Chinese Journal of Chemical Engineering最新文献

{"title":"Separation of chlorine–bromine-based solid solution in bittern tail solution by phase equilibrium","authors":"Yulong Zhang ,&nbsp;Hongchao Yue ,&nbsp;Yanru Zhang ,&nbsp;Yun Li ,&nbsp;Hongfei Guo ,&nbsp;Dong Xu ,&nbsp;Jilin Cao","doi":"10.1016/j.cjche.2025.03.009","DOIUrl":"10.1016/j.cjche.2025.03.009","url":null,"abstract":"<div><div>Solid solution hinders the extraction of bromine resources from bittern. To separate chlorine–bromine-based solid solution in bittern tail solution, the solubilities of the quaternary system KCl–KBr–NaCl–NaBr–H₂O and its ternary subsystem NaBr–KBr–H₂O at 333.15 K were determined by the isothermal dissolution method, and the corresponding phase diagrams were conducted. An improved model was employed to predict the solubilities of the quaternary system KCl–KBr–NaCl–NaBr–H₂O at 333.15 K. The calculated results coincide with the experimental values, implying that the prediction method is feasible. A closed loop crystallization process for the separation of chlorine–bromine-based solid solution in bittern tail solution was proposed and NaBr was obtained with a purity of 98.23%.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 62-71"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144580485","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":"Efficient hydrogen evolution from Amberlyst-15 mediated hydrolysis of ammonia borane under mild conditions","authors":"Yilun Dong ,&nbsp;Kang Xue ,&nbsp;Zexing He ,&nbsp;Chongjun Li ,&nbsp;Ruijie Gao ,&nbsp;Zhenfeng Huang ,&nbsp;Chengxiang Shi ,&nbsp;Xiangwen Zhang ,&nbsp;Lun Pan ,&nbsp;Jijun Zou","doi":"10.1016/j.cjche.2025.02.030","DOIUrl":"10.1016/j.cjche.2025.02.030","url":null,"abstract":"<div><div>The efficient and cost-effective implementation of ammonia borane (AB) hydrolysis dehydrogenation for hydrogen storage is crucial. This study investigated the role of solid acid Amberlyst-15 (A-15) for hydrogen evolution from AB hydrolysis. Notably, AB hydrogen evolution rate can reach 194.15 ml·min⁻¹ at 30 °C, with a low apparent activation energy of 8.20 kJ·mol⁻¹. After five cycles of reuse, the reaction involving A-15 could keep a conversion rate of about 93%. The AB hydrolysis follows quasi first-order kinetics with respect to the AB concentration and quasi zero-order kinetics with respect to the A-15 mass. According to the characterization results of XRD, ATR-FTIR, and <em>in-situ</em> MS, the boric acid was the dominant hydrolyzate, while water as a hydrogen donor in this reaction. Furthermore, based on the reasoning that hydrogen bonds between A-15 and AB (aq) promotes the diffusion of AB, release of H₂ and the cleavage of O—H bond of H₂O, a possible mechanism was proposed.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 217-228"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614040","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":"Investigation of reaction pathways and kinetics in the gas-phase noncatalytic oxidation of hexafluoropropylene","authors":"Xintuo Chen ,&nbsp;Wencong Chen ,&nbsp;Yu Zhou ,&nbsp;Liangliang Zhang ,&nbsp;Jianfeng Chen","doi":"10.1016/j.cjche.2025.02.023","DOIUrl":"10.1016/j.cjche.2025.02.023","url":null,"abstract":"<div><div>Hexafluoropropylene oxide (HFPO) is a crucial fluorinated chemical mainly synthesized from hexafluoropropylene (HFP) through the oxidation of oxygen. However, the reaction network and kinetic characteristics are not fully understood yet, resulting in a lack of theoretical basis for synthesis process improvement. Here, the free radical reaction mechanism and complete reaction network involved in the noncatalytic oxidation of HFP to synthesize HFPO was explored by density functional theory. Transition state theory was employed to calculate the intrinsic reaction rate constants for elementary reactions. Based on theoretical reaction rate ratios, reaction pathways were selected, and a simplified reaction network was derived. It was found that byproducts were formed owing to the decomposition of HFPO and subsequent reactions with excessive oxygen while oxygen tended to participate more in the main reaction under oxygen-deficient conditions. The variations in reaction pathways occurring at different HFP/oxygen molar ratios was well elucidated by comparing with experimental data. This research establishes a robust theoretical foundation for optimizing and regulating the synthesis of HFPO.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 286-297"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631143","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":"Biomass-derived nitrogen-doped porous carbon as a sustainable flow-electrode material for enhanced capacitive deionization","authors":"Hongyang Liu ,&nbsp;Li Zhang ,&nbsp;Jiali Cai ,&nbsp;Siyu Liu ,&nbsp;Cuijiao Zhao ,&nbsp;Shuyu Wang ,&nbsp;Mengyu Zhao ,&nbsp;Menglong Liu ,&nbsp;Wenwen Ding ,&nbsp;Hongjian Zhou ,&nbsp;Weiji Dai ,&nbsp;Saifang Huang","doi":"10.1016/j.cjche.2025.04.001","DOIUrl":"10.1016/j.cjche.2025.04.001","url":null,"abstract":"<div><div>Freshwater scarcity has emerged as a critical global environmental challenge. Flow-electrode capacitive deionization (FCDI) represents a promising technology for achieving efficient and low-energy seawater desalination. This study presents a novel flow-electrode material, nitrogen-doped porous carbon (NPC), which is derived from biomass and demonstrates both cost-effectiveness and high performance. The NPC material is synthesized from bean shells through high-temperature pre-carbonization followed by activation with KHCO₃, resulting in a rich porous structure, increased specific surface area, and high graphitization degree, which collectively confer superior capacitance performance compared to activated carbon (AC). Desalination experiments indicate that the FCDI performance of the NPC flow-electrode surpasses that of the AC flow-electrode. Specifically, at a voltage of 2.5 V in a 6 g·L⁻¹ NaCl solution, the NPC system achieves an average salt removal rate (ASRR) of 104.9 μg·cm⁻²·min⁻¹, with a charge efficiency (CE) of 94.0% and an energy consumption (EC) of only 4.4 kJ·g⁻¹. Furthermore, the NPC-based FCDI system exhibits commendable desalination cycling stability, maintaining relatively stable energy consumption and efficiency after prolonged continuous desalination cycles. This research holds significant implications for the advancement of environmentally friendly, low-cost, high-performance FCDI systems for large-scale applications.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 244-253"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614487","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":"Stochastic analysis in gas–solid two-phase flow in the dense-phase pneumatic conveying of pulverized coal","authors":"Yong Jin ,&nbsp;Weizhong Gu","doi":"10.1016/j.cjche.2025.04.002","DOIUrl":"10.1016/j.cjche.2025.04.002","url":null,"abstract":"<div><div>The complex dense-phase pneumatic conveying of pulverized coal process was studied using an electrical capacitance tomography (ECT) signal that represented the motion characteristics of gas–solid two-phase flow. The fluctuation characteristics of conveying process signals are inseparable from the flow pattern. The denoised ECT signal and noise signal were obtained by db2 wavelet analysis. It was found that all noise signals were white Gaussian noise. Based on the assumption of the equal probability distribution of pulverized coal concentration, this paper proved that the time series distribution of pulverized coal concentration in the pipeline should obey the normal distribution. Furthermore, through the analysis of the distribution characteristics of the power spectral density function of denoised ECT signals of four flow patterns, they were <em>α</em>-dimensional fractal Brownian motion (fBm) signals, and the parameter <em>α</em> was estimated by the detrended fluctuation analysis. Based on the fBm characteristics of denoised ECT signals and white Gaussian noise, this paper proposed a method for calculating the pulverized coal concentration in the dense-phase pneumatic conveying. In addition to the method of concentration estimation with the significance of engineering guidance, this research can help people to further understand essential characteristics of ECT signals in the dense-phase pneumatic conveying.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 26-37"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563639","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":"Adsorption behavior and inhibition performance of octadecyl dimethyl benzyl ammonium chloride on steel surface in phosphoric acid medium: Experimental and theoretical investigations","authors":"Yu Peng ,&nbsp;Shuli Li ,&nbsp;Shuduan Deng ,&nbsp;Xianghong Li","doi":"10.1016/j.cjche.2025.03.016","DOIUrl":"10.1016/j.cjche.2025.03.016","url":null,"abstract":"<div><div>A biodegradable and green organic compound octadecyl dimethyl benzyl amm-onium chloride (ODBAC) was used as an efficient inhibitor for cold rolled steel (CRS) in phosphoric acid (H₃PO₄). The mechanism of adsorption and film formation of ODBAC on CRS was studied through experimental and theoretical calculations. The weight loss method shows that the inhibition efficiency of ODBAC can reach 92.01% at a concentration of 10 mg·L⁻¹. The adsorption of ODBAC on the CRS surface conforms to the Langmuir isotherm model, which is a mixed adsorption mainly based on physical adsorption. The X-ray photoelectron spectroscopy (XPS) and contact angle results confirmed the existence of the ODBAC film and steel surface's hydrophobicity has been significantly enhanced. Electrochemical test results reveal that the film's formation mainly inhibits the cathodic corrosion reaction and effectively increases the charge transfer resistance. Quantum chemical calculations have found that N18 in ODBAC and C24 and C25 on the benzene ring are the key active adsorption sites. Molecular dynamics simulation results indicate that ODBAC can sharply reduce the free fraction volume to 8% and inhibit the diffusion of corrosion particles, meaning that the formed ODBAC film makes it difficult for corrosion particles to penetrate, thus improving the corrosion resistance of CRS in H₃PO₄.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 72-87"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144588581","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":"Removal of deposited metal particles on a horizontal surface by vertical submerged impinging jets","authors":"Han Peng ,&nbsp;Xinliang Jia ,&nbsp;Xiaofang Guo ,&nbsp;Yubo Jiang ,&nbsp;Zhipeng Li ,&nbsp;Zhengming Gao ,&nbsp;J.J. Derksen","doi":"10.1016/j.cjche.2025.02.017","DOIUrl":"10.1016/j.cjche.2025.02.017","url":null,"abstract":"<div><div>Jet agitation is known as a maintenance-free stirring technique for nuclear wastewater treatment and demonstrates great potential in transport of radioactive particles. Removal processes of horizontal sediment beds driven by impinging jets were experimentally investigated using image capture and processing technique. The beds were composed of heavy fine particles with particle density ranging from 3700 to 12600 kg·m⁻³ and particle diameter from 5 to 100 μm. The jet Reynolds number varied between 4300 and 9600. The single-phase large eddy simulation method was used for calculating both jet flow characteristics and wall shear stresses. The effects of jet strength, particle density, particle diameter, and bed thickness on bed mobility in terms of the critical Shields numbers were considered. Specifically, the critical Shields number was found to be intricately related to properties of particles, and independent of jet intensity. A new Shields number curve for stainless-steel particles was found, and a model was proposed to predict the transport rate of thin beds, with <em>R</em>² = 0.96.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 137-147"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596792","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":"Coarse-grained molecular dynamics simulations on self-assembly of polystyrene-block-poly(2-Vinylpyridine)","authors":"Daiwen Li ,&nbsp;Shoutian Qiu ,&nbsp;Gan Liu ,&nbsp;Ming Liu ,&nbsp;Mingjie Wei ,&nbsp;Shipeng Sun ,&nbsp;Weihong Xing ,&nbsp;Xiaohua Lu ,&nbsp;Yong Wang","doi":"10.1016/j.cjche.2025.02.032","DOIUrl":"10.1016/j.cjche.2025.02.032","url":null,"abstract":"<div><div>Self-assembly of block copolymers (BCPs) is highly intricate and is adsorbing extensive experimental and simulation efforts to reveal it for maximizing structural order and device performances. The coarse-grained (CG) molecular dynamics (MD) simulation offers a microscopic angle to view the self-assembly of BCPs. Although some molecular details are sacrificed during CG processes, this method exhibits remarkable computational efficiency. In this study, a comprehensive CG model for polystyrene-<em>block</em>-poly(2-vinylpyridine), PS-<em>b</em>-P2VP, one of the most extensively studied BCPs for its high Flory-Huggins interaction parameter, is constructed, with parameters optimized using target values derived from all-atom MD simulations. The CG model precisely coincides with various classical self-assembling morphologies observed in experimental studies, matching the theoretical phase diagrams. Moreover, the conformational asymmetry of the experimental phase diagram is also clearly revealed by our simulation results, and the phase boundaries obtained from simulations are highly consistent with experimental results. The CG model is expected to extend to simulate the self-assembly behaviors of other BCPs in addition to PS-<em>b</em>-P2VP, thus increasing understanding of the microphase separation of BCPs from the molecular level.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 15-25"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144548965","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":"Combustion behavior and pollutant emissions of the pressurized fluidized bed oxy-fuel co-firing of coal and poultry manure","authors":"Qinwen Liu ,&nbsp;Yiwei Zhang ,&nbsp;Hengbing Ye ,&nbsp;Guanwen Zhou ,&nbsp;Yu Su ,&nbsp;Wenli Dong ,&nbsp;Chi-Hwa Wang ,&nbsp;Wenqi Zhong","doi":"10.1016/j.cjche.2025.05.006","DOIUrl":"10.1016/j.cjche.2025.05.006","url":null,"abstract":"<div><div>Pressurized oxy-fuel combustion is a next-generation and low-cost carbon capture technology with industrial application potential. This work presents an innovative research exploration—coupling coal pressurized fluidized bed oxy-fuel combustion technology with energy utilization of poultry manure as a renewable and carbon-neutral fuel, in order to capture CO₂ and solve the problem of poultry manure treatment simultaneously. In this study, a stable co-combustion of coal and chicken manure in a laboratory-scale pressurized fluidized bed under typical oxy-fuel condition (30%O₂/70%CO₂, <em>i.e.</em>, Oxy-30) is achieved. The key parameters including the combustion pressure (0.1–0.5 MPa) and chicken-manure proportion (0% to 100%) and their impacts on fundamental combustion efficiency, carbon conversion, nitrogen and sulfur pollutant emissions, and residue ash characteristics have been investigated. The result show that pressurization favors an increase in the CO₂ enrichment concentration and fluidized bed combustion efficiency. During co-combustion under 0.1 and 0.3 MPa, the CO₂ concentration in the flue gas is the highest when the chicken manure blending ratio (<em>M</em>_pm) is 25%. Although the NO emissions fluctuate and even increase as <em>M</em>_pm increases, the co-combustion of coal and chicken manure exhibits a synergistic effect in reducing NO conversion rate (<em>X</em>_NO). The effect of pressurization on reducing NO emission is significant, <em>X</em>_NO at <em>M</em>_pm = 25% decreasing from 15% to 5% as the pressure (<em>P</em>) increases from 0.1 to 0.5 MPa. As <em>P</em> increases from 0.1 to 0.5 MPa and <em>M</em>_pm increases from 0% to 50%, the SO₂ emissions and conversion rates decrease. The self-desulfurization process plays an important role in the reduction of SO₂ emissions during pressurized oxy-fuel co-combustion. The aim of this work is to advance the development and application of pressurized fluidized bed oxy-fuel co-combustion technology and promote a circular bioeconomy and carbon-free waste management for biomass derived from livestock manure.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 171-181"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605243","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 purification process of electronic-rade cerium ammonium nitrate through crystallization","authors":"Yinghan Wang ,&nbsp;Li Yang ,&nbsp;Haoliang Wang ,&nbsp;Hao Wu ,&nbsp;Jingcai Cheng ,&nbsp;Chao Yang","doi":"10.1016/j.cjche.2025.03.014","DOIUrl":"10.1016/j.cjche.2025.03.014","url":null,"abstract":"<div><div>The purity of electronic-grade chemicals significantly impacts electronic components. Although crystallization has been used to purify cerium ammonium nitrate (CAN), the impurity removal mechanism underlying different crystallization parameters remains unclear. Traditional analytical methods of inductively coupled plasma mass spectrometry (ICP-MS) have problems in detecting trace Fe accurately, because of the high concentration of Ce and interference of polyatomic ions. Therefore, this study developed a new method integrating the standard addition and internal standard methods and explored the role of the kinetic energy discrimination mode. This new approach effectively overcomes Ce-related matrix interference and fills the gap in ultra-trace impurity detection. Furthermore, the study investigated the effects of cooling rate, seed mass loading and seed size on the removal of Fe impurity. The seed mass loading affects the average crystal size through regulating secondary nucleation and crystal growth. The removal of Fe in CAN is determined by surface adsorption and agglomeration. Under the condition of the cooling rate of 0.2 K·min⁻¹, and addition of 0.5% (mass) 600–680 μm seeds, the Fe content is the lowest, at only 0.24 mg·L⁻¹, and the Fe removal rate reaches 92.28%.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 148-159"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596782","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}