Pub Date : 2026-02-06DOI: 10.1021/acs.iecr.5c04226
Yunxiang Luo, Tongtong Zhang, Yang Qin, Fujie Zhao, Hongchen Wang, Guohua Liu, Lu Qi
Bisphenol A (BPA), an emerging wastewater contaminant, poses significant ecological risks even in trace concentrations, necessitating advanced removal strategies. In this study, a novel γ-Fe2O3-embedded nitrogen-doped polydopamine-derived carbon composite adsorbent (Fe-PC) was synthesized using polydopamine as a self-nitrogen-doped carbon precursor rather than a conventional shell material. The Fe-PC adsorbent exhibited a high BPA adsorption capacity of 423.86 mg g–1 and rapid equilibrium within 120 min. Adsorption kinetics followed a pseudo-second-order model (R2 = 0.999), while equilibrium data aligned with the Langmuir isotherm, indicating monolayer chemisorption is the dominant mechanism. Thermodynamic analysis confirmed that the process is spontaneous and endothermic. Mechanistic investigations revealed that γ-Fe2O3 introduces abundant active sites, enabling synergistic adsorption via chemical bonding, π–π interactions, hydrophobic interactions, and Fe3+ coordination with BPA hydroxyl groups. Combining high adsorption capacity, rapid kinetics, and stability, Fe-PC offers a promising strategy for efficiently removal of emerging contaminants from water.
{"title":"A γ-Fe2O3 Embedded In Situ Nitrogen-Doped Carbon Composites for Efficient Bisphenol A Removal: Adsorption Behavior and Property Study","authors":"Yunxiang Luo, Tongtong Zhang, Yang Qin, Fujie Zhao, Hongchen Wang, Guohua Liu, Lu Qi","doi":"10.1021/acs.iecr.5c04226","DOIUrl":"https://doi.org/10.1021/acs.iecr.5c04226","url":null,"abstract":"Bisphenol A (BPA), an emerging wastewater contaminant, poses significant ecological risks even in trace concentrations, necessitating advanced removal strategies. In this study, a novel γ-Fe<sub>2</sub>O<sub>3</sub>-embedded nitrogen-doped polydopamine-derived carbon composite adsorbent (Fe-PC) was synthesized using polydopamine as a self-nitrogen-doped carbon precursor rather than a conventional shell material. The Fe-PC adsorbent exhibited a high BPA adsorption capacity of 423.86 mg g<sup>–1</sup> and rapid equilibrium within 120 min. Adsorption kinetics followed a pseudo-second-order model (<i>R</i><sup>2</sup> = 0.999), while equilibrium data aligned with the Langmuir isotherm, indicating monolayer chemisorption is the dominant mechanism. Thermodynamic analysis confirmed that the process is spontaneous and endothermic. Mechanistic investigations revealed that γ-Fe<sub>2</sub>O<sub>3</sub> introduces abundant active sites, enabling synergistic adsorption via chemical bonding, π–π interactions, hydrophobic interactions, and Fe<sup>3+</sup> coordination with BPA hydroxyl groups. Combining high adsorption capacity, rapid kinetics, and stability, Fe-PC offers a promising strategy for efficiently removal of emerging contaminants from water.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"58 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146121899","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}
The accelerated progression of portable and wearable electronics has given rise to a substantial demand for flexible electrode materials that exhibit exceptional electrochemical performance. Herein, we propose an interfacial engineering strategy to construct NiMn-layered double hydroxide@metal–organic framework (NiMn-LDH@MOF) heterostructures on carbon cloth via an integrated electrodeposition-hydrothermal in situ conversion approach. The LDH phase simultaneously serves as both a metal source and structural template, enabling oriented MOF growth through coordination with 1,3,5-benzene tricarboxylic acid ligands. This heterostructure integrates abundant active sites, efficient electron transport pathways, and enhanced redox activity, collectively boosting electrochemical performance. Density functional theory calculations have been used to verify that the heterostructure significantly reduces the bandgap and enhances the adsorption energy for OH–, thus improving the reaction kinetics. The electrode delivers 1432 F g–1 at 0.5 A g–1, retaining 84.11% capacity after 5000 cycles. Ex situ characterization elucidates the charge storage mechanism and structural evolution during cycling. A flexible asymmetric solid-state supercapacitor assembled with this electrode delivers 298 F g–1 at 0.5 A g–1 and 105.9 Wh kg–1 at 399 W kg–1. This work highlights the synergistic effects between LDH and MOF in heterostructures, offering a novel strategy for developing high-performance supercapacitors.
便携式和可穿戴电子产品的加速发展已经引起了对具有优异电化学性能的柔性电极材料的大量需求。在此，我们提出了一种界面工程策略，通过集成电沉积-热液原位转换方法在碳布上构建nimn层双hydroxide@metal -有机骨架（NiMn-LDH@MOF）异质结构。LDH相同时作为金属源和结构模板，通过与1,3,5-苯三羧酸配体配合，实现定向MOF的生长。这种异质结构集成了丰富的活性位点、高效的电子传递途径和增强的氧化还原活性，共同提高了电化学性能。密度泛函理论计算证实了异质结构显著减小了带隙，提高了OH -的吸附能，从而改善了反应动力学。电极在0.5 A g-1下提供1432 F g-1，在5000次循环后保持84.11%的容量。非原位表征阐明了循环过程中的电荷储存机制和结构演变。用该电极组装的柔性非对称固态超级电容器在0.5 A g-1下可提供298 F - 1，在399 W kg-1下可提供105.9 Wh kg-1。这项工作强调了异质结构中LDH和MOF之间的协同效应，为开发高性能超级电容器提供了一种新的策略。
{"title":"Dual-Function Layered Double Hydroxide Simultaneously Serving as Metal Source and Template to Guide Oriented Metal–Organic Framework In Situ Growth for High-Performance Flexible Supercapacitor Electrodes","authors":"Bo Li, Rui Zhao, Hao Yue, Yu Zhang, Zhe Zhang, Jiqiong Jiang, Wei Shang, Yuqing Wen","doi":"10.1021/acs.iecr.5c04610","DOIUrl":"https://doi.org/10.1021/acs.iecr.5c04610","url":null,"abstract":"The accelerated progression of portable and wearable electronics has given rise to a substantial demand for flexible electrode materials that exhibit exceptional electrochemical performance. Herein, we propose an interfacial engineering strategy to construct NiMn-layered double hydroxide@metal–organic framework (NiMn-LDH@MOF) heterostructures on carbon cloth via an integrated electrodeposition-hydrothermal in situ conversion approach. The LDH phase simultaneously serves as both a metal source and structural template, enabling oriented MOF growth through coordination with 1,3,5-benzene tricarboxylic acid ligands. This heterostructure integrates abundant active sites, efficient electron transport pathways, and enhanced redox activity, collectively boosting electrochemical performance. Density functional theory calculations have been used to verify that the heterostructure significantly reduces the bandgap and enhances the adsorption energy for OH<sup>–</sup>, thus improving the reaction kinetics. The electrode delivers 1432 F g<sup>–1</sup> at 0.5 A g<sup>–1</sup>, retaining 84.11% capacity after 5000 cycles. Ex situ characterization elucidates the charge storage mechanism and structural evolution during cycling. A flexible asymmetric solid-state supercapacitor assembled with this electrode delivers 298 F g<sup>–1</sup> at 0.5 A g<sup>–1</sup> and 105.9 Wh kg<sup>–1</sup> at 399 W kg<sup>–1</sup>. This work highlights the synergistic effects between LDH and MOF in heterostructures, offering a novel strategy for developing high-performance supercapacitors.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"288 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146121901","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}
Pub Date : 2026-02-06DOI: 10.1021/acs.iecr.5c04369
Santiago N. Fleite, Balbi María del Pilar, Mauricio Maestri, Miryan Cassanello, María Angélica Cardona, Daniel Hojman, Héctor Somacal
The motion of solid aggregates (flocs) in a settler is crucial for the sedimentation efficiency. While the liquid flow patterns have been examined to model sedimentation, the effects arising from the liquid–solid suspension are less explored. Experimentally assessing the floc movements is difficult due to the inherent opacity of the media. This work aims to determine floc trajectories in a lamellar settler using radioactive particle tracking (RPT) and compare the results with those of computational fluid dynamics (CFD) simulations. A bank-scale unit already tested for a feedlot wastewater treatment process was used for the experiments. The free motion of a tracer representing the flocs was determined with the aid of a set of scintillation detectors using a simplified RPT methodology recently proposed. Experimental and simulated trajectories were compared through the Jensen–Shannon divergence, indicating that they are statistically indistinguishable. Floc settlement times estimated from the simulations overestimate the experimental values for the liquid flow rate used for the design. For double the design flow rate, the sedimentation time increases, and the estimated values are fairly coincident. The solid sediments act as a velocity buffer, stabilizing the flow and damping eddy formation, thus increasing the tolerance to high flow rates and abrupt hydraulic changes. Results highlight the importance of combining trajectory tracking with simulations to analyze floc motion, offering new insights into the design and operation of lamellar settlers.
{"title":"Liquid and Floc Trajectories in a Lamellar Settler: Simulations and Comparison with RPT Experimental Results in a Solid–Liquid Suspension System","authors":"Santiago N. Fleite, Balbi María del Pilar, Mauricio Maestri, Miryan Cassanello, María Angélica Cardona, Daniel Hojman, Héctor Somacal","doi":"10.1021/acs.iecr.5c04369","DOIUrl":"https://doi.org/10.1021/acs.iecr.5c04369","url":null,"abstract":"The motion of solid aggregates (flocs) in a settler is crucial for the sedimentation efficiency. While the liquid flow patterns have been examined to model sedimentation, the effects arising from the liquid–solid suspension are less explored. Experimentally assessing the floc movements is difficult due to the inherent opacity of the media. This work aims to determine floc trajectories in a lamellar settler using radioactive particle tracking (RPT) and compare the results with those of computational fluid dynamics (CFD) simulations. A bank-scale unit already tested for a feedlot wastewater treatment process was used for the experiments. The free motion of a tracer representing the flocs was determined with the aid of a set of scintillation detectors using a simplified RPT methodology recently proposed. Experimental and simulated trajectories were compared through the Jensen–Shannon divergence, indicating that they are statistically indistinguishable. Floc settlement times estimated from the simulations overestimate the experimental values for the liquid flow rate used for the design. For double the design flow rate, the sedimentation time increases, and the estimated values are fairly coincident. The solid sediments act as a velocity buffer, stabilizing the flow and damping eddy formation, thus increasing the tolerance to high flow rates and abrupt hydraulic changes. Results highlight the importance of combining trajectory tracking with simulations to analyze floc motion, offering new insights into the design and operation of lamellar settlers.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"40 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146121900","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}
Pub Date : 2026-02-06DOI: 10.1021/acs.iecr.5c03843
Miaosi Li, Nan Nan, Ebrahim Sharaf Aldeen, Yang Fu, Lei Bao
Heightened concerns over perfluoroalkyl and polyfluoroalkyl substances (PFAS) have intensified the demand for cost-effective, rapid, and sensitive detection technologies. Carbon nanodots (C-dots), as emerging metal-free quantum dots, show strong potential for environmental sensing; however, their integration into solid-state platforms for PFAS detection remains limited. Here, we present a droplet-mode electrochemical impedance spectroscopy (EIS) platform that leverages liquid–liquid phase separation (LLPS) to direct the self-assembly of C-dots into mesoporous architectures on flexible indium tin oxide electrodes. By formulating ternary microdroplets and tracking their evaporation in situ, we capture intermediate LLPS states that control the pore morphology, with porosity aligning closely with theoretical predictions from ternary phase diagrams. These mesoporous electrodes exhibit enhanced PFAS adsorption and charge-transfer modulation, enabling a strong impedance response. The sensor achieves a detection limit of 2 ppb for perfluorooctanoic acid (PFOA) in spiked tap water and operates within a linear range of 10–200 ppb, all without sample pretreatment. Furthermore, as confirmed by theoretical and experimental analysis, the platform is adaptable to longer-chain PFAS, such as perfluorodecanoic acid (PFDA). This simple and tunable LLPS-based strategy offers a new route to engineer nanocarbon architectures for solid-state sensing and facilitates point-of-need monitoring of persistent environmental contaminants.
{"title":"Mesoporous Carbon Dot Architectures via Liquid–Liquid Phase Separation for Droplet-Mode Impedance Sensing of PFAS","authors":"Miaosi Li, Nan Nan, Ebrahim Sharaf Aldeen, Yang Fu, Lei Bao","doi":"10.1021/acs.iecr.5c03843","DOIUrl":"https://doi.org/10.1021/acs.iecr.5c03843","url":null,"abstract":"Heightened concerns over perfluoroalkyl and polyfluoroalkyl substances (PFAS) have intensified the demand for cost-effective, rapid, and sensitive detection technologies. Carbon nanodots (C-dots), as emerging metal-free quantum dots, show strong potential for environmental sensing; however, their integration into solid-state platforms for PFAS detection remains limited. Here, we present a droplet-mode electrochemical impedance spectroscopy (EIS) platform that leverages liquid–liquid phase separation (LLPS) to direct the self-assembly of C-dots into mesoporous architectures on flexible indium tin oxide electrodes. By formulating ternary microdroplets and tracking their evaporation in situ, we capture intermediate LLPS states that control the pore morphology, with porosity aligning closely with theoretical predictions from ternary phase diagrams. These mesoporous electrodes exhibit enhanced PFAS adsorption and charge-transfer modulation, enabling a strong impedance response. The sensor achieves a detection limit of 2 ppb for perfluorooctanoic acid (PFOA) in spiked tap water and operates within a linear range of 10–200 ppb, all without sample pretreatment. Furthermore, as confirmed by theoretical and experimental analysis, the platform is adaptable to longer-chain PFAS, such as perfluorodecanoic acid (PFDA). This simple and tunable LLPS-based strategy offers a new route to engineer nanocarbon architectures for solid-state sensing and facilitates point-of-need monitoring of persistent environmental contaminants.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"9 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146121898","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}
Carbon fiber plates (CFP) are widely used due to their high strength and lightweight properties, but they have poor resistance to water and oil, posing safety risks. This work introduces a method for preparing a superamphiphobic coating on CFP using spraying, which can be dynamically controlled by light and heat, and responds to ultraviolet light. The superamphiphobic carbon fiber plate (SKCFP) achieves a water contact angle of 163° and an oil contact angle of 158°, withstanding 95 h of ultraviolet exposure and 120 wear cycles. It also demonstrates excellent resistance to water impact, acid, and alkali, showing strong potential for use in drones, smart wearables, and more. This study presents a novel method for preparing superamphiphobic coatings, thereby opening up new avenues for the application of CFP in various fields. This sample not only exhibits superamphiphobicity but also cost-effectiveness, outperforming existing studies.
{"title":"Study on the Preparation and Performance of Dynamic Photothermal Control and UV-Indicating Superamphiphobic Coating on Carbon Fiber Plate","authors":"Qian Su, Kangli Yang, Zhiqing Yuan, Xuyu Long, Rui He, Cancheng Li, Shoutong Meng","doi":"10.1021/acs.iecr.5c04186","DOIUrl":"https://doi.org/10.1021/acs.iecr.5c04186","url":null,"abstract":"Carbon fiber plates (CFP) are widely used due to their high strength and lightweight properties, but they have poor resistance to water and oil, posing safety risks. This work introduces a method for preparing a superamphiphobic coating on CFP using spraying, which can be dynamically controlled by light and heat, and responds to ultraviolet light. The superamphiphobic carbon fiber plate (SKCFP) achieves a water contact angle of 163° and an oil contact angle of 158°, withstanding 95 h of ultraviolet exposure and 120 wear cycles. It also demonstrates excellent resistance to water impact, acid, and alkali, showing strong potential for use in drones, smart wearables, and more. This study presents a novel method for preparing superamphiphobic coatings, thereby opening up new avenues for the application of CFP in various fields. This sample not only exhibits superamphiphobicity but also cost-effectiveness, outperforming existing studies.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"31 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146115991","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}
Pub Date : 2026-02-05DOI: 10.1021/acs.iecr.5c03822
Renxing Huang, Jing Wang, Lixia Kang, Yongzhong Liu
To address the intermittency of renewable energy supply in the production of renewable methanol, an optimal design method of hybrid production systems (HPS) for renewable methanol is proposed, which incorporates the economic merit of scaled production systems (SPS) and the operational flexibility of modular production systems (MPS) to alleviate the adverse impacts of fluctuating renewable energy supply. For the optimal design of the HPS, the strategies of frequency-domain decomposition and power allocation are established by using the cutoff amplitude method in spectrum analysis. A mathematical programming model is developed to simultaneously optimize the system design and operational strategy of the HPS for renewable methanol. The case study demonstrates that the HPS achieves a favorable trade-off between operational stability and economic performance by leveraging the complementary strengths of the SPS and MPS. The results show that when the economic performance is prioritized as the objective, SPS is more effective in accommodating renewable energy supply with high power amplitude and low variability, whereas MPS shows superior adaptability under intensive fluctuation of renewable energy supply. Compared to the standalone SPS and MPS, the HPS not only enhances economic performance while maintaining operational robustness but also significantly improves operational stability and equipment utilization efficiency. This work provides a methodology for the optimal design and operation of renewable methanol production systems under complex application scenarios.
{"title":"Design Method of Hybrid Production Systems for Renewable Methanol Using Spectrum Analysis of Renewable Energy Supply","authors":"Renxing Huang, Jing Wang, Lixia Kang, Yongzhong Liu","doi":"10.1021/acs.iecr.5c03822","DOIUrl":"https://doi.org/10.1021/acs.iecr.5c03822","url":null,"abstract":"To address the intermittency of renewable energy supply in the production of renewable methanol, an optimal design method of hybrid production systems (HPS) for renewable methanol is proposed, which incorporates the economic merit of scaled production systems (SPS) and the operational flexibility of modular production systems (MPS) to alleviate the adverse impacts of fluctuating renewable energy supply. For the optimal design of the HPS, the strategies of frequency-domain decomposition and power allocation are established by using the cutoff amplitude method in spectrum analysis. A mathematical programming model is developed to simultaneously optimize the system design and operational strategy of the HPS for renewable methanol. The case study demonstrates that the HPS achieves a favorable trade-off between operational stability and economic performance by leveraging the complementary strengths of the SPS and MPS. The results show that when the economic performance is prioritized as the objective, SPS is more effective in accommodating renewable energy supply with high power amplitude and low variability, whereas MPS shows superior adaptability under intensive fluctuation of renewable energy supply. Compared to the standalone SPS and MPS, the HPS not only enhances economic performance while maintaining operational robustness but also significantly improves operational stability and equipment utilization efficiency. This work provides a methodology for the optimal design and operation of renewable methanol production systems under complex application scenarios.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"88 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146115999","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}
The kinetics of gibbsite dissolution and precipitation in alkaline solutions are important to many industrial processes. The kinetics in pure NaOH solutions has been relatively well-known, especially in the Bayer process to extract aluminum from bauxite ores. However, in tank wastes such as those at Hanford and Savannah River Sites, the kinetics can be greatly complicated by the presence of high concentrations of nitrate and nitrite in addition to NaOH. Understanding the effects of nitrate and nitrite on gibbsite dissolution and precipitation is important for the optimization of a pretreatment process for the tank waste sludges and associated supernatants. In this study, we investigated the dissolution kinetics of gibbsite in concentrated NaOH + NaNO3 and NaOH + NaNO2 solutions. In our experiments, NaOH concentration ranges from 1.0 mol·dm–3 (i.e., mol/L) to 3.0 mol·dm–3, while NaNO3 and NaNO2 concentrations range from 1.0 mol·dm–3 to 5.0 mol·dm–3, covering typical chemical conditions observed in Hanford Tank Waste. A kinetic model was formulated and fitted to the experimental data to extract key thermodynamic and kinetic parameters for gibbsite dissolution. Our experimental results reveal that the dissolution rate constants of gibbsite in nitrite media are about 1 order of magnitude lower than those in corresponding nitrate media, indicating an inhibitory effect of nitrite on mineral dissolution. This inhibitory effect can possibly be attributed to the formation of a passivating layer of > Al-NO2– on the mineral surface (where “>” denotes surface complexes). In solution, nitrite, a Lewis base, forms an aqueous complex of Al(OH)3NO2– and thus increases the apparent solubility of gibbsite, which pushes the dissolution toward a far-from-equilibrium state, leading to etch pit development on the mineral surface. The results presented here have important implications for the pretreatment of tank waste sludge.
{"title":"Kinetics of Gibbsite Dissolution in Concentrated NaOH + NaNO3 and NaOH + NaNO2 Solutions at Elevated Temperatures: A Tale of Two Legends","authors":"Yongliang Xiong, Jessica Kruichak, Yifeng Wang, Amanda Sanchez, Vanessa Mercado, Philipe Weck, Guangping Xu, Scott Wood","doi":"10.1021/acs.iecr.5c04628","DOIUrl":"https://doi.org/10.1021/acs.iecr.5c04628","url":null,"abstract":"The kinetics of gibbsite dissolution and precipitation in alkaline solutions are important to many industrial processes. The kinetics in pure NaOH solutions has been relatively well-known, especially in the Bayer process to extract aluminum from bauxite ores. However, in tank wastes such as those at Hanford and Savannah River Sites, the kinetics can be greatly complicated by the presence of high concentrations of nitrate and nitrite in addition to NaOH. Understanding the effects of nitrate and nitrite on gibbsite dissolution and precipitation is important for the optimization of a pretreatment process for the tank waste sludges and associated supernatants. In this study, we investigated the dissolution kinetics of gibbsite in concentrated NaOH + NaNO<sub>3</sub> and NaOH + NaNO<sub>2</sub> solutions. In our experiments, NaOH concentration ranges from 1.0 mol·dm<sup>–3</sup> (i.e., mol/L) to 3.0 mol·dm<sup>–3</sup>, while NaNO<sub>3</sub> and NaNO<sub>2</sub> concentrations range from 1.0 mol·dm<sup>–3</sup> to 5.0 mol·dm<sup>–3</sup>, covering typical chemical conditions observed in Hanford Tank Waste. A kinetic model was formulated and fitted to the experimental data to extract key thermodynamic and kinetic parameters for gibbsite dissolution. Our experimental results reveal that the dissolution rate constants of gibbsite in nitrite media are about 1 order of magnitude lower than those in corresponding nitrate media, indicating an inhibitory effect of nitrite on mineral dissolution. This inhibitory effect can possibly be attributed to the formation of a passivating layer of > Al-NO<sub>2</sub><sup>–</sup> on the mineral surface (where “>” denotes surface complexes). In solution, nitrite, a Lewis base, forms an aqueous complex of Al(OH)<sub>3</sub>NO<sub>2</sub><sup>–</sup> and thus increases the apparent solubility of gibbsite, which pushes the dissolution toward a far-from-equilibrium state, leading to etch pit development on the mineral surface. The results presented here have important implications for the pretreatment of tank waste sludge.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"223 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146121902","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}
Pub Date : 2026-02-05DOI: 10.1021/acs.iecr.5c03623
Minzhuo Huang, Ricardo M. Lima, Omar M. Knio
This study presents a scheduling and dispatch multiperiod mixed-integer linear program (MILP) for a system to produce hydrogen. The system includes a wind plant, a photovoltaic plant, and a Concentrated Solar Power (CSP) plant with Thermal Energy Storage (TES) to supply renewable electricity to a water desalination plant, storage tanks, and an electrolyzer system. The model features a detailed scheduling for the operations of the receiver and power block of the CSP plant over 8 days, utilizing two different time resolutions. The aim is to determine the optimal scheduling and dispatch that maximize operational profit. Two case studies are analyzed under distinct weather profiles (winter and summer) in Saudi Arabia, alongside a sensitivity analysis on hydrogen demand profiles. The results highlight the critical role of the CSP plant, particularly in scenarios requiring a continuous hydrogen supply and when renewable resources are insufficient. Additionally, the sensitivity analysis reveals that a mixed hydrogen demand profile, incorporating both a continuous demand and a weekly demand, enhances system profitability and component utilization.
{"title":"Scheduling of a Concentrated Solar Power Plant Integrated in a Renewable System for Hydrogen Production","authors":"Minzhuo Huang, Ricardo M. Lima, Omar M. Knio","doi":"10.1021/acs.iecr.5c03623","DOIUrl":"https://doi.org/10.1021/acs.iecr.5c03623","url":null,"abstract":"This study presents a scheduling and dispatch multiperiod mixed-integer linear program (MILP) for a system to produce hydrogen. The system includes a wind plant, a photovoltaic plant, and a Concentrated Solar Power (CSP) plant with Thermal Energy Storage (TES) to supply renewable electricity to a water desalination plant, storage tanks, and an electrolyzer system. The model features a detailed scheduling for the operations of the receiver and power block of the CSP plant over 8 days, utilizing two different time resolutions. The aim is to determine the optimal scheduling and dispatch that maximize operational profit. Two case studies are analyzed under distinct weather profiles (winter and summer) in Saudi Arabia, alongside a sensitivity analysis on hydrogen demand profiles. The results highlight the critical role of the CSP plant, particularly in scenarios requiring a continuous hydrogen supply and when renewable resources are insufficient. Additionally, the sensitivity analysis reveals that a mixed hydrogen demand profile, incorporating both a continuous demand and a weekly demand, enhances system profitability and component utilization.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"2 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146115998","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}
Pub Date : 2026-02-05DOI: 10.1021/acs.iecr.6c00423
Xuan Fei, Yingjie Wang, Penglei Guo, Jinggang Wang, Guyue Wang, Guangming Lu, Weiwei Zhao, Xiaoqing Liu
This correction amends an error in the “Acknowledgments” section. The funding statement for the National Key R&D Program of China included an incorrect grant number. The correct and only grant number for this program should be 2022YFC2104500. No other part of the Acknowledgments or any scientific content, data, or conclusions of the article are affected. This article has not yet been cited by other publications.
{"title":"Correction to “Efficient Catalytic Activity of Ti3C2Tx MXene for Polyester Synthesis”","authors":"Xuan Fei, Yingjie Wang, Penglei Guo, Jinggang Wang, Guyue Wang, Guangming Lu, Weiwei Zhao, Xiaoqing Liu","doi":"10.1021/acs.iecr.6c00423","DOIUrl":"https://doi.org/10.1021/acs.iecr.6c00423","url":null,"abstract":"This correction amends an error in the “Acknowledgments” section. The funding statement for the National Key R&D Program of China included an incorrect grant number. The correct and only grant number for this program should be 2022YFC2104500. No other part of the Acknowledgments or any scientific content, data, or conclusions of the article are affected. This article has not yet been cited by other publications.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"6 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146116001","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}
Pub Date : 2026-02-05DOI: 10.1021/acs.iecr.5c04675
Yubo Li, Ruiting Wang, Jun Wang, Jinhao Liu, Ying Tian, Junbin Li, Lili Feng, Jingwen Ma
Electrocatalytic nitrate reduction reaction (NO3RR) offers a bright pathway for ammonia (NH3) production and protection of the environment. Most NO3RR catalysts still suffer from insufficient surface active hydrogen (Hads). In the research, a Cu/Co4N heterostructure is constructed in which the Cu acts as the adsorption for NO3– while the Co4N enhances the water dissociation to supply Hads for the consecutive NO2–-to-NH3 pathway. Due to the synergistic effect, the Cu/Co4N heterostructure exhibits excellent performance for NO3RR in neutral electrolyte. At a potential of −0.6 V vs RHE (reversible hydrogen electrode), the Cu/Co4N heterostructure attained a Faradaic efficiency (FE) of 93% with an NH3 production of 27.64 mg h–1 cm–2. Benefiting from its outstanding NO3RR activity, a Zn-NO3– battery employing the Cu/Co4N heterostructure as the cathode achieved a maximum power density of 10.1 mW cm–2. The study supplies valuable opinions in the tandem catalysis of heterostructure catalysts and offers an aspect for devising high-performance NO3RR catalysts, aiming to achieve effectual selectivity, sustainable NH3 yield, and environmental contamination control.
电催化硝酸还原反应（NO3RR）为氨（NH3）的生产和环境保护提供了一条光明的途径。大多数NO3RR催化剂仍然存在表面活性氢（Hads）不足的问题。在研究中，构建了Cu/Co4N异质结构，其中Cu作为NO3 -的吸附，而Co4N促进水的解离，为NO2——连续转化为nh3的途径提供Hads。由于协同效应，Cu/Co4N异质结构在中性电解质中表现出优异的NO3RR性能。在−0.6 V vs RHE（可逆氢电极）电位下，Cu/Co4N异质结构的法拉第效率（FE）为93%，NH3产量为27.64 mg h-1 cm-2。利用Cu/Co4N异质结构作为阴极的Zn-NO3 -电池具有优异的NO3RR活性，最大功率密度为10.1 mW cm-2。该研究为异质结构催化剂的串联催化提供了有价值的见解，为设计高性能NO3RR催化剂提供了一个方面，以实现有效的选择性、可持续的NH3产率和环境污染控制。
{"title":"Interfacial Engineering in Cu/Co4N Heterostructure toward Ammonia Production from Nitrate Reduction","authors":"Yubo Li, Ruiting Wang, Jun Wang, Jinhao Liu, Ying Tian, Junbin Li, Lili Feng, Jingwen Ma","doi":"10.1021/acs.iecr.5c04675","DOIUrl":"https://doi.org/10.1021/acs.iecr.5c04675","url":null,"abstract":"Electrocatalytic nitrate reduction reaction (NO<sub>3</sub>RR) offers a bright pathway for ammonia (NH<sub>3</sub>) production and protection of the environment. Most NO<sub>3</sub>RR catalysts still suffer from insufficient surface active hydrogen (H<sub>ads</sub>). In the research, a Cu/Co<sub>4</sub>N heterostructure is constructed in which the Cu acts as the adsorption for NO<sub>3</sub><sup>–</sup> while the Co<sub>4</sub>N enhances the water dissociation to supply H<sub>ads</sub> for the consecutive NO<sub>2</sub><sup>–</sup>-to-NH<sub>3</sub> pathway. Due to the synergistic effect, the Cu/Co<sub>4</sub>N heterostructure exhibits excellent performance for NO<sub>3</sub>RR in neutral electrolyte. At a potential of −0.6 V vs RHE (reversible hydrogen electrode), the Cu/Co<sub>4</sub>N heterostructure attained a Faradaic efficiency (FE) of 93% with an NH<sub>3</sub> production of 27.64 mg h<sup>–1</sup> cm<sup>–2</sup>. Benefiting from its outstanding NO<sub>3</sub>RR activity, a Zn-NO<sub>3</sub><sup>–</sup> battery employing the Cu/Co<sub>4</sub>N heterostructure as the cathode achieved a maximum power density of 10.1 mW cm<sup>–2</sup>. The study supplies valuable opinions in the tandem catalysis of heterostructure catalysts and offers an aspect for devising high-performance NO<sub>3</sub>RR catalysts, aiming to achieve effectual selectivity, sustainable NH<sub>3</sub> yield, and environmental contamination control.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"20 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146116000","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}
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