Journal of the Taiwan Institute of Chemical Engineers最新文献

Cellulose nanocrystals/zeolitic imidazolate framework-L (CNCs/ZIF-L) composites for loading and diffusion-controlled release of doxorubicin hydrochloride 用于盐酸多柔比星负载和扩散控制释放的纤维素纳米晶/唑基咪唑酸框架-L（CNC/ZIF-L）复合材料

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-11-15 DOI: 10.1016/j.jtice.2024.105831

Christian J. Wijaya , Sandy B. Hartono , Jindrayani N. Putro , Juliana Anggono , Tarzan Sembiring , Herlian E. Putra , Maria Yuliana , Jenni Lie , Shella P. Santoso , Chien-Yen Chen , Felycia E. Soetaredjo , Suryadi Ismadji , Setiyo Gunawan

Background

Zeolitic imidazolate framework-L (ZIF-L) has great potential as a doxorubicin hydrochloride (DOX) drug carrier for oral chemotherapy applications. This medical application will greatly support the development of cancer treatment and reduce the cancer fatality rate. However, ZIF-L as a type of metal-organic framework (MOFs) faces several challenges to be implemented in biomedical applications which impact the drug loading and release mechanisms.

Methods

CNCs/ZIF-L composites were fabricated via a green in-situ method using CNCs mass percentages of 2.5, 5, 7.5, and 10 % of Zn(NO₃)₂·6H₂O. All composites were tested for the DOX loading and release mechanisms and antioxidant activity.

Significant findings

Here, the addition of CNCs enhances the DOX loading capacity of CNCs/ZIF-L composite up to 1508.91 ± 7.72 mg/g due to the presence of abundant active functional groups. In addition, the DOX release profile is another interesting potential that occurs through a diffusion-controlled release mechanism. This shows the ability of CNCs/ZIF-L composite to deliver drugs orally where DOX is released consistently at a certain concentration level for prolonged treatment. Moreover, the IC₅₀ value of DOX@CNCs/ZIF-L drug reaching 480.21 mg/L proves that the effectiveness of DOX is maintained even though it is administered orally in the form of solid material.

背景沸石咪唑盐酸盐框架-L（ZIF-L）作为盐酸多柔比星（DOX）药物载体在口服化疗应用方面具有巨大潜力。这一医疗应用将极大地支持癌症治疗的发展并降低癌症死亡率。然而，作为一种金属有机框架（MOFs），ZIF-L 在生物医学应用中面临着一些挑战，这些挑战影响了药物的负载和释放机制。重要发现由于存在丰富的活性官能团，CNCs 的加入提高了 CNCs/ZIF-L 复合材料的 DOX 负载能力，达到 1508.91 ± 7.72 mg/g。此外，DOX 释放曲线是另一个有趣的潜力，它是通过扩散控制释放机制实现的。这表明 CNCs/ZIF-L 复合材料具有口服给药能力，可在一定浓度水平上持续释放 DOX，从而延长治疗时间。此外，DOX@CNCs/ZIF-L 药物的 IC50 值达到 480.21 mg/L，这证明即使以固体材料的形式口服 DOX，其药效仍能保持。

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引用次数: 0

Optimization and sensitivity analysis of magnetic fields on nanofluid flow on a wedge with machine learning techniques with joule heating, radiation and viscous dissipation 利用机器学习技术优化磁场对楔形纳米流体流动的影响并进行敏感性分析，同时考虑焦耳加热、辐射和粘性耗散问题

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-11-15 DOI: 10.1016/j.jtice.2024.105813

Muhammad Ibrahim , Ebrahem A. Algehyne , Fahad Sikander , Vakkar Ali , Shahid Ali Khan , Syed Ibrahim , S.A. Abd El-Azeem

Purpose

In this study, the flow of nanofluids (NFDs), consisting of water and copper nanoparticles over a wedge, is simulated. The analysis considers the effects of a magnetic field (MFD) and Joule heating (JOH). Variables such as nanoparticle volume fraction (NVF), Eckert number (EC), radiation, and wedge angle (BT) are also examined for their impacts on the Nu and C_f.

Design/methodology/approach

The simulation utilizes the similarity method and the Keller box method, implemented through custom coding. Additionally, machine learning techniques are applied for sensitivity analysis and optimization of the results by varying the parameters.

Findings

The findings indicate that increasing the BT, NVF and MFD strength can elevate the average friction coefficient (Cf-m) by up to 42.8 %. Sensitivity analysis reveals that factors like BT and MFD significantly influence the Cf-m and Nu. An increase in MFD strength generally reduces the Nu-m. A larger BT substantially boosts the Nu-m; however, heightened JOH results in a sharp decline in the Nu. An increase in the EC leads to a decrease in the Nu-m. At low radiation parameter (RD) values, increasing this parameter reduces the Nu-m, whereas at higher values, it increases the Nu.

Originality/value

The key contribution of the article is the optimization and sensitivity analysis of NFD flow over a surface, considering the effects of a MFD, JOH, radiation, EC, and BT. This is done to achieve maximum heat transfer and minimum friction loss.

目的本研究模拟了由水和纳米铜粒子组成的纳米流体（NFDs）在楔形上的流动。分析考虑了磁场（MFD）和焦耳加热（JOH）的影响。还研究了纳米粒子体积分数 (NVF)、埃克特数 (EC)、辐射和楔角 (BT) 等变量对 Nu 和 Cf 的影响。研究结果研究结果表明，增加 BT、NVF 和 MFD 强度最多可将平均摩擦系数 (Cf-m) 提高 42.8%。敏感性分析表明，BT 和 MFD 等因素对 Cf-m 和 Nu 有显著影响。MFD 强度的增加通常会降低 Nu-m。更大的 BT 会大幅提高 Nu-m；然而，JOH 的增加会导致 Nu 的急剧下降。EC 的增加会导致 Nu-m 的下降。在辐射参数 (RD) 值较低时，增加该参数会降低 Nu-m，而在辐射参数 (RD) 值较高时，则会增加 Nu。这样做是为了实现最大的热传递和最小的摩擦损失。

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引用次数: 0

Decoration of mesoporous hydroxyapatite nanorods by CdSe and PtO nanoparticles for enhanced photocatalytic oxidation of antibiotic pollutant in water 用 CdSe 和 PtO 纳米粒子装饰介孔羟基磷灰石纳米棒以增强对水中抗生素污染物的光催化氧化作用

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-11-14 DOI: 10.1016/j.jtice.2024.105818

Adel A. Ismail , L.A. Al-Hajji , Ahmed Mohamed El-Toni , Mohd. Arif

Background

A large variety of antibiotic pollutants in water sources has been detected being a worldwide concern. The photocatalytic process is promising to degrade the organic compound under illumination in the presence of semiconductor photocatalysts

Method

Design and synthesis of innovative of mesoporous hydroxyapatite (HAP) nanorods with a high surface area was achieved through the dual surfactant-assisted sol-gel approach. Then, HAP nanorods were decorated by CdSe and PtO nanocrystals as active visible-photocatalyst to degrade Ciprofloxacin (CPF) as a pollutant model

Significant Findings

The novel photocatalyst exhibited an absorption edge at 712 nm with estimated bandgap energy of 1.77 eV The PtOCdSe/HAP nanocomposite highly improved the photocatalytic ability towards degradation CPF by suppressing the recombination of electrons and holes and boosting the absorption in wide visible spectra. The photocatalytic ability of optimal PtOCdSe/HAP photocatalyst demonstrated a maximum degradation of 100 % after 30 min of illumination time, much larger than those of CdSe (44 %) and CdSe/HAP (82 %). The PtOCdSe/HAP photocatalyst showed an enhanced rate constant of 0.0359 min^–1 which is larger 4.488 and 1.768 times compared to pure CdSe (0.008 min^–1) and CdSe/HAP (0.0203 min^–1). This enhanced photocatalytic ability of PtOCdSe/HAP nanocomposite is interpreted by the synergetic effect between PtO and CdSe, large surface area with pores structure and efficient charge separation of the photocharge carriers. The reused nanocomposite showed a slight reduction in the photocatalytic ability (98.5 %) within five consecutive cycles, demonstrating its quite stability. This work opens the gate for the design of HAP-based photocatalysts for antibiotic removal under solar energy.

背景在水源中检测到的大量抗生素污染物已成为全球关注的问题。在半导体光催化剂的作用下，光催化过程有望在光照下降解有机化合物。方法通过双表面活性剂辅助溶胶-凝胶法，设计并合成了创新的高比表面积介孔羟基磷灰石（HAP）纳米棒。该新型光催化剂在 712 纳米波长处显示出吸收边缘，带隙能估计为 1.PtOCdSe/HAP 纳米复合材料抑制了电子和空穴的重组，提高了在宽可见光谱范围内的吸收率，从而大大提高了降解 CPF 的光催化能力。最佳 PtOCdSe/HAP 光催化剂的光催化能力在光照 30 分钟后的最大降解率为 100%，远高于 CdSe（44%）和 CdSe/HAP（82%）。PtOCdSe/HAP 光催化剂的增强速率常数为 0.0359 min-1，分别是纯 CdSe（0.008 min-1）和 CdSe/HAP （0.0203 min-1）的 4.488 倍和 1.768 倍。PtOCdSe/HAP 纳米复合材料光催化能力的增强主要得益于 PtO 和 CdSe 的协同效应、大表面积的孔隙结构以及光电载流子的高效电荷分离。重复使用的纳米复合材料在连续五个周期内的光催化能力略有下降（98.5%），这表明其具有相当高的稳定性。这项工作为设计基于 HAP 的光催化剂在太阳能下去除抗生素打开了大门。

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引用次数: 0

Biochar from residues of anaerobic digestion and its application as electrocatalyst in Zn–air batteries 厌氧消化残渣中的生物炭及其在锌-空气电池中作为电催化剂的应用

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-11-14 DOI: 10.1016/j.jtice.2024.105826

Konstantinos Pergamalis , Charalampos Chaliotis , Antonios–Alkinoos Papadopoulos , Natalia Tsoukala , Angelos Amoiridis , John Vakros , Lamprini Sygellou , Eleana Kordouli , Katerina Govatsi , Michael Kornaros , Ioannis D. Manariotis , Anastasios Keramidas , Dionissios Mantzavinos , Panagiotis Lianos

Background

Biochar, the product obtained by pyrolysis of biomass, is a new eco-friendly material with excellent properties and many promising applications. Among them it can be used as cathode in Zn-air batteries with very satisfactory results

Methods

The residue was obtained by anaerobic digestion of a mixture of corn silage (10%), malt (10%), and cattle manure (80%), aiming to biogas production. It was first freeze–dried and then it was subjected to pyrolysis up to 800^oC.

Significant findings

The biochar was physicochemically characterized. It has moderate specific surface area, sufficient sp²/sp³ ratio and metal and non–metal surface chemical species. The biochar demonstrated satisfactory electrocatalytic performance, both as oxygen reduction and oxygen evolution catalyst. When applied as electrocatalyst in Zn–air batteries it reached an open–circuit potential of 1.45 V, a short–circuit current density of 200 mA cm^–2 and maximum power density of around 62 mW cm^–2. Its energy density was 927 Wh kg^–1, (at 20 mA), and 518 Wh kg^–1 (at 100 mA). In a charge–discharge mode at 10 mA, the potential varied between 1.35 and 1.90 V. These data, show that the waste biomass can be used as inexpensive material for Zn–air batteries and offers a useful approach to combine waste management with energy storage.

背景生物炭是生物质热解的产物，是一种新型的环保材料，具有优良的性能和广阔的应用前景。其中，它可用作锌-空气电池的阴极，效果非常令人满意方法残渣是通过厌氧消化玉米青贮（10%）、麦芽（10%）和牛粪（80%）的混合物获得的，目的是生产沼气。首先对其进行冷冻干燥，然后在 800 摄氏度的高温下进行热解。它具有适度的比表面积、足够的 sp2/sp3 比率以及金属和非金属表面化学物种。作为氧还原和氧进化催化剂，生物炭的电催化性能令人满意。在锌-空气电池中用作电催化剂时，它的开路电位为 1.45 V，短路电流密度为 200 mA cm-2，最大功率密度约为 62 mW cm-2。其能量密度为 927 Wh kg-1（20 mA 时）和 518 Wh kg-1（100 mA 时）。这些数据表明，废弃生物质可用作锌空气电池的廉价材料，并为废物管理与能源储存相结合提供了一种有用的方法。

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引用次数: 0

Fabrication of tannic acid-(3-amino)propyltriethoxysilane with zwitterionic carbon quantum dots coating on cellulose acetate tubular membrane for oil-water emulsion separation 在醋酸纤维素管状膜上涂布单宁酸-(3-氨基)丙基三乙氧基硅烷与齐聚物碳量子点，用于油水乳液分离

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-11-08 DOI: 10.1016/j.jtice.2024.105821

John Paul D. Arcilla , Hong-Li Yang , Hsin-Yi Lin , Pei-Chen Chen , Rhoda B. Leron , Hui-An Tsai , Kueir-Rarn Lee

Background

The discharge of large volumes of oily wastewater from industries has been a serious global concern. In recent years, membrane filtration has been considered an effective method for treating oily wastewater. However, membrane fouling is a major challenge inherent to this approach.

Methods

This study integrated zwitterionic carbon quantum dots (ZQDs) into a tannic acid-(3-aminopropyl)triethoxysilane (TA-APTES) coating on cellulose acetate (CA) tubular membranes to explore the potential for improve the hydrophilicity and anti-fouling properties of the membrane. The CA tubular membrane was fabricated by dry/wet spinning method. A green and one-step synthesis of TA-APTES with ZQDs was utilized to modify the surface of the CA pristine membrane.

Significant findings

Incorporating ZQDs enhanced the membrane's hydrophilicity. Results showed that the modified membrane with ZQDs (CA/T_0.4A+ZQDs) displayed super hydrophilicity with a water contact angle of 12.53 ± 0.9°, pure water permeance of 987.13 ± 57.9 L m^-2 h^-1 bar^-1, diesel-water emulsion permeance of 577.10 ± 64.7 L m^-2 h^-1 bar^-1, and enhanced oleophobicity with oil rejection rate of > 99 %. Furthermore, the CA/T0.4A+ZQDs membrane showed the best anti-fouling property, with the highest flux recovery ratio (FRR), lowest irreversible fouling ratio (R_ir,1) of 94.98 % and 5.05 %, respectively and mechanical stability after 5 cycles of oil-water separation.

背景工业排放的大量含油废水一直是全球严重关切的问题。近年来，膜过滤被认为是处理含油废水的一种有效方法。本研究在醋酸纤维素（CA）管式膜的单宁酸-（3-氨基丙基）三乙氧基硅烷（TA-APTES）涂层中加入了齐聚物碳量子点（ZQDs），以探索提高膜的亲水性和防污性能的潜力。醋酸纤维素管状膜是用干/湿纺丝法制成的。重要发现ZQDs的加入增强了膜的亲水性。结果表明，含有 ZQDs 的改性膜（CA/T0.4A+ZQDs）具有超亲水性，水接触角为 12.53 ± 0.9°，纯水渗透率为 987.13 ± 57.9 L m-2 h-1 bar-1，柴油-水乳液渗透率为 577.10 ± 64.7 L m-2 h-1 bar-1，疏油性增强，油排斥率达 99%。此外，CA/T0.4A+ZQDs 膜的防污性能最好，通量恢复比（FRR）最高，不可逆污垢比（Rir,1）最低，分别为 94.98 % 和 5.05 %，并且在 5 次油水分离循环后具有机械稳定性。

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引用次数: 0

Degradation of methylene blue under visible-light with copper-doped cobalt oxide nanoparticles 用掺铜氧化钴纳米颗粒在可见光下降解亚甲基蓝

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-11-07 DOI: 10.1016/j.jtice.2024.105819

Jamshid Hussain , Abrar Hussain , Kuen-Song Lin , Najmul Hassan , Asad Abbas , Sayed Maeen Badshah , Ndumiso Vukile Mdlovu , Wajid Rehman

Background

The development of efficient photocatalysts is greatly essential to degrade organic pollutants such as methylene blue (MB). Copper-doped cobalt oxide nanoparticles (Cu-Co₃O₄ NPs) have shown promise in enhancing photocatalytic activities due to their unique structural and optical properties.

Method

A hydrothermal approach was employed to synthesize Cu-Co₃O₄ NPs with varying Cu concentrations for the degradation of MB. XRD confirmed the cubic structure of Co₃O₄ NPs, with crystallite sizes decreasing from 29 nm (pure Co₃O₄) to 20 nm (15 % Cu-doped Co₃O₄). The FE-SEM/TEM micrographs revealed distinct shapes and morphologies. Additional peaks of the used Cu-Co₃O₄ NPs indicated interactions with MB. XANES and EXAFS analyses indicated electron transitions and structural modifications due to increased lattice strain with higher Cu concentrations.

Significance finding

This study reveals that Cu-Co₃O₄ NPs exhibited great performance compared to pure Co₃O₄ NPs. The Cu doping in Co₃O₄ nanoparticles enhanced their photocatalytic activity, achieving the highest degradation efficiency of 89 % for MB in 90 min under visible light with 15 % Cu doping. The results indicate the potential of Cu-Co₃O₄ NPs for the degradation of MB, offering valuable insights into the underlying mechanisms and practical applications of these catalysts. The optical band gap decreased from 3.1 eV for undoped Co₃O₄ to 2.1 eV for 15 % Cu-doped Co₃O₄ but increased after degradation, demonstrating their potential applications for environmental cleanup.

背景开发高效光催化剂对于降解亚甲基蓝（MB）等有机污染物至关重要。铜掺杂的氧化钴纳米粒子（Cu-Co3O4 NPs）因其独特的结构和光学特性，在提高光催化活性方面前景广阔。XRD 证实了 Co3O4 NPs 的立方结构，结晶尺寸从 29 nm（纯 Co3O4）减小到 20 nm（掺杂 15 % Cu 的 Co3O4）。FE-SEM/TEM 显微照片显示了不同的形状和形态。所使用的 Cu-Co3O4 NPs 的其他峰值显示了与 MB 的相互作用。XANES 和 EXAFS 分析表明，随着铜浓度的升高，晶格应变增加，导致电子跃迁和结构改变。在 Co3O4 纳米粒子中掺入 15% 的 Cu 可增强其光催化活性，在可见光下 90 分钟内对甲基溴的降解效率达到 89%。研究结果表明，Cu-Co3O4 纳米粒子具有降解甲基溴的潜力，为研究这些催化剂的内在机理和实际应用提供了宝贵的见解。未掺杂 Co3O4 的光带隙从 3.1 eV 下降到掺杂 15% Cu 的 Co3O4 的 2.1 eV，但降解后光带隙又有所上升，这表明它们在环境净化方面具有潜在的应用价值。

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引用次数: 0

Self-powered piezoelectric ultraviolet photodetectors based on TiO2-NFs:P(VDF-TrFE) nanocomposites via ultraviolet-assisted thermal annealing for the prevention of ultraviolet overexposure 基于 TiO2-NFs:P(VDF-TrFE) 纳米复合材料的自供电压电紫外线光电探测器，通过紫外线辅助热退火防止紫外线过度照射

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-11-07 DOI: 10.1016/j.jtice.2024.105808

Jer-Chyi Wang , Tzu-Chuan Yang , Tzu-Wei Hsu , Ping-Jung Huang , Peng-Nang Chen , Chen-Yang Tseng , Ting-Han Lin , Jia-Mao Chang , Chang-Heng Liu , Wen-Ling Yeh , Ming-Chung Wu

Background

Ultraviolet (UV) radiation overexposure due to severe ozone layer depletion increases the risk of skin cancer. However, the traditional UV index meter needs the power supply which is not convenient for outdoor use. The study aims to develop a UV overexposure warning system with a self-powered piezoelectric UV photodetector to provide a real-time UV index.

Method

A self-powered piezoelectric UV photodetector with TiO₂-nanofibers (TiO₂-NFs)-doped poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) nanocomposite films via ultraviolet-assisted thermal annealing was fabricated. A lumped circuit was designed to realize the stepping illumination of light-emitting diodes (LEDs) under continuous tapping of self-powered piezoelectric UV photodetectors.

Significant Findings

At a fixed 40-kPa pressure and 2-Hz frequency with varying UV irradiation power densities, the self-powered piezoelectric UV photodetectors exhibited outstanding UV detection capabilities, with a responsivity and detectivity for 0.14 mA/W and 4 × 10⁸ Jones, respectively. A UV overexposure warning system was established by connecting a self-powered piezoelectric UV photodetector with a lumped circuit to achieve the stepping illumination of LEDs under continuous tapping, giving warnings for those performing outdoor activities to avoid UV overexposure.

背景由于臭氧层严重破坏，过度暴露于紫外线（UV）辐射会增加患皮肤癌的风险。然而，传统的紫外线指数仪需要电源，不方便在户外使用。方法通过紫外辅助热退火技术，用 TiO2 纳米纤维（TiO2-NFs）掺杂聚偏氟乙烯-三氟乙烯（P(VDF-TrFE)）纳米复合薄膜制作了自供电压电紫外线光电探测器。在固定的 40-kPa 压力和 2-Hz 频率条件下，随着紫外线辐照功率密度的变化，自供电压电紫外线光电探测器表现出卓越的紫外线检测能力，其响应率和检测率分别为 0.14 mA/W 和 4 × 108 Jones。通过将自供电压电紫外线光电探测器与叠加电路连接，建立了紫外线过曝警告系统，实现了 LED 灯在连续敲击下的步进式照明，为进行户外活动的人们提供了避免紫外线过曝的警告。

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引用次数: 0

Impact of low-grade iron ore on sintering reactions: Rapid heating experiments and thermodynamic modeling 低品位铁矿石对烧结反应的影响：快速加热实验和热力学建模

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-11-07 DOI: 10.1016/j.jtice.2024.105817

Ping-Chieh Cheng , Kai-Chun Chang , Jia-Shyan Shiau , Shih-Hsien Liu , Ker-Chang Hsieh , Shih-kang Lin

Background

Sinter is a primary feedstock for blast furnace-based ironmaking. Recently, the proportion of low-grade iron ore, which contains a high amount of gangue (mainly SiO₂), has been increasing in the sintering process. Therefore, the impact of increased SiO2 content on the quality of sinter needs to be clarified.

Methods

In this study, we designed a rapid-heating furnace to simulate the actual thermal profile of the sintering process. The effects of basicity values, sintering temperature, and atmosphere, on the microstructure and phase formation of the Fe₂O₃-CaO-SiO₂ ternary mixtures during sintering reactions, are investigated using X-ray diffractometry and scanning electron microscopy. The experimental results are analyzed using CALPHAD-type computational thermodynamics.

Significant findings

We found that solid-state reactions dominate at the lower temperature of 1250 °C, while liquid-assisted sintering occurs at the higher temperature (1300 °C). As the SiO₂ content in the sinter increases, the content of the calcium-ferrite bonding phase decreases, while the content of Ca₂SiO₄ and Fe₂O₃ increases. Regarding the role of the atmosphere, more calcium ferrite bonding phases form under a lower oxygen partial pressure compared to an ambient atmosphere, which facilitates the densification of the Fe₂O₃-CaO-SiO₂ sinter. In addition, a guideline for sintering operation with low-grade iron ore is proposed.

背景烧结矿是高炉炼铁的主要原料。近来，烧结过程中含有大量煤矸石（主要是 SiO2）的低品位铁矿石的比例不断增加。本研究设计了一个快速加热炉来模拟烧结过程的实际热曲线。使用 X 射线衍射仪和扫描电子显微镜研究了烧结反应过程中碱度值、烧结温度和气氛对 Fe2O3-CaO-SiO2 三元混合物微观结构和相形成的影响。我们发现，固态反应在较低温度（1250 °C）下占主导地位，而液态辅助烧结则发生在较高温度（1300 °C）下。随着烧结矿中 SiO2 含量的增加，钙铁结合相的含量减少，而 Ca2SiO4 和 Fe2O3 的含量增加。关于气氛的作用，与环境气氛相比，在较低的氧分压下会形成更多的钙铁氧体结合相，这有利于 Fe2O3-CaO-SiO2 烧结矿的致密化。此外，还提出了低品位铁矿石烧结操作指南。

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引用次数: 0

Efficient separation of methyl ethyl ketone and water azeotrope using hydrophobic amino acid ester ionic liquids 使用疏水性氨基酸酯离子液体高效分离甲乙酮和水共沸物

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-11-07 DOI: 10.1016/j.jtice.2024.105822

Jun Gao , Zhaohua Cheng , Lianzheng Zhang , Dongmei Xu , Yixin Ma , Yinglong Wang

Background

Methyl ethyl ketone (MEK), an essential organic solvent, is commonly produced via the n-butene method, where water emerges as the principal impurity. The conventional distillation processes, which are necessitated by the azeotropic behavior between MEK and water, result in a substantial expenditure of energy. As a result, liquid-liquid extraction represents a promising alternative for energy-efficient separation.

Methods

In this work, three hydrophobic amino acid ester ionic liquids L-phenylalanine ethyl ester bis(trifluoromethylsulfonyl) imide ([Phe][NTf₂]), L-leucine ethyl ester bis(trifluoromethylsulfonyl) imide ([Leu][NTf₂]) and L-valine ethyl ester bis(trifluoromethylsulfonyl) imide ([Val][NTf₂]) were utilized as extractants for separation of the binary azeotrope methyl ethyl ketone and water. The effects of extraction time, extraction temperature, mass ratio of MEK-water mixture to ionic liquid and initial concentration of MEK on extraction efficiency were investigated.

Significant findings

The results demonstrate that the ionic liquid [Phe][NTf₂] exhibits superior extraction ability for the separation of the azeotrope methyl ethyl ketone and water. The maximum extraction yield of 99.86 % was achieved with the optimum extraction conditions of extraction time, 10 min, extraction temperature, 293.15 K, mass ratio of mixture to ionic liquid, 1:1 and initial concentration of MEK, 20 %. In addition, the relationship between the structure of ionic liquids and their extraction performance was revealed by quantum chemical calculations of ionic liquids with MEK and water. These ionic liquids were positioned as promising environmentally friendly alternatives to traditional organic solvents for the recovery of MEK from aqueous solutions, providing valuable insights for industrial applications.

背景甲基乙基酮（MEK）是一种重要的有机溶剂，通常通过正丁烯法生产，其中水是主要的杂质。由于 MEK 与水之间的共沸行为，传统的蒸馏过程需要消耗大量能源。因此，液-液萃取是一种很有前景的节能分离替代方法。方法在这项工作中，三种疏水性氨基酸酯离子液体 L-苯丙氨酸乙酯双（三氟甲基磺酰基）亚胺（[Phe][NTf2]）、L-亮氨酸乙酯双（三氟甲基磺酰基）亚胺（[Leu][NTf2]）和L-缬氨酸乙酯双（三氟甲基磺酰基）亚胺（[Val][NTf2]）作为萃取剂，用于分离二元共沸物甲乙酮和水。结果表明，离子液体[Phe][NTf2]在共沸物甲乙酮和水的分离中表现出优异的萃取能力。在萃取时间为 10 分钟、萃取温度为 293.15 K、混合物与离子液体的质量比为 1:1、MEK 初始浓度为 20% 的最佳萃取条件下，萃取率最高，达到 99.86%。此外，离子液体与 MEK 和水的量子化学计算揭示了离子液体结构与其萃取性能之间的关系。这些离子液体被定位为从水溶液中回收 MEK 的传统有机溶剂的环保型替代品，为工业应用提供了宝贵的见解。

{"title":"Efficient separation of methyl ethyl ketone and water azeotrope using hydrophobic amino acid ester ionic liquids","authors":"Jun Gao , Zhaohua Cheng , Lianzheng Zhang , Dongmei Xu , Yixin Ma , Yinglong Wang","doi":"10.1016/j.jtice.2024.105822","DOIUrl":"10.1016/j.jtice.2024.105822","url":null,"abstract":"<div><h3>Background</h3><div>Methyl ethyl ketone (MEK), an essential organic solvent, is commonly produced via the n-butene method, where water emerges as the principal impurity. The conventional distillation processes, which are necessitated by the azeotropic behavior between MEK and water, result in a substantial expenditure of energy. As a result, liquid-liquid extraction represents a promising alternative for energy-efficient separation.</div></div><div><h3>Methods</h3><div>In this work, three hydrophobic amino acid ester ionic liquids L-phenylalanine ethyl ester bis(trifluoromethylsulfonyl) imide ([Phe][NTf<sub>2</sub>]), L-leucine ethyl ester bis(trifluoromethylsulfonyl) imide ([Leu][NTf<sub>2</sub>]) and L-valine ethyl ester bis(trifluoromethylsulfonyl) imide ([Val][NTf<sub>2</sub>]) were utilized as extractants for separation of the binary azeotrope methyl ethyl ketone and water. The effects of extraction time, extraction temperature, mass ratio of MEK-water mixture to ionic liquid and initial concentration of MEK on extraction efficiency were investigated.</div></div><div><h3>Significant findings</h3><div>The results demonstrate that the ionic liquid [Phe][NTf<sub>2</sub>] exhibits superior extraction ability for the separation of the azeotrope methyl ethyl ketone and water. The maximum extraction yield of 99.86 % was achieved with the optimum extraction conditions of extraction time, 10 min, extraction temperature, 293.15 K, mass ratio of mixture to ionic liquid, 1:1 and initial concentration of MEK, 20 %. In addition, the relationship between the structure of ionic liquids and their extraction performance was revealed by quantum chemical calculations of ionic liquids with MEK and water. These ionic liquids were positioned as promising environmentally friendly alternatives to traditional organic solvents for the recovery of MEK from aqueous solutions, providing valuable insights for industrial applications.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105822"},"PeriodicalIF":5.5,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652434","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

Enhanced photocatalytic activity of BB41 and ROM2R dyes using green synthesized NiO nanoparticles: A response surface methodology approach 利用绿色合成的氧化镍纳米粒子提高 BB41 和 ROM2R 染料的光催化活性：响应面方法学

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-11-06 DOI: 10.1016/j.jtice.2024.105816

M. Sivagami , D. Thirumalai , P.V. Satya Narayana , A. Murugeeswari , I.V. Asharani

Background

NiO NPs are recognized for their potential in catalysis, energy storage, and environmental remediation. Green synthesis using plant extracts, such as Cucumis maderaspatanus L. (CmL.) leaves, offers an eco-friendly approach. This study focuses on synthesizing and analyzing the structural, optical, and photocatalytic properties of Cm-NiO NPs.

Methodology

Cm-NiO NPs were synthesized using CmL. leaf extract and calcinated at 300, 500, and 700 °C. XRD confirmed a face-centered cubic structure. Band gap values were 3.36 eV at 300 °C, 2.98 eV at 500 °C, and 3.15 eV at 700 °C. TEM showed spherical particles of 17.81 nm. The point of zero charge (pH_pzc) was pH 7.95. The photocatalytic activity was tested on BB41 and ROM2R dyes under varying pH (4 – 10), dye concentrations (10 – 50 ppm), catalyst amounts (0.1 – 1.0 mg/mL), and light sources. Scavenger studies identified reactive compounds. Response surface methodology (RSM) optimized the degradation process. LC-MS analyzed degradation products, and ECOSAR software estimated their toxicity.

Significant Findings

Cm-NiO NPs showed high photocatalytic efficiency, degrading 93.60 % of BB41 and 88.76 % of ROM2R under UV light (250 W, 365 nm). The nanoparticles demonstrated a face-centered cubic structure and a pH_pzc of 7.95. RSM effectively optimized the process, and toxicity analysis suggested a potential for environmental applications.

背景氧化镍氮氧化物在催化、储能和环境修复方面的潜力已得到公认。利用植物提取物（如 Cucumis maderaspatanus L. (CmL.) 叶片）进行绿色合成是一种环保方法。本研究的重点是合成和分析 Cm-NiO NPs 的结构、光学和光催化特性。XRD 证实其为面心立方结构。带隙值在 300 °C 时为 3.36 eV，500 °C 时为 2.98 eV，700 °C 时为 3.15 eV。TEM 显示出 17.81 纳米的球形颗粒。零电荷点（pHpzc）为 pH 7.95。在不同的 pH 值（4 - 10）、染料浓度（10 - 50 ppm）、催化剂用量（0.1 - 1.0 mg/mL）和光源条件下，对 BB41 和 ROM2R 染料进行了光催化活性测试。清除剂研究确定了反应性化合物。响应面方法（RSM）优化了降解过程。LC-MS 对降解产物进行了分析，ECOSAR 软件对其毒性进行了估计。重要发现Cm-NiO NPs 显示出很高的光催化效率，在紫外光（250 W，365 nm）下降解了 93.60 % 的 BB41 和 88.76 % 的 ROM2R。纳米粒子呈现面心立方结构，pHpzc 为 7.95。RSM 有效地优化了工艺，毒性分析表明其具有环境应用潜力。

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引用次数: 0