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

Improved diffusion mapping combined with procrustes analysis for capturing local-global data structures in industrial process monitoring 改进的扩散映射与普氏分析相结合，用于捕捉工业过程监控中的局部-全局数据结构

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-08-31 DOI: 10.1016/j.jtice.2024.105747

Lingling Tong, Zhimin Lv

Background

Process monitoring, by providing early warnings of abnormal operating states resulting from process faults, facilitates the maintenance of normal production and ensures process safety. In the domain of industrial process monitoring, capturing the local-global structural features of data and acquiring an explicit mapping relationship for dimensionality reduction projection holds significant importance for online fault detection in industrial processes.

Methods

This study introduces an Improved Diffusion Mapping and Procrustes analysis (IDM-P) method for this purpose. Initially, considering the multiscale and correlation among industrial data features, the Mahalanobis distance is incorporated to improve the diffusion mapping algorithm. Utilizing this method allows for the concurrent capture of both local and global data structures, leading to a more efficient extraction of data-representative features, which enhances the accuracy of fault detection. Procrustes analysis is then used to obtain an explicit mapping matrix between high-dimensional data and low-dimensional manifolds, improving the efficiency of the key feature extraction of the new samples. Finally, this matrix is utilized to construct process monitoring statistics for fault detection.

Significant Findings

The method's effectiveness was validated through experiments on the TEP dataset and actual industrial data, demonstrating that IDM-P maintains higher accuracy and achieves optimal fault detection compared to other methods.

背景过程监控通过对过程故障导致的异常运行状态发出预警，有助于维持正常生产并确保过程安全。在工业过程监控领域，捕捉数据的局部-全局结构特征并获取明确的映射关系进行降维投影，对于工业过程中的在线故障检测具有重要意义。首先，考虑到工业数据特征的多尺度性和相关性，将马哈拉诺比距离（Mahalanobis distance）用于改进扩散映射算法。利用这种方法可以同时捕捉局部和全局数据结构，从而更有效地提取数据代表性特征，提高故障检测的准确性。然后，利用 Procrustes 分析法获得高维数据与低维流形之间的明确映射矩阵，从而提高新样本关键特征提取的效率。重要发现通过在 TEP 数据集和实际工业数据上的实验，验证了该方法的有效性，表明 IDM-P 与其他方法相比，保持了更高的准确性，并实现了最佳故障检测。

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引用次数: 0

Enhancing oxygen permeability and water content in silicone hydrogels through carboxylic acid and surfactant incorporation 通过加入羧酸和表面活性剂提高硅酮水凝胶的透氧性和含水量

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-08-31 DOI: 10.1016/j.jtice.2024.105745

Bo-Tau Liu, We-Chen Pan, Yi-Ting Lu, Kai-Ting Sun

Background

Silicone hydrogels are vital materials in fields like contact lenses, biomedicine, and electronic devices, prized for their unique properties including oxygen permeability and equilibrium water content (EWC). These features make them ideal for applications that require both breathability and moisture retention, enhancing their performance and comfort in various uses. Typically, enhancing the silicone content increases oxygen permeability but reduces EWC, creating a significant trade-off.

Methods

This study introduces an innovative approach using carboxylic acid and surfactant to address this challenge. The addition of carboxylic acid markedly boosts the EWC by increasing both freezable free water and bound water. Simultaneously, the surfactant enhances the connectivity within the silicone structure, mitigating the reduction in oxygen permeability and improving the material's ductility, which is often compromised by water absorption that restricts the motion of the silicone chains.

Significant findings

With these modifications, the silicone hydrogel achieves approximately 97 % transmittance at 550 nm, with oxygen permeability reaching 100.4 barrer and EWC at 58.4 %, representing improvements of 11.3 % and 61.3 %, respectively, compared to the original material. These results exceed many of the enhancements in silicone hydrogels previously reported in the literature.

背景硅水凝胶是隐形眼镜、生物医学和电子设备等领域的重要材料，因其独特的透氧性和平衡水含量（EWC）等特性而备受推崇。这些特性使它们成为需要透气性和保湿性的应用的理想材料，从而提高了各种用途的性能和舒适度。通常情况下，提高硅氧烷含量会增加透氧性，但会降低 EWC，这就需要做出重大权衡。添加羧酸可增加可冻结自由水和结合水，从而显著提高 EWC。同时，表面活性剂增强了硅氧烷结构内部的连通性，缓解了透氧性的降低，并改善了材料的延展性，而材料的延展性往往因吸水而受到影响，吸水限制了硅氧烷链的运动。重要发现通过这些改性，硅氧烷水凝胶在 550 纳米波长处的透射率达到约 97%，透氧性达到 100.4 巴，EWC 达到 58.4%，与原始材料相比分别提高了 11.3% 和 61.3%。这些结果超过了之前文献中报道的硅树脂水凝胶的许多改进。

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引用次数: 0

A green bulk modification for imparting a green VIPS membrane with antifouling properties 用于赋予绿色 VIPS 膜防污性能的绿色块体改性剂

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-08-29 DOI: 10.1016/j.jtice.2024.105731

Antoine Venault, Yi-Ling Wu, Wen Xin Yen, Yung Chang

Background

Membrane preparation and membrane modification processes have long involved the use of toxic solvents. The present work proposes to only use envrionmentally-friendly solvents for both the fabrication and the surface modification of hydrophobic microfiltration membranes. In addition, coating processes for membrane modification are essentially surface modification processes. However, spray-coating may be a suitable method for both surface and bulk modification.

Methods

After dissolving poly(vinylidene fluoride) in dimethylsulfoxide, membranes were formed by the vapor-induced phase separation process, and then modified using an aqeous solution of an amphiphilic copolymer containing poly(ethylene glycol) methyl ether methacrylate units. Then, a variety of physicochemical techniques were employed to characterize the membrane structure and prove the effectiveness of the surface/bulk modification. Antifouling tests in static and dynamic conditions were conducted.

Significant findings

It is possible to reduce the water contact angle of the top surface of the membrane from 135° to 0° and that of the bottom surface from 126° to 0° within <10 s, indicating successful hydrophilization of the membrane on the one hand, and top-to-bottom modification, despite solely exposing the top surface to the spray, on the other hand. This conclusion was confirmed by deidcated surface chemistry analyses. Besides, the membranes maintained their original highly porous and symmetric structure with light effects on surface porosity and pore size following the spray-coating process. The drasting improvement of hydrophilicity resulted in effective mitigation of fibrinogen adsorption (reduced by 85 %) and Escherichia coli adhesion (reduced by 86 %). Fouling during cyclic filtration involving a bacterial suspension was also effectively reduced with a flux recovery ratio of 53 % (against 37 % for a commercial hydrophilic membrane) and an irreversible flux decline ratio of 47 % (against 63 % for a commercial hydrophilic membrane) in the conditions of the test.

背景长期以来，膜制备和膜改性过程都需要使用有毒溶剂。本研究建议在疏水性微滤膜的制备和表面改性过程中只使用对环境无害的溶剂。此外，膜改性的涂层工艺本质上是表面改性工艺。方法将聚（偏氟乙烯）溶于二甲基亚砜后，通过气相诱导相分离过程形成膜，然后使用含有聚（乙二醇）甲基醚甲基丙烯酸酯单元的两性共聚物的水溶液进行改性。然后，采用多种物理化学技术对膜结构进行表征，并证明表面/主体改性的有效性。重要发现在 10 秒内，膜上表面的水接触角可从 135°降至 0°，膜下表面的水接触角可从 126°降至 0°，这一方面表明膜成功实现了亲水化，另一方面表明尽管仅将膜上表面暴露在喷雾中，但仍实现了从上到下的改性。这一结论得到了表面化学分析的证实。此外，在喷涂过程中，膜保持了原有的高多孔性和对称性结构，对表面孔隙率和孔径的影响较小。亲水性的显著改善有效地减少了纤维蛋白原吸附（减少了 85%）和大肠杆菌粘附（减少了 86%）。在涉及细菌悬浮液的循环过滤过程中，也有效减少了污垢，在测试条件下，通量恢复率为 53%（商用亲水膜为 37%），不可逆通量下降率为 47%（商用亲水膜为 63%）。

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引用次数: 0

Module-based machine learning models using sigma profiles of organic linkers to predict gaseous adsorption in metal-organic frameworks 基于模块的机器学习模型，利用有机连接体的西格玛曲线预测金属有机框架中的气体吸附情况

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-08-29 DOI: 10.1016/j.jtice.2024.105728

Ya-Hung Cheng , I-Ting Sung , Chieh-Ming Hsieh , Li-Chiang Lin

Background

Metal-organic frameworks (MOFs) have drawn considerable attention for their potential in adsorption applications, such as gas separation and storage. Machine learning (ML) augmented high-throughput screening approaches have emerged as an effective strategy to expedite the materials search. Traditionally, ML models developed to predict the adsorption properties of MOFs rely on various geometrical and chemical descriptors. While these descriptors are effective, they tend to be specific to each MOF's unique structure, completely omitting the modular nature of MOFs.

Methods

A new approach is proposed in this study: a modular descriptor based on the sigma profile of MOF organic linkers. These sigma profiles effectively represent the chemical environment of organic linkers. With these profiles as input features, we train extreme gradient boosting (XGBoost) models to predict the Henry's coefficient (K_H) of adsorption for hydrocarbons and acid gases in MOFs.

Findings

The results show that sigma profiles enhance the prediction accuracy and emerge as the most important features for hydrocarbon gases. This study highlights the potential of sigma profiles in developing accurate ML models for identifying optimal MOF adsorbents. Such an approach could also facilitate an inverse design of MOFs with targeted properties.

背景金属有机框架（MOFs）因其在气体分离和储存等吸附应用领域的潜力而备受关注。机器学习（ML）增强型高通量筛选方法已成为加快材料搜索的有效策略。传统上，为预测 MOFs 吸附特性而开发的 ML 模型依赖于各种几何和化学描述符。本研究提出了一种新方法：基于 MOF 有机连接体 sigma 曲线的模块化描述符。这些 sigma 曲线有效地代表了有机连接体的化学环境。结果结果表明，σ剖面提高了预测的准确性，并成为烃类气体最重要的特征。这项研究强调了σ剖面在开发精确的 ML 模型以确定最佳 MOF 吸附剂方面的潜力。这种方法还有助于反向设计具有目标特性的 MOF。

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引用次数: 0

Indium vacancy modulated BiVO4/ZnIn2S4 for photoelectrochemical production of ammonia 用于光电化学生产氨的铟空位调制 BiVO4/ZnIn2S4

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-08-27 DOI: 10.1016/j.jtice.2024.105724

Hongye Bai , Kangkang Jia , Pengjie Zhou , Lijing Liu , Xiaohong Wang , Weiqiang Fan

Background

Photoelectrochemical (PEC) reduction of nitrate to produce ammonia (NIRR) is a green strategy for converting waste NO₃⁻ into high-value chemicals. However, a lack of active sites and low selectivity still plague the single catalyst used to establish the PEC-NIRR system.

Methods

Here, we construct a BiVO₄/V_In-ZnIn₂S₄ (BVO/V_In-ZIS) heterostructure with indium vacancies. The introduction of indium vacancy significantly enhances the conversion of NO₃⁻ to NH₃ by augmenting active sites and fostering carrier separation via the creation of a built-in electric field.

Significant findings

NH₃ yield of BVO/V_In-ZIS heterostructure with moderate indium vacancy (BVO/V_In-ZIS-m) has been promoted to 15.26 μg h⁻¹ cm⁻² (BVO/V_In-ZIS-m), and NH₃ selectivity reaches 21.3 times that of NO₂⁻. The results of cyclic experiments further demonstrate that NH₃ yield of BVO/V_In-ZIS-m has remained 98.4% after five cycles, due to its excellent durability. Therefore, this work demonstrates that indium vacancy could significantly modulate the PEC performance of BiVO₄ to achieve an efficient NH₃ production.

背景光电化学（PEC）还原硝酸盐生成氨（NIRR）是一种将废弃 NO3- 转化为高价值化学品的绿色策略。方法在这里，我们构建了一种带有铟空位的 BiVO4/VIn-ZnIn2S4 (BVO/VIn-ZIS) 异质结构。重要发现中等铟空位的 BVO/VIn-ZIS 异质结构（BVO/VIn-ZIS-m）的 NH3 产率提高到 15.26 μg h-1 cm-2 （BVO/VIn-ZIS-m），NH3 选择性达到 NO2- 的 21.3 倍。循环实验的结果进一步证明，BVO/VIn-ZIS-m 的 NH3 收率在五个循环后仍保持在 98.4%，这得益于其出色的耐久性。因此，这项工作证明了铟空位可以显著调节 BiVO4 的 PEC 性能，从而实现高效的 NH3 生产。

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引用次数: 0

Facile construction of binary metal oxide heterojunction with hexagonal boron nitride nanohybrid electrocatalyst for the detection of flutamide 轻松构建用于检测氟他胺的二元金属氧化物异质结与六方氮化硼纳米杂化电催化剂

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-08-27 DOI: 10.1016/j.jtice.2024.105706

Thangavelu Sakthi Priya , Tse-Wei Chen , Shen-Ming Chen , Thangavelu Kokulnathan , Faheem Ahmed , Afzal Hussain , Mohamed Fahad Alajmi

Background

Flutamide (FU) is a potential anti-androgen drug significantly prescribed to all human beings. The high solubility and poor degradability of its metabolites can adversely affect the balance of the ecosystem. Therefore, developing an efficient and reliable technique to detect this pollutant is essential. Consequently, electrochemical sensors have been widely used for the monitoring of various real-world samples.

Methods

Hence, nickel-zinc oxide (NZO) with hexagonal boron nitride (h-BN) nanocomposite was prepared as a proficient electrocatalyst in FU detection. Several spectroscopic measurements were carried out to characterize the prepared materials. Our NZO/h-BN nanocomposite was utilized to modify the glassy carbon electrode (GCE) and its relative catalytic activity was scrutinized with impedance and various voltammetric techniques.

Significant findings

Based on the results, our NZO/h-BN/GCE sensor exhibited high conductance, appreciable linear ranges, low detection limit (0.002 μM), optimal sensitivity (2.149 µA µM⁻¹ cm⁻²), and high selectivity with good repeatability, and reproducibility results. Furthermore, the practical utility of the sensor was studied by monitoring FU in human and environmental samples. Based on the outcomes, our NZO/h-BN/GCE is a promising electrochemical platform for the detection of FU.

背景氟他胺（FU）是一种潜在的抗雄激素药物，是人类的主要处方药。其代谢物溶解度高、降解性差，会对生态系统的平衡产生不利影响。因此，开发一种高效可靠的技术来检测这种污染物至关重要。因此，电化学传感器已被广泛用于监测现实世界中的各种样本。方法因此，制备了镍锌氧化物（NZO）与六方氮化硼（h-BN）纳米复合材料，作为检测 FU 的高效电催化剂。对制备的材料进行了多项光谱测量，以确定其特性。研究结果表明，我们的 NZO/h-BN/GCE 传感器具有高电导率、可观的线性范围、低检测限（0.002 μM）、最佳灵敏度（2.149 µA µM-1 cm-2）、高选择性、良好的重复性和再现性。此外，通过监测人体和环境样本中的 FU，研究了该传感器的实用性。根据研究结果，我们的 NZO/h-BN/GCE 是一种很有前景的 FU 检测电化学平台。

{"title":"Facile construction of binary metal oxide heterojunction with hexagonal boron nitride nanohybrid electrocatalyst for the detection of flutamide","authors":"Thangavelu Sakthi Priya , Tse-Wei Chen , Shen-Ming Chen , Thangavelu Kokulnathan , Faheem Ahmed , Afzal Hussain , Mohamed Fahad Alajmi","doi":"10.1016/j.jtice.2024.105706","DOIUrl":"10.1016/j.jtice.2024.105706","url":null,"abstract":"<div><h3>Background</h3><p>Flutamide (FU) is a potential anti-androgen drug significantly prescribed to all human beings. The high solubility and poor degradability of its metabolites can adversely affect the balance of the ecosystem. Therefore, developing an efficient and reliable technique to detect this pollutant is essential. Consequently, electrochemical sensors have been widely used for the monitoring of various real-world samples.</p></div><div><h3>Methods</h3><p>Hence, nickel-zinc oxide (NZO) with hexagonal boron nitride (h-BN) nanocomposite was prepared as a proficient electrocatalyst in FU detection. Several spectroscopic measurements were carried out to characterize the prepared materials. Our NZO/h-BN nanocomposite was utilized to modify the glassy carbon electrode (GCE) and its relative catalytic activity was scrutinized with impedance and various voltammetric techniques.</p></div><div><h3>Significant findings</h3><p>Based on the results, our NZO/h-BN/GCE sensor exhibited high conductance, appreciable linear ranges, low detection limit (0.002 μM), optimal sensitivity (2.149 µA µM<sup>−1</sup> cm<sup>−2</sup>), and high selectivity with good repeatability, and reproducibility results. Furthermore, the practical utility of the sensor was studied by monitoring FU in human and environmental samples. Based on the outcomes, our NZO/h-BN/GCE is a promising electrochemical platform for the detection of FU.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105706"},"PeriodicalIF":5.5,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142083251","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

The catalytic deoxygenation reaction temperature and N2 gas flow rate influence the conversion of soybean fatty acids into Green Diesel 催化脱氧反应温度和 N2 气体流速对大豆脂肪酸转化为绿色柴油的影响

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-08-26 DOI: 10.1016/j.jtice.2024.105700

R.S.R.M. Hafriz , S.H. Habib , N.A. Raof , S.Z. Razali , R. Yunus , N.M. Razali , A. Salmiaton

Background

Green diesel is a promising alternative as a petroleum replacement given the worldwide demand for petroleum fuel. Environmental issues have drawn public attention and concerns towards advancing renewable energy development. A catalytic deoxygenation (deCOx) was carried out to produce green diesel from soybean oil (SO) using a low-cost NiO-doped calcined dolomite (NiOCD) catalyst.

Method

The structure, chemical composition and morphology of NiOCD were comprehensively characterized by XRF, BET, TPD-CO₂, SEM and TEM. In this study, the effect of two operating parameters, reaction temperature and flow rate of nitrogen, was discovered using a one-factor-at-a-time (OFAT) optimisation study. In addition, the life cycle cost analysis (LCCA) of stepwise catalyst preparation and green diesel production has been performed.

Significant findings

An optimal reaction temperature of 420 °C was found to provide the highest yield of green diesel (47.13 wt.%) with an 83.51% hydrocarbon composition. The ideal nitrogen flow rate, however, was found to be 50 cm³/min, which produced 41.80 wt.% of green diesel with an 88.63% hydrocarbon composition. The deoxygenation reaction was significantly impacted by both reaction temperature and nitrogen flow rate. According to LCCA, NiOCD catalyst has potential to lower the overall cost of producing green diesel compared to commercial zeolite catalysts.

背景鉴于全球对石油燃料的需求，绿色柴油是一种很有前途的石油替代品。环境问题引起了公众对可再生能源发展的关注和关切。方法通过 XRF、BET、TPD-CO2、SEM 和 TEM 对 NiOCD 的结构、化学成分和形态进行了全面表征。本研究采用一次一因素（OFAT）优化法研究了反应温度和氮气流速这两个操作参数的影响。重要发现最佳反应温度为 420 °C，绿色柴油产量最高（47.13 wt.%），碳氢化合物含量为 83.51%。理想的氮气流速为 50 cm3/min，可产生 41.80 wt.%的绿色柴油，碳氢化合物含量为 88.63%。脱氧反应受反应温度和氮气流速的影响很大。根据 LCCA，与商用沸石催化剂相比，NiOCD 催化剂有望降低生产绿色柴油的总体成本。

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引用次数: 0

Sheep bone powder modified PVDF membrane for highlyefficient oil-in-water emulsion separation 用于高效水包油型乳液分离的羊骨粉改性 PVDF 膜

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-08-26 DOI: 10.1016/j.jtice.2024.105730

Junshuang Zhang , Xingran Lao , Xiaofeng Jiang , Zonghang Li , Wenwen Feng , Lidan Chen

Background

The wetting properties and roughness modification of membrane surfaces are crucial for their application in emulsion separation. However, traditional membrane modification methods suffer from high cost, complex preparation, and secondary pollution.

Methods

In this study, a novel, simple, and economical interfacial engineering method was developed using tannic acid (TA), sodium alginate (SA), and sheep bone powder (BP) as raw materials. Through vacuum filtration, these materials were deposited onto polyvinylidene fluoride (PVDF) membrane to fabricate superhydrophilic/underwater superoleophobic filtration membrane (PDBS). BP induced surface roughness and wetting properties to the membrane, while preserving the porous structure of the substrate membrane. The complex formed by TA and SA encapsulated BP onto the surface of PVDF microfiltration membrane, enhancing its mechanical properties.

Significant Findings

The prepared membrane exhibited a membrane flux of 347 Lm⁻²h⁻¹ bar⁻¹ and a separation efficiency of 99.9 % for emulsified oil. Furthermore, after soaking in NaCl solution for 30 h, the membrane still showed excellent stability. Therefore, this study developed a new membrane surface modification strategy with promising application prospects in oily wastewater treatment.

背景膜表面的润湿性和粗糙度改性对其在乳液分离中的应用至关重要。本研究以单宁酸（TA）、海藻酸钠（SA）和羊骨粉（BP）为原料，开发了一种新颖、简单、经济的界面工程方法。通过真空过滤，将这些材料沉积到聚偏氟乙烯（PVDF）膜上，制成超亲水/水下超疏水性过滤膜（PDBS）。BP 使膜表面粗糙并具有润湿性，同时保留了基底膜的多孔结构。TA 和 SA 形成的复合物将 BP 包覆在 PVDF 微滤膜表面，增强了其机械性能。此外，在氯化钠溶液中浸泡 30 小时后，膜仍表现出卓越的稳定性。因此，这项研究开发了一种新的膜表面改性策略，在含油废水处理中具有广阔的应用前景。

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引用次数: 0

Rational design of amine-terminated terephthalate in bismuth metal-organic framework for boosting sunlight-catalytic removal of organic pollutants 合理设计金属有机铋框架中的胺封端对苯二甲酸酯，促进阳光催化去除有机污染物

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-08-26 DOI: 10.1016/j.jtice.2024.105725

Dhanaprabhu Pattappan , Chen-Jie Liao , Raju Suresh Kumar , Sivalingam Ramesh , Ramasamy Thangavelu Rajendra Kumar , Woochul Yang , Yuvaraj Haldorai , Yi-Ting Lai

Background

Bismuth-based metal-organic frameworks (Bi-MOFs) have garnered significant interest in energy and environment-related applications. Here, we report a Bi-MOFs synthesized by amino terephthalic acid (Bi-MOF (ATP)) and Bi-MOF (CAU-17), the developed Bi-MOF (ATP) shows exceptional photocatalytic efficiency in degrading both cationic and anionic pollutants, crystal violet (CV) fast green (FG) under solar light exposure.

Methods

The CAU-17 and Bi-MOF (ATP) were prepared by the solvothermal method. However, only the Bi-MOF (ATP) ability to absorb visible spectrum and degradation of pollutants can be attributed to several factors, including the diminished particle sizes, mitigated recombination of charge carriers, oxidation of nitrogen during photocatalytic reactions, and a favorable bandgap of positioning within the visible spectrum.

Significant findings

The Mott-Schottky plot and electron paramagnetic resonance analyses confirmed a Bi-MOF (ATP) generated free radicals (·O₂‾). The remarkable photocatalytic degradation of CV and FG can achieve 92 % and 95 %, respectively. Notably, the catalyst retains robust stability throughout reusability assessments, maintaining its degradation efficiency without compromising the integrity of its crystalline structure and morphology. This study sheds light on the promising potential of Bi-MOFs (ATP) as effective photocatalysts for pollution under solar light.

背景铋基金属有机框架（Bi-MOFs）在能源和环境相关应用领域引起了极大的兴趣。本文报道了一种由对苯二甲酸氨基合成的 Bi-MOFs（Bi-MOF (ATP)）和 Bi-MOF (CAU-17)，所开发的 Bi-MOF (ATP) 在太阳光照射下降解阳离子和阴离子污染物、晶紫（CV）和快绿（FG）方面都表现出优异的光催化效率。重要发现莫特-肖特基图和电子顺磁共振分析证实了 Bi-MOF (ATP) 产生了自由基（-O2‾）。CV 和 FG 的光催化降解率分别达到 92% 和 95%。值得注意的是，该催化剂在整个可重复使用性评估过程中都保持了强大的稳定性，在保持其降解效率的同时，其晶体结构和形态的完整性也没有受到影响。这项研究揭示了 Bi-MOFs (ATP) 作为有效的光催化剂在太阳光下处理污染的巨大潜力。

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引用次数: 0

Scaling down recombinant carbonic anhydrase isolation with immobilized metal ion chromatography (IMAC): Harnessing enzymatic carbon dioxide capture and mineralization 利用固定金属离子色谱法（IMAC）扩大重组碳酸酐酶的分离规模：利用酶捕获二氧化碳并使其矿化

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2024-08-24 DOI: 10.1016/j.jtice.2024.105727

Yi-Chuan Chang , Shen-Yuan Yang , Jia-Yih Lin , Nguyen The Duc Hanh , Penjit Srinophakun , Chen-Yaw Chiu , Bing-Lan Liu , I-Son Ng , Kuei-Hsiang Chen , Yu-Kaung Chang

Background

Human activities have led to increased atmospheric CO₂ levels, raising concerns about climate change. Carbonic anhydrase (CA) enzymes show promise for transforming CO₂ into valuable products like calcium carbonate (CaCO₃) through mineralization. Purifying and immobilizing CA enzymes on nanofiber membranes enhances their catalytic activity, enabling efficient CO₂ conversion and mineralization.

Methods

Recombinant CA was purified using immobilized metal affinity chromatography (IMAC), optimizing pH, biomass concentration, flow rate, and loading volume for maximum efficiency. The CA enzyme was then immobilized onto a weak ion exchange nanofiber membrane functionalized with AEA-COOH to create the CA-modified membrane (AEA-COOH-CA), enhancing CO₂ conversion and CaCO₃ mineralization.

Significant findings

Optimal purification conditions (pH 7, 1 % biomass, 0.1 mL/min flow rate, 1.0 mL loading volume) were determined using IMAC. The CA-modified membrane effectively converted CO₂ and mineralized CaCO₃, demonstrating the potential for environmental CO₂ sequestration. The immobilized CA activities of the AEA-COOH-CA nanofiber membranes exhibited 473.42 WAU/g-membrane, corresponding to 7.10 WAU per membrane piece. The CaCO₃ precipitation reached 83.90 mg, with a precipitation efficiency of 11.82 mg CaCO₃/WAU. These findings underscore the promise of enzymatic carbon capture using CA-modified membranes, offering a sustainable solution for greenhouse gas mitigation.

背景人类活动导致大气中的二氧化碳含量增加，引起了人们对气候变化的担忧。碳酸酐酶（CA）有望通过矿化作用将二氧化碳转化为有价值的产品，如碳酸钙（CaCO3）。方法使用固定金属亲和层析法（IMAC）纯化重组 CA，优化 pH 值、生物质浓度、流速和装载量，以获得最高效率。重要发现使用 IMAC 确定了最佳纯化条件（pH 值为 7、生物质浓度为 1%、流速为 0.1 mL/min、装载量为 1.0 mL）。CA 改性膜有效地转化了 CO2 并使 CaCO3 矿化，证明了在环境中封存 CO2 的潜力。AEA-COOH-CA 纳米纤维膜的固定化 CA 活性为 473.42 WAU/g-膜，相当于每片膜 7.10 WAU。CaCO3 沉淀达到 83.90 毫克，沉淀效率为 11.82 毫克 CaCO3/WAU。这些发现强调了使用 CA 改性膜进行酶碳捕集的前景，为温室气体减排提供了一种可持续的解决方案。

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引用次数: 0