Chemical Engineering and Processing - Process Intensification最新文献_第6页

Sustainable valorization of distillers’ grains: Intensified extraction and modification strategies for functional fiber development 酒糟的可持续增值：功能性纤维开发的强化提取和改性策略

IF 3.9 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2026-02-01 Epub Date: 2025-12-24 DOI: 10.1016/j.cep.2025.110679

Kouadio Jean Eric-Parfait Kouamé , Ebenezer Ola Falade , Yanyun Zhu , Yunyun Zheng , Ishtiaq Ahmad , Bingge Liu , Ibourahema Coulibaly , Xingqian Ye

{"title":"Sustainable valorization of distillers’ grains: Intensified extraction and modification strategies for functional fiber development","authors":"Kouadio Jean Eric-Parfait Kouamé , Ebenezer Ola Falade , Yanyun Zhu , Yunyun Zheng , Ishtiaq Ahmad , Bingge Liu , Ibourahema Coulibaly , Xingqian Ye","doi":"10.1016/j.cep.2025.110679","DOIUrl":"10.1016/j.cep.2025.110679","url":null,"abstract":"<div><div>Hemicellulose-rich insoluble dietary fibers (IDFs) derived from distillers’ grains of wheat, sorghum, and corn offer considerable potential as health-promoting ingredients. However, their properties depend on extraction and modification methods. This study compared conventional (ultrasound-UAE, microwave-MAE, and alkali-assisted-AK) and intensified hybrid methods, focusing on microwave–alkaline (MK) and ultrasound–microwave–alkaline (UMK) treatments and their enzymatic variants (MMK and MUMK). These integrated strategies combined mechanical, thermal, and biochemical actions to optimize fiber architecture and functionality. Intensified processes enhanced porosity, hydrophilicity, and surface reactivity, leading to superior hydration, adsorption, and probiotic performance. MUMK showed the highest water-holding capacity (4.95 g/g; +101 % vs DGs) and functionality (GFI = 78 %), while UMK exhibited the greatest cholesterol adsorption (36.07 mg/g) and pH stability (pH7/pH2 = 2.46). Biologically, intensified treatments improved <em>Lactobacillus acidophilus</em> growth and adhesion, with MK showing the best fermentation efficiency (AUC = 41.11 OD·h) and MMK reaching 85.96 % adhesion. These findings demonstrate that coupling mechanical disruption, alkaline hydrolysis, and enzymatic depolymerization enhances reactive sites and probiotic–fiber interactions. Overall, MK, UMK, MMK, and MUMK effectively convert distillers’ grains into multifunctional IDFs with balanced hydration, lipid-binding, and probiotic-supporting properties, providing a sustainable valorization route aligned with SDG 12 (Responsible Consumption and Production).</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"220 ","pages":"Article 110679"},"PeriodicalIF":3.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837815","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

An integrated RSM–NSGA-II approach for optimizing bioethanol production from sago pith waste via supercritical water hydrolysis: An energy, economic, and environmental perspective 综合RSM-NSGA-II方法通过超临界水水解优化西米髓废物生产生物乙醇：能源，经济和环境的角度

IF 3.9 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2026-02-01 Epub Date: 2025-12-17 DOI: 10.1016/j.cep.2025.110660

Saravana Kannan Thangavelu , Ping Ping Chung , Muhammad Rafiq Mirza Bin Julaihi , Kumar Perumal , Abu Saleh Ahmed

{"title":"An integrated RSM–NSGA-II approach for optimizing bioethanol production from sago pith waste via supercritical water hydrolysis: An energy, economic, and environmental perspective","authors":"Saravana Kannan Thangavelu , Ping Ping Chung , Muhammad Rafiq Mirza Bin Julaihi , Kumar Perumal , Abu Saleh Ahmed","doi":"10.1016/j.cep.2025.110660","DOIUrl":"10.1016/j.cep.2025.110660","url":null,"abstract":"<div><div>This study presents an integrated approach combining Response Surface Methodology (RSM) and the Non-dominated Sorting Genetic Algorithm II (NSGA-II) to optimize bioethanol production from sago pith waste (SPW) via supercritical water hydrolysis (SCWH). A Box–Behnken design evaluated the influence of temperature (360–400 °C), reaction time (10–20 min), and biomass loading (5–10% w/v) on sugar and ethanol yields. The quadratic RSM models for sugar and ethanol yield showed high accuracy (R<sup>2</sup> = 0.9764 and 0.9642, respectively) with significant model terms (p < 0.0001). Optimal SCWH conditions (380 °C, 12 min, 8% SPW) resulted in a sugar yield of 71.2 <em>g</em>/100 <em>g</em> SPW and ethanol concentration of 31.2 <em>g</em>/L, achieving 86.3% fermentation efficiency with minimal inhibitor formation (3.96 <em>g</em>/L). NSGA-II enabled multi-objective optimization considering ethanol yield, energy consumption, and severity factor (log Ro ≈ 4.34), identifying energy-efficient conditions (3.82 kWh/kg ethanol). Techno-economic analysis estimated a production cost of ∼$0.83/L ethanol with 12–30% profit margin. Green metrics indicated moderate sustainability with an E-factor of 8.06 and GHG emissions of ∼1.7 kg CO₂-eq/kg ethanol. The integrated RSM–NSGA-II framework demonstrates a scalable and eco-efficient pathway for valorizing SPW into renewable bioethanol.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"220 ","pages":"Article 110660"},"PeriodicalIF":3.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837855","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 insoluble particles as nucleation cores on the condensation flow of water vapor in a supersonic separator 不溶性颗粒作为成核核对超声速分离器中水蒸气凝结流动的影响

IF 3.9 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2026-02-01 Epub Date: 2025-12-20 DOI: 10.1016/j.cep.2025.110666

Weiwei Xu, Shengxiao Li, Xinyu Wang, Fuhao Wang, Bingyang Peng

{"title":"Effect of insoluble particles as nucleation cores on the condensation flow of water vapor in a supersonic separator","authors":"Weiwei Xu, Shengxiao Li, Xinyu Wang, Fuhao Wang, Bingyang Peng","doi":"10.1016/j.cep.2025.110666","DOIUrl":"10.1016/j.cep.2025.110666","url":null,"abstract":"<div><div>Supersonic separators, which utilize pressure energy to remove water vapor from natural gas, are characterized by their high efficiency and energy-efficient operation. However, the existing analysis of the condensation flow in it fails to fully consider the influence of the surface properties of the impurity particles. This study develops a two-fluid simulation framework that incorporates particle surface energy. The framework is used to evaluate how particle parameters affect condensation performance and pressure drop. The results show that particle surface wettability, radius and concentration have significant effects on the condensation and pressure loss. A 37.32% enhancement in liquid content at the discharge port was observed when the particle contact angle was reduced. The influence of particle contact angle on condensation varies with particle size and concentration: smaller radii amplify its impact, whereas lower particle counts enhance its significance. A dimensionless number, the coefficient of condensation pressure loss <em>γ<sub>c</sub></em>, is proposed to characterize the magnitude of pressure loss due to condensation. The analysis shows that <em>γ<sub>c</sub></em> increases with the increase of contact angle, and that <em>γ<sub>c</sub></em> decreases by 32.46% when <em>N<sub>p</sub></em> decreases from 1 × 10<sup>17</sup> /m<sup>3</sup> to 1 × 10<sup>14</sup> /m3; by 24.72% when <em>r<sub>p</sub></em> decreases from 1 × 10<sup>–9</sup> m to 1 × 10<sup>–7</sup> m.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"220 ","pages":"Article 110666"},"PeriodicalIF":3.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145838174","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

Process modelling for sustainable production of bio-oil from waste biomass 从废弃生物质中可持续生产生物油的过程建模

IF 3.9 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2026-02-01 Epub Date: 2025-12-27 DOI: 10.1016/j.cep.2025.110683

Panayiota Adamou , Eleana Harkou , Lukas Jasiunas , Rozalia Persiani , María José Valero-Romero , Ramiro Ruiz-Rosas , Valerio Natale , Savvas Kamenos , Andreas Andreou , George Manos , S.M. Al-Salem , Robert Wojcieszak , Nikolaos Dimitratos , Achilleas Constantinou

{"title":"Process modelling for sustainable production of bio-oil from waste biomass","authors":"Panayiota Adamou , Eleana Harkou , Lukas Jasiunas , Rozalia Persiani , María José Valero-Romero , Ramiro Ruiz-Rosas , Valerio Natale , Savvas Kamenos , Andreas Andreou , George Manos , S.M. Al-Salem , Robert Wojcieszak , Nikolaos Dimitratos , Achilleas Constantinou","doi":"10.1016/j.cep.2025.110683","DOIUrl":"10.1016/j.cep.2025.110683","url":null,"abstract":"<div><div>The use of bio-based feedstocks is necessary, since industries still rely on fossil fuels or food-competitive feedstocks. Aim of this work is the design of an integrated process consisting of liquefaction and pyrolysis processes that use waste biomass for the production of biopolyol and biophenolic compounds for bio-based polyurethane (PU) and phenol-formaldehyde (PF) materials production. Aspen Plus models were developed using power-law kinetics for the pyrolysis process, validating literature-based results, with maximum error of 10 % showcasing the good predictability of the power-law kinetics. The integrated liquefaction and pyrolysis process was then modelled based on our experimental results, showing 77 % biopolyols yield after liquefaction and 59 % bio-oil yield after pyrolysis, which consisted of approximately 2.3 % phenols from the compounds detected. The modelling of components distribution of the bio-oil had a maximum error of 13 %. Lastly, an energy optimisation study was conducted in Aspen Plus, utilising the hot outlet stream from pyrolysis to heat the feedstock before entering the pre-heating step, reducing in that way the heating load of the heater by 13 kW. Future studies aim on a more detailed integrated liquefaction-pyrolysis process flow diagram to perform techno-economical and life-cycle analysis for the generation of bio-oil rich in biopolyols and phenolics.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"220 ","pages":"Article 110683"},"PeriodicalIF":3.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880885","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

High-efficiency synthesis and separation of glyoxylic acid based on reaction-extraction coupling method in a microreactor 基于反应萃取耦合法的微反应器中乙醛酸的高效合成与分离

IF 3.9 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2026-02-01 Epub Date: 2025-12-26 DOI: 10.1016/j.cep.2025.110681

Han Wang , Hongwei Cui , Junnan Wang , George UGWU Kenechukwu , Sehar Muzaffar Hussain , Chunying Zhu , Youguang Ma , Taotao Fu

{"title":"High-efficiency synthesis and separation of glyoxylic acid based on reaction-extraction coupling method in a microreactor","authors":"Han Wang , Hongwei Cui , Junnan Wang , George UGWU Kenechukwu , Sehar Muzaffar Hussain , Chunying Zhu , Youguang Ma , Taotao Fu","doi":"10.1016/j.cep.2025.110681","DOIUrl":"10.1016/j.cep.2025.110681","url":null,"abstract":"<div><div>To improve the yield of glyoxylic acid, a capillary microreactor system based on the reaction-extraction coupling method was developed. The process of liquid-liquid two-phase flow was simulated using CFD simulation to investigate the effects of flow velocity ratio of two phases and total flow velocity on the droplet length. The effects of factors such as the injection point and concentration of the extractant, volumetric ratio of two phases, and total flow rate on the reaction, were investigated. When the molar ratio of nitric acid (35 wt %), glyoxal (40 wt %), and sodium nitrite was 1.4:1:0.15, temperature was 68 °C, diameter and length of tube were 0.8 mm and 36 m, the extractant Tri-n-octylamine at a volume fraction of 50 % added at 24 m, volumetric ratio of extraction to reaction phase was 1:1, and total flow rate was 2.76 mL/min, a glyoxal conversion of 97.43 % and a glyoxylic acid yield of 86.88 % were obtained. This reaction-extraction coupling method fully exploits the characteristics of process intensification within a capillary microreactor to accomplish simultaneous reaction and separation. By minimizing side reactions, it significantly improves the yield of glyoxylic acid and simplifies subsequent purification steps, exhibiting high efficiency, environmental friendliness through reduced solvent usage and lower energy consumption, and suitability for continuous production.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"220 ","pages":"Article 110681"},"PeriodicalIF":3.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880884","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

Energy-efficient design of extractive distillation for benzene–cyclohexane–cyclohexene using molecular simulation and multi-objective optimization 基于分子模拟和多目标优化的苯-环己烷-环己烯萃取精馏节能设计

IF 3.9 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2026-02-01 Epub Date: 2025-12-16 DOI: 10.1016/j.cep.2025.110663

Fengzhi Li , Yulong Li , Yang Xiao, Zhiwei Zhang, Yan Wang, Wangfeng Cai

{"title":"Energy-efficient design of extractive distillation for benzene–cyclohexane–cyclohexene using molecular simulation and multi-objective optimization","authors":"Fengzhi Li , Yulong Li , Yang Xiao, Zhiwei Zhang, Yan Wang, Wangfeng Cai","doi":"10.1016/j.cep.2025.110663","DOIUrl":"10.1016/j.cep.2025.110663","url":null,"abstract":"<div><div>In benzene hydrogenation, benzene, cyclohexane, and cyclohexene form a ternary azeotrope with close boiling points, making separation energy-intensive and underscoring the need for sustainable strategies. This study applies a comprehensive extractive distillation framework that integrates molecular-level entrainer screening, process intensification, and multi-objective optimization, thereby providing a unified platform to evaluate and compare advanced intensified configurations. Ethylene glycol was identified as the optimal entrainer through COSMO-SAC-based molecular analysis and relative volatility evaluation. To improve separation performance, five intensified configurations were systematically explored, incorporating heat integration, intermediate reboilers, and heat pump assistance either individually or in combination. A multi-objective optimization framework based on the NSGA-III algorithm was applied to minimize total annual cost (TAC) and greenhouse gas emissions, while the TOPSIS method was employed to determine the most favorable trade-off solution from the Pareto front. The hybrid configuration combining all three intensification strategies achieved the best overall performance, reducing TAC by 25.3 % and emissions by 37.8 %. This work demonstrates the novelty and synergy of combining quantum chemistry-guided solvent selection, multi-criteria optimization, and hybrid intensification strategies. The proposed framework not only enables low-emission separation of complex ternary azeotropes but also offers a transferable methodology applicable to a wide range of industrial systems.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"220 ","pages":"Article 110663"},"PeriodicalIF":3.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145788968","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 optimization of a short-path distillation of alcoholic extracts from hemp 大麻醇提物短程蒸馏工艺的实验优化

IF 3.9 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2026-02-01 Epub Date: 2025-12-14 DOI: 10.1016/j.cep.2025.110658

Oscar Y. Buitrago-Suescún , Carlos Martínez-Riascos , Alvaro Orjuela

{"title":"Experimental optimization of a short-path distillation of alcoholic extracts from hemp","authors":"Oscar Y. Buitrago-Suescún , Carlos Martínez-Riascos , Alvaro Orjuela","doi":"10.1016/j.cep.2025.110658","DOIUrl":"10.1016/j.cep.2025.110658","url":null,"abstract":"<div><div>Short-path vacuum distillation is a key step for the recovery of high purity cannabinoids from cannabis extracts. Although the technique is readily available, it requires strict control to ensure efficient solvent recovery, high purity of terpene and cannabinoid fractions, minimal thermal degradation, and reduced energy use. This study presents an experimental optimization of short-path distillation for cannabis extracts using a simplex design. Ethanolic extracts from a non-psychoactive cannabis variety grown in Colombia were processed to maximize cannabidiol (CBD) and cannabinoids concentration and yield. Operating variables of the short-path distillation process included pressure (< 20 kPa), heating ramp (0.5–1.5 ºC/min), and Vigreux column length expressed as the number of indentations (2–4). Optimal conditions were reached after seven experiments, and they corresponded to a working pressure of 1.33 kPa, a heating rate of 1 °C/min, and using 3 rows of Vigreux points. Under these conditions, it was found that, by processing an ethanolic extract containing 3.6 wt.% CBD and 0.2 wt.% THC, it was possible to reach a 97% recovery of CBD, a total recovery of cannabinoids of 95%, with a distillate containing nearly 90 wt.% CBD. Obtained results could be used for further process modeling and development of optimal control strategies.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"220 ","pages":"Article 110658"},"PeriodicalIF":3.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145789025","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

Process intensification of multistage freeze desalination for high-salinity brines utilizing LNG cryogenic energy: Advancing the water-energy nexus 利用LNG低温能强化高盐度盐水多级冷冻脱盐工艺：推进水能联系

IF 3.9 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2026-02-01 Epub Date: 2025-12-24 DOI: 10.1016/j.cep.2025.110677

Parul Sahu , Rutvi Khakhar , Bhargav B. Joshi , Hemali Masani

{"title":"Process intensification of multistage freeze desalination for high-salinity brines utilizing LNG cryogenic energy: Advancing the water-energy nexus","authors":"Parul Sahu , Rutvi Khakhar , Bhargav B. Joshi , Hemali Masani","doi":"10.1016/j.cep.2025.110677","DOIUrl":"10.1016/j.cep.2025.110677","url":null,"abstract":"<div><div>Water and energy are interlinked resources vital to development. As desalination grows to meet water demand, energy-efficient methods lag. This research explores a process-intensified freezing-based desalination of high-salinity brines, utilizing cryogenic energy from regasification of liquefied natural gas to enhance efficiency and sustainability. Experimental studies were performed using a jacketed cylindrical crystallizer to investigate the impact of brine salinity (3–10 wt% total dissolved solids) on ice formation, water recovery, and product quality. These findings, combined with analysis of liquefied natural gas regasification processes and thermo-physical properties, informed the design of a multi-stage freeze desalination system. The intrinsic cold energy of liquefied natural gas is repurposed for brine cooling and ice crystallization, thereby eliminating the need for conventional refrigeration systems and enhancing overall energy efficiency. A case study was conducted to desalinate a 5 wt% feed brine using a three-stage freeze desalination system integrated with liquefied natural gas cryogenic energy. Material and energy balances confirmed that the available refrigeration load in liquefied natural gas is sufficient to drive freeze desalination. An overall product water recovery of 50% and a desalination efficiency of 96% were achieved, corresponding to the recovery of 0.4 tons of product water per ton of regasified liquefied natural gas. The integration of cryogenic energy of liquefied natural gas into the desalination workflow exemplifies process intensification by enabling energy-efficient treatment of hypersaline waste streams through synergistic energy recovery and system integration.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"220 ","pages":"Article 110677"},"PeriodicalIF":3.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145881279","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

Simultaneous magnetization and activation as a facile way to improve the adsorption capacity of walnut shell biochars for anionic azo dyes 同时磁化活化是提高核桃壳生物炭对阴离子偶氮染料吸附能力的一种简便方法

IF 3.9 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2026-02-01 Epub Date: 2025-12-29 DOI: 10.1016/j.cep.2025.110686

Gayeon Kim , Jaeyeong Choi , Jaegwan Shin , Jinwoo Kwak , Kangmin Chon

{"title":"Simultaneous magnetization and activation as a facile way to improve the adsorption capacity of walnut shell biochars for anionic azo dyes","authors":"Gayeon Kim , Jaeyeong Choi , Jaegwan Shin , Jinwoo Kwak , Kangmin Chon","doi":"10.1016/j.cep.2025.110686","DOIUrl":"10.1016/j.cep.2025.110686","url":null,"abstract":"<div><div>This study investigated the effects of magnetization and simultaneous magnetization and activation (SMA) on the adsorption of the azo dyes (i.e., Congo red (CR) and amaranth (AM)) by walnut shell biochars (WSB). SMA-modified walnut shell biochar (WSB<sub>SMA</sub>) has a larger specific surface area (626.2 m²/g) than that of WSB (9.4 m²/g) and magnetized WSB (WSB<sub>M</sub>; 482.6 m²/g) because ZnCl<sub>2</sub> inhibited tar formation during pyrolysis. Consequently, WSB<sub>SMA</sub> showed superior adsorption capacities (Q<sub>max</sub> = 8.13–13.25 mg/g) compared to WSB (Q<sub>max</sub> = 0.44–1.65 mg/g) and WSB<sub>M</sub> (Q<sub>max</sub> = 7.70–12.95 mg/g). The pseudo-second-order and Langmuir models better described the adsorption kinetics and isotherm, suggesting that chemisorption primarily governs the adsorption process. The EDS and XPS analyses revealed that CR and AM adsorption onto WSB, WSB<sub>M</sub>, and WSB<sub>SMA</sub> was mainly governed by π-π electron-donor-acceptor interaction. In the case of WSB<sub>M</sub> and WSB<sub>SMA</sub>, electrostatic interaction was additionally involved in the adsorption of CR and AM due to the presence of iron oxides, resulting in higher removal efficiencies compared to WSB. Furthermore, WSB<sub>SMA</sub> maintained excellent reusability (reuse efficiencies ≥ 60 %) after six adsorption-desorption cycles. Therefore, SMA is considered a viable approach to enhance the adsorption capacity of CR and AM onto WSB.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"220 ","pages":"Article 110686"},"PeriodicalIF":3.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922073","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

Optimization and experimental study on uniform distributor in powder metallurgy process 粉末冶金均匀布料器的优化与试验研究

IF 3.9 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2026-02-01 Epub Date: 2025-12-18 DOI: 10.1016/j.cep.2025.110664

Ge Zhang, Fuyong Su, Yumeng Li, Lixuan Cao, Jun Chen

{"title":"Optimization and experimental study on uniform distributor in powder metallurgy process","authors":"Ge Zhang, Fuyong Su, Yumeng Li, Lixuan Cao, Jun Chen","doi":"10.1016/j.cep.2025.110664","DOIUrl":"10.1016/j.cep.2025.110664","url":null,"abstract":"<div><div>In some small-scale powder metallurgy scenarios, uneven powder distribution during discharging due to the lack of a distributor affects the density and uniformity of green compacts in subsequent pressing, thereby impacting product quality and performance. To address this issue, a non-powered distributor with a two-stage distributor was designed. The influence of structural parameters on distribution uniformity was investigated by improving the distributor structure and establishing a discrete element simulation model, using material surface accumulation, particle diameter distribution, and porosity as evaluation indicators. The improvement effect of the distributor on powder distribution uniformity was verified by comparing working conditions with and without the distributor. Results indicated that adding the distributor effectively improved uneven particle diameter distribution, with optimal uniformity achieved when the sliding arm inclination angle was 20° To further verify applicability, the 30° distributor, 25° distributor and 20° distributor were used to conduct distribution experiments. Compared with the condition without a distributor, the 20° distributor improved powder distribution uniformity by 33.33%, resulting in more uniform spatial distribution of particle diameters and stress in the mixture.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"220 ","pages":"Article 110664"},"PeriodicalIF":3.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837856","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