Chinese Journal of Chemical Engineering最新文献

{"title":"Synthesis of polymeric Janus nanoparticles by co-precipitation in a rotating packed bed to stabilize carvacrol encapsulated Pickering emulsions","authors":"Senlin Li ,&nbsp;Yifan Zheng ,&nbsp;Fen Wang ,&nbsp;Xiang Wang ,&nbsp;Zhihao Zhang ,&nbsp;Yuan Pu ,&nbsp;Dan Wang","doi":"10.1016/j.cjche.2025.04.017","DOIUrl":"10.1016/j.cjche.2025.04.017","url":null,"abstract":"<div><div>Practical application of carvacrol in different fields including foods and biopesticides has been limited due to its instability and water insolubility. In this work, carvacrol encapsulated Pickering emulsion is developed by using polymeric Janus nanoparticles as the stabilizer. To achieve this, dumbbell-shaped polymeric nanoparticles composed of two spheres of shellac and polylactic acid (PLA) are firstly prepared <em>via</em> co-precipitation in a rotating packed bed reactor, followed by grafting of chitooligosaccharides (COS) onto shellac to synthesis amphiphilic Janus nanoparticles (PLA/shellac-COS). Pickering emulsions with typical oil-in-water, bi-continuous structure and water-in-oil characteristics are produced by configuring carvacrol emulsions with different oil-to-water ratios. The stability of emulsions with 5% carvacrol content stabilized by 0.5% PLA/shellac-COS nanoparticles were more stable when compared to those prepared by shellac nanoparticles and PLA/shellac nanoparticles. After stored for one month, the carvacrol encapsulated Pickering emulsions maintained a high zeta potential of −43.8 mV, with no significant changes in particle size. These preliminary studies illustrated that polymeric Janus nanoparticles synthesized by co-precipitation in a rotating packed bed are promising particles for Pickering emulsions and related work in the future.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 7-15"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047910","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":"Characterization of gaseous products and activated chars from pyrolysis of sewage sludge in the presence of activating agent","authors":"Yuwen Zhu,&nbsp;Jian Liu,&nbsp;Ting Li,&nbsp;Xinrui Su,&nbsp;Qian Dai,&nbsp;Chang Xu,&nbsp;Xuening Zhao,&nbsp;Hanqiao Liu","doi":"10.1016/j.cjche.2025.04.008","DOIUrl":"10.1016/j.cjche.2025.04.008","url":null,"abstract":"<div><div>Sewage sludge (SS) and SS impregnated with activating agents (ZnCl₂ and KOH) were pyrolyzed in a fixed-bed reactor to produce gaseous fuel and activated char. The effects of heating rate, pyrolysis temperature and activator type on gas yields, pore structure and adsorption properties of activated char were systematically studied. The results demonstrated that increasing the pyrolysis temperature from 450 °C to 850 °C proportionally enhanced H₂ and CO yields from the rapid pyrolysis of SS, while CH₄ yield showed minimal variation between 650 °C and 850 °C. ZnCl₂ notably increased the CO yield, reaching 71.9 ml·g⁻¹ at 850 °C, but caused a marked reduction in CH₄ yield under the tested conditions. Similarly, KOH promoted CO yield at 750 °C and 850 °C, with minimal impact on CH₄ production. Both activators facilitated higher H₂ yields in the range of 450–550 °C, while the maximum H₂ yield (109.8 ml·g⁻¹) was observed at 850 °C in the absence of activator. The activated char derived from ZnCl₂-assisted pyrolysis exhibited well-developed micro- and mesopore structures, with specific surface areas ranging from 188.2 to 54.1 m²·g⁻¹ across pyrolysis temperatures of 450–850 °C. When evaluated as adsorbents for methylene blue removal, activated char with greater specific surface area and total pore volume exhibited superior adsorption capacity. The adsorption process was well-described by the pseudo-second-order kinetic model.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 260-269"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097195","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":"Self-polymerization of dopamine on zinc oxide nanoparticles for enhanced corrosion resistance in epoxy-aluminum coatings","authors":"Yasin Albarqouni ,&nbsp;Nurul Huda Abu Bakar ,&nbsp;Mohammad R. Thalji ,&nbsp;Arman Abdullah","doi":"10.1016/j.cjche.2025.05.024","DOIUrl":"10.1016/j.cjche.2025.05.024","url":null,"abstract":"<div><div>Conventional organic coatings often face limitations in providing long-term corrosion protection in aggressive environments. This study introduces a dual-functional polydopamine-zinc oxide (PD-Z) composite incorporated into an epoxy (EP) matrix (PD-Z/EP) to enhance the hydrophobicity and corrosion resistance of aluminum substrates. Characterization analyses confirmed the successful fabrication of the PD-Z composite. Electrochemical measurements, specifically potentiodynamic polarization, are conducted after three days of immersion in a 3.5% (mass) NaCl solution, significantly decreasing corrosion current density (<em>I</em>_corr) from 249.4 nA·cm⁻² for pure EP to 167 nA·cm⁻² for PD-Z/EP. Concurrently, the corrosion rate decreased from 0.004 to 0.0002 mm·a⁻¹. Additionally, electrochemical impedance spectroscopy (EIS) demonstrated a marked increase in the low-frequency impedance modulus (|<em>Z</em>|₀.₀₁ _Hz) from 0.07 × 10⁶ to 1.2114 × 10⁶ Ω·cm², indicating superior corrosion inhibition. The exceptional anodic and cathodic protective performance of the PD-Z/EP coating is attributed to the synergistic effects of polydopamine and ZnO, which enhance chloride ion entrapment, hydrophobic barrier properties, and overall corrosion resistance.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 304-315"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156513","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":"Modulating titanium dioxide electron transport layer by self-doping for high-efficiency carbon-based perovskite solar cells","authors":"Xin Peng,&nbsp;Rong Huang,&nbsp;Wenran Wang,&nbsp;Jianxin Zhang,&nbsp;Zhenxiao Pan,&nbsp;Yueping Fang,&nbsp;Huashang Rao,&nbsp;Xinhua Zhong,&nbsp;Guizhi Zhang","doi":"10.1016/j.cjche.2025.03.022","DOIUrl":"10.1016/j.cjche.2025.03.022","url":null,"abstract":"<div><div>In perovskite solar cells (PSCs), it is important to construct electron transport layer (ETL) with ideal surface morphology and advantageous electron transport dynamics. In this work, a functional TiO₂ ETL is designed and constructed based on a novel Ti³⁺ self-doping strategy. Experimental results indicate that Ti³⁺ dopant can optimize TiO₂ film crystallization process by facilitating the assembly of precursor particles, reducing the content of pore-forming reagent, and enhancing the adhesion of precursors to glass substrate in film formation process. Therefore, the modified surface morphology inhibits the formation of undesired hole structure. Besides, self-doping moderately generates oxygen vacancies on TiO₂ surface and a shallower TiO₂ Fermi energy level. These not only result in a stronger interfacial electronic coupling, but also establish an advantageous energy band alignment. These merits optimize interfacial electron transfer dynamics by inhibiting recombination loss and facilitating electron extraction. Benefiting from the optimized TiO₂ ETL, hole transport layer (HTL)-free carbon electrode based CsPbI₃ PSCs deliver a high efficiency of 18.62%, representing one of the highest levels in this field.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 348-354"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156527","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":"Co-production of biodiesel and methacrylated fatty acid through enzymatic catalysis with methyl methacrylate as acyl acceptor","authors":"Dong Lu ,&nbsp;Shuming Jin ,&nbsp;Qiuyang Wu,&nbsp;Jiahao Liu,&nbsp;Fang Wang,&nbsp;Li Deng,&nbsp;Kaili Nie","doi":"10.1016/j.cjche.2025.05.008","DOIUrl":"10.1016/j.cjche.2025.05.008","url":null,"abstract":"<div><div>Traditional biodiesel production primarily uses methanol as the acyl acceptor, but its toxicity to lipase increases process complexity and operational difficulty elevate manufacturing costs. This study aimed to explore a new method for enzymatic synthesis of biodiesel with methyl methacrylate (MMA) as acyl acceptor. Meanwhile, a 1, 3-position specific lipase Lipozyme RM IM was applied as biocatalyst, which enables simultaneous production of biodiesel (FAMEs) and methacrylate fatty acid glycerides (MFAGs) <em>via</em> specific <em>sn</em>-1, 3 transesterification of MMA with triglyceride. Under the optimal reaction conditions: temperature of 50 °C, molar ratio of 4:1 for MMA to triglyceride, enzyme dosage of 7.5% (mass), and an extra water addition of 0.5% (mass); triglyceride conversion rate of 97%, and FAMEs yield of 65% could be obtained. Simultaneously, the multistage short-path distillation and column chromatographic method were combined used for the separation of the mixed products. Finally, the purity of FAME, MFADG, DMFAG, and MMFAG were 98%, 97.8%, 95.3%, and 81.78%, respectively. In this new approach, MMA demonstrates lower toxicity to lipases, allowing for straightforward addition of all the substrates without complex addition process, and enhancing operational feasibility. Meanwhile, the by-products of MFAGs could be applied as monomers in varnishes and protective coatings, which increased the value of the products. Thus, this investigation providing an alternative way to produce biodiesel, and providing a new pathway for the sustainable development of biodiesel.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 16-24"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047911","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":"Optimization of methanol–vinyl acetate azeotrope separation process based on the pressure swing distillation and energy saving study","authors":"Xuefeng Feng ,&nbsp;Huiqin Zhou ,&nbsp;Yi Zhang ,&nbsp;Shaolan Zhuang ,&nbsp;Zhongwei Ding ,&nbsp;Qunsheng Li ,&nbsp;Yuxin Li","doi":"10.1016/j.cjche.2025.06.004","DOIUrl":"10.1016/j.cjche.2025.06.004","url":null,"abstract":"<div><div>This study delves into the optimization of the methanol–vinyl acetate (VAC) azeotrope separation process <em>via</em> pressure swing distillation (PSD), along with an evaluation of its energy-saving potential. The methanol–VAC system, a polar azeotrope highly susceptible to pressure variations, presents notable separation complexities in polyvinyl alcohol production. Aspen Plus simulations were utilized to assess the feasibility of PSD, with particular emphasis on critical process parameters such as the number of theoretical plates, feed position, reflux ratio, and sidestream extraction location. The results indicate that PSD demonstrates remarkable efficacy in separating methanol and VAC, achieving purities of 99.88% and 99.73% respectively. When compared to extractive distillation, PSD achieves a reduction of 9.07 t·h⁻¹ in steam consumption and minimizes wastewater generation by 20.77 t·h⁻¹. Furthermore, the economic assessment reveals a 7.91% decrease in the total annual cost associated with PSD. This study not only provides theoretical insights but also offers practical guidance for the design of energy-efficient and sustainable separation processes. Future research will focus on extending the analysis to encompass multi-pressure scenarios, further enhancing the applicability and robustness of the findings.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 167-181"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097138","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":"Mechanisms of competitive adsorption and diffusion of ethyl sulfide and n-butyl mercaptan with cyclohexene in FAU: MC and MD","authors":"Dongdong Chen ,&nbsp;Pei Xue ,&nbsp;Dongyang Liu ,&nbsp;Yuhao Zhang ,&nbsp;Liang Zhao ,&nbsp;Jinsen Gao","doi":"10.1016/j.cjche.2025.04.019","DOIUrl":"10.1016/j.cjche.2025.04.019","url":null,"abstract":"<div><div>An in-depth understanding of the competition mechanism between olefins and different types of sulfides in gasoline is essential to improve the desulfurization selectivity of the adsorption desulfurization process (ADS). In this study, the competitive adsorption and diffusion mechanism of two systems, diethyl sulfide/cyclohexene and <em>n</em>-butyl mercaptan/cyclohexene, with different adsorption amounts in siliceous faujasite zeolite (FAU) were investigated by Monte Carlo (MC) and molecular dynamics (MD). The systems exhibited a two-stage loading-dependent competitive adsorption and diffusion mechanism, with an inflection point of 32 molecule/UC (moleculers per microcoulomb). Before the inflection point (4–32 molecule/UC), the competition mechanism of the two systems was the “optimal-displacement” mechanism. After the inflection point, the mechanism of the diethyl sulfide/cyclohexene changed to “relocation-displacement”, while that of the <em>n</em>-butyl mercaptan/cyclohexene system changed to “dominant-displacement”. Compared to ether functional groups, the alcohol functional group has higher polarity and stronger adsorption stability, thus occupying more favorable adsorption sites within the supercages (SCs), while ethyl sulfide shifts outward to other sites within other SCs. In addition, the diffusion performance of adsorbent is related to the adsorption energy. The lower the adsorption energy, the weaker the diffusion ability. Meanwhile, the diffusion performance of adsorbates is better at high temperatures and low adsorption capacity. The effect of temperature on the desulfurization selectivity was determined. A lower temperature is favorable for the adsorption capacity of the two systems and the removal selectivity of sulfides. This study provides fundamental insights into the competitive adsorption and diffusion mechanisms among sulfides, mercaptans and olefins, offering theoretical guidance for adsorbent design and reaction temperature optimization.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 280-293"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097197","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":"Liquid–solid mass transfer in micropacked bed reactors with immiscible liquid–liquid two-phase flow","authors":"Yanfu Chen ,&nbsp;Chu Zhou ,&nbsp;Dang Cheng ,&nbsp;Fener Chen","doi":"10.1016/j.cjche.2025.04.006","DOIUrl":"10.1016/j.cjche.2025.04.006","url":null,"abstract":"<div><div>Herein, the liquid–solid mass transfer characteristics in micropacked bed reactors (μPBRs) operated with immiscible liquid–liquid two-phase flow is experimentally investigated. It is found that the overall volumetric liquid–solid mass transfer coefficient (<em>k</em>_s<em>a</em>) increases with the total flow rate and the channel-to-particle diameter ratio, while decreases with the organic-to-aqueous phase flow rate ratio. A satisfactory correlation model for calculating <em>k</em>_s<em>a</em> of the liquid–liquid μPBRs is developed. The new knowledge obtained would be useful in guiding the design and optimization of the liquid–liquid μPBRs.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 1-6"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047909","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":"Study on the desalination efficiency of hydrate phase by a pressure-driven filtration method","authors":"Yiwei Wu ,&nbsp;Zhenbin Xu ,&nbsp;Xiaohui Wang,&nbsp;Jin Cai,&nbsp;Tenghua Zhang,&nbsp;Peng Xiao,&nbsp;Changyu Sun,&nbsp;Guangjin Chen","doi":"10.1016/j.cjche.2025.03.010","DOIUrl":"10.1016/j.cjche.2025.03.010","url":null,"abstract":"<div><div>The mechanism of hydrate-based desalination is that water molecules would transfer to the hydrate phase during gas hydrate formation process, while the salt ions would be conversely concentrated in the unreacted saltwater. However, the salt concentration of hydrate decomposed water and the desalination degree of hydrate phase are still unclear. The biggest challenge is how to effectively separate the hydrate phase and the remaining unreacted salt water, and then decompose the hydrate phase to measure the salt concentration of hydrate melt water. This work developed an apparatus and pressure-driven filtration method to efficiently separate the hydrate phase and the remaining unreacted saltwater. On this basis, the single hydrate phase was obtained, then it was dissociated and the salt concentration of hydrate melt water was measured. The experimental results demonstrate that when the initial salt mass concentration is 0.3% to 8.0%, the salt removal efficiency for NaCl solution is 15.9% to 29.8% by forming CO₂ hydrate, while for CaCl₂ solution is 28.9% to 45.5%. The solute CaCl₂ is easier to be removed than solute NaCl. In addition, the salt removal efficiency for forming CO₂ hydrate is higher than that for forming methane hydrate. The multi-stage desalination can continuously decrease the salt concentration of hydrate dissociated water, and the salt removal efficiency per stage is around 20%.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 66-75"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097707","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":"Integrating electrochemical and thermal models for improved lithium-lon battery energy storage system heat dissipation","authors":"Wenqi Yang ,&nbsp;Yiting Lin ,&nbsp;Jianglong Du ,&nbsp;Cheng Lian ,&nbsp;Honglai Liu","doi":"10.1016/j.cjche.2025.02.033","DOIUrl":"10.1016/j.cjche.2025.02.033","url":null,"abstract":"<div><div>Lithium-ion batteries (LIBs) are widely used in electrochemical battery energy storage systems (BESS) because of their high energy density, lack of memory effects, low self-discharge rate, and long cycle life. However, inadequate heat dissipation during their discharge process can significantly degrade battery performance. The improvement of BESS efficiency depends on the optimization of thermal management structures. In this work, we integrate the pseudo-two-dimensional (P2D) electrochemical model with a three-dimensional thermal model to analyze the heat generation and transfer processes within the BESS. The simulation results are closely aligned with the experimental results in terms of voltage and temperature rise curves. Under air cooling conditions of 293.15 K and 3 m·s⁻¹, the BESS has a maximum temperature of 308.60 K and a temperature difference of 9.22 K, ensuring safe operation. At 1 C, we suggest that enlarging the inlet and outlet areas improves the air-cooling efficiency, and transitioning environmental air-cooling temperatures after 2400 s of discharge effectively reduces the temperature difference and the energy consumption of the cooling equipment. This work provides valuable theoretical insights for optimizing the thermal design of BESS.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 393-407"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156567","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}