Journal of the Taiwan Institute of Chemical Engineers最新文献

{"title":"Effect of NiFe2O4 Phase and tribological properties on Vacuum plasma spray Cr3C2+25NiCr coating ER 2205 - 66Co26Cr5WC filler high-strength alloy plate fabricated by wire arc additive manufacturing process","authors":"M. Karthikeyan,&nbsp;R. Selvabharathi","doi":"10.1016/j.jtice.2025.106418","DOIUrl":"10.1016/j.jtice.2025.106418","url":null,"abstract":"<div><h3>Background</h3><div>In the present research effort, single-layer deposition was used to fabricate high-strength alloy plates for wire arc additive manufacturing (WAAM) procedures using 2205 (FeCr-WAAM), 66Co26Cr5WC (CoCr-WAAM), and Fe-interface metallic (Fe-IM). The study aimed to improve the mechanical characteristics and surface morphology of high-strength alloy plate samples by comparing WAAM samples with those coated using plasma spray, focusing on microstructure, hardness, porosity faults, and wear resistance.</div></div><div><h3>Methods</h3><div>Microstructural analyses were carried out using SEM and EBSD techniques. For 2205 filler wire samples, FeCr₂O₄ multiferroic spinel, γ’-austenite crystal (AC), and CrCo biomaterial phases were observed. The 66Co26Cr5WC filler showed Co-rich solid structures (CSS), martensitic ferrite transformation (MFT), and CrO₃ crystal structures under varying heat inputs. EBSD revealed that Fe-IM samples coated with plasma spray exhibited NiFe₂O₄ cubic ferromagnetic oxide, MnCr₂O₄, and MnO₄ lattice structures, while uncoated Fe-IM samples showed NiFe₂O₄, Fe₃O₄, and CoFe₂O₄ phases. Bulk texture analysis indicated that interface metallic coated surfaces (Fe-IMC₁&lt;200&gt;, Fe-IMC₂&lt;022&gt;, Fe-IMC₃&lt;111&gt;, and Fe-IMC₄&lt;311&gt;) contained more nickel and cobalt compared to outer surfaces. Inner surface layers of Fe-IM₁&lt;001&gt;, Fe-IM₂&lt;111&gt;, and Fe-IM₃&lt;110&gt; showed multiferroic CoFe structure and α-austenite crystal structure. Wear resistance and corrosion studies were performed on WAAM, WAAM-IM, and WAAM-C sample surfaces.</div></div><div><h3>Significant findings</h3><div>Compared to the 2205 filler wire samples, the Fe-IM coated samples exhibited a 14 % higher hardness value. The NiFe₂O₄ structure was found to provide protection to both inner and outer surface layers of the samples. These findings suggest that interface metallic coating and plasma spray treatment significantly enhance the mechanical and surface characteristics of WAAM-fabricated high-strength alloy components.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"179 ","pages":"Article 106418"},"PeriodicalIF":6.3,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-purity DEP-based multitarget separation of particles in a converging microchannel","authors":"Reza Derakhshan,&nbsp;Fatemeh Zahra Amirkhanlou,&nbsp;Abas Ramiar","doi":"10.1016/j.jtice.2025.106431","DOIUrl":"10.1016/j.jtice.2025.106431","url":null,"abstract":"<div><h3>Background</h3><div>Dielectrophoresis (DEP) is an efficient, non-invasive method for particle separation. However, most DEP devices focus on binary separation, and achieving high-purity multitarget separation remains challenging. This paper presents the design, fabrication, and characterization of a novel microfluidic device with a converging microchannel for DEP-based multiple-particle separation.</div></div><div><h3>Methods</h3><div>A custom-developed computational fluid dynamics (CFD) solver within the OpenFOAM framework was used to investigate the influence of various geometrical and operational parameters on particle separation. The design derived from numerical analysis was used to fabricate the microdevice. Experimental particle trajectories were tracked under varying conditions and compared with numerical results. The device performance was evaluated by simultaneously separating a mixture containing three different particle groups.</div></div><div><h3>Significant Findings</h3><div>A thorough comparison between experimental and numerical findings validated the high accuracy of the developed simulation model. The microdevice achieved separation purities exceeding 97 % for mixtures of 5–10–15 µm, 5–10–20 µm, and 10–15–20 µm particles at a flow rate of 3 µl/min and specific voltages (18.5 Vpp for the first two mixtures and 16 Vpp for the third). In addition to high purity, recovery rates above 95 % were also achieved for all tested mixtures at the same flow rate, confirming efficient particle collection. Furthermore, the analysis of particle trajectory deviations for sizes 5, 10, 15, and 20 µm indicates that, with further development and increasing the number of outlets to four, high-purity separation of these four particle populations can be achieved.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"179 ","pages":"Article 106431"},"PeriodicalIF":6.3,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MoO3@ZIF-8 core–shell photocatalysts for the degradation of organic dye under visible-light irradiation","authors":"Xin Guo ,&nbsp;Xueqin Wang ,&nbsp;Hejin Liu ,&nbsp;Peng Qiao ,&nbsp;Meiru Zheng ,&nbsp;Yiming Li ,&nbsp;Jiaojing Zhang ,&nbsp;Mei Zhang ,&nbsp;Yanguang Chen ,&nbsp;Hua Song ,&nbsp;Fuping Feng","doi":"10.1016/j.jtice.2025.106433","DOIUrl":"10.1016/j.jtice.2025.106433","url":null,"abstract":"<div><h3>Background</h3><div>Composites of semiconductors and metal–organic frameworks (MOFs) have opened up a promising research direction in the field of photocatalysis, particularly for treating environmental pollution. Despite extensive research on MoO₃ and ZIF-8 in photocatalysis, their organic pollutant degradation efficiency remains constrained under visible light due to rapid charge carrier recombination in monocomponent systems.</div></div><div><h3>Methods</h3><div>In this study, MoO₃@MOF core–shell nanocomposites were synthesized by stirring method using MoO₃ nanorods as the semiconductor and ZIF-8 as the MOF. The physicochemical characterization results confirmed the successful growth of ZIF-8 on the MoO₃ nanorod surfaces.</div></div><div><h3>Significant findings</h3><div>The photocatalytic performance of MoO₃@ZIF-8 was analyzed by evaluating its degradation of Rhodamine B (RhB) solutions under visible light. MoO₃@ZIF-8 showed superior degradation and photocatalytic activity over pure MoO₃ or ZIF-8. The degradation rate of RhB reached 83.6 % after 120 min of visible-light irradiation. MoO₃@0.05ZIF-8 (the mass of each reagent for ZIF-8 synthesis was 0.05 g) exhibited the highest adsorption capacity among the composite materials, reaching 28.9 %. The enhanced performance originates from synergistic MoO₃-ZIF-8 interactions, demonstrating the composite's potential for photocatalytic organic pollutant degradation.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"179 ","pages":"Article 106433"},"PeriodicalIF":6.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metal-free β-ketoenamine-based conjugated microporous polymers: rational design of robust photocatalysts for efficient organic pollutant degradation","authors":"Mohamed Gamal Mohamed ,&nbsp;Yang‐Chin Kao ,&nbsp;Shi-Quan Hong ,&nbsp;Aya Farouk Farghal ,&nbsp;Shiao-Wei Kuo","doi":"10.1016/j.jtice.2025.106434","DOIUrl":"10.1016/j.jtice.2025.106434","url":null,"abstract":"<div><h3>Background</h3><div>The rapid growth of industrialization has led to increased discharge of dye-laden wastewater, posing serious threats to aquatic ecosystems and water sustainability. Synthetic dyes like rhodamine B (RhB) and methylene blue (MB), known for their stable conjugated structures, resist biodegradation and persist in the environment. Their accumulation in water bodies harms aquatic life and can indirectly impact human health.</div></div><div><h3>Methods</h3><div>A series of metal-free β-ketoenamine-based conjugated microporous polymers (CMPs) was synthesized via Schiff-base polycondensation of an amine-terminated azobenzene monomer (AZO-2NH₂), 2,4,6-triformylphloroglucinol (TFP), and a diamino-substituted dibenzothiophene dioxide monomer (DBTD-2NH₂) under solvothermal conditions. By varying the molar feed ratio of AZO-2NH₂:TFP:DBTD-2NH₂ (2:2:1, 1.5:2:1.5, and 1:2:2), three CMP (AZO₂-TFP₂-DBTD₁, AZO_1.5-TFP₂-DBTD_1.5, AZO₁-TFP₂-DBTD₂) with tunable porosity, electronic structure, and morphology were obtained. Comprehensive spectroscopic characterization confirmed the complete formation of β-ketoenamine linkages, the successful incorporation of azo and DBTD motifs, and high chemical purity.</div></div><div><h3>Significant Findings</h3><div>Thermogravimetric analysis of AZO-TFP-DBTD CMPs revealed outstanding thermal stability (<em>T</em>_d10 up to 461 °C, char yield up to 60.8 wt%). Nitrogen sorption studies demonstrated that our AZO-TFP-DBTD CMPs exhibited hierarchical micro- and mesoporosity, with Brunauer–Emmett–Teller (BET) surface areas ranging from 110 to 125 m² g⁻¹ and dominant pore diameters of 1.7-2.0 nm. Ultraviolet photoelectron spectroscopy (UPS) and Tauc plot analyses of AZO-TFP-DBTD CMPs revealed a progressive deepening of the highest occupied molecular orbital (HOMO) level and a narrowing of the optical bandgaps (2.12-2.19 eV) as the DBTD content increased, thereby enhancing visible-light absorption. Photocatalytic evaluation using methylene blue (MB) and rhodamine B (RhB) as model dyes under visible irradiation revealed that AZO₁-TFP₂-DBTD₂ outperformed its counterparts, achieving greater than 98% degradation within 60 min and pseudo-first-order rate constants of up to 0.067 min⁻¹. Mechanistic studies identified singlet oxygen and photo-generated electrons as the primary reactive species. Recyclability tests of AZO₁-TFP₂-DBTD₂ confirmed excellent stability over three cycles with &lt;10% loss in activity. This work highlights the effectiveness of molecular engineering and monomer stoichiometry in optimizing AZO-TFP-DBTD CMP photocatalysts for water remediation.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"179 ","pages":"Article 106434"},"PeriodicalIF":6.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of covalent organic framework integrated hybrid PEI membrane on removal of divalent salts-fulvic acid residues","authors":"S.A. GokulaKrishnan ,&nbsp;S. Srithar ,&nbsp;R. Surya Prakash ,&nbsp;A. Infant Ebinesh ,&nbsp;T. Raguram ,&nbsp;B. Sasikumar ,&nbsp;Muhammed Afnas ,&nbsp;G. Arthanareeswaran ,&nbsp;Mangalaraja Ramalinga Viswanathan","doi":"10.1016/j.jtice.2025.106416","DOIUrl":"10.1016/j.jtice.2025.106416","url":null,"abstract":"<div><h3>Background</h3><div>Natural organic matter (NOMs) can form complexes with divalent salts, increasing their bioaccumulation in aquatic systems and posing health risks to aquatic organisms. This study explores the use of triazine-structured Covalent Organic Frameworks (COFs), specifically NENP-1, incorporated into polyetherimide (PEI) membranes to enhance the removal of fulvic acid (FA) with Mg²⁺ and Ca²⁺ from saline wastewater.</div></div><div><h3>Methods</h3><div>Flat sheet membranes (M2-M5) with varying COF concentrations (0.25 %, 0.5 %, 0.75 %, and 1 %) were fabricated by the phase inversion method. The presence of characteristics peaks at 3486 cm^-1 (secondary amine), 1495 - 1349cm^-1 (triazine structure) functional group in the was confirmed, which confirmed the NENP-1 successful embedding in the matrix of PEI polymer. FESEM analysis revealed that the 0.25 wt.% membrane had uniform nanoparticle dispersion and a thin selective layer, while higher COF content (1 wt.%) caused aggregation and dense layer formation.</div></div><div><h3>Significant Findings</h3><div>Among the membranes (M1-M5), the M2 (0.25 wt.%) COF membrane showed the best performance, achieving solute fluxes of 180 and 190 L·m⁻²·h⁻¹ for FA+MgCl₂ and FA+CaCl₂, with 72 % and 79 % rejection, respectively. Further, the M2 (0.25 wt.%) membrane also demonstrated good antifouling properties, with a flux recovery ratio of 78.5 %. Overall, NENP-1/PEI membranes present a viable solution for removing NOMs and divalent salts from contaminated water sources.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"179 ","pages":"Article 106416"},"PeriodicalIF":6.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Extending reactor lining service life through thiophene treatment of corroded 304 stainless steel","authors":"Rui Huang,&nbsp;Yuhan Sun,&nbsp;Xiaoqing Xu,&nbsp;Renjie Ji,&nbsp;Xiaoyu Yan,&nbsp;Jiale Xu,&nbsp;Chunyi Li","doi":"10.1016/j.jtice.2025.106430","DOIUrl":"10.1016/j.jtice.2025.106430","url":null,"abstract":"<div><h3>Background</h3><div>The lining was a critical component of chemical processing equipment, whose structural stability directly determined production efficiency and product quality. The lining structural damage not only significantly increased the maintenance costs of the equipment but also caused serious influence on the enterprise’s economic benefits. Therefore, research on lining failure mechanisms and protective technology development had the important value of engineering application.</div></div><div><h3>Methods</h3><div>The lining precursor was prepared using a corundum-aluminum dihydrogen phosphate system, with embedded 304 stainless steel that was calcined to obtain the composite lining. The stainless steel which was extracted from the prepared lining evaluated in a C₃H₆/C₃H₈/H₂ mixed atmosphere. After gas-phase thiophene treatment of the prepared lining, the extracted stainless steel sample was tested under identical conditions for comparison. A systematic analysis on corroded zones of the stainless steel surface was conducted using XRD, SEM, XPS, and electrochemical measurements.</div></div><div><h3>Significant Findings</h3><div>The passive film of stainless steel was corroded during lining fabrication, leading to Fe₃O₄ formation on the stainless steel surface, which could catalyze hydrocarbon gases converted to filamentous carbon at high temperatures. The introduction of thiophene could poison Fe₃O₄, reduce its catalytic activity, prevent the formation of filamentous carbon, and thereby extend the service life of the lining.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"179 ","pages":"Article 106430"},"PeriodicalIF":6.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanistic elucidation of novel carbon quantum dots with high selectivity and sensitivity for picric acid detection","authors":"Divya Dagar ,&nbsp;Yu-Fon Chen ,&nbsp;Bhim P. Kafle ,&nbsp;Shanmuganathan Venkatesan ,&nbsp;Yuh-Lang Lee","doi":"10.1016/j.jtice.2025.106432","DOIUrl":"10.1016/j.jtice.2025.106432","url":null,"abstract":"<div><h3>Background</h3><div>Carbon quantum dots (CQDs) have evolved as promising alternatives to traditional semiconductor quantum dots due to their high photoluminescence, stability, tunable emission wavelengths, and diverse applications.</div></div><div><h3>Methods</h3><div>In this study, a novel precursor system composed of terephthalic acid and m-phenylenediamine was developed to synthesize CQDs. The as-prepared CQDs were characterized and applied for picric acid (PA) detection in various environmental samples. Moreover, the underlying sensing mechanism was thoroughly elucidated.</div></div><div><h3>Significant findings</h3><div>The CQDs exhibited excitation-independent green emission at 509 nm with a high quantum yield of 56.3 %. Characterizations confirmed that the green-emissive CQDs (G-CQDs) possessed a graphitic carbon framework and abundant surface functional groups, which contributed to excellent colloidal stability and robust photoluminescence across a wide range of pH values, ionic strengths, storage durations, and under prolonged UV irradiation. For PA sensing, the G-CQDs demonstrated high selectivity and sensitivity, achieving a low detection limit of 17 nM. This sensing capability was not affected by the presence of various cations and anions, and was successfully validated in real samples including sea, river, and tap waters. Mechanistic investigations revealed that the sensing process was primarily governed by the Inner Filter Effect (IFE), rather than by dynamic or static quenching pathways.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"179 ","pages":"Article 106432"},"PeriodicalIF":6.3,"publicationDate":"2025-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Iron and nitrogen co-doped MXene quantum dots: A novel dual-mode electrochemical and fluorescence sensor for dopamine detection","authors":"Rajapriya Govindaraju,&nbsp;Jose Paul,&nbsp;Jihyeon Kim,&nbsp;Jongsung Kim","doi":"10.1016/j.jtice.2025.106421","DOIUrl":"10.1016/j.jtice.2025.106421","url":null,"abstract":"<div><h3>Background</h3><div>MXene quantum dots (MQDs) possess excellent conductivity, abundant active sites, and unique optical properties, yet their metal/heteroatom-modified sensing applications remain underexplored. Here, we report Fe- and N-co-doped MXene quantum dots (FeOMQDs) for the detection of dopamine (DA).</div></div><div><h3>Methods</h3><div>FeOMQDs were synthesized via a one-step hydrothermal process using MXene sheets, FeCl₃, and o-phenylenediamine, and characterized by FTIR, TEM, and XPS. Their fluorescence and electrochemical properties were exploited for DA sensing.</div></div><div><h3>Significant Findings</h3><div>The fluorescence sensing mechanism is governed by DA-induced quenching of FeOMQDs photoluminescence through metal–analyte complexation. The platform exhibited a linear range of 1–10 nM with a detection limit of 0.56 nM. For electrochemical analysis, FeOMQDs were immobilized on glassy carbon electrodes (GCE) and screen-printed electrodes (SPE), followed by evaluation via cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Enhanced electrocatalytic activity toward DA oxidation was observed, attributed to the synergistic interactions between Fe centers and the MXene matrix. The FeOMQDs–GCE demonstrated a linear range of 2–20 nM with detection limits of 1.8 nM (CV) and 1.09 nM (DPV), along with an extended linear range of 40–1000 nM in CV studies. The probes showed excellent reproducibility, stability, and selectivity, with reliable recovery in human serum, confirming their promise for practical bioanalytical applications.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"179 ","pages":"Article 106421"},"PeriodicalIF":6.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of Schiff base derivates from leucine and its inhibition effect on the atmospheric corrosion of mild steel","authors":"Sifei An ,&nbsp;Qiang Wang ,&nbsp;Haini Yang ,&nbsp;Daquan Zhang ,&nbsp;N.N. Andreev","doi":"10.1016/j.jtice.2025.106429","DOIUrl":"10.1016/j.jtice.2025.106429","url":null,"abstract":"<div><h3>Background</h3><div>Schiff bases are attractive as eco-friendly corrosion inhibitors for the protection of metals. In this study, a novel volatile corrosion inhibitor (VCI) based on Schiff base (LEU-T) is synthesized from leucine and salicylaldehyde. This study evaluates the volatile corrosion inhibition performance of LEU-T on mild steel and examines its anti-corrosion effect in a simulated atmospheric corrosion solution.</div></div><div><h3>Methods</h3><div>The corrosion inhibitor is characterized by Fourier transform infrared (FT-IR) absorption spectra. The corrosion behavior, inhibition efficiency, and anti-corrosion mechanism of the inhibitor on mild steel are evaluated using volatile inhibition ability (VIA) tests, electrochemical measurements (including potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS)), and theoretical calculations. Scanning electron microscopy (SEM) and atomic force microscope (AFM) confirm the formation of the inhibitive films on mild steel.</div></div><div><h3>Significant Findings</h3><div>The results demonstrate that LEU-T exhibits outstanding inhibition efficiency of 82.18 % in VIA tests. Electrochemical measurements indicate that the formed inhibitive films on the steel substrate lead to an increase in the charge transfer resistance. The corrosion inhibition efficiencies of leucine and LEU-T, as determined by electrochemical impedance spectroscopy, are 67.84 % and 83.90 %, respectively. SEM and AFM observations indicate that the inhibitor forms a protective VCI coating, effectively retarding the steel corrosion. The LEU-T has larger adsorption energy (-136.13 kJ/mol) compared to leucine (-88.48 kJ/mol) on mild steel.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"179 ","pages":"Article 106429"},"PeriodicalIF":6.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Real-time optimization of continuous catalytic reforming using transfer learning and reinforcement learning for feedstock variability","authors":"Yeshuang Guo,&nbsp;Hai Wang,&nbsp;Long Li,&nbsp;Xinlong Sun,&nbsp;Shaojun Li","doi":"10.1016/j.jtice.2025.106419","DOIUrl":"10.1016/j.jtice.2025.106419","url":null,"abstract":"<div><h3>Background</h3><div>Real-time optimization (RTO) of continuous catalytic reforming (CCR) is hindered by model mismatch caused by feedstock property variations, which degrade the performance of existing optimization strategies.</div></div><div><h3>Methods</h3><div>To address this challenge, this study proposes an RTO method integrating transfer learning (TL) and reinforcement learning (RL). A high-precision surrogate model of the CCR process is constructed as the agent's interactive environment. A TD3 agent is designed based on optimization objectives, incorporating dropout layers during training to enhance robustness. The trained critic network serves as a monitor, detecting feedstock changes via absolute temporal difference error.</div></div><div><h3>Findings</h3><div>TL enables the agent to adapt efficiently to varying feedstock properties. Experimental results demonstrate that the proposed method rapidly identifies optimal operating conditions, with the monitor effectively detecting feedstock changes. Across multiple test cases, the TL strategy reduces average training time to one-tenth of training from scratch, without compromising performance, demonstrating its effectiveness and potential for RTO applications.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"179 ","pages":"Article 106419"},"PeriodicalIF":6.3,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156788","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}