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CFD Simulation Study on Thermal Runaway Behavior of Continuous Flow Reactors 连续流反应器热失控行为的CFD模拟研究
IF 1.6 4区 工程技术
Chemical Engineering & Technology Pub Date : 2025-10-09 DOI: 10.1002/ceat.70086
Qiangqiang Jiang, Lin Hao, Dr. Zhenxing Zhu, Dr. Genghong Li, Prof. Hongyuan Wei
{"title":"CFD Simulation Study on Thermal Runaway Behavior of Continuous Flow Reactors","authors":"Qiangqiang Jiang,&nbsp;Lin Hao,&nbsp;Dr. Zhenxing Zhu,&nbsp;Dr. Genghong Li,&nbsp;Prof. Hongyuan Wei","doi":"10.1002/ceat.70086","DOIUrl":"https://doi.org/10.1002/ceat.70086","url":null,"abstract":"<p>Thermal runaway not only happened in batch reactors but also was a big challenge for continuous flow reactor design. Continuous flow reactors are mainly used for high exothermic reactions due to their advantages of small volume and easy control of reaction conditions. In response to the current lack of thermal safety assessment for continuous flow reactors, this study used a coupled method of computational fluid dynamics (CFD) and HJ criterion to investigate the effects of different operating conditions on the thermal runaway. The results indicate that the diameter, jacket temperature, and the initial concentration of the reactants are critical parameters that contribute to the onset of thermal runaway. And this study presents a new method to help identify thermal runaway in continuous flow reactors, which can provide guidance for the safe design and optimization of the reactor.</p>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"48 10","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145248409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Issue Information: Chem. Eng. Technol. 10/2025 发行信息：化学。Eng。抛光工艺。10/2025
IF 1.6 4区 工程技术
Chemical Engineering & Technology Pub Date : 2025-10-09 DOI: 10.1002/ceat.70124
{"title":"Issue Information: Chem. Eng. Technol. 10/2025","authors":"","doi":"10.1002/ceat.70124","DOIUrl":"https://doi.org/10.1002/ceat.70124","url":null,"abstract":"","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"48 10","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ceat.70124","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145248410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cover Image: Chem. Eng. Technol. 10/2025 封面图片：化学。Eng。抛光工艺。10/2025
IF 1.6 4区 工程技术
Chemical Engineering & Technology Pub Date : 2025-10-09 DOI: 10.1002/ceat.70125
{"title":"Cover Image: Chem. Eng. Technol. 10/2025","authors":"","doi":"10.1002/ceat.70125","DOIUrl":"https://doi.org/10.1002/ceat.70125","url":null,"abstract":"<p>Enameled steel chemical reactor equipment. © gen_A@AdobeStock\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"48 10","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ceat.70125","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145248411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical Study of an Unsteady Electro-Osmotic Flow of Reactive Third-Grade Fluid through a Microchannel Having Asymmetric Convective Cooling 反应性三级流体非对称对流冷却微通道非定常电渗透流动的数值研究
IF 1.6 4区 工程技术
Chemical Engineering & Technology Pub Date : 2025-09-25 DOI: 10.1002/ceat.70110
Idrees Khan, Zhi Ling, Tiri Chinyoka, Muhammad Sohaib
{"title":"Numerical Study of an Unsteady Electro-Osmotic Flow of Reactive Third-Grade Fluid through a Microchannel Having Asymmetric Convective Cooling","authors":"Idrees Khan,&nbsp;Zhi Ling,&nbsp;Tiri Chinyoka,&nbsp;Muhammad Sohaib","doi":"10.1002/ceat.70110","DOIUrl":"https://doi.org/10.1002/ceat.70110","url":null,"abstract":"<p>The study analyzes the fluid-dynamical and thermodynamical behavior of a viscous and incompressible third-grade fluid flowing upwards through a vertical microchannel. The flow is driven by a combination of three forces, namely an adverse pressure gradient, buoyancy forces, and electroosmosis. The fluid is subjected to exothermic reactions modeled under Arrhenius kinetics, and the fluid viscosity is assumed temperature dependent as modeled via a Nahme law. The vertical walls of the microchannel are subjected to convective cooling, modeled via Newton's law of cooling. The resultant system of nonlinear coupled partial differential equations is solved numerically using robust semi-implicit finite difference methods. The results primarily demonstrate, as expected, that both the flow velocity and fluid temperature increase with time, from the zero initial states, until steady states are reached—provided the exothermic reactions are kept low enough to avoid thermal runaway and hence allow for the attainment of steady states. Additionally, and as expected, both the flow velocity and fluid temperature are enhanced in response to increases in the buoyancy driving forces. The more pertinent results show that increased non-Newtonian character of the fluid as well as increased electroosmotic characteristic are both flow retarding. Furthermore, we observe that the presence of non-Newtonian character in the fluid also leads to better mitigation of the thermal runaway phenomena than corresponding Newtonian fluids.</p>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"48 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145146346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Volatilization of Organic Solvents in Spray Coating and Catalytic Treatment of Exhaust Gas from Oven 喷涂过程中有机溶剂的挥发及烘箱废气的催化处理
IF 1.6 4区 工程技术
Chemical Engineering & Technology Pub Date : 2025-09-23 DOI: 10.1002/ceat.70101
Kenichiro Inoue
{"title":"Volatilization of Organic Solvents in Spray Coating and Catalytic Treatment of Exhaust Gas from Oven","authors":"Kenichiro Inoue","doi":"10.1002/ceat.70101","DOIUrl":"https://doi.org/10.1002/ceat.70101","url":null,"abstract":"<p>The percentage of solvents that volatilized during each phase, from spraying to drying, was estimated. The percentage clearly differed depending on the vapor pressure of solvents in coating material. When the coated material was dried without flash-off time after spraying, the concentration of organic components in a drying oven was considerably higher. A Pt/Co<sub>3</sub>O<sub>4</sub>–CeO<sub>2</sub> catalyst was highly effective for exhaust gas from the drying oven containing high concentrations of the aromatic hydrocarbons and fatty acid esters, achieving a conversion of around 90 %.</p>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"48 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145129240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Hydrodynamic Simulation Characteristics of Droplet Flow of H2SO4/C4 System in a Mini-Channel 微型通道中H2SO4/C4体系液滴流动的流体动力学模拟特性
IF 1.6 4区 工程技术
Chemical Engineering & Technology Pub Date : 2025-09-23 DOI: 10.1002/ceat.70106
Yousong Zheng, Chao Chen, Li Lv, Tao Zhang
{"title":"The Hydrodynamic Simulation Characteristics of Droplet Flow of H2SO4/C4 System in a Mini-Channel","authors":"Yousong Zheng,&nbsp;Chao Chen,&nbsp;Li Lv,&nbsp;Tao Zhang","doi":"10.1002/ceat.70106","DOIUrl":"https://doi.org/10.1002/ceat.70106","url":null,"abstract":"<p>Mini-reactors have the advantages of good transportability, easy operability, low cost, and facile scalability. In the liquid–liquid two-phase system with a large density difference, gravitational force plays a significant role in shaping fluid hydrodynamics in mini-channels. The flow characteristics of the sulfuric acid/C<sub>4</sub> hydrocarbon (H<sub>2</sub>SO<sub>4</sub>/C<sub>4</sub>) system in a mini-channel were studied via computational fluid dynamics model under different flow directions to illustrate the gravity effect. The results show that vertical downward direction is more beneficial for forming C<sub>4</sub> droplets. The C<sub>4</sub> droplets display M-shaped axial velocity, vortex-driven interface renewal, and a wriggling motion with periodic shape change. The interface deformation and disturbance during the movement can intensify mass transfer of acid–hydrocarbon two-phase system significantly. These findings deepen the fundamental understanding of gravity effect on multiphase flows in mini-scale devices.</p>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"48 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145129242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Cover Image: Chem. Eng. Technol. 9/2025 封面图片：化学。Eng。抛光工艺。9/2025
IF 1.6 4区 工程技术
Chemical Engineering & Technology Pub Date : 2025-09-23 DOI: 10.1002/ceat.70117
{"title":"Cover Image: Chem. Eng. Technol. 9/2025","authors":"","doi":"10.1002/ceat.70117","DOIUrl":"https://doi.org/10.1002/ceat.70117","url":null,"abstract":"<p>Enameled steel chemical reactor equipment. © gen_A@AdobeStock\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"48 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ceat.70117","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145129246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Alkali Metal on NH3-SCR Performance of Fe–Mn/TiO2 Catalyst and Its Mechanism 碱金属对Fe-Mn /TiO2催化剂NH3-SCR性能的影响及其机理
IF 1.6 4区 工程技术
Chemical Engineering & Technology Pub Date : 2025-09-23 DOI: 10.1002/ceat.70107
Dr. Lixing Zhang, Prof. Lisi Liang, Dr. Hongyue Ma, Dr. Jin Chen, Dr. Yi Li, Dr. Zhongyi Cui
{"title":"Effect of Alkali Metal on NH3-SCR Performance of Fe–Mn/TiO2 Catalyst and Its Mechanism","authors":"Dr. Lixing Zhang,&nbsp;Prof. Lisi Liang,&nbsp;Dr. Hongyue Ma,&nbsp;Dr. Jin Chen,&nbsp;Dr. Yi Li,&nbsp;Dr. Zhongyi Cui","doi":"10.1002/ceat.70107","DOIUrl":"https://doi.org/10.1002/ceat.70107","url":null,"abstract":"<p>The aim of this article is to investigate the effect of alkali metals on the NH<sub>3</sub>-SCR performance of Fe–Mn/TiO<sub>2</sub> catalysts and the poisoning mechanism at 30–170 °C. The catalysts without poisoning, with different kinds of alkali metal poisoning, and with different potassium content poisoning were prepared by impregnation method. The activity tests showed that Na, Ca, and K poisoning could lead to different degrees of catalyst deactivation. Characterization analyses showed that alkali metal poisoning decreases the catalyst specific surface area and pore size, reduces the content of surface–active components Mn<i><sup>n</sup></i><sup>+</sup>, Fe<i><sup>n</sup></i><sup>+</sup>, and (Oα), and reduces the reduction capacity of Mn<i><sup>n</sup></i><sup>+</sup> and Fe<sup>3+</sup>. Mechanism analysis showed that K would reduce the reactivity of Lewis acid sites on the catalyst surface, thus leading to a decrease in the intensity of denitrification reactions conducted via the L–H and E–R mechanisms.</p>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"48 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145129243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
EMHD Impact on Two-Phase Flow of Micropolar Nanofluid with Dissipative Heat and Chemical Reaction EMHD对微极性纳米流体耗散热两相流动及化学反应的影响
IF 1.6 4区 工程技术
Chemical Engineering & Technology Pub Date : 2025-09-23 DOI: 10.1002/ceat.70104
Dr. Subhajit Panda, Rupa Baithalu, Dr. P. K. Pattnaik, Prof. S. R. Mishra
{"title":"EMHD Impact on Two-Phase Flow of Micropolar Nanofluid with Dissipative Heat and Chemical Reaction","authors":"Dr. Subhajit Panda,&nbsp;Rupa Baithalu,&nbsp;Dr. P. K. Pattnaik,&nbsp;Prof. S. R. Mishra","doi":"10.1002/ceat.70104","DOIUrl":"https://doi.org/10.1002/ceat.70104","url":null,"abstract":"<p>In comparison to the traditional study of micropolar fluid that enhances the transport properties, it also favors augmenting the fluid temperature for the interaction of diversified physical quantities. The proposed model for the flow of micropolar nanofluid is improved for the integration of radiating heat and dissipative heat through a permeable medium along with Joule and Darcy dissipation. The present model is reported in the dimensional form that is transformed into ordinary with corresponding standard form using similarity rules. Further, a numerical method combined with the shooting and Runge–Kutta technique is utilized to get the results of each of the profiles. The parameters contributing the fluid flow profiles are deployed graphically, and the rate coefficients are also visualized.</p>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"48 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145129247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Multi-Effect Evaporation Desalination Powered by Vapor Absorption Refrigeration Using Solar Energy 太阳能蒸汽吸收式制冷多效蒸发脱盐
IF 1.6 4区 工程技术
Chemical Engineering & Technology Pub Date : 2025-09-23 DOI: 10.1002/ceat.70103
Prof. Emad Ali
{"title":"Multi-Effect Evaporation Desalination Powered by Vapor Absorption Refrigeration Using Solar Energy","authors":"Prof. Emad Ali","doi":"10.1002/ceat.70103","DOIUrl":"https://doi.org/10.1002/ceat.70103","url":null,"abstract":"<p>Integration of solar-assisted vapor absorption refrigeration (SVAR) with multi-effect evaporator (MEE) is investigated for supply and optimal energy distribution. A solar collector area of 9000 m<sup>2</sup> was necessary to make the SVAR provide MEE with sensible heat to operate at prescribed operating conditions. For better management of the available energies, three MEE variants were proposed. All variants can achieve perfect energy utilization with zero residue only if the MEE feed rate is prudently adjusted. The highest attainable recovery ratio and performance ratio are 38 % and 2.0, respectively. Two MEE variants suffer from chilling energy shortage when the last effect temperature (<i>T</i><sub>bn</sub>) is less than 41 °C, whereas another variant undergoes the same issue when <i>T</i><sub>bn</sub> exceeds 41 °C. SVAR can provide sufficient feed preheating and condenser cooling over a range of temperature drop per effect between 1 and 5 and a range of feed rate of 10–50 kg s<sup>−1</sup> except at sporadic extreme conditions.</p>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"48 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145129250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
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