Chinese Journal of Chemical Engineering最新文献

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Stable immobilization of acidic cesium phosphomolybdate on hollow silica microsphere for liquid-phase Friedel-Crafts alkylation 酸性磷钼酸铯在空心硅微球上的稳定固定化液相Friedel-Crafts烷基化
IF 3.5 3区 工程技术
Chinese Journal of Chemical Engineering Pub Date : 2026-09-01 Epub Date: 2026-08-13 DOI: 10.1016/j.cjche.2026.08.001
Tingting Wang, Qiangmin Gu, Jiahui Xie, Ying Wang, Heng Zhang, Wancheng Zhu
{"title":"Stable immobilization of acidic cesium phosphomolybdate on hollow silica microsphere for liquid-phase Friedel-Crafts alkylation","authors":"Tingting Wang,&nbsp;Qiangmin Gu,&nbsp;Jiahui Xie,&nbsp;Ying Wang,&nbsp;Heng Zhang,&nbsp;Wancheng Zhu","doi":"10.1016/j.cjche.2026.08.001","DOIUrl":"10.1016/j.cjche.2026.08.001","url":null,"abstract":"<div><div>This study was designed to achieve the <em>in-situ</em> synthesis of acidic cesium phosphomolybdate on hollow silica microspheres (HSM). A series of Cs<sub>x</sub>PMo/HSM catalysts with varying Cs contents (x = 0-0.8) were prepared, and their structure and acidity were characterized by TEM, XRD, N<sub>2</sub> physisorption, NH<sub>3</sub>-TPD, and DRIFTS. It was found that the successful formation and uniform dispersion of the Keggin-type acidic cesium phosphomolybdate within the HSM shell are highly dependent on the preparation sequence. The Cs<sub>0.4</sub>PMo/HSM catalyst exhibited the highest concentration and strength of strong acid sites, predominantly Brønsted acidity. In the liquid-phase alkylation of toluene with benzyl alcohol, Cs<sub>0.4</sub>PMo/HSM showed superior catalytic activity and exceptional stability, with no leaching of active components. Furthermore, the deactivated catalyst could be fully regenerated by simple calcination at 350 °C, which removed the adsorbed organic species, and it maintained high activity over six reaction cycles. The results confirmed that the synthetic pathway is critically important for fabricating supported heteropolyacid catalysts with optimal stability and acidity for liquid-phase applications.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"97 ","pages":"Pages 69-79"},"PeriodicalIF":3.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148938440","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
Solid digestate-derived biochar: Characterisation and polycyclic aromatic hydrocarbon removal efficiency 固体消化物衍生的生物炭:表征和多环芳烃去除效率
IF 3.5 3区 工程技术
Chinese Journal of Chemical Engineering Pub Date : 2026-09-01 Epub Date: 2026-08-13 DOI: 10.1016/j.cjche.2026.08.003
Amirah Syafika Mohd Nasir, Xiaotao Bi, Loretta Li, Qiao Xiong
{"title":"Solid digestate-derived biochar: Characterisation and polycyclic aromatic hydrocarbon removal efficiency","authors":"Amirah Syafika Mohd Nasir,&nbsp;Xiaotao Bi,&nbsp;Loretta Li,&nbsp;Qiao Xiong","doi":"10.1016/j.cjche.2026.08.003","DOIUrl":"10.1016/j.cjche.2026.08.003","url":null,"abstract":"<div><div>The integration of pyrolysis following anaerobic digestion presents advantages in waste-to-resource conversion and maximises energy recovery by transforming solid digestate into valuable products such as biochar. This study provides a comparative analysis of the composition of primary solid digestate (PSD) and secondary solid digestate (SSD) from an on-farm anaerobic digester treating animal manure, assessing the effectiveness of the resulting biochar as an adsorbent for the removal of polycyclic aromatic hydrocarbons. PSD and SSD were characterised by high lignin contents of 39.33% and 42.7% (mass), respectively, with the primary difference being the higher ash content in SSD compared to PSD. Results indicated that PSD biochar (PSD-B500) exhibited superior quality, with a higher specific surface area (249 m<sup>2</sup>·g<sup>−1</sup>), micropore volume (0.106 cm<sup>3</sup>·g<sup>−1</sup>), and a greater concentration of acidic functional groups (6.64 mmol·g<sup>−1</sup>) compared to SSD biochar (SSD-B500) (31.9 m<sup>2</sup>·g<sup>−1</sup>, 0.0019 cm<sup>3</sup>·g<sup>−1</sup>, and 5.39 mmol·g<sup>−1</sup>, respectively). According to the Langmuir isotherm model, the adsorption capacities of phenanthrene, anthracene, fluoranthene, and pyrene on PSD-B500 were 86%, 411%, 900%, and 83% higher than on SSD-B500, respectively. Overall, using PSD in the pyrolysis process produced high-quality biochar with superior surface area and functional group availability compared with SSD.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"97 ","pages":"Pages 295-305"},"PeriodicalIF":3.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148948056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Melamine foam-supported ionic liquid catalyst for inulin hydrolysis in micropacked bed reactors 微填充床反应器中三聚氰胺泡沫负载离子液体催化菊粉水解
IF 3.5 3区 工程技术
Chinese Journal of Chemical Engineering Pub Date : 2026-09-01 Epub Date: 2026-06-08 DOI: 10.1016/j.cjche.2026.04.018
Hao-Ran Cui, Meng Wen, Le Sang, Shi-Chao Su, Fan-Chen Zhang, Chen-Zhe Dai, Zhi-Ping Zhao
{"title":"Melamine foam-supported ionic liquid catalyst for inulin hydrolysis in micropacked bed reactors","authors":"Hao-Ran Cui,&nbsp;Meng Wen,&nbsp;Le Sang,&nbsp;Shi-Chao Su,&nbsp;Fan-Chen Zhang,&nbsp;Chen-Zhe Dai,&nbsp;Zhi-Ping Zhao","doi":"10.1016/j.cjche.2026.04.018","DOIUrl":"10.1016/j.cjche.2026.04.018","url":null,"abstract":"<div><div>Shrinking fossil fuel reserves and worsening environmental deterioration have spurred exploration on biomass resources. Inulin is an ideal feedstock owing to its ready availability and lack of complex pretreatment. To overcome cumbersome recovery, severe leaching, and low efficiency in batch reactors associated with conventional homogeneous ionic liquid catalysts, sulfonated polysulfone-based ionic liquids (SPSF-ILs) were innovatively immobilized on melamine foam (MF) via impregnation and non-solvent induced phase separation (NIPS) method to fabricate the heterogeneous SPSF-ILs/MF catalyst. The synergistic effect between quaternary ammonium triethylamine sulfonate cations and sulfonated polysulfone anions significantly enhances inulin hydrolysis performance. 99.94% total reducing sugar (TRS) yield was achieved at 90 °C for 150 min in batch reactors. Notably, in micropacked bed reactors (μPBRs), TRS yield of 99.68% was achieved at 90 °C within a 2.0 min residence time, corresponding to a space-time yield (STY) of 6.20 × 10<sup>−2</sup> g·ml<sup>−1</sup>·min<sup>−1</sup>·g<sub>cat</sub><sup>−1</sup>, over 8 times higher than that of the batch reactor. The catalyst exhibited excellent stability, with activity decay of less than 3% after continuous operation for 14 h in μPBRs.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"97 ","pages":"Pages 12-23"},"PeriodicalIF":3.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148859052","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
Biomanufacturing of triterpenoids: Systems engineering from plant extraction to microbial cell factories 三萜的生物制造:从植物提取到微生物细胞工厂的系统工程
IF 3.5 3区 工程技术
Chinese Journal of Chemical Engineering Pub Date : 2026-09-01 Epub Date: 2026-07-28 DOI: 10.1016/j.cjche.2026.07.004
Zihan Zhang, Rui Cao, Jiachen Sun, Linhao Chen, Lin Xiang, Ziqi Shen, Bo Lv, Lei Qin, Chun Li
{"title":"Biomanufacturing of triterpenoids: Systems engineering from plant extraction to microbial cell factories","authors":"Zihan Zhang,&nbsp;Rui Cao,&nbsp;Jiachen Sun,&nbsp;Linhao Chen,&nbsp;Lin Xiang,&nbsp;Ziqi Shen,&nbsp;Bo Lv,&nbsp;Lei Qin,&nbsp;Chun Li","doi":"10.1016/j.cjche.2026.07.004","DOIUrl":"10.1016/j.cjche.2026.07.004","url":null,"abstract":"<div><div>Triterpenoids are a class of natural secondary metabolites assembled from six isoprene units, characterized by diverse skeletons and complex structures. Renowned for their significant pharmacological activities (including anti-tumor, antiviral, immunomodulatory, and cardiovascular protective effects), triterpenoids hold substantial application value in drug discovery, functional foods, and cosmetics. Extracting these substances from plants has remained the primary manufacturing approach for a considerable period. However, this traditional approach is severely constrained by long plant growth cycles, seasonal and geographical limitations of germplasm resources, and the typically low abundance of active ingredients in plant tissues, especially the rare plant natural products. Accordingly, developing green, efficient, and sustainable alternatives for triterpene biosynthesis has become an urgent priority. Progress in synthetic biology, coupled with developments in metabolic engineering, has facilitated the <em>de novo</em> biosynthesis of triterpenoids within engineered microorganisms, driving a paradigm shift from nature-dependent plant extraction to precision synthetic bio-manufacturing. This review systematically summarizes the structure-activity relationships of triterpenoids, traces the iteration trajectory of production methods from traditional extraction to <em>de novo</em> biosynthesis, and examines the key challenges and systems engineering strategies involved in constructing microbial cell factories, including enzyme engineering and metabolic engineering. Finally, it offers a forward-looking perspective on the future of triterpenoid synthesis empowered by artificial intelligence, aiming to offer theoretical and technical support for green triterpenoid biosynthesis.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"97 ","pages":"Pages 204-214"},"PeriodicalIF":3.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148948096","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
Design and optimization of poly(arylene piperidinium) membranes for water electrolysis 水电解用聚芳基胡椒啶膜的设计与优化
IF 3.5 3区 工程技术
Chinese Journal of Chemical Engineering Pub Date : 2026-09-01 Epub Date: 2026-08-17 DOI: 10.1016/j.cjche.2026.08.004
Xinchi Ma, Junkai Fang, Siyu Chen, Shuo Yang, Zhengjin Yang, Tongwen Xu
{"title":"Design and optimization of poly(arylene piperidinium) membranes for water electrolysis","authors":"Xinchi Ma,&nbsp;Junkai Fang,&nbsp;Siyu Chen,&nbsp;Shuo Yang,&nbsp;Zhengjin Yang,&nbsp;Tongwen Xu","doi":"10.1016/j.cjche.2026.08.004","DOIUrl":"10.1016/j.cjche.2026.08.004","url":null,"abstract":"<div><div>Anion exchange membrane water electrolysis (AEMWE) is a critical technical route for producing green hydrogen. As a crucial component of AEMWE, the anion exchange membrane plays a decisive role in the electrolysis process. Among them, the poly(arylene piperidinium) (PAP) membranes demonstrate excellent ion conductivity and alkali stability, meet the requirements of AEMWE, and have received extensive attention over the past several years. This review provides a brief introduction to the PAP membranes, summarizes recent relevant modifications to adapt to the requirements of water electrolyzers, and analyzes the reasons and underlying mechanisms for making such improvements. Finally, it provides a comprehensive summary of the performance metrics of PAP membranes in AEMWE, identifies current problems, and outlines future improvement directions for PAP membranes.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"97 ","pages":"Pages 306-320"},"PeriodicalIF":3.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148996961","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
Unraveling the decomposition behavior of hydroxylamine nitrate on Ir(1 1 1): Microkinetic modeling with coverage effects 揭示硝酸羟胺在Ir上的分解行为:覆盖效应的微动力学模型
IF 3.5 3区 工程技术
Chinese Journal of Chemical Engineering Pub Date : 2026-08-01 Epub Date: 2026-05-15 DOI: 10.1016/j.cjche.2026.04.003
Fengjing Xie, Jilin Xu, Jinying Tu, Zihao Yao, Xing Zhong, Jianfa Chen, Shengwei Deng, Huikun Zhang, Chengli Mao, Jianguo Wang
{"title":"Unraveling the decomposition behavior of hydroxylamine nitrate on Ir(1 1 1): Microkinetic modeling with coverage effects","authors":"Fengjing Xie,&nbsp;Jilin Xu,&nbsp;Jinying Tu,&nbsp;Zihao Yao,&nbsp;Xing Zhong,&nbsp;Jianfa Chen,&nbsp;Shengwei Deng,&nbsp;Huikun Zhang,&nbsp;Chengli Mao,&nbsp;Jianguo Wang","doi":"10.1016/j.cjche.2026.04.003","DOIUrl":"10.1016/j.cjche.2026.04.003","url":null,"abstract":"<div><div>Hydroxylamine nitrate (HAN) is considered a promising alternative to traditional hydrazine-based propellants because of its high density, low volatility, and environmentally friendly characteristics. However, the mechanism of its catalytic decomposition remains unclear, and existing theoretical models often neglect the coverage effect on the catalyst surface. This severely limits the theoretical design and experimental development of highly efficient universal catalysts. Therefore, this study employs density functional theory (DFT) to establish a coverage-dependent microkinetic modeling incorporating adsorbate-adsorbate lateral interactions, systematically revealing the decomposition mechanism of HAN on Ir(1 1 1) surfaces. Results show that coverage effects regulate the distribution of surface active sites, with increasing temperature significantly raising the proportion of free sites and thereby enhancing the overall reaction rate. Lateral interactions reinforce the kinetic advantage of NO formation pathway, maintaining its selectivity stable at approximately 50% over the temperature range of 393.15–593.15 K while suppressing side reactions at elevated temperatures. Degree of rate control (DRC) analysis further indicates that the reactions H<sub>2</sub>NO∗ + NO<sub>2</sub>∗ <span><math><mrow><mo>⇌</mo></mrow></math></span> HONO∗ + HNO∗ and HONO∗ + ∗ <span><math><mrow><mo>⇌</mo></mrow></math></span> NO∗ + OH∗ are the key kinetic control steps for NO production. Reducing their energy barriers will increase the yield of NO. This work provides a theoretical basis for accurately describing real catalytic surface reactions and designing highly selective catalysts.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"96 ","pages":"Pages 120-129"},"PeriodicalIF":3.5,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148646488","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
Ultrahigh cobalt-loading composite electrode material for wearable supercapacitors 可穿戴超级电容器用超高钴负载复合电极材料
IF 3.5 3区 工程技术
Chinese Journal of Chemical Engineering Pub Date : 2026-08-01 Epub Date: 2026-05-30 DOI: 10.1016/j.cjche.2026.04.014
Kangqi Chang, Wenke Tan, Ziyu Liu, Hebin Zhang, Zhijun Cao
{"title":"Ultrahigh cobalt-loading composite electrode material for wearable supercapacitors","authors":"Kangqi Chang,&nbsp;Wenke Tan,&nbsp;Ziyu Liu,&nbsp;Hebin Zhang,&nbsp;Zhijun Cao","doi":"10.1016/j.cjche.2026.04.014","DOIUrl":"10.1016/j.cjche.2026.04.014","url":null,"abstract":"<div><div>Cobalt nanocomposites have garnered significant attention for high-performance supercapacitors due to their high redox activity, multi-electron transfer capability, and wide operating voltage window. However, their practical application remains hindered by limited nanoparticle loading and poor cycling stability. This study reports the synthesis of a metal ionic liquid-mediated carbon composite with ultrahigh loading of cobalt nanoparticles (denoted as H-Co-CF) and its application as a supercapacitor electrode material. The optimized nanoparticle-rich nanofiber composite membrane structure enhances electronic conductivity, expands the voltage window to 1.8 V, and ensures operational stability. The H-Co-CF electrode demonstrates a high specific capacitance of 759.3 F·g<sup>−1</sup> at a current density of 1 A·g<sup>−1</sup>, along with an outstanding rate capability of 303.7 F·g<sup>−1</sup> even at 50 A·g<sup>−1</sup>. A symmetric supercapacitor fabricated using H-Co-CF achieves remarkable performance metrics: a specific capacitance of 751.9 F·g<sup>−1</sup> at 1 A·g<sup>−1</sup>, which retains 300.8 F·g<sup>−1</sup> at 50 A·g<sup>−1</sup>, and delivers an energy density of 169.2 Wh·kg<sup>−1</sup> at a power density of 900 W·kg<sup>−1</sup>. These advancements originate from the synergistic effect between the uniquely structured fibrous membrane and the high-loading cobalt nanoparticles, positioning H-Co-CF as a promising transformative material for next-generation wearable energy storage devices.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"96 ","pages":"Pages 87-96"},"PeriodicalIF":3.5,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148646492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A tri-enzymatic cascade for spermidine production using a cofactor-preference-engineered carboxyspermidine dehydrogenase 使用辅助因子优选工程羧基亚精胺脱氢酶生产亚精胺的三酶级联
IF 3.5 3区 工程技术
Chinese Journal of Chemical Engineering Pub Date : 2026-08-01 Epub Date: 2026-06-02 DOI: 10.1016/j.cjche.2026.05.002
Quan Qi, Qi Chu, Chaoqiang Wu, Alei Zhang, Feifei Chen, Kequan Chen
{"title":"A tri-enzymatic cascade for spermidine production using a cofactor-preference-engineered carboxyspermidine dehydrogenase","authors":"Quan Qi,&nbsp;Qi Chu,&nbsp;Chaoqiang Wu,&nbsp;Alei Zhang,&nbsp;Feifei Chen,&nbsp;Kequan Chen","doi":"10.1016/j.cjche.2026.05.002","DOIUrl":"10.1016/j.cjche.2026.05.002","url":null,"abstract":"<div><div>Spermidine, a key polyamine widely distributed in bacteria, plants and animals, exerts significant physiological functions and serves as a precursor for the synthesis of various bioactive compounds. Herein, we report the construction of a tri-enzymatic cascade for spermidine production, comprising a homoserine dehydrogenase (HSD), a carboxyspermidine dehydrogenase (CASDH), and a carboxyspermidine decarboxylase (CASDC). In the biocatalytic system, an internal redox-neutral NADH regeneration module was established by coupling an NAD<sup>+</sup>-dependent homoserine dehydrogenase from <em>Arthrobacter nicotinovorans</em> (<em>An</em>HSD) with a newly identified carboxyspermidine dehydrogenase from <em>Ventosimonas gracilis</em> (<em>Vgra</em>CASDH). To enhance the efficiency of the NADH regeneration, <em>Vgra</em>CASDH was further engineered <em>via</em> a semi-rational strategy, yielding a double-site mutant (M2) with altered cofactor preference from NADPH to NADH, an increased catalytic efficiency (<em>k</em><sub>cat</sub>·<em>K</em><sub>m</sub><sup>−1</sup>), and a prolonged half-life exceeding 8 h. Using the tri-enzymatic cascade with the engineered <em>Vgra</em>CASDH, efficient synthesis of spermidine was achieved with a titer of 4.3 g·L<sup>−1</sup>, representing a 2.7-fold improvement over the system harboring the wild-type enzyme.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"96 ","pages":"Pages 76-86"},"PeriodicalIF":3.5,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148646493","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 investigation on the flow and heat transfer characteristics of non-Newtonian viscoelastic fluids in stirred reactors 搅拌反应器中非牛顿粘弹性流体流动与传热特性的数值研究
IF 3.5 3区 工程技术
Chinese Journal of Chemical Engineering Pub Date : 2026-08-01 Epub Date: 2026-04-16 DOI: 10.1016/j.cjche.2026.03.017
Jingyi Wang, Zilu Liu, Fahu Yang, Wenjun Yuan, Dong Liu, Dongjie Liu, Fei Chen
{"title":"Numerical investigation on the flow and heat transfer characteristics of non-Newtonian viscoelastic fluids in stirred reactors","authors":"Jingyi Wang,&nbsp;Zilu Liu,&nbsp;Fahu Yang,&nbsp;Wenjun Yuan,&nbsp;Dong Liu,&nbsp;Dongjie Liu,&nbsp;Fei Chen","doi":"10.1016/j.cjche.2026.03.017","DOIUrl":"10.1016/j.cjche.2026.03.017","url":null,"abstract":"<div><div>Compared to Newtonian fluids, the flow and heat transfer behavior of non-Newtonian viscoelastic polymer solutions are more complex. In this study, a numerical investigation is carried out to analyze the flow dynamics and heat transfer characteristics of viscoelastic fluids in a stirred reactor. The Phan-Thien–Tanner viscoelastic constitutive model is employed to accurately capture the complex rheology of polymer solutions. This study focuses on exploring the potential influence of the inertial Reynolds number (<em>Re</em>, denoted by impeller rotational speed <em>N</em>) and fluid elasticity (denoted by relaxation time <em>λ</em>) on enhancing flow mixing and heat transfer. Results indicate that heat transfer performance improves with increasing rotational speed and relaxation time. Under sufficient inertia, increased elasticity leads to greater deformation of long-chain polymer molecules, triggering elastic instability phenomena. At the critical relaxation time of <em>λ</em> = 0.1, two distinct flow regimes are observed. Increased elasticity triggers elastic turbulence, which effectively enhances fluid mixing and convective heat transfer within the reactor. Under highly elastic conditions (<em>λ</em> &gt; 0.1 s), the Nusselt number (<em>Nu</em>) exhibits non-monotonic temporal behavior. Dimensionless analysis further demonstrates that viscoelastic fluids achieve superior heat-transfer efficiency relative to Newtonian fluids, with <em>Nu</em> enhanced by 7.16% and 22.58% at <em>Re</em> = 405 and <em>Re</em> = 675, respectively, under highly elastic conditions. Furthermore, the optimized frame-type combined impeller exhibits excellent performance in the flow and heat transfer processes of viscoelastic fluids. The present work is conducive to the development and optimization of high-efficiency heat transfer reactors for polymerization processes.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"96 ","pages":"Pages 180-194"},"PeriodicalIF":3.5,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148742872","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
A review of amine degradation and solvent reclaiming in post-combustion carbon capture 燃烧后碳捕集中胺类降解和溶剂回收的研究进展
IF 3.5 3区 工程技术
Chinese Journal of Chemical Engineering Pub Date : 2026-08-01 Epub Date: 2026-06-19 DOI: 10.1016/j.cjche.2026.06.004
Haizhou Lin, Qi Liu, Zheng Yang, Dawei Wu, Zhangwei Sun, Weike Li, Yongchun Fan, Hongxia Gao, Min Xiao, Zhiwu Liang
{"title":"A review of amine degradation and solvent reclaiming in post-combustion carbon capture","authors":"Haizhou Lin,&nbsp;Qi Liu,&nbsp;Zheng Yang,&nbsp;Dawei Wu,&nbsp;Zhangwei Sun,&nbsp;Weike Li,&nbsp;Yongchun Fan,&nbsp;Hongxia Gao,&nbsp;Min Xiao,&nbsp;Zhiwu Liang","doi":"10.1016/j.cjche.2026.06.004","DOIUrl":"10.1016/j.cjche.2026.06.004","url":null,"abstract":"<div><div>Carbon dioxide (CO<sub>2</sub>) capture, storage, and utilization (CCUS) is one of the major technologies for achieving clean utilization of fossil fuels, with amine-based chemical absorption being the most feasible CO<sub>2</sub> capture technology. However, amine solvents suffer from thermal and oxidative degradation during long-time operation, which is a key bottleneck restricting large-scale application. This review summarizes the degradation mechanisms, products, influencing factors, and degradation inhibitors of single, blended, and biphasic amine solvents. In addition, it also discusses amine reclaiming technologies, including distillation, ion exchange, and electrodialysis, as well as emerging methods like adsorption and nanofiltration. This work aims to provide a comprehensive overview of amine degradation and solvent reclaiming research, offering insights for optimizing solvent performance and promoting the industrialization of amine-based CO<sub>2</sub> capture technology.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"96 ","pages":"Pages 279-298"},"PeriodicalIF":3.5,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148742874","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
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