Chinese Journal of Chemical Engineering最新文献

{"title":"Investigation on the reducing parameters of the Helmholtz energy equation of state for methane/methanol binary with VLE data","authors":"Xuehui Wang ,&nbsp;Dan Dan ,&nbsp;Xinyue Hao ,&nbsp;Wei Lin ,&nbsp;Edward Wright","doi":"10.1016/j.cjche.2025.02.031","DOIUrl":"10.1016/j.cjche.2025.02.031","url":null,"abstract":"<div><div>Natural gas is widely regarded as an efficient, relatively clean, and economically viable energy source. Its safe operation and continuous supply through pipeline infrastructure has led to its prominence in the energy sector. Methanol plays an important role in the natural gas industry, typically serving as a solvent or hydrate inhibitor. Therefore, the accurate estimation of thermodynamic properties for methane/methanol binary is extremely important to optimise the operating parameter, maximise the dehydration effect, and reduce the cost. As the Helmholtz energy equation of state is expected to offer high accuracy in predicting the vapour−liquid equilibrium of methane/methanol binary, four reducing parameters were derived based on collected experimental data. Additionally, the sensitivities of various reducing parameter combinations were simultaneously investigated. The results demonstrated a strong agreement between predicted fractions and experimental data, with the UMADs (uncertainty-weighted mean absolute deviation) of 3.484 and 0.665 for liquid and vapour phases, respectively. Meanwhile, it is deemed “very likely”, “likely”, and “unlikely” to achieve acceptable prediction for 3-parameter optimisation, 2-parameter optimisation and, 1-parameter optimisation, respectively.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 160-170"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596790","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 of ciprofloxacin on (Zn-Al) LDHs modified 3D reduced graphene oxide: Response surface methodology, adsorption equilibrium, kinetic and thermodynamic studies","authors":"Chong Lu,&nbsp;Xingwei Han,&nbsp;Haojun Zou,&nbsp;Xue Gao,&nbsp;Sijia Wang","doi":"10.1016/j.cjche.2025.01.014","DOIUrl":"10.1016/j.cjche.2025.01.014","url":null,"abstract":"<div><div>The indiscriminate use and disposal of ciprofloxacin (CIP) have led to its detection in water globally, which pose a huge risk to public health and water environment. Herein, (Zn-Al) LDHs modified 3D reduced graphene oxide nanocomposite ((Zn-Al) LDHs/3D-rGO) was synthesized through a feasible one-pot hydrothermal method for CIP removal. The highly distributed (Zn-Al) LDHs flakes on the surface of 3D-rGO endow the resulted (Zn-Al) LDHs/3D-rGO with an excellent adsorption performance for CIP. The adsorption results showed that the adsorption process could be well interpreted by Temkin isothermal model and the pseudo second-order kinetics model. The maximal adsorption capacity of 20.01 mg·g⁻¹ for CIP could be achieved under the optimal conditions optimized by response surface methodology (RSM). The inhibitory effect of co-existing ions on CIP adsorption were also discussed. The probable adsorption mechanism might be ascribed to π−π interactions, hydrogen bonding, electrostatic, and surface complexation. Regeneration tests showed that the obtained 3D porous material also possessed pronounced recyclability. The obtained (Zn-Al) LDHs/3D-rGO holds a great potential for removal of CIP from actual wastewater.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 125-136"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596791","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":"Effect of elevated pressure on isobaric molar heat capacity","authors":"Sheguang Ding","doi":"10.1016/j.cjche.2024.09.034","DOIUrl":"10.1016/j.cjche.2024.09.034","url":null,"abstract":"<div><div>Isobaric molar heat capacity affected by pressures for non-ideal gases is calculated theoretically at specified temperatures by means of gaseous equations of state, <em>i</em>.<em>e</em>. Redlish-Kwong (RK) Equation, Soave-Redlich-Kwong (SRK) Equation, Peng-Robinson (PR) Equation, Virial Equation, coupled with Romberg numeric integral <em>via</em> solving the key obstacle (∂<em>V</em>/∂<em>T</em>)_<em>p</em>, and integral (∂²<em>V</em>/∂<em>T</em>²)_<em>p</em>. As an example, methane's <em>C</em>_<em>p</em> is calculated at constant 300 K but 1 MPa &amp; 10 MPa. The calculation results show that less than 2% relative errors occur in comparison with literature values at any specified temperatures and pressures if no phase change survives at elevated pressure <em>P</em>₂ and temperature <em>T</em>, or when specified temperatures are greater than critical temperatures in spite of elevated pressures. However, greater errors would be present if gases were considered to be ideal, or if temperatures are lower than critical temperatures at elevated pressures (&gt;10 MPa), because <em>C</em>_<em>p</em> is the function of both temperature and pressure. In particular, elevated pressures have significant effect on <em>C</em>_<em>p</em>.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"82 ","pages":"Pages 294-308"},"PeriodicalIF":3.7,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144231410","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":"A technological process for extracting vanadium from leaching solution of sodium roasting of vanadium slag by manganese salt pretreatment","authors":"Mengxia Liu ,&nbsp;Tao Jiang ,&nbsp;Jing Wen ,&nbsp;Zibi Fu ,&nbsp;Tangxia Yu ,&nbsp;Changqing Li ,&nbsp;Xinyu An","doi":"10.1016/j.cjche.2024.12.027","DOIUrl":"10.1016/j.cjche.2024.12.027","url":null,"abstract":"<div><div>The ammonium salt precipitation method is frequently utilized for extracting vanadium from the leaching solution obtained through sodium roasting of vanadium slag. However, Na⁺ and NH₄⁺ ions in the vanadium precipitation solution can not be effectively separated, leading to a large amount of ammonia-nitrogen wastewater which is difficult to treat. In this study, the manganese salt pretreatment process is used to extract vanadium from a sodium roasting leaching solution, enabling the separation of vanadium and sodium. The vanadium extraction product of manganese salt is dissolved in acid to obtain vanadium-containing leaching solution, then vanadium is extracted by hydrolysis and vanadium precipitation, and V₂O₅ is obtained after impurity removal and calcination. The results show that the rate of vanadium extraction by manganese salt is 98.23%. The vanadium extraction product by manganese salt is Mn₂V₂O₇, and its sodium content is only 0.167%. Additionally, the acid solubility of vanadium extraction products by manganese salt is 99.52%, and the vanadium precipitation rate of manganese vanadate solution is 92.34%. After the removal of manganese and calcination process, the purity of V₂O₅ product reached 97.73%, with a mere 0.64% loss of vanadium. The Mn²⁺ and NH₄⁺ ions in the solution after vanadium precipitation are separated by precipitation method, which reduces the generation of ammonia-nitrogen wastewater. This is conducive to the green and sustainable development of the vanadium industry.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"81 ","pages":"Pages 219-231"},"PeriodicalIF":3.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922791","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":"Functional evidential reasoning model (FERM) – A new systematic approach for exploring hazardous chemical operational accidents under uncertainty","authors":"Qianlin Wang ,&nbsp;Jiaqi Han ,&nbsp;Lei Cheng ,&nbsp;Feng Wang ,&nbsp;Yiming Chen ,&nbsp;Zhan Dou ,&nbsp;Bing Zhang ,&nbsp;Feng Chen ,&nbsp;Guoan Yang","doi":"10.1016/j.cjche.2024.12.021","DOIUrl":"10.1016/j.cjche.2024.12.021","url":null,"abstract":"<div><div>This paper proposed a new systematic approach – functional evidential reasoning model (FERM) for exploring hazardous chemical operational accidents under uncertainty. First, FERM was introduced to identify various causal factors and their performance changes in hazardous chemical operational accidents, along with determining the functional failure link relationships. Subsequently, FERM was employed to elucidate both qualitative and quantitative operational accident information within a unified framework, which could be regarded as the input of information fusion to obtain the fuzzy belief distribution of each cause factor. Finally, the derived risk values of the causal factors were ranked while constructing multi-level accident causation chains to unveil the weak links in system functionality and the primary roots of operational accidents. Using the specific case of the “1·15” major explosion and fire accident at Liaoning Panjin Haoye Chemical Co., Ltd., seven causal factors and their corresponding performance changes were identified. Additionally, five accident causation chains were uncovered based on the fuzzy joint distribution of the functional assessment level (FAL) and reliability distribution (RD), revealing an overall increase in risk along the accident evolution path. The research findings demonstrated that FERM enabled the effective characterization, rational quantification and accurate analysis of the inherent uncertainties in hazardous chemical operational accident risks from a systemic perspective.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"81 ","pages":"Pages 255-269"},"PeriodicalIF":3.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929516","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":"A three-dimensional CFD numerical simulation study on pressurized oxy-fuel gasification of poultry manure in an industrial-scale gasifier","authors":"Qinwen Liu ,&nbsp;Guoqing Lian ,&nbsp;Wenli Dong ,&nbsp;Yu Su ,&nbsp;Wei Quan Leong ,&nbsp;Chi-Hwa Wang ,&nbsp;Wenqi Zhong","doi":"10.1016/j.cjche.2025.03.001","DOIUrl":"10.1016/j.cjche.2025.03.001","url":null,"abstract":"<div><div>As a renewable energy source, the thermal conversion of poultry manure, is a promising waste treatment solution that can generate circular economic outputs such as energy and reduce greenhouse gas emissions. Currently, pressurized gasification of poultry manure is still a novel research field, especially when combined with a novel technological route of oxy-fuel gasification. Oxy-fuel gasification is a newly proposed and promising gasification technology for power generation that facilitates future carbon capture and storage. In this work, based on a commercially operated industrial-scale chicken manure gasification power plant in Singapore, we presented an interesting first exploration of the coupled pressurization technology for oxy-fuel gasification of poultry manure using CFD numerical simulation, analyzed the effects of pressure and oxygen enrichment concentration as well as the coupling mechanism between them, and discussed the conversion and emission of nitrogen- and sulfur-containing pollutants. The results indicate that under oxy-fuel gasification condition (Oxy-30, <em>i.e</em>., 30%O₂/70%CO₂), as the pressure increases from 0.1 to 0.5 MPa, the CO concentration in the syngas increases slightly, the H₂ concentration increases to approximately 25%, and the CH₄ concentration (less than 1%) decreases, resulting in an increase in the calorific value of syngas from 5.2 to 5.6 MJ·m⁻³. Compared to atmospheric pressure conditions, a relatively higher oxygen-enriched concentration interval (Oxy-40 to Oxy-50) under pressurized conditions is advantageous for autothermal gasification. Pressurization increases NO precursors production and also promotes homogeneous and heterogeneous reduction of NO, and provides favorable conditions for self-desulfurization. This work offers reference for the realization of a highly efficient and low-energy-consumption thermochemical treatment of livestock manure coupled with negative carbon emission technology.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"81 ","pages":"Pages 115-127"},"PeriodicalIF":3.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899505","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":"Acid-base regulation in duodenum by intestinal fluid secretion: A simulation study","authors":"Yulan Zhao ,&nbsp;Yifan Qin ,&nbsp;Xiao Dong Chen ,&nbsp;Jie Xiao","doi":"10.1016/j.cjche.2024.12.014","DOIUrl":"10.1016/j.cjche.2024.12.014","url":null,"abstract":"<div><div>Up to now, how the secretion modes of intestinal fluid (<em>i.e.,</em> pancreaticobiliary secretion and wall secretion) can regulate intestinal acid-base environment has not been fully understood. Understanding the regulation mechanism is not only of great significance for intestinal health but may also lead to optimized designs for bio-inspired soft elastic reactors (SERs). In this work, the mixing and reaction of acidic gastric juice and alkaline intestinal fluid in a 3D duodenum with moving walls were modelled. A unique feature of this model is the implementation of both pancreaticobiliary and wall secretion of intestinal fluid as boundary conditions. This model allowed us to quantitatively explore the influence of secretion modes on pH regulation. The results demonstrated that coexistence of both pancreaticobiliary and wall secretions is the key to maintain the average pH in the duodenum at about 7.4. Their coexistence synergistically promotes the mixing and reaction of acid-base digestion liquids and provides a suitable catalytic environment for lipase in the intestine.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"81 ","pages":"Pages 76-86"},"PeriodicalIF":3.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894481","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":"Preparation of Co-MnOx/GAC catalyst by high-gravity technology and its mechanism for synergistic catalytic ozone degradation of phenol","authors":"Cibin Wang ,&nbsp;Kangrui Nie ,&nbsp;Zhiwei Zhao ,&nbsp;Yan Xue ,&nbsp;Tong Zhao ,&nbsp;Fuming Miao ,&nbsp;Youzhi Liu ,&nbsp;Weizhou Jiao","doi":"10.1016/j.cjche.2024.12.007","DOIUrl":"10.1016/j.cjche.2024.12.007","url":null,"abstract":"<div><div>The impregnation method for preparing catalysts often faces challenges such as prolonged preparation times and poor dispersion of active components due to the limited mobility of the impregnation liquid. The rotating packed bed (RPB) can break the precursor solution into fine droplets, enabling dynamic impregnation of active components onto the surface of activated carbon. This approach facilitates the uniform distribution of active components on the carrier and enhances the stability and performance of the catalyst. In this study, activated carbon catalysts were prepared using high-gravity technology. It was found that the preparation time for Co-MnO_<em>x</em>/GAC using the RPB method was reduced by 98%, the catalytic activity increased by 6.62%, and the loadings of active components increased by 13% and 17%, the catalytic activity remained stable after five cycles, with a significantly lower rate of metal dissolution. A suite of complementary analytical techniques demonstrates that Co-MnO_<em>x</em>/GAC(RPB) has higher homogeneity and dispersion. X-ray photoelectron spectroscopy (XPS) results indicate that Co(II) and Mn(IV)/Mn(III) are the primary active sites during the catalytic decomposition of ozone, elucidating the mechanism of synergistic catalytic ozonation by dual-active components. Finally, electron paramagnetic resonance (EPR) confirmed that hydroxyl radicals (·OH) were the predominant reactive species in the reaction.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"81 ","pages":"Pages 208-218"},"PeriodicalIF":3.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922789","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":"Thermodynamics insights into the gas-phase synthesis of glycolide from methyl glycolate","authors":"Dai Zhang ,&nbsp;Xiaofeng Xu ,&nbsp;Yueqiang Cao ,&nbsp;Wei Li ,&nbsp;Jinghong Zhou ,&nbsp;Xinggui Zhou","doi":"10.1016/j.cjche.2024.12.024","DOIUrl":"10.1016/j.cjche.2024.12.024","url":null,"abstract":"<div><div>Gas-phase synthesis of glycolide (GL) from methyl glycolate (MG) is of great significance for producing biodegradable polyglycolic acid. Here, we report a detailed thermodynamics study for the gas-phase synthesis of GL from MG, which involves complex reaction pathways, by utilizing the Gibbs free energy minimization method. The results indicate that the decompositions of MG and GL and the polymerization of MG are thermodynamically favorable as compared with the target pathway, <em>i.e.</em>, the cyclization of MG. Effects of the reaction conditions including temperature, pressure and feed composition on the formation of GL and linear polymers have also been addressed, which demonstrate that the higher temperature and lower pressure can effectively inhibit the formation of linear methyl ester dimer and improve the selectivity to GL. In addition, the higher N₂/MG ratio is beneficial for the formation of GL in the process promoted by catalysts. These thermodynamics results indicate that the process promoted by catalysts would benefit from the kinetics control by high-performance catalysts and the operation at high temperature, low pressure and high N₂/MG ratio to enhance the yield of targeted GL. The insights demonstrated here from thermodynamics are valuable for guiding the design of catalysts and/or optimization of reaction conditions for the gas-phase synthesis of GL from MG.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"81 ","pages":"Pages 171-181"},"PeriodicalIF":3.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143903925","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":"Construction of hydrophobic CuCl@AC–PTFE composites with an enhanced Cu(I) stability for efficient CO adsorption","authors":"Jingru Dou,&nbsp;Yingxuan Wen,&nbsp;Fangfang Zhang,&nbsp;Falong Shan,&nbsp;Shougui Wang,&nbsp;Jipeng Dong,&nbsp;Fei Gao,&nbsp;Guanghui Chen","doi":"10.1016/j.cjche.2025.01.005","DOIUrl":"10.1016/j.cjche.2025.01.005","url":null,"abstract":"<div><div>Cu(I) based CO adsorbents are prone to oxidation and deactivation owing to the sensitivity of Cu⁺ ions to oxygen and moisture in the humid air. In this study, in order to improve its antioxidant performance, hydrophobic Cu(I) based adsorbents were fabricated using polytetrafluoroethylene (PTFE) for the hydrophobic modification, effectively avoiding the contact of CuCl active species with moisture, thereby inhibiting the oxidation of the Cu(I) based adsorbents. The successful introduction of PTFE into the activated carbon (AC) carrier significantly improves the hydrophobicity of the adsorbent. The optimal adsorbent CuCl(6)@AC–PTFE(0.10%) with the CuCl loading of 6 mmol·g⁻¹ and the PTFE mass concentration of 0.10% exhibits an excellent CO adsorption capacity of 3.61 mmol·g⁻¹ (303 K, 500 kPa) as well as high CO/CO₂ and CO/N₂ adsorption selectivities of 29 and 203 (303 K, 100 kPa). Particularly, compared with the unmodified adsorbents, the antioxidant performance of modified adsorbent CuCl(6)@AC–PTFE(0.10%) is significantly improved, holding 86% of CO adsorption performance of fresh one after 24 h of exposure to humid air with a relative humidity of 70%, making the fabricated composite a promising adsorbent for CO separation.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"81 ","pages":"Pages 23-31"},"PeriodicalIF":3.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891310","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}