.110195","url":null,"abstract":"<div><div>The widespread application of Enhanced Oil Recovery technology has led to a higher degree of oil phase emulsification and more robust stability in produced water, posing a severe challenge to the production water treatment process of offshore oil fields. Due to the limited space on offshore platforms, it is difficult to improve the oil removal rate by increasing the residence time of the processing device. Compact Flotation Unit, as an efficient oily wastewater treatment technology that is gradually being widely used on offshore platforms, exhibits limited effectiveness in removing emulsified oil droplets. Electric floatation technology is an effective method for the demulsification treatment of oil-water emulsions. To assess the feasibility of the electric floatation technology to strengthen the separation performance of CFU, the separation performance of CFU under different operating conditions and their impact on the lower limit of oil droplet Sauter mean diameter removal are researched, and the separation characteristics of electric flotation technology for O/W emulsions are analyzed. In particular, the effects of current density, electrode spacing, and number of electrode plates on the growth rate of oil droplet Sauter mean diameter, oil removal efficiency, and turbidity removal rate are analyzed. The experimental results shows that, for the O/W emulsion with an initial oil content of 500mg/L, the growth rate of oil droplet Sauter mean diameter can reach about 1.6, the oil droplet Sauter mean diameter can increase to 28.8μm, and the turbidity removal rate can go over 67.1 % under the electric field parameters of a current density of 180mA/cm² and a plate spacing of 15 mm by using the metal oxide-coated electrodes applying for 1 min. It indicates that applying current can effectively facilitate the coalescence of oil droplets, resulting in an increase in the Sauter mean diameter, thereby significantly improving the removal efficiency of CFU from tiny oil droplets.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"209 ","pages":"Article 110195"},"PeriodicalIF":3.8,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146068","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":"Synergistic approach to industrial wastewater treatment: Combining plasmolysis and microalgae cultivation","authors":"Muhammad Younas ,&nbsp;Fahad Rehman ,&nbsp;Sulaiman Al Zuhair ,&nbsp;Faisal Ahmed ,&nbsp;Muzamal Muzafar ,&nbsp;Ali Awad ,&nbsp;Maryam Asif ,&nbsp;Fahed Javed","doi":"10.1016/j.cep.2025.110198","DOIUrl":"10.1016/j.cep.2025.110198","url":null,"abstract":"<div><div>Microalgae cultivation offers a promising alternative to conventional wastewater treatment. However, microalgae cultivation is hindered in real wastewater treatment due to the high concentration of contaminates, complex organic compounds, and non-sterilization, which reduces microalgae growth. Therefore, the current hypothesis is to integrate plasmolysis and microalgae treatment for real textile wastewater (TWW) treatment, which can provide a sustainable approach to removing pollutants without adding harmful chemicals. The air plasma produced different oxidizing species, such as ozone, superoxide, atomic oxygen, and hydroxyl radical, capable of decomposing complex organic pollutants, dyes, and toxic compounds commonly found in TWW. This pre-treatment detoxifies the wastewater, making it safer for microalgae and reducing its color content and turbidity while enhancing light penetration. Hence, this study treats real TWW by integrating plasmolysis with microalgae technology. The results show that textile wastewater using plasmolysis reduces the 89.11 % color content in 20 min using air Corona-DBD plasma at 5 kV, 26 kHz, and 10 mA. Afterward, plasma-treated wastewater (OTWW) is introduced into the bioreactor for microalgae cultivation, and the results show a significant increase in microalgae growth in OTWW compared with TWW.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"209 ","pages":"Article 110198"},"PeriodicalIF":3.8,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147097","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":"Enhancing biofuel production with Co-pyrolysis of distiller's grains and waste polypropylene: synergistic effects and activation energy optimization with hybrid FLO-ENN approach","authors":"Nivedita Patel","doi":"10.1016/j.cep.2025.110194","DOIUrl":"10.1016/j.cep.2025.110194","url":null,"abstract":"<div><div>Biofuel production from renewable feedstocks is gaining significant attention due to the growing demand for sustainable energy solutions. This study proposes enhancing biofuel production through the co-pyrolysis of distiller's grains (DG) and waste polypropylene plastic (PP) using a hybrid FLO-ENN approach. The proposed approach is the joint execution of both the Frilled lizard Optimization (FLO) and Epistemic Neural Network (ENN). The main goal of this research is to improve the quality of biofuel production. The FLO algorithm is used to optimize the operational parameters to enhance the co-pyrolysis of DG and waste PP, while the ENN is employed to predict the quality of the biofuel. The proposed method is simulated using MATLAB to evaluate its performances and is compared with existing methods. The FLO-ENN approach achieves lower error as well as higher efficiency compared to existing techniques such as Particle Swarm Optimization (PSO), Progressive Depth Swarm-Evolution (PDSE) and Artificial Neural Network-Genetic Algorithm (ANN-GA). Also, the co-pyrolisis of DG and PP yields low activation energy of 44.82 kJ mol-1. This improvement demonstrates that the proposed framework has significant potential to optimize the pyrolysis of polymeric wastes and biomass feedstocks more effectively, providing more accurate results than previous optimization techniques.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"212 ","pages":"Article 110194"},"PeriodicalIF":3.8,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549955","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":"Research on Electro-enhanced wastewater biological treatment from 2000 to 2023: A review and bibliometric analysis","authors":"Yanbo Li ,&nbsp;Jen-Ping Chung ,&nbsp;Huai Shi","doi":"10.1016/j.cep.2025.110182","DOIUrl":"10.1016/j.cep.2025.110182","url":null,"abstract":"<div><div>The use of electro-technology for the biological treatment systems for wastewater represents a significant innovation in treatment efficiency and offers multiple advantages. This is a study of the methods, basic structures and progress of electrically enhanced biological treatment of wastewater. This study uses bibliometric analysis tools to search for 2,929 relevant papers in the Web of Science database from 2000 to 2023, to determine the evolution of knowledge structure in the field of electro-enhanced wastewater biological treatment (EEWBT). The research focus has shifted from basic wastewater treatments to the development of cutting-edge technologies that promote synchronous treatment and resource recovery. Future studies should focus on the optimization of bioreactors, in-depth mechanism studies and large-scale expansion of practical applications.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"209 ","pages":"Article 110182"},"PeriodicalIF":3.8,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143225546","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":"Effects of helical guide vanes on droplet behavior and separation performance in cyclone separators","authors":"Shuangcheng Fu ,&nbsp;Liang Tao ,&nbsp;Zhonghua Shen ,&nbsp;Minghui Xu ,&nbsp;Dong Yang ,&nbsp;Yue Hu ,&nbsp;Faqi Zhou","doi":"10.1016/j.cep.2025.110197","DOIUrl":"10.1016/j.cep.2025.110197","url":null,"abstract":"<div><div>In this study, a helical guide vane cyclone separator was developed to enhance the separation efficiency of escaped oil droplets during the treatment and recovery of waste drilling fluid. The internal flow field and liquid film behavior were analyzed through numerical simulations and validated by experiments. The results indicate that the helical guide vane significantly influences tangential velocity and pressure drop. At an intake speed of 15 m/s, the tangential velocity can be reduced by 12 % with 0.5 turns, while it can be increased by 20 % with 3 turns. Initially, the pressure drop decreases; however, as the number of vane turns increases, the pressure drop subsequently rises. The turns also reduce the spiral angle of the droplets, thereby improving the trapping efficiency of smaller droplets. When the number of helical guide vane turns is 2, the separation efficiency reaches its peak. Through further research, it has been found that the pitch has a significant effect on the pressure drop. As the pitch increases, the pressure drop decreases noticeably; however, the separation efficiency does not change significantly.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"209 ","pages":"Article 110197"},"PeriodicalIF":3.8,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143225539","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":"Research on ultrasonic demulsification characteristics and parameter optimization of condensate oil emulsion","authors":"Yuling Lü ,&nbsp;Shihao Zhu ,&nbsp;Ganggui Lin ,&nbsp;Meng Wang ,&nbsp;Ce Wang","doi":"10.1016/j.cep.2025.110185","DOIUrl":"10.1016/j.cep.2025.110185","url":null,"abstract":"<div><div>As natural gas wells advance through the mid to late stages of extraction, foam drainage processes are employed to sustain production capacity, leading to the formation of significant condensate emulsions. This study examines the effects of key factors on separation efficiency during ultrasonic dewatering of two representative condensate emulsions with varying viscosities, using single-factor and orthogonal experiments. The droplet size distribution was assessed using a microscopic observation system before and after demulsification. Results indicate that ultrasonic demulsification is an effective method for treating condensate emulsions and improving recovery rates. Optimal parameters were determined as 0.5 W/cm², 20 kHz, and a processing time of 20 mins, achieving complete dewatering (100 %) for separated oil samples alongside a notable separation efficiency of 83.1 %. Importantly, increases in sound intensity and processing time initially enhanced separation efficiency but subsequently led to a decline. Frequency exerted the most substantial influence on separation efficiency, followed by sound intensity, processing time had the least effect. Furthermore, under identical conditions, the first oil sample demonstrated a separation efficiency that was 17.4 % greater than that of the second sample. In practical terms, reducing emulsion viscosity can enhance ultrasonic separation efficiency.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"209 ","pages":"Article 110185"},"PeriodicalIF":3.8,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146066","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":"Photosensitization optimization in Chlorella: Driving the acclimation-enhanced degradation of sulfonamide antibiotics","authors":"Juxiang Chen,&nbsp;Sitong Lin,&nbsp;Chong Ruan,&nbsp;Lin Liu,&nbsp;Shangye Yang","doi":"10.1016/j.cep.2025.110196","DOIUrl":"10.1016/j.cep.2025.110196","url":null,"abstract":"<div><div>The proliferation of sulfonamide antibiotics (SAs) in aquatic ecosystems poses a severe threat to environmental integrity and human well-being. This research employs an acclimation strategy using Chlorella pyrenoidosas to enhance the photo-sensitized degradation efficacy of sulfamethoxazole (SMX) and sulfisoxazole (SIZ). The acclimated Chlorella exhibits remarkable degradation capabilities, with improvements of approximately 9.7 times for SMX and 4.2 times for SIZ, respectively, compared to non-acclimated strains. These improvements are linked to increased growth rates, higher chlorophyll levels, enhanced extracellular organic matter (EOM) production, and elevated antioxidant enzyme activities. The enhanced performance is attributed to refined enzymatic and metabolic processes promoting photosynthesis, energy conversion, and the degradation of SAs. Through response surface methodology, this approach is refined to achieve optimal water remediation results, attaining a degradation rate of 78.04 %. The EOM content increases by up to 68.33 %, while growth rates improve by 1.06 to 1.14 times, indicating superior tolerance. A biphasic response to antibiotic concentrations is also observed, where low concentrations facilitate degradation while high concentrations have an inhibitory effect. This characteristic is reflected by significant increases in antioxidant enzyme activities, particularly in the case of glutathione reductase (GR) and catalase (CAT) at concentrations below 1 mg/L.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"209 ","pages":"Article 110196"},"PeriodicalIF":3.8,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147083","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":"RSM-based process intensification for arabinoxylan and beta-glucan extraction from Brewer's spent grain using ultrasound and microwave-assisted technologies","authors":"Ebenezer Ola Falade ,&nbsp;Kouadio Jean Eric-Parfait Kouamé ,&nbsp;Yunyun Zheng ,&nbsp;Yanyun Zhu ,&nbsp;Afusat Yinka Aregbe ,&nbsp;Xingqian Ye","doi":"10.1016/j.cep.2025.110178","DOIUrl":"10.1016/j.cep.2025.110178","url":null,"abstract":"<div><div>This study optimized the extraction of soluble dietary fibers (SDF) from Brewer's Spent Grain (BSG) using ultrasound and microwave-assisted alkali extraction (UMAK) with Response Surface Methodology (RSM). The UMAK method demonstrated superior efficiency, yielding higher arabinoxylan (34.2 %) and beta-glucan (19.14 %) content compared to ultrasound-assisted alkali extraction (USAK), despite a slightly lower total SDF yield (39.74 % vs. 40.8 %). UMAK significantly reduced extraction time (16.25 vs. 60 min, <em>p</em> &lt; 0.001), achieving efficient solubilization while preserving polysaccharide structures, as confirmed by FTIR analysis. The retention of hydroxyl groups and structural integrity highlights UMAK's potential for producing high-quality dietary fibers, offering industrial relevance for functional food applications.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"209 ","pages":"Article 110178"},"PeriodicalIF":3.8,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146067","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}