Journal of the Taiwan Institute of Chemical Engineers最新文献_第7页

Aspen Adsorption simulation breakthrough curve to determine adsorption time in CH4/N2 adsorption separation by activated carbon

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-03-03 DOI: 10.1016/j.jtice.2025.106065

Youhan Chen, Yunfeng Hu

Background

Pressure swing adsorption (PSA) is a crucial technology for CH₄/N₂ gas separation. While Aspen Adsorption numerical simulation offers an efficient approach to studying this process, precise guidelines for parameter setting are lacking. This study aims to address this gap using activated carbon as an adsorbent.

Methods

Aspen Adsorption simulations were used to develop breakthrough curves and virtual tower models for CH₄/N₂ separation. The study analyzed the impact of adsorption time on product purity and recovery. Additionally, concentration curves were examined to determine their influence on adsorption time setting.

Significant Findings

The optimal adsorption time for CH₄/N₂ adsorption on activated carbon was determined to be 850 s, which corresponds to the initial change in slope of the concentration curve. At this point, the system achieves optimal performance, with a CH₄ purity of 82.3 % and a recovery rate of 95.4 %. Furthermore, near the initial slope change (850 s), the concentration curve stabilizes, and the bed utilization rate reaches a higher level. To prevent output gas contamination, the step conversion process should be initiated before the breakthrough point (1450 s). This study provides valuable guidelines for optimizing pressure swing adsorption operations in CH₄/N₂ separation using activated carbon.

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引用次数: 0

Hydrodynamics of gas/shear-thinning fluid flowing in a co-flow microchannel

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-03-03 DOI: 10.1016/j.jtice.2025.106036

Wenyuan Fan , Shuaichao Li , Lixiang Li , Rujie Wang , Shiyang Liu , Taotao Fu

Background

Gas-liquid flow hydrodynamics are one of crucial roles in enhancing the interphase transport and reaction properties in microchannel reactors.

Methods

The hydrodynamics of gas-liquid flow in a co-flow microchannel with shear-thinning fluid were numerically investigated using a coupled level-set and volume-of-fluid method by considering the rheological characteristics of the fluid. The reliability of the numerical approach is validated through comparing the calculated liquid film thickness with film thickness in previous work quantitatively. The influences of liquid phase type, carboxymethylcellulose (CMC) solution and surfactant (SDS) concentrations on flow pattern and film thickness are elucidated respectively.

Significant findings

Five flow patterns, i.e., bubbly flow, Taylor flow, Taylor annular flow, annular flow, and churn flow, were intuitively identified in a broad range of liquid phases including water, CMC solution, and polyacrylamide (PAM) solution, and a fundamental flow pattern map has been constructed using the Weber numbers for two phases. The results indicate that the proportions occupied by bubbly flow and churn flow expand significantly whereas the areas associated with other patterns shrink in both non-Newtonian fluids compared to water. The similar transitions in flow pattern are enhanced overall by increasing CMC and SDS concentrations. The film thickness always increases linearly with capillary number in all fluids. The maximum film thickness exists in the most contaminated CMC solutions by SDS, whereas the minimum one in water. Finally, a novel scaling law of film thickness in a co-flow microchannel with shear-thinning liquids is developed and has satisfactory accuracy by comparing with the literature predictions.

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引用次数: 0

Synthesis of novel N-phosphorylated iminophosphoranes and their application in flame-retardant epoxy resin

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-03-03 DOI: 10.1016/j.jtice.2025.106064

Chenpeng Ji , Liping Jin , Shuhan Ye , Lei Liu , Yubo Chen , Lingxing He , Wei Wang , Kun Qian , Wenwen Guo

Background

Epoxy resin, one of the most commonly used thermosetting materials, suffers from the more obvious defect of being flammable.

Methods

In this work, three new types of N-phosphorylated iminophosphorane based on phosphorous compounds containing different phosphorus oxidation states (DPP-N-TMP, DOPO-N-TMP and DPPO-N-TMP) was successfully synthesized via the one-pot “Atherton-Todd and Staudinger reactions” approachs, and then introduced separately into EP matrix.

Significant findings

TGA results indicated that the incorporation of these three N-phosphorylated iminophosphoranes can prominently enhance the thermal stability at high temperature. Especially the char yield of EP/2.5 %DPP-N-TMP, EP/5 %DPP-N-TMP and EP/10 %DPP-N-TMP was gradually enhanced from 7.6 % of pure EP to 17.6 %, 22.7 % and 25.2 %, respectively. Notably, EP/10 %DPP-N-TMP possessed a relatively high LOI value of 29.0 % and passed V0 rating in UL-94 test, while EP/10 %DOPO-N-TMP (LOI∼27.5 %) and EP/10 %DPPO-N-TMP (LOI∼24.0 %) only displayed V1 and NR rating respectively. As for cone test results, EP/10 %DPP-N-TMP exhibited the most significant reduction of 63.8 % in PHRR and its THR was also remarkably reduced by 54.5 % compared to the neat EP. The analysis implied that EP/10 %DPP-N-TMP possessed the best flame retardant performance due to its higher phosphorus oxidation state, conducive to forming char layers, which improved fire retardancy.

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引用次数: 0

Numerical analysis of a gas-solid vortex dryer integrated with a waste heat recovery system

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-03-03 DOI: 10.1016/j.jtice.2025.106037

Pavitra Singh , E. Hemachandran , Umesh Prasad , Kamlesh Kumar Singh , B. Mallik

The gas-solid vortex (GSV) dryer is considered to be very ideal for grain drying since it is characterized by a better transfer of heat and mass transfer capabilities. To improve this dryer for grain drying application, an enhanced version is proposed, which was the integration of a GSV dryer with a waste heat recovery (WHR) system. This would recycle waste heat during the initial drying phase and improve the overall efficiency of drying. Both numerical simulation and experimental validation were conducted on the enhanced dryer. The Eulerian-Eulerian approach was used to analyze numerically by ANSYS FLUENT 14.5. Dryer performance was assessed at different conditions, including temperatures of 328 K, 333 K, and 338 K; air velocities between 25 and 35 m/s; and solid feed amounts ranging from 500 to 1500 g. Waste heat recovery in the GSV dryer improved the efficiency of drying considerably by an increase of 29.7 %. This enhancement optimizes energy use and reduces operational costs, making the GSV dryer with the WHR system a more sustainable and cost-effective solution for grain drying.

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引用次数: 0

Integration of bacteria-imprinted polymer with aluminium transducers: Polymeric electrical behaviour to ionic species

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-03-02 DOI: 10.1016/j.jtice.2025.106061

Sing-Mei Tan , Subash C.B. Gopinath , Mohd Luqman Hakim Abdul Ghani , Hemavathi Krishnan , Jia-Chun Lim , Emily M.Y. Chow , Pachaiappan Raman

Background

Confronted with escalating public health issues exacerbated by bacterial infections, introducing a cost-effective and reliable approach for rapid bacteria detection is imperative.

Methods

In this research, bacteria-imprinted polymers (BIPs) technology targeting Bacillus subtilis was developed and characterised with Raman Spectroscopy and Fourier Transform Infrared Spectroscopy (FTIR). The BIPs were then incorporated into our newly designed capsula capacitive proximity electrode (CapCPE) sensor. Successful deposition of BIPs was validated by scanning electron microscopy (SEM), while the average thickness of the BIP coating was recorded as ∼ 3.0 µm. The current responses of both the bare device and BIP-CapCPE to different pH levels were examined.

Significant Findings

The results revealed that the bare device generated a maximum current of 7.55×10⁻⁴ A in a highly acidic medium. In contrast, the BIP-coated device exhibited a maximum current of 1.0 × 10⁻⁴ A in a highly alkaline medium, attributed to increased charge carrier density from the carboxyl group deprotonation in recognition cavities. Moreover, the mechanistic insights into the impact of strong electrolytes on BIP-coated electronic sensors were further proposed and elucidated. Electrochemical impedance spectroscopy (EIS) was additionally employed to reveal the impedimetric and capacitive behaviours of the devices in varied pH media.

{"title":"Integration of bacteria-imprinted polymer with aluminium transducers: Polymeric electrical behaviour to ionic species","authors":"Sing-Mei Tan , Subash C.B. Gopinath , Mohd Luqman Hakim Abdul Ghani , Hemavathi Krishnan , Jia-Chun Lim , Emily M.Y. Chow , Pachaiappan Raman","doi":"10.1016/j.jtice.2025.106061","DOIUrl":"10.1016/j.jtice.2025.106061","url":null,"abstract":"<div><h3>Background</h3><div>Confronted with escalating public health issues exacerbated by bacterial infections, introducing a cost-effective and reliable approach for rapid bacteria detection is imperative.</div></div><div><h3>Methods</h3><div>In this research, bacteria-imprinted polymers (BIPs) technology targeting <em>Bacillus subtilis</em> was developed and characterised with Raman Spectroscopy and Fourier Transform Infrared Spectroscopy (FTIR). The BIPs were then incorporated into our newly designed capsula capacitive proximity electrode (CapCPE) sensor. Successful deposition of BIPs was validated by scanning electron microscopy (SEM), while the average thickness of the BIP coating was recorded as ∼ 3.0 µm. The current responses of both the bare device and BIP-CapCPE to different pH levels were examined.</div></div><div><h3>Significant Findings</h3><div>The results revealed that the bare device generated a maximum current of 7.55×10<sup>−4</sup> A in a highly acidic medium. In contrast, the BIP-coated device exhibited a maximum current of 1.0 × 10<sup>−4</sup> A in a highly alkaline medium, attributed to increased charge carrier density from the carboxyl group deprotonation in recognition cavities. Moreover, the mechanistic insights into the impact of strong electrolytes on BIP-coated electronic sensors were further proposed and elucidated. Electrochemical impedance spectroscopy (EIS) was additionally employed to reveal the impedimetric and capacitive behaviours of the devices in varied pH media.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"171 ","pages":"Article 106061"},"PeriodicalIF":5.5,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Designing of ternary double Z-scheme Ni3(VO4)2/Cu2O/CoMoS2 nano-heterojunction for visible light-induced photocatalytic degradation of levofloxacin: Kinetics, degradation pathway and toxicity assessment

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-03-01 DOI: 10.1016/j.jtice.2025.106017

S. Sudheer Khan , J.P. Steffy , M. Swedha , Asad Syed , Abdallah M. Elgorban , Islem Abid , Ling Shing Wong

Background

The extended presence of antibiotics in the environment is a significant concern due to its potential impact on ecological systems and human health. Unlike many other environmental pollutants, antibiotics are intentionally designed for stability and effectiveness within the human body. However, this advantageous characteristic can lead to their prolonged existence and resistance to breakdown in environmental settings.

Methods

In this investigation, we utilize nanomaterials such as CoMoS₂, Cu₂O, and Ni₃(VO₄)₂ to intricately engineer a double Z-scheme nano-heterojunction Ni₃(VO₄)₂/Cu₂O/CoMoS₂, aiming to enhance the photocatalytic degradation efficiency of levofloxacin (LVF). The materials were synthesized by chemical co-precipitation and solvothermal method.

Significant findings

Scanning electron microscopy and elemental mapping reveals the nanocluster morphology, amorphous nature, and successful formation of heterojunctions. X-ray diffraction studies confirm the purity of the synthesized materials, while X-ray photoelectron spectroscopy validates their chemical states and bonding nature. Brunauer–Emmett–Teller analyses demonstrate an increased surface area and mesoporous nature of the NCs. UV–visible DRS illustrates the successful sensitization of NCs to visible light, exhibiting a bandgap of 2.30 eV. Furthermore, PL studies indicate reduced charge carrier recombination in the NCs, and ESR validates enhanced reactive oxygen species (ROS) production during photocatalysis, including O₂^.- and ^.OH. The photocatalyst achieved a remarkable 99.07 % photocatalytic elimination of LVF. Interestingly, these NCs show good stability over several cycles and prolonged activity in the presence of ions. Furthermore, gas chromatography-mass spectrometry study reveals possible LVF degradation pathway and formation of non-hazardous end products.

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引用次数: 0

The physicochemical characterization of diesel-like fuels derived from plastic waste pyrolysis

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-02-28 DOI: 10.1016/j.jtice.2025.106040

Preecha Moonsin , Wuttichai Roschat , Sunti Phewphong , Sittichai Watthanalao , Phiriyakorn Chaona , Bunterm Maneerat , Supakorn Arthan , Aekkaphon Thammayod , Tappagorn Leelatam , Keyoon Duanguppama , Boonyawan Yoosuk , Pathompong Janetaisong , Vinich Promarak

Background

This research investigates liquid fuel derived from the pyrolysis of plastic waste as a renewable biofuel for diesel engines, particularly in agricultural machinery. The study addresses waste management challenges while exploring sustainable energy solutions.

Methods

Pyrolysis at 500 °C in a non-catalytic process produced over 63 ± 2 wt% liquid fuel. Activated carbon treatment enhanced fuel quality by removing particles, yielding activated carbon-treated waste plastic pyrolysis oil (P-WPPO) with a slightly reduced yield of 85 ± 3 wt%. Advanced techniques, including ¹H-NMR, ¹³C-NMR, FT-IR, and GC–MS, were employed for chemical analysis, while fuel properties were assessed against EN-14214 and ASTM-D6751 standards. Thermal degradation behavior was evaluated using TGA.

Significant findings

Both crude and treated P-WPPO contained approximately 99 % hydrocarbons, predominantly unsaturated compounds, with a heating value of 10,907 ± 67 kcal/kg, only 1.60 % lower than B10 diesel. Thermal decomposition occurred between 40 and 250 °C, completing at 550 °C. P-WPPO demonstrated excellent potential as a renewable and energy-dense diesel substitute. This research underscores the dual benefits of mitigating plastic waste pollution and producing sustainable fuels, advancing innovative waste-to-energy strategies.

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引用次数: 0

Octahedral Cu2O immobilized on carbonized wood as a self-supporting photocatalyst for boosting methyl orange degradation

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-02-28 DOI: 10.1016/j.jtice.2025.106069

Qingtong Zhang , Xiaoxuan Zhang , Yuanyuan Yu , Chen Chen , Hewei Hou , Jierui Wei , Shuangfei Wang , Douyong Min

Background

Photocatalytic degradation is a sustainable method for environmental pollution treatment, but recycling powdered photocatalysts remains a challenge.

Method

In this work, we decorated Cu₂O onto the porous carbonized wood (Cu₂O/CW) which was used as a photocatalyst for the efficient photocatalytic degradation of Methyl orange. The designed Cu₂O/CW effectively overcomes the recycling challenges of powdered photocatalysts, exhibiting self-floating properties that enhance its light and oxygen exposure, thereby improving photocatalytic efficiency. After four cycles, the photocatalytic degradation efficiency of Cu₂O/CW decreased by only 3 %, while that of Cu₂O declined by 24 %.

Significant findings

The mechanism of photogenerated electron transfer facilitated by carbonized wood in Cu₂O/CW was revealed by free radical quenching experiments and transient photocurrent response. This study offers insights into addressing photocatalyst particle aggregation and deactivation, as well as the high-value utilization of woody raw materials.

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引用次数: 0

Effects of flow field designs on performance characteristics of vanadium redox flow battery

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-02-28 DOI: 10.1016/j.jtice.2025.106043

Tien-Fu Yang , Yu-Kai Chen , Cong-You Lin , Wei-Mon Yan , Saman Rashidi

Background

Energy storage is a critical area in today's world, despite the shift towards renewable energy sources. The instability and intermittency of energy remain highly challenging. Vanadium redox flow batteries (VRBs), with their flexible design, fast response time, and long cycle life, offer an efficient energy storage solution. Over the past few years, they have been widely applied and developed in large-scale energy storage systems. VRBs offer higher safety compared to lithium batteries. However, previous studies on these batteries have primarily focused on the influence of material usage on battery performance, with the design of flow field structures also being a key factor.

Methods

In this study, models of VRBs with interdigitated, parallel, and serpentine (1, 2, 4 channels) flow channels were established. The study analyzes the effects of different flow channels, electrolyte flow rates, and applied current densities on the battery performance. Additionally, it explores the performance of batteries with different geometric configuration parameters of the flow channels and rib width ratios.

Significant Findings

The results indicate that the performance of batteries with a serpentine channel (single-channel) surpasses those with serpentine two-channels, serpentine four-channels, interdigitated, and parallel flow channel designs. It was found that the geometry ratio of W_c:W_r = 1:2 for flow channels and rib widths is the optimal structural combination among the three geometric configurations. Additionally, it is observed that at low electrolyte flow rates, the flow rate has a significant impact on the performance of these batteries. This phenomenon is caused by the ion diffusion rate inside the electrode being unable to meet the electrochemical reaction rate.

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引用次数: 0

An interfacial networked self-cleaning membrane based on 2D/2D C-g-C3N4/BiVO4 heterojunction for photocatalytic degradation of tetracycline

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-02-27 DOI: 10.1016/j.jtice.2025.106056

Yanhua Cui , Yixuan Hong , Weilong Shi , Zengkai Wang

Background

Photocatalytic membrane technology has attracted widespread concern in the field of water purification due to its high-efficiency and eco-friendly. However, the active sites of photocatalyst are easily embedding in the polymer membrane, consequently reducing degradation efficiency of photocatalytic membrane.

Methods

In this study, two-dimensional/two-dimensional regenerated silk fibroin-carbonized carbon modified graphite carbon nitride/bismuth vanadate heterojunction (2D/2D C-g-C₃N₄/BiVO₄) with excellent photocatalytic performance was synthesized by electrostatic self-assembly method. Then C-g-C₃N₄/BiVO₄ heterojunction was selected as catalytic structural units, three-dimensional (3D) interfacial networked poly(vinylidene fluoride) membrane-supported C-g-C₃N₄/BiVO₄ heterojunction (C-g-C₃N₄/BiVO₄/PVDF) was fabricated by electrospinning technique. The combination of C-g-C₃N₄/BiVO₄ heterojunction and interfacial networked PVDF membrane synergistically enhanced their permeability, antifouling and antibacterial performance.

Significant findings

The optimized C-g-C₃N₄/BiVO₄/PVDF photocatalytic membrane had higher degradation TC efficiency (83.33 %) than other membrane samples, and the efficiency of bacterial inactivation of C-g-C₃N₄/BiVO₄/PVDF could reach 99.00 %. The C-g-C₃N₄/BiVO₄/PVDF exhibited tremendous enhancement in the permeability (13,488.2 L m⁻² h⁻¹) and flux recovery efficiency (94.44 %). The free radical trapping tests and ESR spectra indicated that superoxide radical (·O₂^⁻) was the dominant active species. In addition, the as-prepared C-g-C₃N₄/BiVO₄/PVDF could easily recover and reuse, and photocatalytic activity basically remain unchanged, highlighting the potential application of membrane photocatalyst for the practical wastewater treatment.

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引用次数: 0