Asia-Pacific Journal of Chemical Engineering最新文献_第4页

Controllable synthesis of snowflake-like α-calcium sulfate hemihydrate microstructures using Na2EDTA as morphology modifier 使用 Na2EDTA 作为形态改性剂可控合成雪花状 α-硫酸钙半水合物微结构

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-03-25 DOI: 10.1002/apj.3064

Lingling Lv, Yang Gao, Ming Guo, Minfu Liu, Baocun Zhang, Han Lin, Xingong Zhang, Chenguang Liu

{"title":"Controllable synthesis of snowflake-like α-calcium sulfate hemihydrate microstructures using Na2EDTA as morphology modifier","authors":"Lingling Lv, Yang Gao, Ming Guo, Minfu Liu, Baocun Zhang, Han Lin, Xingong Zhang, Chenguang Liu","doi":"10.1002/apj.3064","DOIUrl":"10.1002/apj.3064","url":null,"abstract":"In this work, snowflake-like α-CaSO4·0.5H2O (α-CSH) hierarchical architectures were successfully synthesized by a facile one-pot method in an ethylene glycol-water system using Na2EDTA as a crystal morphology modifier. Characterization techniques including X-ray diffraction (XRD), thermogravimetric (TG) analysis, differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR) confirmed the progressive morphological evolution of α-CSH from rods to snowflake-like structures ultimately to hexagonal plates with increased Na2EDTA concentrations. The results revealed that Na2EDTA concentration played a critical role in directing the crystallization and self-assembly of α-CSH, and a mechanism is proposed where Na2EDTA modulated crystal orientation through preferential adsorption and regulated the driving forces between ion-mediated crystallization and particle-mediated assembly. This work puts forward a simple yet effective strategy for facilely regulating the morphology of α-CSH microstructures, which could potentially expand their applications across diverse fields such as composites, construction, biomedicine, and drug delivery.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140301399","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

Utilization of industrial by-product gypsum to prepare urea gypsum cocrystals as a sustained release fertilizer: A review 利用工业副产品石膏制备尿素石膏茧晶作为缓释肥料：综述

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-03-24 DOI: 10.1002/apj.3066

Jiang Zhao, Caiyun Jia, Xiaoxia Fang, Anni Xiao, Haijun Zhang

引用次数: 0

Dividing-wall column for separating wide boiling mixture: Optimal design and servo control strategy 用于分离宽沸程混合物的分壁柱：优化设计和伺服控制策略

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-03-21 DOI: 10.1002/apj.3065

Md Aurangzeb, Sudip Banerjee, Subhankar Roy, Ravi Tejasvi

{"title":"Dividing-wall column for separating wide boiling mixture: Optimal design and servo control strategy","authors":"Md Aurangzeb, Sudip Banerjee, Subhankar Roy, Ravi Tejasvi","doi":"10.1002/apj.3065","DOIUrl":"10.1002/apj.3065","url":null,"abstract":"The dividing-wall column (DWC) stands as an energy-efficient distillation technology designed to efficiently separate ternary systems into their pure components within a single column. Despite its efficiency, integrating two towers into a DWC poses challenges in controllability. Published studies have focused on developing controllers for disturbance rejection but have not addressed the issue of servo control. Addressing this, our study proposes a servo controller problem and a methodical approach to strategically select controlled variables that undergo consecutive set point step changes, aiming to track the purity of key products obtained from the DWC. To achieve this goal, we developed a dynamic model specifically tailored to the DWC. Determining the design parameters involved employing a genetic algorithm optimization technique, minimizing the total annual cost. Subsequently, we implemented three servo parallel proportional-integral (PI) feedback controllers for three distinct product streams. The fine-tuning of their controller gain and reset time is carried out by minimizing the integrated square error while adhering to valve opening constraints. Our investigation revealed a limitation: the introduction of simultaneous step changes in all three controlled variables proved unfeasible with the three active PI controllers. As an alternative, our findings recommend prioritizing two variables: the lightest (distillate) and heaviest (bottom) key components, alongside the middle component (side stream) and either the lightest or heaviest key component. This research underscores the complexities of implementing step changes in multiple controlled variables within a DWC, offering insights into optimal control strategies for enhancing the efficiency of this innovative distillation technology.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140197500","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

Statistical physics modelling of adsorption isotherms of water vapour on shale: Stereographic, energetic and thermodynamic investigations 水蒸气在页岩上吸附等温线的统计物理建模：立体结构、能量和热力学研究

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-03-21 DOI: 10.1002/apj.3062

Shuo Duan, Shiyu Shen, Guodong Li, Xiangyang Ling, Pengfei Shen

{"title":"Statistical physics modelling of adsorption isotherms of water vapour on shale: Stereographic, energetic and thermodynamic investigations","authors":"Shuo Duan, Shiyu Shen, Guodong Li, Xiangyang Ling, Pengfei Shen","doi":"10.1002/apj.3062","DOIUrl":"10.1002/apj.3062","url":null,"abstract":"Understanding the mechanisms of shale–water interaction by water vapour adsorption is crucial for predicting shale gas productivity. In this study, equilibrium adsorption data of water vapour on four different shales of the Sichuan Basin at three temperatures (298, 308, and 318 K) were measured using static gravity techniques. The water vapour adsorption isotherms were simulated by three statistical physics models. Steric parameters, including the number of water vapour molecules adsorbed per site (n), monolayer adsorption amount (q0), and adsorption energy (ΔEa), and thermodynamic parameters such as configuration entropy (Sa), internal energy (Eint), and free energy (Ga) derived from the selected model were used to explain the adsorption mechanism. The model analyses suggest that the adsorbed water vapour molecules are attached to the shale surface in a multi-anchorage manner. The adsorption of the first layer shows a Type I characteristics, while the adsorption of the subsequent layer is of Type III. The calculated adsorption energies indicate that the physical adsorption takes place on the water vapour molecules on the shale, and the main interaction forces are hydrophilic bonding forces and van der Waals forces. Negative Eint and Ga values indicate that the spontaneous properties are for water vapour adsorption and that the system requires the release of energy to capture the water vapour molecules.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140197499","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

Effects of air inlet and outlet on thermal management of electric vehicle battery pack equipped with fins 进气口和出气口对装有散热片的电动汽车电池组热管理的影响

IF 1.8 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-03-20 DOI: 10.1002/apj.3061

Jie Yu, Yunsen Zhang, Cong Qi, Lin Liang

引用次数: 0

K2CO3 on porous supports for moisture-swing CO2 capture from ambient air 多孔支撑物上的 K2CO3 从环境空气中捕获湿摆式二氧化碳

IF 1.8 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-03-18 DOI: 10.1002/apj.3058

Shiqiang Zheng, Xinyue Cheng, Wenjia Zhou, Tong Wang, Liangliang Zhu, Hang Xiao, Xi Chen

{"title":"K2CO3 on porous supports for moisture-swing CO2 capture from ambient air","authors":"Shiqiang Zheng, Xinyue Cheng, Wenjia Zhou, Tong Wang, Liangliang Zhu, Hang Xiao, Xi Chen","doi":"10.1002/apj.3058","DOIUrl":"10.1002/apj.3058","url":null,"abstract":"Direct air capture (DAC) of CO2 is an important technology to mitigate mobile carbon emissions, reduce atmospheric CO2 concentration, and cope with climate change. Moisture-swing adsorption is regarded as one of the most promising technologies in DAC due to its low energy consumption and ease of operation. In this work, a cheap and easily available moisture-swing adsorbent of potassium carbonate loaded on porous supports (i.e., activated carbon, magnesium oxide, and zeolite) was prepared for CO2 capture from ambient air. The composite adsorbent of potassium carbonate on activated carbon showed the best performance with a DAC capacity of 0.562 mmol/g at 25°C and 5% relative humidity. The effects of temperature, relative humidity, and CO2 concentration on the adsorption performance were investigated systematically, as well as the cyclic DAC performance. In 50 adsorption–desorption cycles, the adsorption capacity of the composite adsorbent decreased by ~40% due to potassium carbonate leaching loss during water evaporation but can be fully recovered simply by re-impregnating with potassium carbonate again.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140154823","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

Kinetics of microwave carbothermal reduction of Sb2O3: Isothermal and non-isothermal microwave thermogravimetric analysis 微波碳热还原 Sb2O3 的动力学：等温和非等温微波热重分析

IF 1.8 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-03-12 DOI: 10.1002/apj.3046

Qinsheng Yang, Chenhui Liu, Xiongjin Zhu, Chandrasekhar Srinivasakannan, Yingwei Li, Ying Dai

{"title":"Kinetics of microwave carbothermal reduction of Sb2O3: Isothermal and non-isothermal microwave thermogravimetric analysis","authors":"Qinsheng Yang, Chenhui Liu, Xiongjin Zhu, Chandrasekhar Srinivasakannan, Yingwei Li, Ying Dai","doi":"10.1002/apj.3046","DOIUrl":"10.1002/apj.3046","url":null,"abstract":"Kinetics of antimony production via carbothermal reduction of Sb2O3–carbon powder–NaCl mixture using microwave and conventional heating was investigated to identify the dominant controlling mechanism. Results of conventional heating revealed the temperature range of conventional carbothermal reduction reaction is 500°C to 800°C, with the average activation energy of each stage being 81.97 kJ/mol (α = 0.1–0.5), 65.17 kJ/mol (α = 0.5–0.75), and 69.86 kJ/mol (α = 0.75–1.0), respectively. In the microwave field, the carbothermal reduction reaction of raw materials can be completed at 600°C to obtain antimony, and the weight loss data of the carbothermal reduction process were recorded for the first time. The above results show that the microwave field enhanced the interfacial chemical effect, accelerated the interfacial diffusion from the metal phase to the oxide phase, and reduced the activation energy of the carbon thermal reduction process to 6.85 kJ/mol. The growth index of antimony grain growth process is estimated to be 4.33, controlled by the surface diffusion. These data provide a reliable theoretical basis for studying the reduction reactions of minerals in microwave fields.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140126626","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

Microencapsulation of pyriproxyfen using the particles from gas-saturated solutions process as a controlled-release system 利用气体饱和溶液颗粒工艺将吡丙醚微胶囊化为控释系统

IF 1.8 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-03-10 DOI: 10.1002/apj.3043

Tanjina Sharmin, Hiroyuki Tashiro, Hiroki Sakai, Kouichiro Shibata, Konoka Ema, Keiichi Irie, Tomomitsu Satho, Kenji Mishima

{"title":"Microencapsulation of pyriproxyfen using the particles from gas-saturated solutions process as a controlled-release system","authors":"Tanjina Sharmin, Hiroyuki Tashiro, Hiroki Sakai, Kouichiro Shibata, Konoka Ema, Keiichi Irie, Tomomitsu Satho, Kenji Mishima","doi":"10.1002/apj.3043","DOIUrl":"10.1002/apj.3043","url":null,"abstract":"The purpose of this investigation was to determine whether pyriproxyfen (PPF), a synthetic juvenile hormone analog (JHA), could be encapsulated in supercritical carbon dioxide (scCO2) using the process particles from the gas-saturated solutions (PGSS) for a controlled-release system. The PGSS process represents a promising two-step production system especially suited for the encapsulation and controlled-release system (CRS). In contrast to traditional encapsulation methods that often involve the use of harsh organic solvents or high temperatures, the PGSS process offers a gentler approach employing scCO2 as an alternative. The solubility of scCO2 in polymer (poly-ϵ-caprolactone [PCL]) allowed for the formation of PPF microparticles, and the particle size distribution could be controlled by adjustment of operating pressure and temperature. The obtained particles had a mean particle size of 73.6 ± 2 μm and encapsulation efficiency of 78.8 ± 9% at 60°C and 10 MPa. Furthermore, the in vitro dissolution profiles of PPF–PCL particles showed a low-level release pattern (42.5 ± 5 ppb/d) in water, followed by zero-order kinetics indicating a high-performance CRS. Finally, the in vivo bioassay using microparticles treated water exhibited 95%–100% emergence inhibition of mosquitoes, suggesting the effectiveness of PPF–PCL particles as a mosquito control agent.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140105275","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

Motion and interaction of in-line bubbles in quiescent non-aqueous solutions of hydrocarbon resin 碳氢化合物树脂静止非水溶液中在线气泡的运动和相互作用

IF 1.8 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-03-07 DOI: 10.1002/apj.3056

Li Mei, Denghan Luo, Zhongyao Zhang, Xiaopeng Chen, Lifang Huang, Jiezhen Liang, Xiaojie Wei, Bei Liu, Linlin Wang

{"title":"Motion and interaction of in-line bubbles in quiescent non-aqueous solutions of hydrocarbon resin","authors":"Li Mei, Denghan Luo, Zhongyao Zhang, Xiaopeng Chen, Lifang Huang, Jiezhen Liang, Xiaojie Wei, Bei Liu, Linlin Wang","doi":"10.1002/apj.3056","DOIUrl":"10.1002/apj.3056","url":null,"abstract":"Hydrocarbon resin (HR) is an essential fine chemical. The preparation and application process of HR involves lots of gas–liquid heterogeneous reactions, and the bubbly flow behavior influences them significantly. Using high-speed photography and digital image processing techniques, the motion and interaction of in-line bubbles in non-aqueous solutions of HR are examined in this article. The results show a critical gas flow rate that can change the bubbling regime. It can be observed that viscosity features prominently in changing the shape of bubbles and their motion. As the viscosity increases, the bubbles are more prone to coalescence, and the bubble coalescence process gradually changes from connected slip-rising coalescence to connected-rising coalescence. The viscosity transition region between non-coalescent and coalescent systems in non-aqueous solutions of HR occurs at 3.6–9.2 mPa·s. Further, a force analysis shows that in paired bubbles, the leading bubble can be viewed as an individual bubble unaffected by trailing bubble before the two bubbles collide, but in the wake of the leading bubble, the drag force on the trailing bubble decreases and the added mass force increases.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140097791","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

Flow stirred by open turbine: A modal analysis of multiscale flow characteristics 开放式涡轮搅拌流：多尺度流动特性的模态分析

IF 1.8 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-03-04 DOI: 10.1002/apj.3055

Jie Jin, Shaoyang Bu, Ying Fan, Jianjun Han, Kuangdi Yin, Wenyi Chen

{"title":"Flow stirred by open turbine: A modal analysis of multiscale flow characteristics","authors":"Jie Jin, Shaoyang Bu, Ying Fan, Jianjun Han, Kuangdi Yin, Wenyi Chen","doi":"10.1002/apj.3055","DOIUrl":"10.1002/apj.3055","url":null,"abstract":"The turbulence observed in the stirred tank is a result of the superposition of flows at different scales, each exerting various influences on the operational processes. To understand the flow characteristics associated with stirring, this paper undertakes particle image velocimetry (PIV) experimental research on an unbaffled tank stirred by an open turbine featuring four distinct blade deflection angles. The flow field in the unbaffled tank manifests as a double-circulation flow pattern; however, it is worth noting that the blade deflection angle exerts a significant impact on the stirring process. Specifically, when the blade deflection angle reached 90°, the flow discharge aligned closely with the radial direction, accompanied by pronounced fluctuations in the high-velocity region. The Lagrangian coherent structures (LCS) formed were subsequently extracted and subjected to finite-time Lyapunov exponent (FTLE) analysis. Notably, a more regular wake pattern emerged in proximity to the blade tip, while a larger scale flow structure persisted along the flow direction. To systematically analyze the flow field stirred by the open turbine, modal analysis was employed. By reconstructing the flow field based on the principle of 50% energy content, the decomposition of flows at different scales was achieved. The turbulent kinetic energy (TKE) generated by the various scale flows was subsequently calculated, revealing that the high TKE values primarily originate from the large-scale flow structure. Conversely, the TKE generated by the small-scale flow exhibits a uniform distribution across different regions. Notably, in regions characterized by higher velocities, the peak TKE associated with the small-scale flow also manifests; however, it is significantly smaller in magnitude compared to that generated by the original flow or the large-scale flow.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140045931","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