Chinese Journal of Chemical Engineering最新文献

{"title":"Stability investigation and techno-economic assessment of gliding arc plasma coupled electrocatalytic ammonia synthesis system","authors":"Yang Lv,&nbsp;Gaoyang Li,&nbsp;Jianpeng Sun,&nbsp;Honghui Ou,&nbsp;Yang Li,&nbsp;Guidong Yang","doi":"10.1016/j.cjche.2025.04.014","DOIUrl":"10.1016/j.cjche.2025.04.014","url":null,"abstract":"<div><div>The plasma-coupled electrocatalytic cascade technology with <span><math><mrow><mi>N</mi><msubsup><mi>O</mi><mi>x</mi><mo>−</mo></msubsup></mrow></math></span> as intermediate product is a potential method to realize green ammonia synthesis. The matching of the formation rate and consumption rate of <span><math><mrow><mi>N</mi><msubsup><mi>O</mi><mi>2</mi><mo>−</mo></msubsup></mrow></math></span> as the main absorption product is an important prerequisite for the system to achieve stable operation. Therefore, this paper firstly emphasizes the importance of operating parameters on the cascade system based on the single factor experiment. Secondly, the empirical equation between electrocatalytic operating conditions and <span><math><mrow><mi>N</mi><msubsup><mi>O</mi><mi>2</mi><mo>−</mo></msubsup></mrow></math></span> consumption rate was established by response surface analysis. Based on this equation, the electrocatalytic operating parameters were optimized to achieve the dynamic equilibrium between <span><math><mrow><mi>N</mi><msubsup><mi>O</mi><mi>2</mi><mo>−</mo></msubsup></mrow></math></span> formation rate and consumption rate. Finally, the techno-economic assessment model was established to calculate the levelized cost of ammonia based on the cascade system, and the single-variable sensitivity analysis was performed to provide the clear guidance for cost reduction.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 251-259"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097194","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}

{"title":"Occurrence, characteristics and removal of microplastics in wastewater treatment plants with different treatment processes","authors":"Yiting Lian ,&nbsp;Xianwei Wang ,&nbsp;Peng Sun ,&nbsp;Hua Wang ,&nbsp;Chengran Fang","doi":"10.1016/j.cjche.2025.04.016","DOIUrl":"10.1016/j.cjche.2025.04.016","url":null,"abstract":"<div><div>The abundance of microplastics (MPs) in wastewater from three wastewater treatment plants (WWTPs) were determined in Hangzhou, Zhejiang Province, China. The MPs abundance was 140–350 particles per litre in the influent and 10–30 particles per litre in the effluent. Four shapes of MPs in the influent were observed, while mainly only debris was left in the effluent. The percentage of small (≤100 μm), medium (100–500 μm), and large-sized (≥500 μm) plastics in the raw leachate of the three WWTPs were 54.3%, 8.6%, and 37.1%, 28.6%, 64.3%, and 7.1%, and 41.4%, 24.1%, and 34.5%, respectively. Mainly only the size of ≤100 μm was left in the effluent of all. The removal efficiencies of MPs in a range of 78.6% to 96.6% were achieved. Polypropylene, polystyrene, polyethylene, polyethylene terephthalate and polyvinyl chloride were the main types and detected in all wastewater samples, accounting for over 75% of all types. The plastic components contained in different industrial wastewater were more complex. The distribution of MPs was significantly positively correlated with most conventional indicators such as chemical oxygen demead, ammonia nitrogen, and total phosphorus, but not with heavy metals. Similar wastewater, different treatment processes, or similar processes but different wastewater (industrial wastewater proportion varied) could all lead to differences in MPs removal. The MPs abundance measured in this experiment was similar to some previous studies, but relatively high. The three WWTPs can discharge up to 6.0 × 10⁸–1.8 × 10⁹ plastics of MPs per day, which poses potential ecological risks. This study indicates that the source control of MPs and optimizing the process design of existing WWTPs are crucial for preventing and controlling MPs pollution.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 316-326"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156511","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}

{"title":"DFT study on thermodynamic properties of liquid mixtures containing cyclohexanol with aniline and chloro-substituted anilines","authors":"E A Lohith ,&nbsp;S. Ravikumar ,&nbsp;K. Keerthi ,&nbsp;S. Ponnusamy ,&nbsp;Sada Venkateswarlu ,&nbsp;K. Siva Kumar ,&nbsp;N.V.V. Jyothi","doi":"10.1016/j.cjche.2025.02.035","DOIUrl":"10.1016/j.cjche.2025.02.035","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Density (&lt;em&gt;ρ&lt;/em&gt;) and speed of sound (&lt;em&gt;u&lt;/em&gt;) findings on the binary liquid mixtures consisting of cyclohexanol (CH—OH), with aniline (A), &lt;em&gt;ortho&lt;/em&gt;-chloroaniline (&lt;em&gt;o&lt;/em&gt;-CA), and &lt;em&gt;meta&lt;/em&gt;-chloroaniline (&lt;em&gt;m&lt;/em&gt;-CA) were gathered at the various temperatures spanning the entire concentration range. 303.15, 308.15,313.15 and 318.15 K at atmospheric pressure. The information measured there was utilized to compute excess molar volume (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;mi&gt;m&lt;/mi&gt;&lt;mi&gt;E&lt;/mi&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;), excess isentropic compressibility (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mi&gt;K&lt;/mi&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mi&gt;E&lt;/mi&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;), excess of speed of sound (&lt;em&gt;u&lt;/em&gt;&lt;sup&gt;E&lt;/sup&gt;), excess intermolecular free length (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mi&gt;L&lt;/mi&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;mi&gt;E&lt;/mi&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;) and excess acoustic impedance (&lt;em&gt;Z&lt;/em&gt;&lt;sup&gt;E&lt;/sup&gt;). Further, the partial molar volumes (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mover&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mrow&gt;&lt;mi&gt;m&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;∘&lt;/mo&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;. &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mover&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mrow&gt;&lt;mi&gt;ϕ&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;∘&lt;/mo&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;. &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mover&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mrow&gt;&lt;mi&gt;m&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;∘&lt;/mo&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;. &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mover&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mrow&gt;&lt;mi&gt;ϕ&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;∘&lt;/mo&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;), partial molar compressibilities (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mi&gt;K&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;m&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;∘&lt;/mo&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mover&gt;&lt;mi&gt;K&lt;/mi&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mrow&gt;&lt;mi&gt;ϕ&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;∘&lt;/mo&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mover&gt;&lt;mi&gt;K&lt;/mi&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mrow&gt;&lt;mi&gt;m&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;∘&lt;/mo&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mover&gt;&lt;mi&gt;K&lt;/mi&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mrow&gt;&lt;mi&gt;ϕ&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;∘&lt;/mo&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;) and their excess values (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mover&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mrow&gt;&lt;mi&gt;m&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mi&gt;E&lt;/mi&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;. &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mover&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mrow&gt;&lt;mi&gt;ϕ&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;°&lt;/mo&gt;&lt;mi&gt;E&lt;/mi&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;. &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mover&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mrow&gt;&lt;mi&gt;m&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;mi&gt;E&lt;/mi&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;. &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mover&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mrow&gt;&lt;mi&gt;ϕ&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;°&lt;/mo&gt;&lt;mi&gt;E&lt;/mi&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;), (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mover&gt;&lt;mi&gt;K&lt;/mi&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mrow&gt;&lt;mi&gt;m&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mi&gt;E&lt;/mi&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mover&gt;&lt;mi&gt;K&lt;","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 378-392"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156526","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}

{"title":"Consequence prediction using variable-length concentration time series for gas turbine enclosure","authors":"Shikuan Chen,&nbsp;Wenli Du,&nbsp;Chenxi Cao,&nbsp;Bing Wang","doi":"10.1016/j.cjche.2025.04.013","DOIUrl":"10.1016/j.cjche.2025.04.013","url":null,"abstract":"<div><div>Flammable gas leakage in a semi-enclosed scenario can lead to catastrophic consequences, such as vapor cloud explosions. To reduce casualties and environmental damage, predicting the consequences based on the initial concentration time series monitored by sensors is of paramount importance. This paper proposes a consequence prediction model based on deep learning using variable-length concentration time series. Incomplete concentration values are padded and then passed through a masking layer, enabling the network to focus exclusively on valid data. The temporal correlations are extracted using a long short-term memory (LSTM) network, and the final prediction results are obtained by passing these features into a feedforward neural network (FNN). Computational fluid dynamics (CFD) software was used to simulate the leakage of hydrogen-mixed natural gas. Experiments were carried out for nine distinct prediction targets, derived from combinations of the mass and centroid coordinates of vapor clouds formed by various gases. These prediction targets were modeled using both fixed-length and variable-length input sequences. The high accuracy of the experimental results validates the effectiveness of the proposed method.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 182-188"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097712","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}

{"title":"Stretchable, anti-freezing and self-healing zwitterionic polyacrylate hydrogels for flexible wearable sensors","authors":"Zhengyuan Zhou ,&nbsp;Naibing Li ,&nbsp;Haoran Cao ,&nbsp;Xi Luo ,&nbsp;Yongnan Zhou ,&nbsp;Tianchi Zhou ,&nbsp;Lu Cai ,&nbsp;Jinli Qiao","doi":"10.1016/j.cjche.2025.06.002","DOIUrl":"10.1016/j.cjche.2025.06.002","url":null,"abstract":"<div><div>Traditional hydrogels are inevitably damaged during practical applications, resulting in a gradual deterioration of their functional efficacy. A primary strategy to address this issue involves developing hydrogels with inherent self-healing properties. In this study, we report the synthesis of self-healing polyacrylate hydrogels that integrate zwitterions, hydrophilic nano-silica and aluminum ions. Due to the synergistic effect of multiple hydrogen bonds, coordination bonds and electrostatic interactions, the tensile strength of the hydrogel is enhanced from 15.1 to 162.6 kPa. Moreover, the electrical resistance and tensile strength of the hydrogel can almost recover to its initial values after 20 min of healing at room temperature, exhibiting remarkable self-healing performance. Furthermore, the zwitterionic polyacrylate hydrogel serves as a wearable sensor with the capability of accurately response to the bending and stretching of human joints, exhibting a gauge factor of 1.87 under tensile strain ranging from 80% to 100%. Even after being freezed at −20 °C for 3 h, the zwitterionic polyacrylate hydrogel retains its exceptional writing performance. In conclusion, the hydrogels developed in this study demonstrate significant potential for wearable electronics applications.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 367-377"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156514","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}

{"title":"The effects of Cl− and Ca2+ on corrosion and scale formation of 3Cr steel in CO2 flooding produced fluid","authors":"Haifu Yuan ,&nbsp;Dezhi Zeng ,&nbsp;Jie Li ,&nbsp;Zhendong Liu ,&nbsp;Xi Wang ,&nbsp;Chengxiu Yu ,&nbsp;Yonggang Yi ,&nbsp;Baojun Dong","doi":"10.1016/j.cjche.2025.02.036","DOIUrl":"10.1016/j.cjche.2025.02.036","url":null,"abstract":"<div><div>To elucidate the effects of Cl⁻ and Ca²⁺ on the corrosion and scale formation of 3Cr steel in CO₂ flooding-produced fluid, corrosion weight loss experiments, and titration experiments were conducted. The resulting products were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). This study examined the corrosion and scaling behavior of 3Cr steel under the influence of Cl⁻ and Ca²⁺. The results indicate that both Cl⁻ and Ca²⁺ promote the corrosion of 3Cr steel. Notably, Cl⁻ diminishes the promoting effect of Ca²⁺ on corrosion and inhibits scaling, revealing a mutual enhancement between corrosion and scaling. The mechanisms of localized corrosion under varying concentrations of Cl⁻ and Ca²⁺ differ; under-scale corrosion occurs in environments with 5000 mg·L⁻¹ Cl⁻, while Cl⁻induced corrosion is observed in 20000 mg·L⁻¹ Cl⁻ environments. This study highlights that under the synergistic effects of Cl⁻, Ca²⁺, and scaling processes, the protective product film dissolves, thereby influencing both corrosion and scaling processes.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 355-366"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156528","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}

{"title":"Conformational changes of a complex of two oppositely charged polyelectrolytes on the surface of a polarized spherical metal nanoparticle","authors":"N.Yu. Kruchinin,&nbsp;M.G. Kucherenko","doi":"10.1016/j.cjche.2025.02.038","DOIUrl":"10.1016/j.cjche.2025.02.038","url":null,"abstract":"<div><div>Using molecular dynamics modeling, the change in the shape and density of the macromolecular corona consisting of two oppositely charged polyelectrolytes, including those combined into one block copolymer, on the surface of a polarized spherical metal nanoparticle was studied. A mathematical model of the structure of the block copolymer chain adsorbed on a polarized spherical nanoparticle is presented for the cases of polyelectrolyte blocks of large and small length. Based on the modeling results, radial and angular distributions of the density of atoms of polyelectrolyte polypeptides adsorbed on the surface of a spherical nanoparticle were calculated depending on its dipole moment. As the dipole moment of the nanoparticle increased, the dense macromolecular shell was destroyed, forming caps of polyelectrolyte macromolecules or fragments of block copolymer of different types on the poles of the polarized nanoparticle. In this case, the macromolecular corona in the region of the poles of the polarized nanoparticle swelled the more strongly, the greater the distance between the charged links in the polymer.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 25-37"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047912","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}

{"title":"Durable self-cleaning superhydrophobic composite coatings based on fluorine-modified organic polysilazane and SiO2 particles prepared by facile spraying technique","authors":"Mengyuan Peng ,&nbsp;Qi Wang ,&nbsp;Min Sha ,&nbsp;Biao Jiang ,&nbsp;Ding Zhang","doi":"10.1016/j.cjche.2025.03.021","DOIUrl":"10.1016/j.cjche.2025.03.021","url":null,"abstract":"<div><div>Superhydrophobicity endows various substrates with astonishing multifunctional properties and has received widespread praise in industrial production. However, the fragile connection between the coating and the substrate not only limits the service life of superhydrophobic coatings, but also poses limitations. To address this issue, this study used 3-(perfluorooctyl) propanol and organic polysilazane (OPSZ) with universal anchoring properties as starting materials to obtain fluorine modified OPSZ through a one-step synthesis method, and then doped SiO₂ micro nano particles to produce superhydrophobic coatings that can be widely applied to various substrates. Investigating the relationship between the hydrophobic properties of the coatings and the amounts of SiO₂ microparticles and nanoparticles used to create the microscopic rough structure of the superhydrophobic coatings, it was discovered that the hydrophobic properties of the coatings tended to increase as the number of nanoparticles increased. The water contact angle of prepared coatings was still over 157° after 48 h of UV exposure or 180 days of exposure to air. The heat resistance of the created superhydrophobic coatings was tested in a muffle furnace at 400 °C for 2 h. The results revealed that the coatings maintained their water contact angle of 155.1°±3.01° and water sliding angle of 6.4°±1.98°, demonstrating their excellent heat resistance and suitability for use in a variety of high-temperature environments. The work provided a practical way for creating superhydrophobic composite coatings with excellent mechanical stability, acid and alkali corrosion resistance, and heat resistance, and had potential application in antifouling and anti-corrosion.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 335-347"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156566","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}

{"title":"Research progress on the copper-based catalyst design for dimethyl oxalate hydrogenation to ethylene glycol","authors":"Hansheng Wang ,&nbsp;Xintian Luo ,&nbsp;Kaixuan Chen ,&nbsp;Benduan Xiao ,&nbsp;Xu Zhang ,&nbsp;Qingjun Meng ,&nbsp;Huibing He ,&nbsp;Jing Xu ,&nbsp;Yong Jin","doi":"10.1016/j.cjche.2025.05.017","DOIUrl":"10.1016/j.cjche.2025.05.017","url":null,"abstract":"<div><div>In this paper, the research progress of Cu-based catalyst and the activity enhancement strategies in the hydrogenation of dimethyl oxalate (DMO) to ethylene glycol (EG) was reviewed. As a green and economical ethylene glycol production path, the core of DMO hydrogenation of EG lies in the rational design and optimization of catalysts. This paper first introduces the background of the DMO hydrogenation system EG significance and the important effect of Cu-based catalyst in the reaction, particularly emphasizing the coordination with the Cu⁺−Cu⁰ species catalytic effect. Then, many factors affecting the activity of Cu-based catalysts were analyzed in detail, including the equilibrium effect between Cu⁰ and Cu⁺ species, the surface dispersion of Cu species, the interaction between metal and support, and the morphology effect of the catalyst. Regarding strategies for improving catalyst performance, this paper summarized effective measures such as optimizing support structure, adding promoters and optimizing preparation methods, and demonstrated the practical application effects of these strategies through representative catalyst examples. In addition, this paper also discusses the complex relationship between the influencing factors and catalyst performance. It points out the key directions for future research, with in-depth exploration of the correlation between catalyst structure and performance, the development of new catalysts, and the application of machine learning and big data technology in the catalyst research and development. In summary, this paper provides comprehensive theoretical guidance and practical reference for the performance optimization of Cu-based catalysts for DMO hydrogenation to EG.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 189-205"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097189","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}

{"title":"Enhanced fluid-flow-field and electric-field synergistic interaction mechanism for lithium-ion separation in dilute solutions: A numerical analysis of electrochemically switched ion exchange system","authors":"Kangjun Ji ,&nbsp;Jingxuan Yang ,&nbsp;Xuefeng Zhang ,&nbsp;Mengbo Zhao ,&nbsp;Xiao Du ,&nbsp;Xiaogang Hao ,&nbsp;Abuliti Abudula ,&nbsp;Guoqing Guan","doi":"10.1016/j.cjche.2025.04.004","DOIUrl":"10.1016/j.cjche.2025.04.004","url":null,"abstract":"<div><div>Electrochemically switched ion exchange (ESIX) is an effective technology for extracting high-value-added ions from dilute solutions. This study focuses on Li⁺ extraction by employing a comprehensive model to analyze interaction between fluidic dynamics, electric field and ion transport. The model combines Butler–Volmer equation modified by electroactive site concentration, Nernst–Planck equation and Navier–Stokes equation. It is found that the chamber width affects solution phase resistance, thereby altering the potential distribution and influencing the current distribution within the membrane. A narrow chamber increases current density in the solid phase of the membrane, enhancing Li⁺ extraction. The solution flow-field not only enhances convective transport but also increases the current density in the solid phase, promoting Li⁺ extraction. There is a synergistic effect between fluid-flow-field and electric-field for ion separation, which is only significant when the chamber width is greater than 2 mm. The synergistic mechanism differs from that in the capacitive deionization system. Therefore, the performance decline caused by a wide chamber can be compensated for by increasing the fluid-flow rate, utilizing the synergistic effect between the fluid-flow-field and electric-field to optimize the lithium extraction efficiency in the ESIX system.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 228-237"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097192","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}