Journal of the Taiwan Institute of Chemical Engineers最新文献_第5页

Mechanistic insights into the impact of sinter ore basicity on softening and melting behavior 烧结矿碱度对软化和熔化行为影响的机理研究

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-24 DOI: 10.1016/j.jtice.2025.106536

Wen-chien Tsai , Yu-ning Chiu , Kai-chun Chang , Jia-shyan Shiau , Ke-miao Lu , Tsung-yen Huang , Shan-wen Du , Ker-chang Hsieh , Hao-long Chen , Shih-kang Lin

Background

Traditional empirical indices, such as T₁₀ (softening onset) and T₄₀ (softening completion), are widely used to evaluate how sinter basicity (B₂) influences the softening and melting (S&M) behavior in blast furnace ironmaking. Although simple and intuitive, these indices show weak correlation with the underlying physicochemical mechanisms and microstructural evolution.

Methods

This study employs a systematic analytical framework integrating a dynamically controlled atmosphere, microstructural characterization, exhaust gas analysis, and thermodynamic modeling. By comparing sinter ore with different B₂, we evaluate the limitations of empirical indices and provide a mechanistic understanding of B₂ effects on S&M behavior.

Significant Finding

Comparing typical (B₂ = 1.93) and high-basicity sinter (B₂ = 2.36), we find that increased B₂ lowers the initial FeO liquefaction temperature, promoting earlier, more abundant liquid formation. This accelerates the direct reduction (FeO + C → Fe + CO) and results in greater shrinkage within the 1100−1250 °C range. Extensive early liquid formation fills pore spaces, intensifying softening at lower temperatures. Additionally, high-B₂ sinter lowers the slag dripping temperature (1399 °C vs. 1456 °C), facilitating early FeO liquid drainage and suppressing FeO coarsening in 1330–1430 °C range. These findings indicate that increasing sinter basicity enhances S&M behavior, improves gas permeability, and optimizes reduction reactions in blast furnace operations.

传统的经验指标，如T10（软化开始）和T40（软化完成），被广泛用于评价烧结矿碱度（B2）如何影响高炉炼铁过程中的软化和熔化（S&；M）行为。这些指标虽然简单直观，但与潜在的物理化学机制和微观结构演化的相关性较弱。方法本研究采用了一个系统的分析框架，包括动态控制气氛、微观结构表征、废气分析和热力学建模。通过比较不同B2的烧结矿，我们评估了经验指标的局限性，并提供了B2对S&；M行为影响的机理理解。对比典型烧结矿（B2 = 1.93）和高碱度烧结矿（B2 = 2.36），我们发现B2的增加降低了FeO的初始液化温度，促进了更早、更丰富的液态形成。这加速了直接还原（FeO + C→Fe + CO），并在1100 ~ 1250℃范围内产生更大的收缩率。大量的早期液体地层填满孔隙空间，在较低温度下加剧软化。此外，高b2烧结矿降低了渣滴温度（1399℃vs 1456℃），有利于FeO液体的早期析出，抑制了1330 ~ 1430℃范围内FeO的粗化。这些发现表明，增加烧结矿碱度可以增强S&；M行为，改善气体渗透性，并优化高炉操作中的还原反应。

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引用次数: 0

Corrigendum to “Effective retention of inorganic Selenium ions (Se (VI) and Se (IV)) using novel sodalite structures from muscovite; characterization and mechanism” [Journal of the Taiwan Institute of Chemical Engineers 120 (2021)] “使用来自白云母的新型钠云石结构有效保留无机硒离子（Se （VI）和Se (IV)）”的勘误；[台湾化学工程学会学报120 (2021)]

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-23 DOI: 10.1016/j.jtice.2025.106530

Soha M. Albukhari , Mohamed Abdel Salam , Mostafa R. Abukhadra

引用次数: 0

Precise tuning of PVDF-HFP membrane structures via near-field electrospinning: Dual applications in oil-water separation and membrane emulsification 近场静电纺丝技术对PVDF-HFP膜结构的精确调谐：在油水分离和膜乳化中的双重应用

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-23 DOI: 10.1016/j.jtice.2025.106535

Ronggui Wang , JunTong Meng , Xinya Wang , Tiantian Li , Ruirui Cao , Wei Zhang , Mingxing Chen

Background

Precise regulation of membrane pore structure for the treatment of oily wastewater has become an urgent problem. This study introduces an effective and facile method to fabricate membranes with controllable structure and highlights their potential as innovative choices for oil-water separation and premixed membrane emulsification.

Methods

This study prepared Polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) membranes with controllable pore structure via near-field electrospinning (NFES) technology and the effects of the number of layers, inscribed circular diameter and pore geometry on structure and properties were investigated, respectively.

Significant Findings

The results showed that when the number of layers was 6, the inscribed circular diameter of square pores was 0.2 mm, the obtained membranes exhibited excellent oil-water separation performance with a high separation efficiency of 96.77 % and a separation flux of 1511 L∙m^-2∙h^-1. Compared with the obtained membranes with other pore geometries, the obtained membrane with square pores exhibited excellent oil-water separation and premixed membrane emulsification performance. Additionally, oil-water separation performance had no discernible decay after 500 cycle tests, underscoring their exceptional stability. During the premixed membrane emulsification process, water-in-oil emulsions prepared by the obtained membranes presented a relatively narrow particle size distribution and exhibited excellent stability.

背景含油废水处理中膜孔结构的精确调控已成为一个亟待解决的问题。本研究介绍了一种有效且简单的制备可控结构膜的方法，并强调了其作为油水分离和预混合膜乳化的创新选择的潜力。方法采用近场静电纺丝（NFES）技术制备了孔结构可控的聚偏氟乙烯-共六氟丙烯（PVDF-HFP）膜，考察了膜层数、内切圆直径和孔几何形状对膜结构和性能的影响。结果表明：当膜层数为6层，方形孔内切圆直径为0.2 mm时，所制得的膜具有优异的油水分离性能，分离效率高达96.77%，分离通量为1511 L∙m-2∙h-1。与其他孔结构的膜相比，方形孔结构的膜具有良好的油水分离和预混膜乳化性能。此外，经过500次循环测试，油水分离性能没有明显的衰减，强调了它们卓越的稳定性。在预混合膜乳化过程中，所得膜制备的油包水乳液粒径分布较窄，稳定性较好。

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引用次数: 0

Selenium and cobalt co-doped carbon catalyst to activate peroxymonosulfate for efficient tetracycline hydrochloride degradation: Primary role of non-radicals 硒和钴共掺杂碳催化剂激活过氧单硫酸盐高效降解盐酸四环素：非自由基的主要作用

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-22 DOI: 10.1016/j.jtice.2025.106532

Dianrui Yang , Yidan Liu , Ruiying Zhu , Hong Ma , Lejing Zhou , Jinping Liang , Xiaobo Gong

Background

Peroxymonosulfate (PMS)-based advanced oxidation process has been proved to be an effective method for antibiotic treatment, however, the activation of PMS should be improved for practical applications.

Methods

A selenium-cobalt co-doped carbon composite material (CoSe@C) was successfully synthesized through pyrolyzing of ZIF-67 with selenium powder. The CoSe@C was used to degrade tetracycline hydrochloride (TC).

Significant findings

Under optimized conditions of 0.05 g/L CoSe@C, 0.1 g/L PMS and pH = 4.8 at 25 °C, 89.1% TC removal was achieved within 60 min. Characterization confirmed that cobalt provides abundant active sites, while selenium doping enhances graphitization and electron transfer capacity. The non-radical pathway played the primary role, with high valent cobalt and electron transfer contributing the mainly TC degradation in CoSe@C/PMS system. Two possible degradation pathways were proposed in CoSe@C/PMS system, and the most intermediates have lower toxicity than initial TC. The catalyst also exhibited good reusability. This work demonstrates the potential of MOF-derived Se-doped catalysts in advanced oxidation processes for antibiotic-contaminated wastewater treatment.

基于过氧单硫酸根（PMS）的高级氧化工艺已被证明是一种有效的抗生素治疗方法，但为了实际应用，PMS的活化还有待改进。方法采用硒粉热解ZIF-67，成功合成硒钴共掺杂碳复合材料（CoSe@C）。用CoSe@C降解盐酸四环素（TC）。在0.05 g/L CoSe@C, 0.1 g/L PMS, pH = 4.8, 25℃条件下，60 min内可达到89.1%的TC去除率。表征证实钴提供了丰富的活性位点，而硒的掺杂增强了石墨化和电子转移能力。在CoSe@C/PMS体系中，非自由基途径起主要作用，高价钴和电子转移是降解TC的主要途径。在CoSe@C/PMS体系中提出了两种可能的降解途径，大多数中间体的毒性低于初始TC。催化剂具有良好的可重复使用性。这项工作证明了mof衍生的硒掺杂催化剂在抗生素污染废水处理的高级氧化过程中的潜力。

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引用次数: 0

Molecular engineering of Co ion–imprinted sites on metal–organic frameworks and facile photodeposition for the selective recovery and upcycling of Co(II) 金属-有机骨架上Co离子印迹位点的分子工程及快速光沉积对Co（II）的选择性回收和升级利用

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-20 DOI: 10.1016/j.jtice.2025.106527

Xin Liu , Ruixue Hu , Shiran Zhu , Xiangyu Liu , Yu Fang , Yihang Li , Wei Wei

Background

The demand for adsorption technologies that facilitate the recovery and upcycling of the valuable metallic element, Co, has been increasing. The recovery of Co from wastewater using metal–organic frameworks (MOFs), which are promising adsorbents, is considerably limited because of the lack of selective adsorption sites. Furthermore, research on the upcycling of Co remains inadequate.

Methods

Herein, we develop an integrated strategy combining ion imprinting modification and photodeposition for the selective recovery and upcycling of divalent Co ions (Co(II)) using MOF adsorbents.

Significant findings

First, Co ion–imprinted sites are constructed on a typical MOF adsorbent, MIL-125 (labeled CoIP-ML), via molecular engineering using glycylglycine. Compared with the original aminated MIL-125, CoIP-ML exhibits a superior performance, achieving the maximum adsorption capacity (q_m = 218.6 mg/g) and selectivity (selective coefficient k_{Co(II)/Ni(II)} = 3.61) for Co(II) via the chelation of Schiff base groups and adsorption at terminal carboxyl groups. The Co(II) adsorbed on CoIP-ML is upcycled through a facile photodeposition process into Co oxides, which function as a Fenton-like catalyst. The optimal catalyst effectively activates peroxymonosulfate for the removal of chloroquine diphosphate and chlortetracycline hydrochloride, achieving the upcycling of Co(II). This study presents a unique MOF-functionalization paradigm.

对吸附技术的需求越来越大，吸附技术可以促进有价金属元素Co的回收和升级利用。金属有机框架（MOFs）是一种很有前途的吸附剂，但由于缺乏选择性吸附位点，其从废水中回收Co的能力受到很大限制。此外，对Co的升级回收研究还不足。方法采用离子印迹改性和光沉积相结合的方法，利用MOF吸附剂对二价Co离子（Co(II)）进行选择性回收和升级利用。首先，通过甘氨酸分子工程，在典型的MOF吸附剂MIL-125（标记为CoIP-ML）上构建了Co离子印迹位点。与原胺化MIL-125相比，CoIP-ML表现出更优异的吸附性能，通过席夫碱基的螯合和末端羧基的吸附，对Co（II）达到了最大的吸附量（qm = 218.6 mg/g）和选择性系数(kCo（II)/Ni(II) = 3.61）。吸附在CoIP-ML上的Co（II）通过简单的光沉积过程升级为Co氧化物，Co氧化物作为Fenton-like催化剂。优化后的催化剂能有效活化过氧单硫酸根脱除二磷酸氯喹和盐酸氯四环素，实现Co（II）的升级回收。本研究提出了一种独特的mof功能化范式。

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引用次数: 0

Covalent bridging strategy with multiscale silicon architectures for polyurethane composites: Enhanced interfacial compatibility and long-term durability 聚氨酯复合材料多尺度硅结构共价桥接策略：增强界面相容性和长期耐久性

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-19 DOI: 10.1016/j.jtice.2025.106531

Qian Chen , Lili Guo , Shihui Chen , Xiaoyun Li , Junwei Wang

Background

Polyurethane (PU) composites face critical limitations in industrial applications due to weak interfacial adhesion and polarity mismatch between conventional fillers and polymer matrices. This study proposes a multiscale interface engineering approach to mitigate these limitations.

Methods

The silica (SiO₂) particle-modified graphene oxide (SKG) via silane coupling agent was prepared, and the corresponding composites were fabricated by incorporating various SKG ratios (0-5 wt‰) into PU through melt blending. The SAXS analysis was conducted to characterize the microphase separation, and mechanical tests were utilized, especially aging measurements were carried out to explore the durability performance.

Significant findings

The incorporation of SKG at extremely low loading level led to a remarkable improvement in mechanical properties, with tensile strength increasing by 37.1% from 25.3 MPa to 34.7 MPa, alongside a high tear resistance of 78.4 kN/m. More importantly, aging tests demonstrated outstanding durability, retaining over 80% of the original tensile strength even under simulated 48-month service conditions. This strategy establishes a versatile and scalable pathway for developing high-performance elastomers that combine strength with long-term durability in concise way, showing promise for shock-absorbing applications.

聚氨酯（PU）复合材料在工业应用中面临着严重的限制，因为传统填料和聚合物基体之间的界面附着力弱和极性不匹配。本研究提出了一种多尺度界面工程方法来减轻这些限制。方法通过硅烷偶联剂制备二氧化硅（SiO2）颗粒改性氧化石墨烯（SKG），并通过熔融共混将不同配比（0 ~ 5 wt‰）的SKG掺入PU中制备相应的复合材料。利用SAXS分析表征了微相分离，并利用力学试验，特别是老化试验来探索其耐久性性能。在极低的加载水平下，SKG的加入使材料的力学性能得到了显著改善，抗拉强度从25.3 MPa提高到34.7 MPa，提高了37.1%，抗撕裂性达到78.4 kN/m。更重要的是，老化试验显示出出色的耐久性，即使在模拟48个月的使用条件下，也能保持80%以上的原始抗拉强度。该策略为开发高性能弹性体建立了一种通用且可扩展的途径，该弹性体以简洁的方式将强度与长期耐用性结合起来，显示了减震应用的前景。

{"title":"Covalent bridging strategy with multiscale silicon architectures for polyurethane composites: Enhanced interfacial compatibility and long-term durability","authors":"Qian Chen , Lili Guo , Shihui Chen , Xiaoyun Li , Junwei Wang","doi":"10.1016/j.jtice.2025.106531","DOIUrl":"10.1016/j.jtice.2025.106531","url":null,"abstract":"<div><h3>Background</h3><div>Polyurethane (PU) composites face critical limitations in industrial applications due to weak interfacial adhesion and polarity mismatch between conventional fillers and polymer matrices. This study proposes a multiscale interface engineering approach to mitigate these limitations.</div></div><div><h3>Methods</h3><div>The silica (SiO<sub>2</sub>) particle-modified graphene oxide (SKG) via silane coupling agent was prepared, and the corresponding composites were fabricated by incorporating various SKG ratios (0-5 wt‰) into PU through melt blending. The SAXS analysis was conducted to characterize the microphase separation, and mechanical tests were utilized, especially aging measurements were carried out to explore the durability performance.</div></div><div><h3>Significant findings</h3><div>The incorporation of SKG at extremely low loading level led to a remarkable improvement in mechanical properties, with tensile strength increasing by 37.1% from 25.3 MPa to 34.7 MPa, alongside a high tear resistance of 78.4 kN/m. More importantly, aging tests demonstrated outstanding durability, retaining over 80% of the original tensile strength even under simulated 48-month service conditions. This strategy establishes a versatile and scalable pathway for developing high-performance elastomers that combine strength with long-term durability in concise way, showing promise for shock-absorbing applications.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"181 ","pages":"Article 106531"},"PeriodicalIF":6.3,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145569461","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

A spindle-shaped phosphotungstic acid loaded amidoximated natural bamboo strip for extracting uranium 载磷钨酸的纺锤形偕胺肟化天然竹条提铀

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-19 DOI: 10.1016/j.jtice.2025.106520

Yan Feng, Yuxi Li, Shengxuan Gao, Yue Tao, Ying Zhang

Background

Inorganic materials with high O/N content for Uranium Extraction from Seawater (UES) show fast-adsorption rate, but practical applications are limited by their easy dispersion, difficult recovery, and poor selectivity. Therefore, inspired by the macroscopic large-area molding, antibacterial properties, and hierarchical porous microstructure of bamboo strips (BS), a nanoscale spindle-shaped phosphotungstic acid (PTA) loaded amidoximated BS (AOBS) as the inorganic/organic composite material with high O/N content is designed and applied to extracting uranium.

Methods

Under the effects of the hydrogen bonding crosslinking, the protonation process of -NH₂, the physical limitations of PEG molecular chains, and others, a nanoscale spindle-shaped PTA loaded fibrous AOBS (PW₁₂AOBS) is successfully synthesized by chemical cross-linking and hydrothermal methods.

Significant Findings

PW₁₂AOBS has the super-hydrophilic surface and ultra-fast infiltration rate, so that it exhibits an excellent antibacterial performance and a super-fast adsorption rate. When the contact time is 5 mins, the adsorption capacity is 195.6 mg·g⁻¹, and a removal rate of uranium is 78.2 %. The highest removal rate of uranium is 82.6 %, and the adsorption capacity reaches 343.6 μg·g⁻¹ in simulated seawater. The terminal OH/-COOH and bridging W=O from PW₁₂AOBS synchronously act as the active sites for extracting uranium.

高O/N含量的有机材料对海水提铀的吸附速度快，但易分散、难回收、选择性差，限制了其实际应用。因此，受竹条（BS）宏观大面积成型、抗菌性能和分层多孔结构的启发，设计了一种纳米级纺锤形磷钨酸（PTA）负载偕胺肟化BS （AOBS）作为高O/N含量的无机/有机复合材料，并将其应用于铀提取。方法在氢键交联、-NH2质子化过程、PEG分子链物理限制等因素的影响下，采用化学交联和水热法成功合成了纳米级纺锤形PTA负载的纤维AOBS （PW12AOBS）。spw12aobs具有超亲水性表面和超快的渗透速率，从而表现出优异的抗菌性能和超快的吸附速率。当接触时间为5 min时，铀的吸附量为195.6 mg·g−1，铀的去除率为78.2%。模拟海水中铀的最高去除率为82.6%，吸附量达343.6 μg·g−1。PW12AOBS的末端OH/-COOH和桥接W=O同时作为提取铀的活性位点。

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引用次数: 0

Harnessing the biomimetic superhydrophobic shell matrix onto Mg alloy: One-step electrodeposition preparation and corrosion inhibition 仿生超疏水壳基在镁合金上的应用：一步电沉积制备及缓蚀

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-19 DOI: 10.1016/j.jtice.2025.106528

Jihao Hou , Haiqiang Liu , Xinyu Song , Yu Zhu , Tengfei Li , Jirun Liu , Ri Qiu , Yibo Ouyang

Background

Mg alloys are widely used in industries such as aerospace, automotive, and electronics. However, their poor corrosion resistance, especially in humid and saline environments, limits broader application.

Method

To address this problem, we used a one-step electrodeposition process to create a nanostructured coating with both high hydrophobicity and enhanced corrosion resistance. The optimal coating, deposited at 30 V for 20 min, exhibited a contact angle exceeding 150°.

Significant finding

The corrosion inhibition performance is attributed to a protective layer obtained via electrodeposition from solution of neodymium nitrate and myristic acid. Additionally, the coating showed high mechanical durability, self-cleaning ability, and stability in various pH environments, further confirming the good performance of the coating. Simulated humid and marine environments also validated its superhydrophobic and anti-corrosion capabilities, proving an effective role for protecting AZ31 magnesium alloy in corrosive conditions.

镁合金广泛应用于航空航天、汽车、电子等行业。然而，它们的耐腐蚀性差，特别是在潮湿和盐水环境中，限制了它们的广泛应用。为了解决这一问题，我们采用一步电沉积工艺制备了具有高疏水性和增强耐腐蚀性的纳米结构涂层。最佳涂层在30 V下沉积20 min，其接触角超过150°。发现硝酸钕与肉豆酱酸溶液电沉积形成了一层保护层，具有良好的缓蚀性能。此外，涂层表现出较高的机械耐久性、自清洁能力和在各种pH环境下的稳定性，进一步证实了涂层的良好性能。模拟的潮湿和海洋环境也验证了其超疏水和防腐能力，证明了AZ31镁合金在腐蚀条件下的有效保护作用。

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引用次数: 0

Bioprocess engineering for high-yield dodecanedioic acid production using Candida viswanathii 利用viswanathii念珠菌高产十二烷二酸的生物工艺工程

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-19 DOI: 10.1016/j.jtice.2025.106525

Nam Ngoc Pham , Ting-An Dai , Chin-Wei Chang , Chih-Jung Chen , Jih Ru Hwu , Yu-Chen Hu

Background

Dodecanedioic acid (DDA) is an important monomer with wide applications in industry, but its chemical synthesis is energy-intensive and contributes to greenhouse gas emissions. To address these sustainability concerns, we previously engineered an alkane-assimilating yeast Candida viswanathii using a split CRISPR system for multi-gene integration, achieving record DDA titers and high conversion efficiency.

Methods

Building on this genetic foundation, in this study we further developed and optimized the bioprocess for high-yield DDA production in a 3-L fermenter, followed by efficient purification.

Significant findings

By identifying low-cost nutrient combinations to replace the expensive Yeast Nitrogen Base (YNB), we reduced the medium cost by 28.8-fold. We further evaluated the process parameters including surfactant supplementation, nutrient feeding and cell density at the onset of DDA production. Such strategic process engineering improved the DDA titer from 90 g/L to 162 g/L and enhanced the total DDA yield from 240 g to 453 g. Importantly, the optimized process achieved a molar conversion efficiency of ≈99%. Furthermore, we developed a simple purification method, yielding 95% DDA recovery and >99% product purity. This study demonstrates the potential of integrated bioprocess engineering to enable sustainable and economically viable microbial production of DDA.

十二烷二酸（DDA）是一种重要的单体，在工业上有着广泛的应用，但其化学合成是高能耗的，并造成温室气体的排放。为了解决这些可持续性问题，我们之前使用分裂CRISPR系统设计了一种烷烃同化酵母viswanathii，用于多基因整合，获得了创纪录的DDA滴度和高转化效率。方法在此基础上，进一步开发和优化了3-L发酵罐高产DDA的生物工艺，并进行了高效纯化。通过确定低成本的营养物组合来替代昂贵的酵母氮基（YNB），我们将培养基成本降低了28.8倍。我们进一步评估了DDA生产开始时的工艺参数，包括表面活性剂的添加，营养饲料和细胞密度。这种战略性的工艺工程使DDA滴度从90 g/L提高到162 g/L， DDA总产率从240 g提高到453 g。重要的是，优化后的工艺实现了≈99%的摩尔转化效率。此外，我们开发了一种简单的纯化方法，DDA回收率为95%，产品纯度为99%。这项研究证明了综合生物工艺工程的潜力，使可持续和经济上可行的微生物生产DDA。

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引用次数: 0

Thermodynamic and computational fluid dynamic analysis of a microchannel heat sink device: Use of nanofluids, effect of pin shape and inclusion vortex generators 微通道散热装置的热力学和计算流体动力学分析：纳米流体的使用、针形和内含涡发生器的影响

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-17 DOI: 10.1016/j.jtice.2025.106529

A. Santos , L. Silva-Llanca , E. Castillo , A. Gonzalez

Background:

Microchannel designs may enhance the cooling of electronic devices by increasing heat flux, reducing thermal resistance, and promoting uniform temperature distribution. This study analyzes entropy generation and exergy destruction in microchannel heat sinks using computational fluid dynamics, comparing various working fluids and geometries.

Methods:

The working fluids considered include pure water, a water–ethylene glycol mixture (80:20), and a Newtonian nanofluid (

{Al}_{2} O_{3}

/water) with 0.0075 volume fraction. Three geometries, including cylindrical and square pins with and without vortex generators, are analyzed in a Reynolds number range of 200 to 800. The steady-state laminar numerical simulations were performed using ANSYS Fluent.

Significant findings

: The inclusion of vortex generators reduces total entropy generation across all cases. The water–ethylene glycol mixture leads to a reduction of up to 9.52% compared to pure water, making it the most efficient working fluid tested. In contrast, the nanofluid increases entropy generation by up to 3.44%. Higher Reynolds numbers consistently lead to lower entropy generation and exergy destruction. The study also identifies consistent relationships between the entropy generation number and key dimensionless groups such as Reynolds, Nusselt, and Stanton numbers, supporting the development of simplified engineering correlations. These findings provide clear guidance on the trade-offs between fluid selection and geometric design for thermally efficient microchannel cooling systems.

背景：微通道设计可以通过增加热流密度、降低热阻和促进温度均匀分布来增强电子器件的冷却。本研究利用计算流体力学分析了微通道散热器的熵产和火用破坏，比较了各种工质和几何形状。方法：考虑的工作流体包括纯水、水-乙二醇混合物（80:20）和牛顿纳米流体（Al2O3/水），体积分数为0.0075。在雷诺数为200到800的范围内，分析了三种几何形状，包括圆柱形和方形针，有和没有涡旋发生器。利用ANSYS Fluent软件进行了稳态层流数值模拟。重要发现：涡旋发生器的加入减少了所有情况下的总熵生成。与纯水相比，水-乙二醇混合物的效率降低了9.52%，使其成为测试中效率最高的工作液。相比之下，纳米流体使熵产生增加了3.44%。较高的雷诺数始终导致较低的熵产和火能破坏。该研究还确定了熵生成数与关键无量纲群（如Reynolds， Nusselt和Stanton数）之间的一致关系，支持简化工程相关性的发展。这些发现为热效率微通道冷却系统的流体选择和几何设计之间的权衡提供了明确的指导。

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引用次数: 0