Chemical Engineering and Processing - Process Intensification最新文献_第2页

Recent progresses in intensified heat exchanger reactors with millimetric zigzag channels 带毫米人字形通道的强化热交换器反应器的最新进展

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-10-20 DOI: 10.1016/j.cep.2024.110030

引用次数: 0

CFD simulation of power characteristics and flow field distribution of different spiral stirring paddles 不同螺旋搅拌桨动力特性和流场分布的 CFD 仿真

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-10-20 DOI: 10.1016/j.cep.2024.110033

引用次数: 0

Intensification of fine particle flotation with less energy input using vortex generators 利用涡流发生器减少能量输入，强化细颗粒浮选工艺

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-10-18 DOI: 10.1016/j.cep.2024.110032

{"title":"Intensification of fine particle flotation with less energy input using vortex generators","authors":"","doi":"10.1016/j.cep.2024.110032","DOIUrl":"10.1016/j.cep.2024.110032","url":null,"abstract":"<div><div>The separation of fine mineral particles has always been challenging in flotation. Previous studies generally believed that intensifying fine particle flotation necessarily involves higher energy expenditure. To explore the more effective intensification, this study measured the flotation performance of diaspore particles smaller than 20 µm in a mineralization pipe. The energy input was regulated by varying the slurry flow rate in the mineralization pipe and incorporating wedge-shaped vortex generator (VG) with different pinch angles. The results of flotation tests indicated that introduction of VG can achieve superior flotation performance with reduced energy input. A flotation rate of 0.86/min was obtained in the mineralization pipe with VG and a pinch angle of 60° (VGP-60) at an energy input of 27.29 W, much higher than that of 0.53 /min in empty pipe at 37.59 W. The more effective intensification is attributed to the high turbulent dissipation rate (<em>ε</em>) induced by VG. The volume-averaged <em>ε</em> in VGP-60 is 31.8 m<sup>2</sup>/s<sup>3</sup> at an energy input of 27.29 W, exceeding that in empty pipe at 37.59 W. The increased <em>ε</em> enhances the collision rate between particles and bubbles, thus causing the flotation rate to grow as a power function with exponent of 0.5.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527974","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

Process intensification technologies to enhance agricultural sustainability and safety 提高农业可持续性和安全性的加工强化技术

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-10-16 DOI: 10.1016/j.cep.2024.110029

引用次数: 0

Dynamic modeling and modification of ternary semicontinuous distillation without a middle vessel for improved controllability and energy performance 对无中间容器的三元半连续蒸馏进行动态建模和改进，以提高可控性和能效

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-10-16 DOI: 10.1016/j.cep.2024.110021

{"title":"Dynamic modeling and modification of ternary semicontinuous distillation without a middle vessel for improved controllability and energy performance","authors":"","doi":"10.1016/j.cep.2024.110021","DOIUrl":"10.1016/j.cep.2024.110021","url":null,"abstract":"<div><div>Ternary distillation conventionally requires two sequential columns. In a process intensification technique, the second column is eliminated by operating the first column in a cyclic manner, where the intermediate component is withdrawn periodically from a side stream. This process, called semicontinuous distillation (SCD) without a middle vessel, can lower the separation costs significantly. However, it exhibits controllability challenges due to the periodic recycling of the side stream. In this work, the process controllability is improved by adding a surge tank in the side stream recycle path. The modification increases significantly the process robustness without changing the operation recipe. Also, the modified SCD can lower maintenance costs as the manipulated variables experience milder oscillations. Moreover, it is shown to have a faster startup than the original design, yielding about 13 % energy saving per feed processed and processing about 25 % more feed during the startup compared with the original design. The case studies show the surge tank volume should be chosen based on the trade-off between attenuation of undesired disturbances and slow-down of desired control actions. Also presented in this article is detailed hybrid discrete-continuous dynamic modeling of the SCD and how the resulting model is implemented in the open-source software OpenModelica.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527973","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

High performance of heterogeneous catalytic ozonation for tetracycline removal by a N-doped biochar derived from co-pyrolysis of sludge and water hyacinth 利用污泥和布袋莲共同热解产生的掺杂 N 的生物炭实现异相催化臭氧去除四环素的高性能化

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-10-16 DOI: 10.1016/j.cep.2024.110031

{"title":"High performance of heterogeneous catalytic ozonation for tetracycline removal by a N-doped biochar derived from co-pyrolysis of sludge and water hyacinth","authors":"","doi":"10.1016/j.cep.2024.110031","DOIUrl":"10.1016/j.cep.2024.110031","url":null,"abstract":"<div><div>Enhancing the performance of heterogeneous catalytic ozonation (HCO) for contaminant removal using biochar that is both cost-effective and stable is of great significance. In this research, a novel nitrogen-doped biochar (HSBC) was synthesized through the co-pyrolysis of sludge and water hyacinth. The presence of pyrrolic N, pyridinic N and graphitic N in HSBC as well as the high-temperature co-pyrolysis process, conferred a high degree of graphitization to the biochar. The graphitic N species facilitated the generation of free radicals, while the graphitic structure enhanced electron transfer between the catalyst and tetracycline (TC). HSBC demonstrated exceptional efficiency in TC removal via HCO, achieving a 93% removal rate within just 130 min. Moreover, the biodegradability of actual printing and dyeing wastewater with a chemical oxygen demand (COD) of (9900 mg/L) was increased sevenfold after HCO treatment. This study offers new perspectives on the preparation of N-doped biochar and its practical application in the treatment of industrial wastewater through HCO processes.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527969","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

Ultrasound assisted interesterification of babassu oil with acetates using acid catalysts for biodiesel and triacetin production 使用酸催化剂超声辅助巴巴苏油与醋酸盐的酯化反应，以生产生物柴油和三醋精

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-10-15 DOI: 10.1016/j.cep.2024.110028

{"title":"Ultrasound assisted interesterification of babassu oil with acetates using acid catalysts for biodiesel and triacetin production","authors":"","doi":"10.1016/j.cep.2024.110028","DOIUrl":"10.1016/j.cep.2024.110028","url":null,"abstract":"<div><div>The ultrasound-assisted (US) interesterification of babassu oil with methyl, ethyl and butyl acetates was carried out via acid catalysis for biodiesel production with triacetin as an additive and therefore filling the gap in the field of US induced interesterification reactions. The scanning for the best catalyst was performed using sulfuric, methanesulfonic, p-toluenesulfonic, phosphoric and acetic acids. In order to achieve optimal conditions reactions varied in terms of reactant molar ratio, type and concentration of catalyst, temperature (20 to 50 °C) and ultrasonic energy (120 to 320 W). Using ethyl acetate, reactions were carried out at various molar ratios of oil to acetate (1:12 to 1:72) using sulfuric acid (0.5 % w/w<sub>T</sub>). The 1:60 experiments were carried out with sulfuric acid concentrations ranging from 0.5 % to 3 % (w/w<sub>T</sub>). The best catalytic activity was sought using the acids at a concentration of 2.5 %, with 200 W and 1:60. The best catalytic activities were achieved with H<sub>2</sub>SO<sub>4</sub> followed by CH<sub>3</sub>SO<sub>3</sub>H and CH<sub>3</sub>C<sub>6</sub>H<sub>4</sub>SO<sub>3</sub>H and the reactivity follows the ethyl→methyl→butyl trend. The best results were achieved using ethyl acetate with H<sub>2</sub>SO<sub>4</sub> yielding 95.4 % biodiesel plus triacetin with a content of 17.6 % of triacetin in 180 min, which represents an intensification of 25.4 % compared to conventional heating.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527967","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

Energy-efficient optimization design of bio-butanol fermentation broth purification process 生物丁醇发酵液净化工艺的节能优化设计

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-10-15 DOI: 10.1016/j.cep.2024.110023

{"title":"Energy-efficient optimization design of bio-butanol fermentation broth purification process","authors":"","doi":"10.1016/j.cep.2024.110023","DOIUrl":"10.1016/j.cep.2024.110023","url":null,"abstract":"<div><div>To address the downstream processing challenges of the IBE (isopropanol-butanol-ethanol) system and obtain biobutanol products with a mass fraction of 0.9999, as well as obtain a mass fraction of 0.99975 for the IE (isopropanol-Ethanol) mixture product as a gasoline additive, this study proposes a four-column distillation process termed \"Dehydration-Butanol-Extractive Four Column Distillation\" (DBE-4CD). With the heat load as the optimization target, the DBE-4CD process was optimized to determine the optimal operating parameters. Based on the optimized process and considering the energy-saving potential of the dividing wall column, an “Azeotropic Dividing Wall-Extractive Three Column Distillation” (ADE-3CD) process was subsequently proposed to further enhance energy efficiency and reduce consumption. Compared to both conventional literature process and the DBE-4CD process, the total load of the ADE-3CD process decreased to 7433.5 kW, representing reductions of 20.35% and 10.11%, respectively. Additionally, the mass recovery rates of butanol and the IE mixture reached 99.90% and 99.64%, respectively, exceeding those of the conventional literature process, which were 99.11% and 99.18%.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446805","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

Salt scaling dynamics in microfluidic channels: Impact of channel geometry and process parameters 微流体通道中的盐缩放动力学：通道几何形状和工艺参数的影响

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-10-15 DOI: 10.1016/j.cep.2024.110025

{"title":"Salt scaling dynamics in microfluidic channels: Impact of channel geometry and process parameters","authors":"","doi":"10.1016/j.cep.2024.110025","DOIUrl":"10.1016/j.cep.2024.110025","url":null,"abstract":"<div><div>Salt scaling, a prevalent challenge in industrial processes, often leads to reduced efficiency, equipment failure, and environmental impact. Understanding and mitigating scaling in miniaturized systems for process intensification applications is crucial. In this study, we indigenously developed and utilized microfluidic reactors to investigate calcium carbonate (CaCO<sub>3</sub>) scaling dynamics in microfluidic channels, offering real-time visualization under continuous flow; a significant advancement over static methods. We explore the impact of channel geometry (curvature of 0°, 45°, 90°, and 135°) and process parameters (temperature, supersaturation index (SI), and flow velocity) on CaCO<sub>3</sub> deposition behavior. Our findings reveal significant influences: higher temperature and SI promote deposition, while microchannel curvature and increased flow velocity enhance removal. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses confirmed the morphology and phase changes of the deposited CaCO<sub>3</sub>. Calcite and aragonite were the dominant polymorphs, with their occurrence influenced by temperature and SI. These insights can be translated to the design and operation of miniaturized equipment for process intensification, such as micro heat exchangers. By understanding and controlling scaling phenomena, this research might pave the way for improved performance, sustainability, and resource efficiency in various industrial settings.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446806","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

Numerical simulation of fluid flow characteristics and ultrasonic cavitation performance in novel-designed stirred tank sonoreactor 新型搅拌槽超声反应器中流体流动特性和超声空化性能的数值模拟

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-10-15 DOI: 10.1016/j.cep.2024.110026

{"title":"Numerical simulation of fluid flow characteristics and ultrasonic cavitation performance in novel-designed stirred tank sonoreactor","authors":"","doi":"10.1016/j.cep.2024.110026","DOIUrl":"10.1016/j.cep.2024.110026","url":null,"abstract":"<div><div>A novel-designed stirred tank sonoreactor was developed to well solve large-scale dispersion of nanoparticles in liquid phase system. The fluid flow characteristics and ultrasonic cavitation performance in the sonoreactor were numerically simulated by CFD method. By comparing the pressure, cavitation bubble and velocity distribution under different situations, it is found that larger ultrasonic amplitude, relatively smaller ultrasonic frequency, higher saturated vapor pressure and lower viscosity of liquid medium are beneficial to ultrasonic cavitation. Besides, the acoustic flow action is strengthened with the increase of ultrasonic frequency and decrease of gas-liquid mixture's average density. For the designed sonoreactor, it is critical that high-frequency transducers should be determined near the bottom and upper region of the kettle, and large-amplitude transducers can be confirmed in the middle position. The research findings will provide theoretical and technical supports for developing state-of-the-art sonoreactors and optimizing ultrasonic process parameters in the industrialized preparation of nanocomposites.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527966","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