Journal of the Taiwan Institute of Chemical Engineers最新文献

{"title":"Online weighted dynamic time-difference neighborhood preserving embedding for dynamic process monitoring","authors":"Kun Wang,&nbsp;Hongbo Shi,&nbsp;Yang Tao,&nbsp;Bing Song","doi":"10.1016/j.jtice.2025.106035","DOIUrl":"10.1016/j.jtice.2025.106035","url":null,"abstract":"<div><h3>Background:</h3><div>Process monitoring is an important technology for ensuring the safety of the operating process. Recently, many methods based on neighborhood preserving embedding (NPE) are designed for extracting the local structure of data space. However, data collected in actual industrial processes usually exhibit serial correlation. These methods lack attention to time information and ignore the discrepancy in the discriminability of latent variables to faults.</div></div><div><h3>Methods:</h3><div>In order to alleviate the drawbacks for better monitoring performance, a novel online weighted dynamic time-difference neighborhood preserving embedding (OW-DTNPE) algorithm is proposed. Considering the serial correlation, the DTNPE is designed to construct the low-dimensional space based on a new neighborhood selection criterion, which preserves the global–local time information and local space information of process data. In addition, the online weighting strategy is designed based on the deviation degree of each latent variable in real-time. The different weights reflect the correlation between latent variables and faults.</div></div><div><h3>Significant Findings:</h3><div>The effectiveness of the proposed algorithm is demonstrated by a real glycerol distillation process, a numerical case, and Tennessee Eastman (TE) process. The proposed OW-DTNPE outperforms the other comparison methods and shows great potential in real applications.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"172 ","pages":"Article 106035"},"PeriodicalIF":5.5,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705179","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":"Recent progress in ceramic heat exchangers","authors":"Maryam Saberinia ,&nbsp;Farhad Sadegh Moghanlou ,&nbsp;Mohammad Vajdi ,&nbsp;Amir Heydari ,&nbsp;Mehdi Shahedi Asl","doi":"10.1016/j.jtice.2025.106082","DOIUrl":"10.1016/j.jtice.2025.106082","url":null,"abstract":"<div><div>Ceramic heat exchangers have emerged as a promising solution for thermal energy recovery in diverse applications, including chemical processing, power generation, and air conditioning systems. Traditional metallic materials, such as copper, stainless steel, and aluminum, often encounter significant limitations in high-temperature and corrosive environments, resulting in decreased efficiency and shorter operational lifespans. This has led to a growing interest in ceramics, which exhibit superior thermal and mechanical properties, making them particularly suitable for demanding conditions.</div><div>This review offers a comprehensive analysis of ceramic composite heat exchangers, emphasizing the thermal and mechanical characteristics of various ceramic materials that enable them to endure harsh operational environments. It examines recent advancements in ceramic heat exchanger technology, incorporating insights from experimental, theoretical, and numerical studies. The review highlights progress in advanced ceramic materials, particularly novel composites that enhance thermal conductivity and mechanical strength. It also explores the effects of channel geometry and fluid dynamics on heat transfer performance, alongside innovative manufacturing techniques like additive manufacturing and sintering, which can enhance production consistency and reduce costs.</div><div>The findings underscore that ceramics provide significant advantages over metals under extreme conditions, achieving heat transfer efficiencies that markedly exceed those of traditional metal exchangers. Insights from the literature present valuable guidelines for design optimization and efficiency enhancement in ceramic heat exchangers, supporting their wider adoption in industrial applications and contributing to energy savings and improved sustainability in thermal management systems.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"172 ","pages":"Article 106082"},"PeriodicalIF":5.5,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143703888","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":"Photodegradation of tetracycline and coupling photocatalytic H2O2 production driven by concave resins with different concavities under visible light irradiation","authors":"Xinyang He,&nbsp;Ying Tian,&nbsp;Weiwei Lu,&nbsp;Fangfen Jing,&nbsp;Mingzhu Jin,&nbsp;Jiahui Zhu,&nbsp;Qi Fong,&nbsp;Rongtai Yu","doi":"10.1016/j.jtice.2025.106101","DOIUrl":"10.1016/j.jtice.2025.106101","url":null,"abstract":"<div><h3>Background</h3><div>The widespread presence of antibiotics in aquatic environments poses severe ecological risks due to inadequate removal in conventional wastewater treatment. This study investigates morphology-controlled concave polymer nanospheres for simultaneous tetracycline (TC) degradation and photocatalytic H₂O₂ production.</div></div><div><h3>Methods</h3><div>Synthesis of aminophenol-formaldehyde resins (APF) using 3-aminophenol (3-AP), ammonia water, and formaldehyde. Through precise acetone-mediated etching, three concave resin catalysts with distinct concavities (70–78 nm) and wall thicknesses (47–54 nm) were synthesized.</div></div><div><h3>Significant findings</h3><div>Systematic characterization revealed that increased wall thickness enhanced visible-light absorption (up to 700 nm), while higher concavity improved light reflection efficiency. The catalyst synthesized with 38 mL acetone demonstrated optimal H₂O₂ yield (168.5 mg g⁻¹), whereas the maximum TC degradation efficiency (106.57 % at 180 min) was achieved using the 32 mL acetone-etched catalyst with the deepest concavity. Mechanistic studies identified synergistic effects between light scattering geometry and charge carrier dynamics, where concave structures facilitated multi-directional photon utilization while thickened walls suppressed electron-hole recombination. This work provides new insights into morphology engineering for dual-functional photocatalytic systems in environmental remediation.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"172 ","pages":"Article 106101"},"PeriodicalIF":5.5,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685030","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":"COSMO-RS prediction, liquid-liquid equilibrium experiment and quantum chemistry calculation for the separation of methanol and dimethyl carbonate system using dihydrogen phosphate ionic liquids","authors":"Jiaxin Liu,&nbsp;Qinqin Zhang,&nbsp;Chao Wang,&nbsp;Yu Sheng,&nbsp;Jiahui Liu,&nbsp;Yulin Li,&nbsp;Hua Xin,&nbsp;Zhigang Zhang","doi":"10.1016/j.jtice.2025.106102","DOIUrl":"10.1016/j.jtice.2025.106102","url":null,"abstract":"<div><h3>Background</h3><div>Dimethyl carbonate (DMC) is a high value-added chemical, and is also an important chemical raw material and solvent in industry, with a wide range of applications. During the synthesis of dimethyl carbonate, the azeotropic mixtures of DMC and methanol (MeOH), which cannot be separated through conventional distillation, will form inevitably.</div></div><div><h3>Methods</h3><div>In this paper, the feasibility of liquid-liquid extraction separation of DMC and MeOH using ionic liquids (ILs) was explored. 1-ethyl-3-methylimidazolium dihydrogen phosphate ([C₂MIM][H₂PO₄]), 1‑butyl‑3-methylimidazolium dihydrogen phosphate (C₄MIM] [H₂PO₄]), and 1-pentyl-3-methylimidazolium dihydrogen phosphate ( [C₅MIM] [H₂PO₄]) were selected as extractants based on the selectivity calculated by COSMO-RS model as well as the physio-chemical properties of ILs. Liquid-liquid equilibrium (LLE) data for the DMC (1)- MeOH (2)- IL (3) ternary systems were measured at 303.15 K and atmospheric pressure. Selectivity and partition coefficients were calculated based on the experimental LLE results to assess the separation performance of ILs. Othmer-Tobias, Bachman and Hand equations were used to check the quality of the experimental data. NRTL was utilized to correlate the experimental data to obtain the binary interaction parameters. The separation mechanism of the three ILs was explored by interaction energy, IGMH analysis, AIM topological analysis, and FT-IR. Finally, the feasibility of the proposed method in industrial scale was explored using Aspen plus software.</div></div><div><h3>Significant findings</h3><div>The experimental results demonstrated that all the three ILs could be used as potential extractants for liquid-liquid extraction separation of DMC and MeOH. Quantum chemistry calculation and FT-IR results showed it was hydrogen bond that played a key role in the separation of DMC and MeOH mixture using ionic liquids with [H₂PO₄] anions. Liquid-liquid extraction separation of DMC and MeOH in industrial scale is feasible.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"172 ","pages":"Article 106102"},"PeriodicalIF":5.5,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing the analytical modeling of proton-exchange membrane fuel cells for optimal parameter extraction with the Ali Baba and the forty thieves algorithm","authors":"Lazhar Linoubli ,&nbsp;Salah Hajji ,&nbsp;Ramzi Ben Messaoud","doi":"10.1016/j.jtice.2025.106093","DOIUrl":"10.1016/j.jtice.2025.106093","url":null,"abstract":"<div><h3>Background:</h3><div>This research presents an improvement in the analytical modeling of the equivalent electrical circuit of Proton-Exchange Membrane Fuel Cells (PEMFC). This enhancement is based on a more generalized theoretical framework than existing approaches, providing a more accurate representation of the fuel cell’s electrical behavior.</div></div><div><h3>Methods:</h3><div>A new expression for the activation voltage has been developed from an improved solution to the Butler–Volmer equation, providing a more accurate representation of electrochemical kinetics without resorting to the Tafel approximation. Additionally, a generalized formulation of the reversible voltage, accounting for the presence of water vapor, along with adjustments to the concentration voltage, has been integrated to optimize the model’s accuracy. The <em>Ali Baba and The Forty Thieves</em> (AFT) metaheuristic algorithm is employed for parameter extraction, ensuring efficient and robust model optimization.</div></div><div><h3><strong>Significant Results:</strong></h3><div>The proposed model demonstrates significantly higher accuracy, with Total Sum of Squares (SSE) values of <span><math><mrow><mn>3</mn><mo>.</mo><mn>9083</mn><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo><mn>08</mn></mrow></msup><mo>,</mo><mn>5</mn><mo>.</mo><mn>9158</mn><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo><mn>08</mn></mrow></msup></mrow></math></span>, and <span><math><mrow><mn>8</mn><mo>.</mo><mn>0147</mn><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo><mn>10</mn></mrow></msup></mrow></math></span> for the commercial fuel cells NedStack, BCS 500, and Ballard, respectively. These values are considerably lower than the best results reported in the literature (<span><math><mrow><mn>2</mn><mo>.</mo><mn>2881</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>2</mn></mrow></msup><mo>,</mo><mn>1</mn><mo>.</mo><mn>1364</mn><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo><mn>2</mn></mrow></msup><mo>,</mo><mn>0</mn><mo>.</mo><mn>1486</mn></mrow></math></span>), demonstrating the enhanced reliability and precision of the proposed model.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"172 ","pages":"Article 106093"},"PeriodicalIF":5.5,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684968","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":"Promotion effect of element doping on the moisture resistance property of iron-based spinel catalysts for CO-SCR reaction","authors":"Xiaotong Li ,&nbsp;Jie Zhou ,&nbsp;Mingzhe Dong ,&nbsp;Wenpeng Tong ,&nbsp;Lei Zhong ,&nbsp;Songjian Zhao","doi":"10.1016/j.jtice.2025.106097","DOIUrl":"10.1016/j.jtice.2025.106097","url":null,"abstract":"<div><h3>Background</h3><div>Research on the carbon monoxide selective catalytic reduction of nitric oxides (CO-SCR) primarily emphasizes the conversion of NO_x and the resistance to moisture at low temperatures.</div></div><div><h3>Methods</h3><div>A series of MFe₂O₄ catalysts, where M represented Cu, Co, Ni, and Mn, were synthesized through a solvothermal method and subsequently utilized in research focused on CO-SCR.</div></div><div><h3>Significant findings</h3><div>NiFe₂O₄ exhibited excellent NO conversion in the range of 150∼250 °C, reaching 100 % conversion at 225 °C. Also, it possessed well CO conversion rate, water resistance, and stability. It was found that the main active site of CO-SCR over NiFe₂O₄ catalyst was the redox balance of synergistic effect between Ni and Fe, which accelerated electron transfer. The improvement of the denitration performance of the nickel doping could be attributed to more active surface oxygen, more active component ratio (Fe²⁺), and larger specific surface area. This study provided an idea for exploring efficient and stable CO-SCR catalysts.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"172 ","pages":"Article 106097"},"PeriodicalIF":5.5,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684969","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":"Hierarchical synthesis of multi-layer graphene-like and nitrogen-doped graphitized carbon from dead leaf biomass for high-performance energy storage and CO₂ capture","authors":"Raman Arunpandian ,&nbsp;Mohanraj Kumar ,&nbsp;Sahaya Infant Lasalle B ,&nbsp;Paranthaman Vijayakumar ,&nbsp;Jih-Hsing Chang","doi":"10.1016/j.jtice.2025.106100","DOIUrl":"10.1016/j.jtice.2025.106100","url":null,"abstract":"<div><h3>Background</h3><div>This research presents an integrated approach to convert dead leaf biomass into graphene-like materials through a combination of carbonization, activation, graphitization, and graphenization. Unlike conventional techniques that involve separate and a few sequential steps of carbonization, activation, graphitization, and graphenization to treat biomass, we executed the above four processes hierarchically.</div></div><div><h3>Methods</h3><div>DG (multi-layer graphene-like) and NG (nitrogen-doped graphitized carbon) were synthesized via hydrothermal and solvothermal impregnation followed by pyrolysis. Characterization was performed using Raman spectroscopy, BET analysis, XRD, XPS, HR-TEM, and FESEM. CO₂ adsorption was measured using TGA, and Energy storage performance was evaluated through cyclic voltammetry, galvanostatic charge-discharge measurements, electrochemical impedance spectroscopy, and long-term stability tests, all conducted using a three-electrode configuration<strong>.</strong></div></div><div><h3>Significant Findings</h3><div>DG had a surface area of 1400 m²/g, CO₂ adsorption of 50 mg/g, and a specific capacitance of 184 F/g at 1 A/g. NG showed a surface area of 947 m²/g, CO₂ adsorption of 70 mg/g, and a specific capacitance of 206 F/g at 1 A/g. These results highlight the potential of biomass-derived graphene-like materials for sustainable CO₂ capture and energy storage.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"172 ","pages":"Article 106100"},"PeriodicalIF":5.5,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684970","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":"Black-odor water body remediations by ecological floating island coupled with Ecobase and Acinetobacter haemolyticus: Lab and pilot tests","authors":"Xiaoyuan Zhang ,&nbsp;Qing Qin ,&nbsp;Xuetong Zhai ,&nbsp;Hongliang Guo ,&nbsp;Song Han ,&nbsp;Jo-Shu Chang ,&nbsp;Duu-Jong Lee","doi":"10.1016/j.jtice.2025.106081","DOIUrl":"10.1016/j.jtice.2025.106081","url":null,"abstract":"<div><h3>Background</h3><div>Energy-efficient remediation technology for black and odorous water bodies in cold and salty areas is in high demand. This study experimentally investigated the performance of a novel integrated process at lab and pilot scales, in both batch and continuous-flow modes, to treat black and odorous lake water from Daqing City, China.</div></div><div><h3>Methods</h3><div>In 25-liter batch tests, relevant influence conditions were optimized. The 756-liter batch tests confirmed these results. Meanwhile, a continuous flow experiment was added to improve the removal rate of pollutants further.</div></div><div><h3>Significant findings</h3><div>In 25-liter batch tests maximum removal rates for COD, NH₄⁺-N, TP, and TN were 78.6 %, 72.3 %, 79.1 %, and 76.3 %, respectively, using reed plants and carbon fiber grass with L₂ bacteria under optimal conditions (two cfb per floating-island unit, pH 8, DO of 4 mg/L, 25–30 °C, microbial enhancer of 0.75 g/flu). The 756-liter batch tests confirmed these results, achieving improved removal rates of 80.4 %, 75.1 %, 75.5 %, and 78.4 % over 30 days. Continuous-flow tests yielded maximum removal rates of 85.2 %, 89.5 %, 87.4 %, and 90.1 % at an 8-hour HRT, demonstrating superior performance under short retention times. The study revealed interactions with the key biological processes during remediation. The proposed costs for this method indicate high feasibility for field applications.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"172 ","pages":"Article 106081"},"PeriodicalIF":5.5,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654647","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":"Magnetic response of monolayer H-phase VS2 nanosheets at room temperature: Implications for spintronics device","authors":"Amit Kumar Patel,&nbsp;Suyash Rai,&nbsp;Sajal Rai","doi":"10.1016/j.jtice.2025.106073","DOIUrl":"10.1016/j.jtice.2025.106073","url":null,"abstract":"<div><h3>Background</h3><div>Transition metal dichalcogenides (TMDs), explicitly monolayer vanadium disulfide (VS₂) in its H-phase, have gained remarkable attention due to their semiconducting nature, intrinsic magnetic properties at room temperature (RT), and potential use in future spintronic devices.</div></div><div><h3>Method</h3><div>In this study, we report an optimized, simple, and scalable synthesis of monolayer H-phase VS₂ crystal using an atmospheric pressure chemical vapor deposition (APCVD) technique.</div></div><div><h3>Significant findings</h3><div>The Raman spectra and High-resolution transmission electron microscopy (HRTEM) image of the as-synthesized VS₂ crystal reveal that the as-synthesized sample has an H-phase, and atomic force microscopy (AFM) confirms the presence of a monolayer with a step height of ∼ 0.7 nm. Further, the room temperature magnetic force microscopy (MFM) study gives a phase shift of 0.68° to 0.06° for the sample-tip variation from 20 nm to 140 nm in steps of 20 nm, suggesting an intrinsic long-range magnetic ordering in the as-synthesized VS₂ crystal. The decrease in the MFM phase shift exhibits exponential dependence on the sample to AFM tip distance. Finally, our MFM phase shift measurement findings suggest a RT magnetic response in monolayer H-phase VS₂ crystal. These results are much higher than the other previously reported MFM responses of metallic T-phase VS_2, indicating robust experimental evidence for the magnetic behavior of monolayer H-phase VS_2. Our study introduces a pathway to explore the opportunity for highly efficient future spintronic devices using 2D magnetic materials at RT.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"171 ","pages":"Article 106073"},"PeriodicalIF":5.5,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143643802","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":"Ultrahighly permeable carbon molecular sieving membranes enabled by blocking the precursor polyimide molecules with 6FAP moieties","authors":"Ying Zhang ,&nbsp;Bing Zhang ,&nbsp;Yonghong Wu ,&nbsp;Tonghua Wang","doi":"10.1016/j.jtice.2025.106096","DOIUrl":"10.1016/j.jtice.2025.106096","url":null,"abstract":"<div><h3>Background</h3><div>Selecting appropriate polymer precursors is essential for developing high-performance carbon molecular sieve membranes (CMSMs) for gas separation, as precursor structure significantly impacts the resulting membrane's thermal stability, microstructure, and gas transport properties.</div></div><div><h3>Methods</h3><div>This study reports the synthesis of a novel polyimide for CMSMs fabrication, which features a main chain backbone of tetrahydrocyclobuta (1,2-c:3,4-c') difuran-1,3,4,6-tetraone-1,4-bis (4-amino-2-trifluoromethylphenoxy) benzene (CBDA-6FAPB), with 2, 2-bis (3-amino-4-hydroxyphenyl) hexafluoropropane (6FAP) diamine as a block monomer via ternary co-polymerization. The thermal stability, surface functional groups, microstructure and morphology of the membranes were characterized by thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. The effects of varying 6FAP proportions, and the permeation conditions on the thermal stability of polyimide, the microstructure and gas separation performance of CMSMs were systematically investigated.</div></div><div><h3>Significant findings</h3><div>Results show that increasing the proportion of 6FAP enhances the selectivity of CMSMs, with the gas permeability initially rising then decreasing. Exceptionally ultrahigh permeabilities are achieved, corresponding to 7690.0 Barrer (H₂), 2578.6 Barrer (CO₂) and 1466.5 Barrer (O₂), along with the selectivities of 31.0 (H₂/N₂), 10.4 (CO₂/N₂) and 5.9 (O₂/N₂), for CMSMs made by the proportion of 5% of 6FAP segments. In summary, the as-prepared CMSMs are excellent and promising with attractively commercial prospect.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"171 ","pages":"Article 106096"},"PeriodicalIF":5.5,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683256","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}