Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa最新文献_第9页

Maximization of generated electric power in the TEG module at various heat exchange conditions 在各种热交换条件下，最大限度地提高TEG模块的发电量

4区工程技术

Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa Pub Date : 2023-11-06 DOI: 10.24425/cpe.2020.136013

引用次数: 0

The effect of capillary pumping on the course of cleaning porous materials containing liquid contaminants using supercritical fluids – A pore network study 毛细管泵送对超临界流体清洗含液体污染物多孔材料过程的影响——孔隙网络研究

4区工程技术

Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa Pub Date : 2023-11-06 DOI: 10.24425/cpe.2021.138935

{"title":"The effect of capillary pumping on the course of cleaning porous materials containing liquid contaminants using supercritical fluids – A pore network study","authors":"","doi":"10.24425/cpe.2021.138935","DOIUrl":"https://doi.org/10.24425/cpe.2021.138935","url":null,"abstract":"The role of capillary pumping on the course of cleaning porous materials containing liquid contaminants using supercritical ﬂuids was investigated numerically. As a speciﬁc process to be modelled, cleaning of porous membranes, contaminated with soybean oil, using supercritical carbon dioxide as the cleaning ﬂuid (solvent) was considered. A 3D pore-network model, developed as an extension of a 2D drying model, was used for performing pore scale simulations. The inﬂuence of various process parameters, including the coordination number of the pore network, the computational domain size, and the external ﬂow mass transfer resistance, on the strength of the capillary pumping eﬀect was investigated. The capillary pumping eﬀect increases with increasing domain size and decreasing ex-ternal ﬂow mass transfer resistance. For low coordination numbers of the pore network, the capillary pumping eﬀect is not noticeable at macro scale, while for high coordination numbers, the opposite trend is observed – capillary pumping may inﬂuence the process at macro scale. In the investigated system, the coordination number of the pore network seems to be low, as no capillary pumping eﬀects were observed at macro scale during experimental investigation and macro-scale modelling of the membrane cleaning process.","PeriodicalId":55267,"journal":{"name":"Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa","volume":"179 1‐2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135679376","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

Energetic efficiency of mixing in a periodically reoriented Dean flow 周期性重定向迪安流中混合的能量效率

4区工程技术

Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa Pub Date : 2023-11-06 DOI: 10.24425/cpe.2021.138937

{"title":"Energetic efficiency of mixing in a periodically reoriented Dean flow","authors":"","doi":"10.24425/cpe.2021.138937","DOIUrl":"https://doi.org/10.24425/cpe.2021.138937","url":null,"abstract":"The energetic eﬃciency of mixing is studied numerically in a continuous ﬂow mixer constructed from a sequence of alternately twisted pipe bends. Counter-rotating vortices present in the curved channels and known as Dean vortices narrow the distribution of the residence time of ﬂuid elements and accelerate the generation of a new material surface without obstructing the main ﬂow and increasing the risk of fouling or ﬂow stoppage. Cyclic twisting of the pipe curvature allows for quick reorientation of Dean vortices. The reorientation induces chaotic advection in a stable three-dimensional ﬂow and speeds up mixing. The eﬀect of computational domain discretisation for the low and medium Reynolds numbers (20 < Re < 2000 ) on the head loss, primary and secondary ﬂow, residence time distribution, and the energetic eﬃciency of generation of the inter material surface is determined. The energetic eﬃciency is calculated in the time space, a standard approach in modelling reactive micromixing, and at the reactor exit. The maximum energetic eﬃciency is determined for Re ≈ 600 ÷ 700. It is also found that the initial orientation of the material surface to the pipe curvature has a signiﬁcant impact on the energetic eﬃciency of mixing.","PeriodicalId":55267,"journal":{"name":"Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa","volume":"214 1‐2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135679694","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

Intensification of beech wood drying process using microwaves 微波强化山毛榉木材干燥过程

4区工程技术

Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa Pub Date : 2023-11-06 DOI: 10.24425/cpe.2019.126110

Kinga Rajewska, Anna Smoczkiewicz-Wojciechowska, Jerzy Majka

引用次数: 3

Power characteristics of inline rotor-stators with different head designs 不同封头设计直列转子-定子的功率特性

4区工程技术

Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa Pub Date : 2023-11-06 DOI: 10.24425/cpe.2021.137343

{"title":"Power characteristics of inline rotor-stators with different head designs","authors":"","doi":"10.24425/cpe.2021.137343","DOIUrl":"https://doi.org/10.24425/cpe.2021.137343","url":null,"abstract":"In-line rotor-stators are widely used for power intensive industrial applications, such as deagglomera-tion, emulsiﬁcation. There is limited information on characteristic power numbers for diﬀerent designs which can be used to calculate the average power input as a means to evaluate process performance. This study made use of 18 diﬀerent rotor-stators, 17 of which were toothed designs with diﬀerent geometry, and also a commercially available design, with the objectives of evaluating the applicability of diﬀerent expressions for characteristic power numbers and establishing the eﬀects of geometric variations on the power input. The expression 𝑃 = 𝑃𝑜 1 𝜌𝑁 3 𝐷 5 + 𝑃𝑜 2 𝜌𝑁 2 𝐷 2 𝑄 is found to account for the experimental data over a wide range of operating conditions. Rotor diameter was found to have the most prominent eﬀect on the power input: an increase in rotor diameter from 119.6 to 123.34 mm resulted in an increase in the average power draw. The eﬀect of rotor diameter examined with geometrically similar set ups reducing the diameter from 123.34 to 61.44 mm, for which the mixing chamber was also proportionately smaller, showed a decrease in the power input at a given speed and ﬂowrate as well. The eﬀects relating to the percentage of open area of the stator and number of rotor teeth were less obvious. Increasing the open area resulted in an increase in the power input – an eﬀect which could be observed more clearly as the ﬂowrate (1 to 4 l/s) and rotor speed (at 2000 and 3000 rpm) were also increased. Increasing the number of stator teeth increased the power input and this eﬀect was more prominent when operating at the highest rotor speed of 3000 rpm and at low ﬂowrates (1–2 l/s).","PeriodicalId":55267,"journal":{"name":"Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa","volume":"159 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135679216","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 flow, low shear impellers versus high shear impellers; dispersion of oil drops in water and other examples 大流量，低剪切叶轮与高剪切叶轮;油滴在水中的分散和其他例子

4区工程技术

Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa Pub Date : 2023-11-06 DOI: 10.24425/cpe.2021.137342

{"title":"High flow, low shear impellers versus high shear impellers; dispersion of oil drops in water and other examples","authors":"","doi":"10.24425/cpe.2021.137342","DOIUrl":"https://doi.org/10.24425/cpe.2021.137342","url":null,"abstract":"Flow patterns generated by two ChemShear impellers, CS 2 and CS 4 have been measured and ﬂow numbers calculated; Fl = 0 . 04 for both impellers. Transient and equilibrium drop sizes, 𝑑 32 μ m of 3 diﬀerent viscosity silicone oils agitated by a high-shear Rushton turbine, RT, a low-shear, high-ﬂow HE3 impeller and the two ChemShears were determined. The equilibrium 𝑑 32 are correlated for all impellers, by 𝑑 32 = 1300 ( 𝜀 𝑇 ) − 0 . 58 max.sv 𝑣 0 . 14 with an 𝑅 2 = 0 . 94. However, the time to reach steady state and the equilibrium size at the same speciﬁc power do not match the above descriptors of each impeller’s characteristics. In other literature, these descriptors are also misleading. In the case of mixing time, a high shear RT of the same size as a high ﬂow HE3 requires the same time at the same speciﬁc power in vessels of 𝐻 / 𝑇 = 1. In bioprocessing, where concern for damage to cells is always present, free suspension animal cell culture with high shear RTs and low-shear impellers is equally eﬀective; and with mycelial fermentations, damage to mycelia is greater with low shear than high. The problems with these descriptors have been known for some time but mixer manufacturers and ill-informed users and researchers continue to employ them.","PeriodicalId":55267,"journal":{"name":"Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa","volume":"202 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135679721","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: 1

Special Issues of Chemical and Process Engineering In Memory of Professor Jerzy Bałdyga 纪念Jerzy教授的化学与过程工程特刊Bałdyga

4区工程技术

Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa Pub Date : 2023-11-06 DOI: 10.24425/cpe.2021.137340

引用次数: 0

Modified bentonite-derived materials as catalysts for selective catalytic reduction of nitrogen oxides 改性膨润土衍生材料在氮氧化物选择性催化还原中的应用

4区工程技术

Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa Pub Date : 2023-11-06 DOI: 10.24425/cpe.2019.130220

引用次数: 6

Verification of models of gas bubble break-up caused by eddies generated by a self-aspirating disk impeller 自吸式圆盘叶轮产生涡流引起气泡破裂模型的验证

IF 0.6 4区工程技术

Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa Pub Date : 2023-11-06 DOI: 10.24425/CPE.2019.130222

J. Stelmach, Radosław Musowski

引用次数: 0

Selective catalytic reduction of NO with ammoniaat low temperature over Cu-promotedand N-modified activated carbon cu促进和n修饰活性炭上氨态低温选择性催化还原NO

IF 0.6 4区工程技术

Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa Pub Date : 2023-11-06 DOI: 10.24425/CPE.2019.130223

Marwa Saad, A. Białas, Przemysław Grzywacz, C. Czosnek, Bogdan Samojeden, M. Motak

引用次数: 2