Chemical Engineering & Technology最新文献_第4页

Bubble Plume Behavior and Turbulence Characteristics of Gas–Liquid Phase in Power-Law Fluids 动力法流体中的气泡羽流行为和气液相湍流特性

IF 1.8 4区工程技术

Chemical Engineering & Technology Pub Date : 2024-12-26 DOI: 10.1002/ceat.202400257

Xin Dong, Yongrui Shan, Can Xue, Yinuo Liu, Ying Feng, Jianwei Zhang

{"title":"Bubble Plume Behavior and Turbulence Characteristics of Gas–Liquid Phase in Power-Law Fluids","authors":"Xin Dong, Yongrui Shan, Can Xue, Yinuo Liu, Ying Feng, Jianwei Zhang","doi":"10.1002/ceat.202400257","DOIUrl":"https://doi.org/10.1002/ceat.202400257","url":null,"abstract":"The turbulent characteristics of bubble plumes in power-law fluids are studied by experiments and numerical simulations. The effects of liquid phase rheological properties and superficial gas velocity on liquid phase velocity, shear stress, turbulent kinetic energy, turbulent scale, and gas holdup of the bubble plume are investigated. The velocity, shear stress, and turbulent kinetic energy of the liquid phase are distributed in a circular pattern during the generation stage, forming stage, and free-surface interaction stage of the bubble plume. The average shear stress and average turbulence kinetic energy that decomposed turbulent scales in CMC aqueous solution are 31–50 times and 1.4–2 times than that in tap water environment. The gas holdup in the flow field decreases with the increase of concentration of liquid phase and increases with the increase of superficial gas velocity. The flow pattern of the bubble plume is significantly affected by the superficial gas velocity and the rheological properties of the liquid phase that affect the transfer of mass and momentum between phases.","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"48 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143119515","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

Development of a Self-Pressurized Polymer Electrolyte Membrane Electrolyzer for Hydrogen Production at High Pressures

IF 1.8 4区工程技术

Chemical Engineering & Technology Pub Date : 2024-12-23 DOI: 10.1002/ceat.202400121

Dr. Longfei Liao, Dr. Mingyu Li, Yongli Yin, Ruixing Du, Xing Tan, Qitong Zhong, Dr. Feng Zeng

{"title":"Development of a Self-Pressurized Polymer Electrolyte Membrane Electrolyzer for Hydrogen Production at High Pressures","authors":"Dr. Longfei Liao, Dr. Mingyu Li, Yongli Yin, Ruixing Du, Xing Tan, Qitong Zhong, Dr. Feng Zeng","doi":"10.1002/ceat.202400121","DOIUrl":"https://doi.org/10.1002/ceat.202400121","url":null,"abstract":"This study involves the development of a self-pressurized water electrolyzer for H2 production, highlighting the effects of electrolyzer configuration, operation temperature, flow rate, and pressure on the electrolyzer's performance. The compression of H2 takes up a large proportion of the cost for H2 production through water electrolysis in a polymer electrolyte membrane (PEM) electrolyzer. However, creating a high-pressure PEM electrolyzer comes with challenges, such as managing diffusion and ohmic losses that impact cell voltage and efficiency. To address these issues, a novel cell configuration was designed. This configuration aims to minimize the gap among various components, including electrodes, gas diffusion layers, and current collectors. The configuration also leads to reduced cost as well as the difficulty of processing and assembling. Additionally, the gas diffusion layers and current collectors were coated with Pt to enhance their conductivity, effectively reducing the ohmic losses within the cell. Further optimization efforts focused on investigating the effects of temperature, pressure, and water flow on concentration voltage to achieve peak performance. As a result, a cell voltage of 1.868 V was achieved at 1 A/cm2 under 10 MPa operating conditions.","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"48 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143118412","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

Displacement Washing of Filter Cakes With a Fine Particle Top Layer

IF 1.8 4区工程技术

Chemical Engineering & Technology Pub Date : 2024-12-20 DOI: 10.1002/ceat.202400394

Florian Sauer, Erik Löwer, Hendrik Henn, Urs Peuker, Bernhard Hoffner

引用次数: 0

Influence of Pore Size on Cycloaddition Reaction of CO2 and Epoxide Catalyzed by Supported Imidazolium Ionic Liquids

IF 1.8 4区工程技术

Chemical Engineering & Technology Pub Date : 2024-12-20 DOI: 10.1002/ceat.202400134

Xiaohan Yu, Ruiyu Zhang, Xinyi Sun, Yi Liu

{"title":"Influence of Pore Size on Cycloaddition Reaction of CO2 and Epoxide Catalyzed by Supported Imidazolium Ionic Liquids","authors":"Xiaohan Yu, Ruiyu Zhang, Xinyi Sun, Yi Liu","doi":"10.1002/ceat.202400134","DOIUrl":"https://doi.org/10.1002/ceat.202400134","url":null,"abstract":"Conversion of carbon dioxide (CO2) to other chemicals has attracted much attention due to the wide applications of products and its importance. Robust catalysts are critical for efficient conversion due to the inertness of CO2. Immobilized ionic liquid (IL) is one of the most important catalysts with numerous advantages. Various immobilized ILs have been developed with different ILs and supporters. However, rare studies have been carried out to compare the influence of different supporters on the catalytic performance with the fixed IL, especially for the supporter with or without pores. Imidazolium-based IL, imidazolium hydrogen bromide (IMHBr), is immobilized on three different supporters, polystyrene (PS), Santa Barbara Amorphous-15 (SBA-15), and Materials of Institute Lavoisier-101 Chromium (MIL-101(Cr)), to form three immobilized ILs with the central aim to uncover the influence of supporter on the catalytic performance. The MIL-101-IMHBr exhibits better catalytic activity than PS-IMHBr although the immobilized amount of IMHBr on the former is less. The porous structure plays a critical role in enhancing the catalytic activity. In the future, we still need to commit ourselves to the development of catalysts with superior performance.","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"48 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117302","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

Enzymatic Hydrolysis of Residual Soybean Oil with Simultaneous Separation Using Membrane 利用膜同时分离残留大豆油的酶水解作用

IF 1.8 4区工程技术

Chemical Engineering & Technology Pub Date : 2024-12-17 DOI: 10.1002/ceat.202400097

Bruna Jeanne Soares Pacheco, Rafael Bruno Vieira, Vicelma Luiz Cardoso

引用次数: 0

Modeling Approach to Mechanical Gas Dewatering of Filter Cakes With Non-Uniform Cake Height 滤饼高度不均匀的滤饼机械气体脱水建模方法

IF 1.8 4区工程技术

Chemical Engineering & Technology Pub Date : 2024-12-14 DOI: 10.1002/ceat.202400353

Florian Sauer, Hendrik Henn, Bernhard Hoffner

引用次数: 0

Building a Digital Twin for a Ground Heat Exchanger

IF 1.8 4区工程技术

Chemical Engineering & Technology Pub Date : 2024-12-06 DOI: 10.1002/ceat.202300492

Montaser Mahmoud, Concetta Semeraro, Mohamad Ramadan, Mohammad Ali Abdelkareem, Abdul Ghani Olabi

{"title":"Building a Digital Twin for a Ground Heat Exchanger","authors":"Montaser Mahmoud, Concetta Semeraro, Mohamad Ramadan, Mohammad Ali Abdelkareem, Abdul Ghani Olabi","doi":"10.1002/ceat.202300492","DOIUrl":"https://doi.org/10.1002/ceat.202300492","url":null,"abstract":"This research investigates the development of a digital twin (DT) for ground heat exchangers (GHEs) and its potential to enhance the efficiency and sustainability of shallow geothermal energy systems. It introduces an innovative approach for building a GHE-DT that connects the physical and digital systems to monitor key parameters, predict issues, and optimize energy efficiency. The process involves several phases including implicit knowledge codification, data-driven analysis, model construction, and system design. The study emphasizes real-time monitoring of the effective parameters: ground temperature and fluid conditions (flow rate, temperature, and pressure). The GHE-DT's digital system mainly comprises three sections, namely, data storage, mathematical modeling, and data-driven modeling. The role of the presented mathematical model is to simulate the GHE's behavior and assess its performance characteristics, such as the heat exchanger's effectiveness and efficiency. Additionally, the data-driven model used in the proposed DT utilizes formal concept analysis and relation concept analysis to identify connections and associations among parameters for a better understanding of the GHE functioning. The GHE-DT provides useful services including trend analysis, problem prediction, and correlation analysis. These services provide engineers and operators with the opportunity to increase dependability, save maintenance costs, and optimize GHE performance.","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"48 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143112245","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

Reactive Molecular Simulations of Catalytic Methane Decomposition on Ni (1 1 0) Surface

IF 1.8 4区工程技术

Chemical Engineering & Technology Pub Date : 2024-12-04 DOI: 10.1002/ceat.202300445

Rizal Arifin, Yoyok Winardi, Zulkarnain, Abdurrouf, Darminto, Norhasnidawani Johari, Ali Selamat

引用次数: 0

Determination of Solubility and Metastable Zone of Sodium Hypophosphite and Nucleation Kinetics

IF 1.8 4区工程技术

Chemical Engineering & Technology Pub Date : 2024-12-02 DOI: 10.1002/ceat.202400186

Jianbo Liu, Tianjian Zhang, Hang Su, Xin Xu

{"title":"Determination of Solubility and Metastable Zone of Sodium Hypophosphite and Nucleation Kinetics","authors":"Jianbo Liu, Tianjian Zhang, Hang Su, Xin Xu","doi":"10.1002/ceat.202400186","DOIUrl":"https://doi.org/10.1002/ceat.202400186","url":null,"abstract":"To obtain thermodynamic and kinetic data of sodium hypophosphite, such as solubility and metastable zone, respectively, the solubility data for sodium hypophosphite in the temperature range of 298.15–373.15 K were obtained using a dynamic method. These data were then fitted to the Apelblat and Van't Hoff equations, and the corresponding model parameters were determined. The effects of stirring intensity and cooling rate on the width of the metastable zone of sodium hypophosphite in water were studied. The findings indicated that an increase in stirring intensity reduced the width of the metastable zone, whereas an increase in cooling rate resulted in its widening. The self-consistent NýVlt and Sangwal metastable zone models were employed to calculate nucleation dynamic parameters in conjunction with classical nucleation theory. The results showed that the nucleation order was 2.311–3.361 over the investigated temperature range. 316.15 K is the critical temperature point at which sodium hypophosphite transforms into a dominant nucleation mode. The solid–liquid interface tension decreased rapidly with the increase of saturation temperature, and the solid–liquid interface tension is 1.167–2.638 mJ m−2.","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"48 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110916","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

High-Pressure Reactor Technology for Aerated Biotransformations

IF 1.8 4区工程技术

Chemical Engineering & Technology Pub Date : 2024-11-27 DOI: 10.1002/ceat.202400043

Daniel Niehaus, Anastasios Lyberis, Selma Iraqi Houssaini, Zeynep Perçin, Gregor Liebsch, Paul Bubenheim, Marko Hoffmann, Andreas Liese, Michael Schlüter

引用次数: 0