Chemical Engineering Science最新文献_第2页

An innovative dual-phase platform for biohydrogen production: Chlorella-based nutrient removal and E. aerogenes fermentation with PEMFC power generation evaluation 一种创新的双相生物制氢平台：基于小球藻的营养物去除和产气大肠杆菌发酵与PEMFC发电的评估

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-03 DOI: 10.1016/j.ces.2026.123491

Ashwin Jacob , Abed Alaswad , B. Ashok , V. Praveen , L. Jino

{"title":"An innovative dual-phase platform for biohydrogen production: Chlorella-based nutrient removal and E. aerogenes fermentation with PEMFC power generation evaluation","authors":"Ashwin Jacob , Abed Alaswad , B. Ashok , V. Praveen , L. Jino","doi":"10.1016/j.ces.2026.123491","DOIUrl":"10.1016/j.ces.2026.123491","url":null,"abstract":"<div><div>This study pioneers the utilization of bakery wastewater (BW) as a cost-effective and sustainable growth medium for Chlorella pyrenoidosa, integrating bioremediation and renewable energy generation through biohydrogen production. Furthermore, the quality of the produced hydrogen is analysed in a proton exchange membrane fuel cell (PEMFC) stack in its raw and purified form. By adopting a dual-phase cultivation approach with native bacteria and C. pyrenoidosa, the process achieved complete BW treatment without dilution or sterilization, delivering nutrient removal efficiencies of 79% for chemical oxygen demand (COD), 94% for nitrogen (TNi), and 80.4% for phosphorus (TPo). Remarkably, the biomass demonstrated a high carbohydrate content (49%) with a productivity rate of 305.8 mg/L/d, underscoring its potential for biohydrogen generation. Subsequent dark fermentation using E. aerogenes and a probe-based pH stabilization protocol at a vol. of 363 mL of hydrogen, achieving a production rate of 59.72 mL/L/h and a yield of 1.5 mol/mol reducing sugars, outperforming established benchmarks. The hydrogen generated was utilized in a PEMFC to assess performance and durability using raw BW-derived hydrogen (BW H<sub>2</sub>) and purified BW-derived hydrogen (PBW H<sub>2</sub>). After 200 cycles, the PEMFC exhibited a performance reduction of 1.3 A/cm<sup>2</sup> with PBW H<sub>2</sub>, while significant degradation was observed with BW H<sub>2</sub> (1.15 A/cm<sup>2</sup> to 0.3 A/cm<sup>2</sup>), primarily due to impurities impacting the membrane and electrode’s active area. This study’s novelty lies in developing an innovative dual-phase cultivation strategy, integrating indigenous wastewater bacteria to enhance nutrient removal and biomass production, offering a novel approach for treating bakery wastewater.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123491"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146116070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

On the H-atom abstractions from small fatty acid methyl esters by nitric oxide: An ab initio theoretical kinetic study 一氧化氮对小脂肪酸甲酯中h原子的萃取：从头算理论动力学研究

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-04 DOI: 10.1016/j.ces.2026.123528

Ruirui Kong , Zhiheng Zhu , Ning La , Fashe Li , Hua Wang , Yaozong Duan

{"title":"On the H-atom abstractions from small fatty acid methyl esters by nitric oxide: An ab initio theoretical kinetic study","authors":"Ruirui Kong , Zhiheng Zhu , Ning La , Fashe Li , Hua Wang , Yaozong Duan","doi":"10.1016/j.ces.2026.123528","DOIUrl":"10.1016/j.ces.2026.123528","url":null,"abstract":"<div><div>Small fatty acid methyl esters were selected as simplified surrogate fuels for biodiesel, and high-level quantum chemical calculations were conducted to study the H-abstraction reactions with nitric oxide (NO). The effects of carbon chain length and C=C bond were systematically investigated. The geometry optimization, frequency analysis and 1-dimensional hindered scan of stationary points were performed at the M06-2X/6–311++G(d,p) level of theory, and the single point energies were calculated using CCSD(T)/cc-pVXZ (X = D, T) and MP2/cc-pVYZ (Y = D, T and Q), which were extrapolated to the complete basis set. Rate coefficients were computed in the temperature range of 298 ∼ 2000 K using conventional transition state theory (TST). For the saturated fatty acid methyl esters, the barrier heights follow the order of primary carbon > secondary carbon > tertiary carbon, and the rate coefficients generally increase as the carbon chain length increases. For the unsaturated fatty acid methyl esters, H-abstraction reaction from the allylic carbon site shows the lowest barrier heights. Compared to the saturated counterparts, the barrier heights for abstracting from α<em><sub>p</sub></em> carbon sites are almost comparable (MPa) or much smaller (<em>n</em>-MB), and the rate coefficients from α<em><sub>p</sub></em> carbon site of M2B are consistently higher than those of <em>n</em>-MB. This is deduced the presence of the C=C bond significantly affects the barrier height of the H-abstraction reactions, and thereby influences the relative reactivity of carbon sites. This study helps to gain a deeper understanding of the interaction mechanism between fatty acid methyl esters and NO, and provides theoretical guidance for combustion kinetics models related to fatty acid methyl esters.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123528"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146116037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Role of non-newtonian rheology on gas-liquid mass transfer and bubble dynamics in T-junction microchannels 非牛顿流变性对t结微通道气液传质和气泡动力学的影响

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-06 DOI: 10.1016/j.ces.2026.123525

Xingrui Zhou, Lian Duan, Jingru Sun, Dongjie Liu, Wenjun Yuan, Fei Chen

{"title":"Role of non-newtonian rheology on gas-liquid mass transfer and bubble dynamics in T-junction microchannels","authors":"Xingrui Zhou, Lian Duan, Jingru Sun, Dongjie Liu, Wenjun Yuan, Fei Chen","doi":"10.1016/j.ces.2026.123525","DOIUrl":"10.1016/j.ces.2026.123525","url":null,"abstract":"<div><div>Although gas–liquid mass transfer in microchannels has attracted increasing research interest, a comprehensive understanding of how rheological properties influence mass transfer is still lacking. In this study, three-dimensional numerical simulations are performed to investigate oxygen absorption into shear-thinning fluids within a T-junction microchannel. The multiphase mass transfer model employs the Volume-of-Fluid method coupled with a Compressive Continuous Species Transfer formulation, and the rheology behavior is described by the Cross model. The results show that rheological parameters significantly govern various bubble morphologies and hydrodynamics. Specifically, increasing the zero-shear viscosity promotes earlier breakup, whereas increasing the time constant delays breakup. The volumetric mass transfer coefficient <em>k<sub>L</sub>a</em> is modulated by a factor of 3 across the investigated range of rheological parameters. An enhancement of mass transfer is revealed under higher time constant. This is attributed to the intensified interfacial renewal during the bubble formation stage, which compensates for the reduced transport efficiency in the downstream region caused by longer liquid segments and lower bubble velocities. Furthermore, the contribution of mass transfer flux from the bubble formation region decreases with increasing <em>η</em><sub>0</sub> and increases with increasing <em>λ</em>, thereby leading to the dominance of mass transfer in the formation region over a relatively short channel length. Finally, a dimensionless predictive model for <em>k<sub>L</sub>a</em> with a deviation within 20% is established, which captures the effects of flow inertia and rheological properties. These findings provide theoretical guidance for the design and optimization of non-Newtonian microfluidic systems.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123525"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146121903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Orthogonal curvilinear coordinates-based high gravity flow-enhanced mass transfer 基于正交曲线坐标的高重力流强化传质

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-04 DOI: 10.1016/j.ces.2026.123517

Yuedi Guo , Menghan Wang , Zhi Qian

{"title":"Orthogonal curvilinear coordinates-based high gravity flow-enhanced mass transfer","authors":"Yuedi Guo , Menghan Wang , Zhi Qian","doi":"10.1016/j.ces.2026.123517","DOIUrl":"10.1016/j.ces.2026.123517","url":null,"abstract":"<div><div>High Gravity (HiGee) technology achieves significant improvement in gas–liquid mass transfer efficiency. Conventionally, HiGee’s high mass transfer efficiency is often attributed to increased interfacial area, without considering the critical role of droplet internal flow, resulting in insufficient exploration of the mass transfer mechanisms in distinct zones. Here, we developed a circulation-oscillation coupled flow field model within droplets to address this gap. By introducing an orthogonal curvilinear coordinate system adapted to the flow field structure, we computed the eddy diffusivity at the boundary (<span><math><mrow><msub><mi>D</mi><mtext>eff</mtext></msub><mo>≈</mo><mn>3.9</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>-</mo><mn>4</mn></mrow></msup><mi>R</mi><msub><mi>U</mi><mi>∞</mi></msub></mrow></math></span>), which reaches up to an order of magnitude of 10<sup>2</sup> relative to the molecular diffusivity. The average mass transfer coefficient (<span><math><mrow><mover><mrow><mi>k</mi></mrow><mrow><mo>¯</mo></mrow></mover><mo>=</mo><msqrt><mrow><msub><mover><mrow><mi>D</mi></mrow><mrow><mo>¯</mo></mrow></mover><mtext>eff</mtext></msub><mi>S</mi></mrow></msqrt></mrow></math></span>) in the end-effect zone is approximately three times higher than that in the bulk packing zone, demonstrating the intrinsic differences in mass transfer dynamics between the two zones. Experimental results show that the end-effect zone contributes approximately 50% to the total mass transfer, with model accuracy for the volumetric mass transfer coefficient exceeding 85% in this zone.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123517"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146121944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Simulation and experimental study on the flow field, temperature distribution, and dynamic accumulation behavior of bottom dross in a hot-dip galvanizing bath 热镀锌槽底渣流场、温度分布及动态积累行为的模拟与实验研究

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-03 DOI: 10.1016/j.ces.2026.123514

Hongzhu Fei , Nannan Zhao

{"title":"Simulation and experimental study on the flow field, temperature distribution, and dynamic accumulation behavior of bottom dross in a hot-dip galvanizing bath","authors":"Hongzhu Fei , Nannan Zhao","doi":"10.1016/j.ces.2026.123514","DOIUrl":"10.1016/j.ces.2026.123514","url":null,"abstract":"<div><div>In the continuous hot-dip galvanization process, zinc dross defects are a key factor affecting the surface quality of galvanized steel sheets, and their formation is related to the operating parameters of the galvanizing bath. In this study, industrial-scale CFD single-phase flow numerical simulations and physical simulation experiments are employed to investigate the effects of steel strip width and speed on the flow field characteristics, temperature distribution of molten zinc, and dynamic accumulation behavior of bottom dross. The results show that the first impact flow drivers the high-temperature molten zinc ejected from the front inductor downward toward the bottom of the galvanizing pot, while the second impact flow transports the low-temperature molten zinc, generated during ingot melting along the pot bottom toward the front wall. As the width of the steel strip decreases, the intensity of the first impact flow weakens, while that of the second impact flow strengthens. Consequently, the low-temperature zones in the molten zinc expand, potentially promoting increased dross formation. Although the steel strip speed does not significantly alter the overall flow field characteristics of the molten zinc, it substantially reduces the amount of suspended dross. Furthermore, the associated reduction in the heat exchange rate lowers the temperature of the molten zinc near the bottom of the zinc pot.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123514"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental investigation on CO2 hydrate formation and growth in a liquid CO2 droplet system for hydrate-based CO2 sequestration 液滴固碳系统中CO2水合物形成与生长的实验研究

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-06 DOI: 10.1016/j.ces.2026.123550

Xingxun Li , Longyan Gao , Shuang Liang , Xuesong Li , Guangjin Chen , Changyu Sun

{"title":"Experimental investigation on CO2 hydrate formation and growth in a liquid CO2 droplet system for hydrate-based CO2 sequestration","authors":"Xingxun Li , Longyan Gao , Shuang Liang , Xuesong Li , Guangjin Chen , Changyu Sun","doi":"10.1016/j.ces.2026.123550","DOIUrl":"10.1016/j.ces.2026.123550","url":null,"abstract":"<div><div>The hydrate-based CO<sub>2</sub> sequestration has been considered as an effective approach for the long-term carbon storage. When liquid CO<sub>2</sub> is injected into the seabed, it could be sheared into CO<sub>2</sub> droplets. However, existed studies on the CO<sub>2</sub> hydrate formation and growth in the liquid CO<sub>2</sub> droplet system have been lacking. This study focuses on the investigations of morphological evolution processes of the CO<sub>2</sub> hydrate formation and growth kinetics in the liquid CO<sub>2</sub> droplet system. The effects of temperature, pressure, CO<sub>2</sub> saturation and addition of SDS in the surrounding water phase on the evolution of liquid CO<sub>2</sub> hydrate growth process were investigated. The morphological results indicate three liquid CO<sub>2</sub> hydrate growth stages for a single liquid CO<sub>2</sub> droplet located on a platform, namely, the lateral growth of hydrate film on the surface of liquid CO<sub>2</sub> droplet, the growth of hydrate film at the contact edge between the CO<sub>2</sub> droplet and platform and the vertical fibrous hydrate growth in the form of columnar pattern. The higher CO<sub>2</sub> saturation in the surrounding water, higher pressure and lower temperature can contribute to the faster lateral growth kinetics and smoother hydrate film surface. It was confirmed that the formed hydrates cannot exist stably, gradually dissolving into the surrounding water when the driving force for hydrate formation was low. The addition of SDS in the surrounding water could alter the shape of hydrate-coated CO<sub>2</sub> droplet and remarkably promoted the formation of CO<sub>2</sub> hydrates, resulting in the significant vertical fiber-like hydrate growth phenomena.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123550"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Ammonium salt-mediated antisolvent separation of valuable benzene pentacarboxylic and hexacarboxylic acids from the oxidative depolymerization product mixture of lignite 铵盐介导反溶剂分离褐煤氧化解聚产物混合物中有价苯五羧酸和六羧酸

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-07 DOI: 10.1016/j.ces.2026.123556

Minjie Zhang , Qiufeng Wang , Jianxiu Hao , Na Li , Yanpeng Ban , Keduan Zhi , Huacong Zhou , Quansheng Liu

{"title":"Ammonium salt-mediated antisolvent separation of valuable benzene pentacarboxylic and hexacarboxylic acids from the oxidative depolymerization product mixture of lignite","authors":"Minjie Zhang , Qiufeng Wang , Jianxiu Hao , Na Li , Yanpeng Ban , Keduan Zhi , Huacong Zhou , Quansheng Liu","doi":"10.1016/j.ces.2026.123556","DOIUrl":"10.1016/j.ces.2026.123556","url":null,"abstract":"<div><div>Oxidative depolymerization of lignite into valuable chemicals such as benzene polycarboxylic acids (BPCAs) is a potential pathway for the high-value and non-energy utilization of lignite. Up to now, the selective separation of BPCAs from the complex depolymerization product mixtures remains a huge challenge and impedes the development of this route. BPA and BHA are key platform molecules for constructing high performance and functional materials. In this work, based on the differences in physical and chemical properties of BPCAs, ammonium salt-mediated antisolvent separation of BPCAs from the depolymerization products mixture of lignite was developed. The effects of different separation parameters on the separation efficiency were systematically studied. The results showed that the route could selectively separate benzene hexacarboxylic acid (BHA) and benzene pentacarboxylic acid (BPA) from both the simulated solution and the real lignite depolymerization products. For the real system, the separation yields of BHA and BPA were 76.0 % and 90.0 %, respectively. BHA and BPA accounted for 93.0 % among all BPCAs in the separated solution, indicating an enhanced purity compared to the initial depolymerized product mixture. The antisolvent methanol had high selectivity for BHA and BPA, and the separation selectivity could be tuned by optimizing the ammonia dosage, antisolvent methanol dosage, and the pH of the mother solution. As far as we know, this is the first report fulfilling the selective separation of the valuable BHA and BPA from the real complex depolymerized product mixture of lignite. This work contributes new separation route to promote the depolymerization utilization of lignite.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123556"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Dual-network microgels system with thermal crosslinking behavior for high-temperature steam channeling control in heavy oil reservoirs 具有热交联特性的双网络微凝胶体系用于稠油油藏高温蒸汽窜流控制

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-11 DOI: 10.1016/j.ces.2026.123570

Jianing Yu , Xu Li , Haifeng He , Zhimin Peng , Ansheng Chen , Jinglun Qian , Liming Zheng , Jingyang Pu

{"title":"Dual-network microgels system with thermal crosslinking behavior for high-temperature steam channeling control in heavy oil reservoirs","authors":"Jianing Yu , Xu Li , Haifeng He , Zhimin Peng , Ansheng Chen , Jinglun Qian , Liming Zheng , Jingyang Pu","doi":"10.1016/j.ces.2026.123570","DOIUrl":"10.1016/j.ces.2026.123570","url":null,"abstract":"<div><div>Heavy oil development faces challenges due to high viscosity and steam channeling during thermal recovery. Conventional plugging agents like foams and gels often suffer from thermal instability and low injectivity. This study developed a thermally crosslinkable dual-network microgel system (3AC-PL) for steam channeling control. The system consists of polymer microgels-synthesized from acrylamide (AM), 2-acrylamido-2-methylpropanesulfonic acid (AMPS), α-olefin sulfonate (AOS), and carboxymethyl cellulose (CMC)-and crosslinkers including polyethyleneimine (PEI) and L-lysine hydrochloride (Lys-HCl). Characterized by FTIR, SEM, TG-DSC, and rheology, 3AC-PL demonstrated controlled swelling, excellent thermal/salt resistance, and strong viscoelasticity between 130–160°C. Microfluidic experiments confirmed that the microgel effectively blocked high-permeability channels, diverted steam into low-permeability zones, and increased oil recovery from 63.53 % to 95.20 %. Molecular dynamics simulations further revealed sequential crosslinking mechanisms and the role of hydrogen bonding in network stability. This work presents a promising dual-network microgel system that integrates molecular-level understanding with practical performance, offering an effective solution for managing steam channeling in high-temperature heavy oil reservoirs.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123570"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146160772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Tracing Structural Evolution of Maillard-Derived Carbon Skeletons for Advanced Zinc-Ion Hybrid Supercapacitors 先进锌离子混合超级电容器maillard衍生碳骨架的结构演化

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-11 DOI: 10.1016/j.ces.2026.123588

Qian Shen, Gong Chen, Qihui Zhao, Junyuan Yang, Xinru Men, Li Guo, Yunhe Zhao

{"title":"Tracing Structural Evolution of Maillard-Derived Carbon Skeletons for Advanced Zinc-Ion Hybrid Supercapacitors","authors":"Qian Shen, Gong Chen, Qihui Zhao, Junyuan Yang, Xinru Men, Li Guo, Yunhe Zhao","doi":"10.1016/j.ces.2026.123588","DOIUrl":"10.1016/j.ces.2026.123588","url":null,"abstract":"<div><div>Biomass-derived carbon materials are promising for energy storage due to their sustainability and low cost, but often suffer from limited surface area, poor porosity, and insufficient active sites. To address these issues, nitrogen-doped carbon (BC-GA) with a groove-nested porous structure was synthesized <em>via</em> Maillard reaction between glucose and glycine at 550 °C, followed by KOH etching and calcination. This process enabled uniform nitrogen doping and surface modification, while creating a hierarchical pore structure tailored to match the size of solvated Zn<sup>2+</sup> ions (0.86 nm). When applied in symmetric supercapacitors (BC-GA//BC-GA), the material exhibited a synergistic dual–mechanism storage behavior, delivering a specific capacitance of 103.1F g<sup>−1</sup> at 2 A g<sup>−1</sup> and retaining 65% at 16 A g<sup>−1</sup>. In zinc-ion hybrid supercapacitors (BC-GA//ZnSO<sub>4</sub>(aq)//Zn), it achieved a high energy density of 165 Wh kg<sup>−1</sup> and a power density of 400 W kg<sup>−1</sup>, simultaneously demonstrating practical ability to power an electronic watch. This work offers a new strategy for enhancing biomass carbon through reaction and etching control.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123588"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146160775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Theoretical modelling and kinetic analysis on microwave accelerated crystallization of ZSM-5 ZSM-5微波加速结晶理论建模及动力学分析

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-01 DOI: 10.1016/j.ces.2026.123484

Yan Zhang , Zhenyu Zhao , Yushan Guo , Jing Shi , Kaixu Shen , Hong Li , Jiawei Teng , Xin Gao

{"title":"Theoretical modelling and kinetic analysis on microwave accelerated crystallization of ZSM-5","authors":"Yan Zhang , Zhenyu Zhao , Yushan Guo , Jing Shi , Kaixu Shen , Hong Li , Jiawei Teng , Xin Gao","doi":"10.1016/j.ces.2026.123484","DOIUrl":"10.1016/j.ces.2026.123484","url":null,"abstract":"<div><div>Microwave technology can accelerate zeolite crystallization, thereby reducing synthesis time and energy consumption. However, there is little quantitative information on the underlying micro-mechanisms of the acceleration effect, thus hindering the rational design of microwave-assisted ZSM-5 synthesis processes. Therefore, this study elucidated the mechanism of microwave-accelerated ZSM-5 crystallization by developing a real-time Raman-based monitoring method for temperature-dependent kinetic analysis. ZSM-5 samples prepared via conventional hydrothermal method and microwave heating were compared, with the crystallization process divided into nucleation and crystal-growth stages for kinetic analysis. Combined with dielectric spectroscopy characterization, the regulation of microwave-induced acceleration was revealed, followed by the establishment and isothermal experimental validation of a theoretical model to describe microwave-selective heating effects. The results show that to achieve the target crystallinity of 95%, the conventional heating method requires 110 min, while microwave heating shortens this time to 40 min. Microwave acceleration primarily enhances the pre-exponential factor of the crystallization process, which can be attributed to the selective promotion of molecular kinetic energy in ionic precursors, highlighting the effects of ionic concentration and microwave field intensity. A 1.5-fold increase in ionic content enhances ionic migration by 28.6%, shortening nucleation time from 25 min to 14 min. Furthermore, increasing the microwave electric field from 0.34 V/m to 0.60 V/m raises the nucleation rate from 0.033 min<sup>−1</sup> to 0.071 min<sup>−1</sup>. The mechanistic insights into microwave-accelerated ZSM-5 crystallization, along with the developed kinetic monitoring method and quantitative model, provide theoretical support for the development of large-scale microwave-assisted zeolite synthesis processes.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123484"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146098317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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