Chemical Engineering and Processing - Process Intensification最新文献

Multi-parameter co-optimization of SNCR denitration system in a large MSW incinerator 大型生活垃圾焚烧炉SNCR脱硝系统多参数协同优化

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-07-18 DOI: 10.1016/j.cep.2025.110458

Jun Liu , ShiHao Chen , Peng Wang , YingJie Jiang , Quan Zhang , Yunzhou Han , Jisheng Long

{"title":"Multi-parameter co-optimization of SNCR denitration system in a large MSW incinerator","authors":"Jun Liu , ShiHao Chen , Peng Wang , YingJie Jiang , Quan Zhang , Yunzhou Han , Jisheng Long","doi":"10.1016/j.cep.2025.110458","DOIUrl":"10.1016/j.cep.2025.110458","url":null,"abstract":"<div><div>The combustion of waste in incinerators generates toxic substances such as nitrogen oxides, which pose risks to both the environment and human health. Therefore, it is essential to control NO<sub>x</sub> emissions from incinerators. The in-furnace Selective Non-Catalytic Reduction (SNCR) system reduces NO<sub>x</sub> to nitrogen and water by injecting reducing agents (such as ammonia or urea). The operational parameters of the injection nozzles can significantly influence the denitrification efficiency, including factors such as the droplet size, injection velocity, spray angle, and injection angle of the reducing agent, which plays critical roles in the SNCR process. This study focused on a large-scale waste incinerator with a daily treatment capacity of 700 t/d, and the effects of different injection velocities, spray angles, injection angles, and droplet size distributions on denitrification efficiency were numerically investigated by coupling Fluent and FLIC software. Finally, a better operational results were obtained through Variable-controlling approach. The results indicated that when the injection velocity of the reducing agent increased from 40m/s to 60m/s, the denitrification efficiency at the furnace outlet was improved from 28.63 % to 36.73 %. When the droplet size increased from 100 μm to 300 μm, the denitrification efficiency rised from 36.73 % to 65.57 %. A relatively higher denitrification efficiency of 75.06 % was obtained when the spray angle is 20° and the injection angle is 10°</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110458"},"PeriodicalIF":3.8,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144678875","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

Low energy consumption achieved through hydrodynamic mixing of shear-thinning fluids in compact passive micromixers 在紧凑的被动微混合器中，通过剪切稀释流体的流体动力混合实现了低能耗

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-07-17 DOI: 10.1016/j.cep.2025.110453

Mokhtar Zaitri , Amar Kouadri , Embarek Douroum , Sadam Houcine Habib , Samir Laouedj , Juan Pedro Solano , Sofiane Khelladi

{"title":"Low energy consumption achieved through hydrodynamic mixing of shear-thinning fluids in compact passive micromixers","authors":"Mokhtar Zaitri , Amar Kouadri , Embarek Douroum , Sadam Houcine Habib , Samir Laouedj , Juan Pedro Solano , Sofiane Khelladi","doi":"10.1016/j.cep.2025.110453","DOIUrl":"10.1016/j.cep.2025.110453","url":null,"abstract":"<div><div>This study investigates the mixing performance of compact chaotic microdevices for Newtonian and non-Newtonian Shear-Thinning fluids in microfluidic applications. Building upon the notable mixing characteristics of the Two-Layer Crossing Channels Micromixer (TLCCM-X) with Newtonian fluids, we developed modified designs (TLCCM-KX and TLCCM-O) to enhance mixing efficiency. Numerical simulations were conducted using CFD code to solve Navier-Stokes, mass conservation, and species transport equations. The species transport model was implemented to analyze the mixing process of pseudoplastic carboxymethyl cellulose (CMC) solutions, characterized by the power-law model with flow behavior indices ranging from 0.49 to 1 and generalized Reynolds numbers from 0.2 to 70. Mixing effectiveness was evaluated through hydrodynamic mixing degree calculated across various cross-sectional areas, where a value of 1 represents perfect mixing. Our comprehensive analysis included mass fraction contours, streamlines, shear rate curves, pressure drops, Poiseuille number to the hydrodynamic mixing degree (Po/HMD) ratios, and mixing energy costs. Results demonstrate that the TLCCM-O micromixer exhibits the most energy-efficient device among those studied, requiring significantly lower mixing energy costs. This makes the TLCCM-O particularly promising for applications where energy efficiency is critical considerations, representing advancement in micromixer technology for both Newtonian and non-Newtonian fluid applications.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110453"},"PeriodicalIF":3.8,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144678873","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

Cyclic distillation: a high-efficiency alternative for sustainable propane-propylene separation with reduced cost 循环蒸馏：一个高效的替代可持续丙烷-丙烯分离与降低成本

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-07-15 DOI: 10.1016/j.cep.2025.110449

Neha Agarwal, Nguyen Nhu Nga, Raisa Aulia Hanifah, Minkyu Kim, Moonyong Lee

{"title":"Cyclic distillation: a high-efficiency alternative for sustainable propane-propylene separation with reduced cost","authors":"Neha Agarwal, Nguyen Nhu Nga, Raisa Aulia Hanifah, Minkyu Kim, Moonyong Lee","doi":"10.1016/j.cep.2025.110449","DOIUrl":"10.1016/j.cep.2025.110449","url":null,"abstract":"<div><div>Separation of propane and propylene continues to be one of the petrochemical industry's most energy-demanding processes, with high capital cost, mainly because of the very small boiling point difference between them, which requires very challenging separation methods. Here, cyclic distillation is proposed especially for super fractionators, which provides outstanding separation efficiency while greatly reducing both equipment size and the amount of energy needed. The system realizes 99.9 % high-purity separation of both propane and propylene using 54 trays, compared to 140 trays in conventional systems, a 61 % reduction. Additionally, the reboiler duty is also decreased from 21 GJ/hr to 12 GJ/hr, which is 43 % less in terms of energy usage. The McCabe-Thiele analysis emphasizes the inherent benefits of cyclic operation in which periodic vapor-liquid dynamics make use of beneficial thermodynamic conditions to ensure high separation quality. Periodic operation also boosts internal efficiency by decreasing the pinch effect and accommodating lower flow rates of vapor, which further ensures an energy economy without compromising separation quality. It is the only distillation mode that has both features of continuous distillation as well as batch distillation, bringing about intensified phase contact, better use of energy, as well as enhanced separation efficiency, especially in the case of near-boiling constituents in the system.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110449"},"PeriodicalIF":3.8,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144678874","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

Crude palm stearin: A green and fast fractionation method to obtain a natural oil structuring agent 棕榈硬脂：一种绿色、快速的分离方法，可获得天然的油结构剂

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-07-15 DOI: 10.1016/j.cep.2025.110450

Diego Canizares , Tiago A.B.B. Cavalcante , Pedro A. Pessoa Filho , Maria A. Mauro

{"title":"Crude palm stearin: A green and fast fractionation method to obtain a natural oil structuring agent","authors":"Diego Canizares , Tiago A.B.B. Cavalcante , Pedro A. Pessoa Filho , Maria A. Mauro","doi":"10.1016/j.cep.2025.110450","DOIUrl":"10.1016/j.cep.2025.110450","url":null,"abstract":"<div><div>This work investigated the effect of temperature control on crystallization and centrifugation of the crude palm oil aiming to fractionate it into crude palm stearin (CPS) and crude palm olein (CPO), and to explore the potential use of CPS as a structuring agent for soybean oil.Fractionation was carried out using a slightly modified oil-binding capacity method, where the temperatures of 10, 15, 20, and 25 °C were applied at crystallization and centrifugation. Purity of CPO was demonstrated through differential scanning calorimetry. Further, CPS fraction was evaluated as structuring agent for soybean oil carrying out differential scanning calorimetry, small-angle controlled stress dynamic rheology, polarized light microscopy, and X-ray diffraction analyses. A strong influence of temperature was observed on the CPS and CPO fractions yields. The 25 °C was considered the best temperature for crystallization and centrifugation. The CPS in soybean oil at 50 % (w/w) developed a solid-like behavior due to dispersion of needle-like crystal organized in cluster. Thermal and rheological behavior, and crystal-like morphology and crystallinity observed are similar to the frequently repported on organogels, indicating its potential as a natural and minimally processed ingredient or additive for food and pharmaceutical formulations.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110450"},"PeriodicalIF":3.8,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144670570","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

Integrating vapor recompression heat pump into n-propyl acetate reactive distillation process for decarbonization and performance enhancement 将蒸汽再压缩热泵集成到醋酸正丙酯反应精馏过程中，实现脱碳和性能提升

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-07-14 DOI: 10.1016/j.cep.2025.110447

Lianghui Ding, Yu Zhou, Pengcheng Sun, Xinyi Lv, Jifa Qu, Yunbo Xue

{"title":"Integrating vapor recompression heat pump into n-propyl acetate reactive distillation process for decarbonization and performance enhancement","authors":"Lianghui Ding, Yu Zhou, Pengcheng Sun, Xinyi Lv, Jifa Qu, Yunbo Xue","doi":"10.1016/j.cep.2025.110447","DOIUrl":"10.1016/j.cep.2025.110447","url":null,"abstract":"<div><div>Vapor recompression technique (VRC) is one of the crucial strategies for process electrification and decarbonization within the New Industry 4.0 paradigm. This work explores the application of VRC, involving the novel intermediate reboiler (IR)-assisted VRC configuration, in the reactive distillation system for n-propyl acetate (PrAc) synthesis via transesterification of methyl acetate (MeAc) and n-propanol (PrOH). The conventional reactive distillation process (CRD), composed of a wide-boiling RD column and a sequential distillation column, is highly energy-intensive due to the existence of azeotropes. Process alternatives, incorporating double-effect distillation (DE), VRC and VRC-IR technologies, are proposed to save energy. In the optimization of the VRC-IR-assisted processes, the effects of crucial parameters, such as the side stream locations, the duty that associated with the IR and the compression ratio, on process intensification are discussed. The processes proposed are subsequently evaluated in terms of economic, environmental, and thermodynamic perspectives. Both VRC-assisted flowsheets demonstrate superior performance over the CRD and RD-DE cases. The RD-VRCIR-VRC, simultaneously intensifying VRC-IR and VRC in the two separate columns, emerges as the most efficient option, showcasing remarkable reductions of 48.16 % in TAC, 79.92 % in CO<sub>2</sub> emissions and significant improvement of thermodynamic efficiency by 92.79 % compared with the CRD design.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110447"},"PeriodicalIF":3.8,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144656370","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

Desalination systems for minimal and zero liquid discharge purposes: A review 用于最小和零液体排放目的的海水淡化系统：综述

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-07-13 DOI: 10.1016/j.cep.2025.110442

N. Anjomani , S. Shamshiri , A. Babapoor , Z. Rahimi-Ahar , M. Mastani Joybari , M. Khiadani

{"title":"Desalination systems for minimal and zero liquid discharge purposes: A review","authors":"N. Anjomani , S. Shamshiri , A. Babapoor , Z. Rahimi-Ahar , M. Mastani Joybari , M. Khiadani","doi":"10.1016/j.cep.2025.110442","DOIUrl":"10.1016/j.cep.2025.110442","url":null,"abstract":"<div><div>Freshwater reserves are being depleted as a result of natural and production processes, including industrialization, agriculture, and rapid population growth. Water scarcity can be effectively compensated for with various desalination techniques. However, the release of high concentrate brine from the desalination systems is the major environmental concern. As such, minimal or zero liquid discharge (MLD or ZLD) desalination techniques are vital for high water recovery and zero waste production. This study aims to review recent literature on the use and management of brine from various sectors of brine production and seawater desalination industries using MLD and ZLD technologies. Thermal, membrane, and hybrid desalination systems are also reviewed with a focus on highlighting the operating principles, advantages, and challenges. It can be concluded that hybrid systems have the lowest specific energy consumption (SEC) and cost compared to membrane and thermal systems. Multi-effect desalination/multi-stage flash (MED-MSF) has the lowest SEC of 1.107 kWh.m<sup>−3</sup> and a water recovery of 98 %. Furthermore, ZLD desalination systems consume less energy when pretreatment techniques are applied before the thermal process. The hybrid MD-MSF-Cr process has the lowest cost with a cost of 0.62 $.m<sup>−3</sup> (with a water recovery of 89 %).</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110442"},"PeriodicalIF":3.8,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144634150","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 and experimental analysis of droplet dynamics in constricted milli and microchannels 微孔道和微孔道中液滴动力学的数值和实验分析

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-07-13 DOI: 10.1016/j.cep.2025.110448

A.T.S. Cerdeira , J.B.L.M. Campos , J.M. Miranda , J.D.P. Araújo

{"title":"Numerical and experimental analysis of droplet dynamics in constricted milli and microchannels","authors":"A.T.S. Cerdeira , J.B.L.M. Campos , J.M. Miranda , J.D.P. Araújo","doi":"10.1016/j.cep.2025.110448","DOIUrl":"10.1016/j.cep.2025.110448","url":null,"abstract":"<div><div>This study investigates the dynamics of droplets flowing through constricted channels at milli and microscales using a combination of experimental and numerical approaches. Experiments were conducted in a 3D-printed millichannel with three immiscible fluid pairs, spanning a wide range of viscosity ratios between dispersed and continuous phases (10<sup>–2</sup><X<10<sup>2</sup>) and Capillary numbers of the continuous phase (10<sup>-</sup><sup>4</sup><Ca<sub>c</sub><10<sup>-</sup><sup>1</sup>). Numerical simulations, employing the Volume of Fluid (VOF) methodology and performed with Ansys FLUENT® 2021 R2, complemented the experiments by exploring two geometrical scales: milli (aspect ratio: 5:3 at the inlet channel; 1:3 in the constricted region) and micro (aspect ratio: 5:1.5 before the contraction; 1:1.5 after contraction). For milliscale simulations, X ranged from 10<sup>–1</sup> to 10<sup>2</sup> and Ca<sub>c</sub> from 10<sup>–3</sup> to 10<sup>–1</sup>, while in microscale simulations, 10<sup>–2</sup><X<10<sup>2</sup> and 10<sup>–4</sup><Ca<sub>c</sub><10<sup>0</sup>. A comprehensive analysis of velocity profiles, film thickness, and droplet deformation was conducted numerically. Strong agreement between experimental and numerical results for average droplet velocity and length within the constricted region validated the computational model’s robustness. This work elucidates the influence of Ca<sub>c</sub> and X on droplet deformation, velocity, and film thickness, providing valuable insights into the optimization of multiphase microfluidic systems.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110448"},"PeriodicalIF":3.8,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144666054","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

Scale-up of a thermally coupled milli-scale wall coated reactor through a fractals-based reactor design approach 基于分形反应器设计方法的热耦合毫微米级壁包覆反应器的放大研究

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-07-11 DOI: 10.1016/j.cep.2025.110445

Md. Malik Nawaz Khan, Sreenivas Jayanti

{"title":"Scale-up of a thermally coupled milli-scale wall coated reactor through a fractals-based reactor design approach","authors":"Md. Malik Nawaz Khan, Sreenivas Jayanti","doi":"10.1016/j.cep.2025.110445","DOIUrl":"10.1016/j.cep.2025.110445","url":null,"abstract":"<div><div>As an alternative to thermally inefficient packed bed reactors, micro-scale reactors have been researched extensively due to their excellent heat and mass transfer characteristics. Nevertheless, their scope is restricted within specialty chemicals and other low volume production processes because of high pressure drop and difficulty in scale-up. Wall-coated milli-scale reactor combine merits of both packed bed and micro-scale reactors as they have low thermal resistances with high flow capacities at negligible pressure drop. Literature on milli-scale reactors is scarce. In this work we study scale up of a dual-channel milli-scale thermally integrated reactor. It is shown that the fractals-based Hilbert curve, when used as a generating function for the scaled-up reactor structure (HR), provides a systematic and compact way of scale-up of the dual-channel milli-scale reactor. The case of process intensification by a factor of up to 300 in terms of the integrated reaction rate is illustrated through CFD modelling. Effects of varying inlet and wall boundary conditions in the dual-channel reactor and the HR reactor are explored. The intensified reactor can be manufactured with accuracy and repeatability by additive manufacturing techniques.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110445"},"PeriodicalIF":3.8,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144666053","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

Enzymatic hydrolysis of used cooking oil and palm olein using a Starbon-immobilized Candida Antarctica lipase B 用星固定化南极假丝酵母脂肪酶B酶解废食用油和棕榈油

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-07-11 DOI: 10.1016/j.cep.2025.110443

Alexander Baena , Alvaro Orjuela , Laura R. Conde

{"title":"Enzymatic hydrolysis of used cooking oil and palm olein using a Starbon-immobilized Candida Antarctica lipase B","authors":"Alexander Baena , Alvaro Orjuela , Laura R. Conde","doi":"10.1016/j.cep.2025.110443","DOIUrl":"10.1016/j.cep.2025.110443","url":null,"abstract":"<div><div>This study investigated the enzymatic hydrolysis of UCOs and refined palm olein using <em>Candida Antarctica lipase B</em> (CALB) immobilized on a mesoporous carbon (Starbon A800), and commercial immobilized lipases (Lipozyme TLIM and Novozyme 435). Various immobilization techniques were assessed, with physisorption onto an amino-functionalized surface followed by crosslinking (CALBAC3) providing the best results, achieving the highest enzyme loading (11.3 wt. %), anchoring efficiency (56.36 %), and hydrolytic activity (136.5 LU/g). Activity remained stable at pH 6–7.3, with optimal performance at 45–50 °C. The best hydrolytic activity was achieved at 45 °C, pH 7, 7.0 wt. % enzyme loading, ultrasonic mixing during initial 120 min at 100 W and 37 kHz, a 1:30 oil-to-water ratio, and mechanical stirring at 300 rpm. Under these conditions, conversion reached 91.04 ± 3.92 %. The obtained data were used to correlate kinetic expressions using the Michaelis-Menten-type and water-inhibition models, and they agreed reasonably well with experiments showing relative errors below 2 %. Despite high initial activity comparable to Novozyme 435, CALBAC3 exhibited a significant drop in performance after reuse, likely due to mechanical instability of the support and enzyme immobilization strength. Future work should focus on enhancing the support strength, optimizing mesoporous pore distribution, and exploring alternative crosslinking strategies.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110443"},"PeriodicalIF":3.8,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144656366","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

Towards hydrogen production by methane pyrolysis in a microwave-assisted fluidized bed reactor: Hydrodynamics of a catalytic fluidized bed and 1D convection-dispersion modelling 微波辅助流化床反应器中甲烷热解制氢：催化流化床流体动力学和一维对流-分散模型

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-07-08 DOI: 10.1016/j.cep.2025.110440

Robert Cherbański, Stanisław Murgrabia, Leszek Rudniak, Eugeniusz Molga, Andrzej Stankiewicz, Tomasz Kotkowski

{"title":"Towards hydrogen production by methane pyrolysis in a microwave-assisted fluidized bed reactor: Hydrodynamics of a catalytic fluidized bed and 1D convection-dispersion modelling","authors":"Robert Cherbański, Stanisław Murgrabia, Leszek Rudniak, Eugeniusz Molga, Andrzej Stankiewicz, Tomasz Kotkowski","doi":"10.1016/j.cep.2025.110440","DOIUrl":"10.1016/j.cep.2025.110440","url":null,"abstract":"<div><div>This study investigates the minimum fluidization velocity (<span><math><msub><mi>U</mi><mrow><mi>m</mi><mi>f</mi></mrow></msub></math></span>) of Fe/C catalyst and presents preliminary modelling results for a microwave-assisted fluidized bed reactor (MAFBR). The hydrodynamics was examined experimentally and through a Discrete Element Method-Computational Fluid Dynamics (DEM-CFD) modelling approach. A satisfactory agreement was observed between the experimentally determined <span><math><msub><mi>U</mi><mrow><mi>m</mi><mi>f</mi></mrow></msub></math></span> and the value predicted by the model, which assumed a spherical shape for Fe/C catalyst particles as a simplification. Further testing of the model using reference glass beads highlighted the importance of incorporating particle shape factors and particle size distribution for improved accuracy. The model also demonstrated good performance when applied to a mixture of two different glass bead fractions. Additionally, MAFBR modelling was conducted using an axially dispersed plug flow model, incorporating a CH<sub>4</sub> pyrolysis rate equation for the Fe/C catalyst formulated in our previous work [1]. The model provided insight into FBR behaviour under varying conditions including temperature, catalyst mass and methane flow rate. Such approach provides basis for the MAFBR design.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110440"},"PeriodicalIF":3.8,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605501","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