Chemical Engineering and Processing - Process Intensification最新文献_第6页

An in-situ strategy of modified biochar–activated persulfate for low-temperature livestock wastewater treatment: Dynamic reaction kinetics and computational fluid dynamics-based multi-unit structure reactor design 改性生物炭活化过硫酸盐原位处理低温牲畜废水的策略：动态反应动力学和基于计算流体动力学的多单元结构反应器设计

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-06-15 DOI: 10.1016/j.cep.2025.110412

Ruijie Zhang , Zhaoye Lin , Xuanyu Tao , Jiawen Yin , Yanwen Ma , Ying Sun

{"title":"An in-situ strategy of modified biochar–activated persulfate for low-temperature livestock wastewater treatment: Dynamic reaction kinetics and computational fluid dynamics-based multi-unit structure reactor design","authors":"Ruijie Zhang , Zhaoye Lin , Xuanyu Tao , Jiawen Yin , Yanwen Ma , Ying Sun","doi":"10.1016/j.cep.2025.110412","DOIUrl":"10.1016/j.cep.2025.110412","url":null,"abstract":"<div><div>Livestock wastewater treatment in cold regions is hampered by low temperatures, small scale, and dispersed wastewater. Our research group previously synthesized δ-MnO<sub>2</sub>/biochar (BC) material for early-stage wastewater treatment, which has good low-temperature application prospects. Static experiments show that the critical temperature to ensure efficient composite pollution removal is 15 °C. Herein, δ-MnO<sub>2</sub>/BC/persulfate was adopted as the core technology, the key parameters of wastewater treatment were explored through large-capacity continuous dynamic experiments, and a unit internal circulation reactor was designed and optimized. The kinetic experiment showed that the overall removal rate of antibiotics could reach 65.27 % ∼ 72.57 % under the optimal reaction condition and 15 °C. The removal rate of trace heavy metal Cd could reach 100 %. Combined with fluent simulations via computational fluid dynamics modeling and technology verification, an industrial dynamic continuous unit reactor was designed with a volume of 40 m<sup>3</sup>. After optimization, the designed multiunit reactor effectively ensured an internal water temperature of >15 °C, stable operation at external temperatures from −25 °C to −20 °C, and could withstand an extremely low outside temperature of −35 °C. This research describes an effective industrial treatment strategy for livestock wastewater in cold regions and provides a practical application of advanced oxidation technology based on catalytic materials.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110412"},"PeriodicalIF":3.8,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144364738","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

Optimizing underwater plasma discharges: Role of electrode geometry and electrical design 优化水下等离子体放电：电极几何和电气设计的作用

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-06-13 DOI: 10.1016/j.cep.2025.110409

Nikolay Sirotkin , Anton Manakhov , Tao Chen , Anna Khlyustova

{"title":"Optimizing underwater plasma discharges: Role of electrode geometry and electrical design","authors":"Nikolay Sirotkin , Anton Manakhov , Tao Chen , Anna Khlyustova","doi":"10.1016/j.cep.2025.110409","DOIUrl":"10.1016/j.cep.2025.110409","url":null,"abstract":"<div><div>This study investigates the optimization of underwater plasma discharges by examining the influence of electrode geometry and electrical design on contaminant removal efficiency. A plasma-chemical reactor capable of igniting multiple discharges within a solution was developed, utilizing iron and molybdenum electrodes to explore the electrical characteristics and energy distribution among discharge channels. Experimental results revealed that increasing the number of electrodes enhances discharge frequency, with the two-discharge configuration exhibiting the highest energy efficiency for chemical processes, including radical generation and hydrogen peroxide formation. Notably, the majority of input energy was dissipated as Joule heating; however, the two-discharge system demonstrated a reduced thermal gradient, favoring chemical reactions over thermal losses. Testing with a model dye-contaminated solution showed optimal degradation efficiency for the two-discharge setup, attributed to the synergistic effects of reactive species generation and electrode-derived oxide structures. Molybdenum electrodes, despite yielding lower hydrogen peroxide concentrations, achieved significant dye removal due to their high sorption capacity. These findings underscore the importance of discharge topology in reactor design, suggesting that sequential discharge architectures represent a promising approach to maximize oxidative capacity while minimizing energy dissipation. This work provides critical insights for advancing plasma-based water treatment technologies.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110409"},"PeriodicalIF":3.8,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298431","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

Conjugate heat transfer simulation and additional thermal resistance analysis in pillow plate heat exchangers 枕板式换热器的共轭传热模拟及附加热阻分析

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-06-11 DOI: 10.1016/j.cep.2025.110407

Haonan Ye, Jingtao Wang

{"title":"Conjugate heat transfer simulation and additional thermal resistance analysis in pillow plate heat exchangers","authors":"Haonan Ye, Jingtao Wang","doi":"10.1016/j.cep.2025.110407","DOIUrl":"10.1016/j.cep.2025.110407","url":null,"abstract":"<div><div>Pillow plate heat exchanger (PPHE) is a highly efficient heat exchanger element. The precise application of PPHE to heat exchanger scenarios can make a quantum leap in the field of heat exchangers. In this paper, we first added some missing power-law model relationships in the PPHE model. Including heat transfer and flow resistance coefficient of external flow channel, and heat transfer and resistance coefficient of non-circular welding spot models, which help to expand the heat transfer elements of welded plate heat exchangers. The focus of this paper is to investigate the heat transfer behavior more in line with the actual heat transfer process through conjugate convective heat transfer simulations. It is found that, in addition to the internal channel thermal resistance, outer channel thermal resistance, wall thermal resistance and fouling thermal resistance that exist in conventional heat exchangers, an additional thermal resistance exists in PPHE. The relationship between the magnitude of the additional thermal resistance and the Reynolds number of the flow in the inner channel outer channel can be represented by a power law model. This paper analyses in detail the causes of this additional thermal resistance, which will provide more accurate guidance for the design of PPHE heat exchangers.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110407"},"PeriodicalIF":3.8,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307891","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

Impact of reactive holdup on process configuration selection: Is a neat reactive distillation column possible for ethyl levulinate production process? 反应含率对工艺配置选择的影响：乙酰丙酸乙酯生产工艺是否可能有一个整洁的反应精馏塔？

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-06-10 DOI: 10.1016/j.cep.2025.110400

Devrim B. Kaymak

{"title":"Impact of reactive holdup on process configuration selection: Is a neat reactive distillation column possible for ethyl levulinate production process?","authors":"Devrim B. Kaymak","doi":"10.1016/j.cep.2025.110400","DOIUrl":"10.1016/j.cep.2025.110400","url":null,"abstract":"<div><div>Besides several advantages, biodiesel has some shortcomings which need the utilization of fuel additives. At this point, ethyl levulinate comes forward as one of the alternative fuel additives with its better cold flow properties and high oxygen content. In the literature on ethyl levulinate production processes, excess of a reactant is used to overcome conversion limitations. This results in multi-column process configurations where additional distillation columns besides a reactive column are used to separate excess reactant. In this study, the conceptual design of a cost-effective process configuration including a single reactive distillation column is proposed. This idea is based on the use of a reasonably higher liquid holdup on reactive trays to get significantly higher conversion and eliminate the excess usage of ethanol. As the result, the desired purity of ethyl levulinate is achieved by a neat reactive distillation column which reduces the total annual cost by 34 % compared to the excess ethanol configuration in the literature. In addition, a control structure is designed for this process configuration, and its robustness is evaluated against disturbances in feed flowrate and composition. Dynamic simulation results show satisfactory base-level regulatory control for this neat reactive distillation column.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110400"},"PeriodicalIF":3.8,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279578","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 study of particle deposition and removal behavior in the water-cooled flue of a submerged arc furnace 埋弧炉水冷烟道颗粒沉积与去除行为的数值研究

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-06-09 DOI: 10.1016/j.cep.2025.110404

Peng Liu , Kexin Gong , Dongmei Lin , Shuguo Guo , Zijian Ma , Zhongqiu Liu , Hong Zhang

{"title":"Numerical study of particle deposition and removal behavior in the water-cooled flue of a submerged arc furnace","authors":"Peng Liu , Kexin Gong , Dongmei Lin , Shuguo Guo , Zijian Ma , Zhongqiu Liu , Hong Zhang","doi":"10.1016/j.cep.2025.110404","DOIUrl":"10.1016/j.cep.2025.110404","url":null,"abstract":"<div><div>To solve the issue of fouling in traditional insulated flues, this study proposed a coil type water-cooled flue. Firstly, a comprehensive fouling model was developed based on the Johnson-Kendall-Roberts (JKR) theory and the Grant and Tabakoff particle-wall rebound model to simulate particle deposition, rebound, and removal behaviors within the water-cooled flue. Then, the effects of the cooling water inlet velocity, wall roughness, and inflection angle of tee section on the particle fouling characteristics were investigated. The results show that the particles are primarily deposited in the furnace mouth section, the external corners of the flue between sections I to III, the tee section, and the end of the blind pipe section within water-cooled flues owing to inertial collisions, low-velocity vortices, and thermophoretic force. Additionally, as the inlet velocity of cooling water increases from 0 to 1.6 m/s, the particle fouling mass decreases from 8.63 to 0.48 kg at <em>t</em> = 200 h. Conversely, as wall roughness increases from 0.1 to 1 mm, the particle fouling mass increases from 0.49 to 0.72 kg at <em>t</em> = 18 h. Furthermore, when the inflection angle <em>α</em> of the tee section increases from 60° to 110°, the fouling mass decreases from 0.54 to 0.48 kg at <em>t</em> = 18 h. Based on the comparative study of water-cooled and insulated flues, the water-cooled flue has a significant advantage in reducing particle deposition. To optimize particle deposition, the optimum inlet velocity of cooling water and the angle <em>α</em> are 1.2 m/s and 90°, respectively.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110404"},"PeriodicalIF":3.8,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313943","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

Continuous-flow synthesis of Clopidogrel through different chip-microreactors and comparing of performances with that of a batch approach: A CFD simulation and an optimization study 不同芯片微反应器连续流合成氯吡格雷及其与间歇法的性能比较：CFD模拟与优化研究

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-06-07 DOI: 10.1016/j.cep.2025.110389

Arman Mirchi, Mohammad Kazemeini, Vahid Hosseinpour

{"title":"Continuous-flow synthesis of Clopidogrel through different chip-microreactors and comparing of performances with that of a batch approach: A CFD simulation and an optimization study","authors":"Arman Mirchi, Mohammad Kazemeini, Vahid Hosseinpour","doi":"10.1016/j.cep.2025.110389","DOIUrl":"10.1016/j.cep.2025.110389","url":null,"abstract":"<div><div>Clopidogrel, is a widely used antiplatelet medication for heart patients globally. In recent years, the pharmaceutical industry has increasingly recognized the advantages of using a flow-based approach to drug production over traditional batch processing, which offers improved performance and safety, enhanced automation, and precise process control. The current research investigated the production of Clopidogrel using a continuous-flow approach in chip-microreactors. The study encompassed the design and simulation of novel micromixers and microreactors, followed by fabricating microfluidic chips with various geometries using laser engraving techniques. Clopidogrel was initially synthesized via the batch method and subsequently using a flow approach in the microreactors, with residence times of 25, 45, and 65 min, via a one-step synthesis route. The production and yield of the drug were validated through FTIR, HNMR, TLC, and HPLC analyses. The results indicated that microreactor C outperformed the others at all residence times, achieving a product yield of 38.9 % with a residence time of 65 min, compared to only 11.2 % from the batch approach under quite similar conditions. The continuous-flow approach demonstrated a promising yield of Clopidogrel in a significantly shorter duration of time and in a safer manner compared to the conventional batch procedure.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110389"},"PeriodicalIF":3.8,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144261371","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

Intermittent bed homogenization as a strategy for improving the biodrying process of orange solid waste biomass 间歇式床均质作为改进柑桔固体废弃物生物质生物干燥过程的策略

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-06-06 DOI: 10.1016/j.cep.2025.110399

Vinícius de C. Doimo da Silva , João P.M. de Souza , Antônio C.L. Horta , Thais S. Milessi , Gustavo D. Maia

{"title":"Intermittent bed homogenization as a strategy for improving the biodrying process of orange solid waste biomass","authors":"Vinícius de C. Doimo da Silva , João P.M. de Souza , Antônio C.L. Horta , Thais S. Milessi , Gustavo D. Maia","doi":"10.1016/j.cep.2025.110399","DOIUrl":"10.1016/j.cep.2025.110399","url":null,"abstract":"<div><div>This study investigates the effects of intermittent air flow rate (<em>Q</em>) and bed homogenization period (<em>BHP</em>) on the biodrying process of orange processing waste. A central composite design (CCD) was used to analyze the effect of these parameters on temperature and water removal. The minimum bed temperature (<em>T<sub>min</sub></em>) during the experiments ranged from 6.8 °C to 17.8 °C, while the mean and maximum temperatures ranged from 11.8 °C to 27.2 °C and 19.9 °C to 44.9 °C, respectively. The final moisture content ranged from 2.59 db to 1.58 db. Besides process achievement of 44.9 °C without external heat, CCD analysis showed that neither <em>Q</em> nor <em>BHP</em> had a significant effect on temperature during the biodrying process. While higher air flow rates improved moisture removal by convective mechanisms, they also increased evaporative cooling, which limited the temperature increase. Bed homogenization increased porosity and prevented preferential pathways but had a negligible effect on water loss and temperature increase. Biomass energy analysis showed that the biomass higher heating value (<em>HHV</em>) was maintained even in experiments where organic matter was consumed to generate heat. This indicates the integrity of the lignocellulosic compounds and preserves the potential of the waste for energy recovery. It was possible to identify challenges in optimizing biodrying processes, especially in systems with native microorganisms, highlighting the importance of detailed characterization of the microbiota. Future research should focus on refining operational parameters to improve water removal and thermal efficiency, thus contributing to sustainable waste management and process intensification.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110399"},"PeriodicalIF":3.8,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144261373","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

Process development for biooxidation of refractory gold ore using Ferroplasma acidophilum: A bench-scale case study of gold recovery 嗜酸铁等离子体生物氧化难处理金矿工艺研究：金矿回收的实验研究

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-06-05 DOI: 10.1016/j.cep.2025.110377

Mohammad Hossein Karimi Darvanjooghi , Sara Magdouli , Satinder Kaur Brar

{"title":"Process development for biooxidation of refractory gold ore using Ferroplasma acidophilum: A bench-scale case study of gold recovery","authors":"Mohammad Hossein Karimi Darvanjooghi , Sara Magdouli , Satinder Kaur Brar","doi":"10.1016/j.cep.2025.110377","DOIUrl":"10.1016/j.cep.2025.110377","url":null,"abstract":"<div><div>This study investigates the effects of biooxidation using <em>Ferroplasma acidiphilum</em> on gold recovery from high-grade (HGOS) and low-grade ore samples (LGOS). Pretreatment methods are caaried out in stirred tank reactors and column tests. Results showed that the stirred tank reactor yielded higher recovery rates for key elements, with gold recovery reaching 55 % for HGOS compared to 40 % for LGOS using the column test. Optimal conditions for biooxidation were identified, including aeration flow rates of 1.0–1.5 L/min and agitation speeds of 300–450 rpm, which facilitated effective microbial activity and pyrite dissolution. During cyanidation, gold recovery was highest at a pH of 10.5, with up to 60 % recovery at 8 (g/L) NaCN. However, at pH levels above 11, gold recovery decreased to around 40 % due to competing chemical species and metal hydroxide precipitation. The study also found that extending cyanidation time enhanced gold recovery, with significant increases observed within the first 10 h.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110377"},"PeriodicalIF":3.8,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144223265","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

Mechanism of NO removal by NH3 + CO coupling over Fe-Ce/AC catalyst at low temperature Fe-Ce/AC催化剂上NH3 + CO低温偶联脱除NO的机理

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-06-04 DOI: 10.1016/j.cep.2025.110392

Yihang Shi , Bangfu Huang , Keying Zhu , Fu Yuan , Xinchao Fan , Wei Li , Kui Zheng

{"title":"Mechanism of NO removal by NH3 + CO coupling over Fe-Ce/AC catalyst at low temperature","authors":"Yihang Shi , Bangfu Huang , Keying Zhu , Fu Yuan , Xinchao Fan , Wei Li , Kui Zheng","doi":"10.1016/j.cep.2025.110392","DOIUrl":"10.1016/j.cep.2025.110392","url":null,"abstract":"<div><div>In order to explore the activity and mechanism of low-temperature NH<sub>3</sub> + CO coupling removal of NO by catalysts prepared by loading transition metal element Fe and rare earth element Ce into activated carbon, Fe/AC, Ce/AC and Fe-Ce/AC catalysts were prepared in this paper. Based on the test of NO conversion rate and characterization of physicochemical properties of catalysts, the mechanism of low-temperature NH<sub>3</sub> + CO coupling removal of NO by catalysts was proposed. The results show that the Fe-Ce/AC catalyst has higher NO conversion than the single metal supported catalyst. Although the surface of Fe-Ce/AC catalyst is rough, the pores are fully developed, and the metal oxides are better loaded and uniformly dispersed. The N<sub>2</sub> isothermal adsorption-desorption curve showed typical I-type and IV-type isotherms, with H<sub>4</sub>-type hysteresis loop. Ce doping makes Fe uniformly loaded, the diffraction peaks of metal oxides weakened. Fe-Ce/AC has more oxygen-containing functional groups and oxygen vacancies than single metal supported catalysts. The Fe-Ce/AC catalyst is dominated by physical adsorption and <span>L</span>-H mechanism before 150 °C. Some Ce active components are dominated by E-R mechanism at 150∼200 °C. After 200 °C, the E-R mechanism is dominant.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110392"},"PeriodicalIF":3.8,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144239972","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

Immobilization of hazardous components in zinc leaching residue by autothermal roasting with pyrite 黄铁矿自热焙烧固定化锌浸渣中有害成分的研究

IF 3.8 3区工程技术

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-06-04 DOI: 10.1016/j.cep.2025.110391

Binchuan Li , Xinwei Luan , Xiaoge Wang , Daxue Fu , Yongfeng Chang , Shuang Cui , Kuiren Liu , Xiaocai He , Jianshe Chen , Qing Han

{"title":"Immobilization of hazardous components in zinc leaching residue by autothermal roasting with pyrite","authors":"Binchuan Li , Xinwei Luan , Xiaoge Wang , Daxue Fu , Yongfeng Chang , Shuang Cui , Kuiren Liu , Xiaocai He , Jianshe Chen , Qing Han","doi":"10.1016/j.cep.2025.110391","DOIUrl":"10.1016/j.cep.2025.110391","url":null,"abstract":"<div><div>In this paper, pyrite is innovatively used as sulfur source, and its combustion heat is used to achieve effective detoxification of zinc leaching residue. Realize the treatment of waste with waste. The effects of several factors on the immobilization of hazardous components like Zn, Pb, As, and Cd were systematically investigated. The results show that under the condition of a roasting temperature of 975 °C, roasting time of 2.5 h, sulfur content of 20 %, and air flow of 0.8 m<sup>3</sup>·h<sup>-1</sup>, the leaching concentrations of Zn, Pb, As, and Cd in the roasted residue were 15.9 mg·L<sup>-1</sup>, 0.1 mg·L<sup>-1</sup>, 1.72 mg·L<sup>-1</sup>, and 0.84 mg·L<sup>-1</sup>, respectively, all of which are below the limits of hazardous waste identification standard. Thermodynamic analysis of the pyrite roasting process revealed that the heat generated by its combustion facilitates the roasting process of zinc leaching residue. The combustion product SO<sub>2</sub> can transform PbCO<sub>3</sub> in the leaching residue into PbSO<sub>4</sub>, and Fe<sub>2</sub>O<sub>3</sub> can convert ZnO, ZnS and ZnSO<sub>4</sub> into ZnFe<sub>2</sub>O<sub>4</sub>. PbFe<sub>6</sub>(SO<sub>4</sub>)<sub>4</sub>(OH)<sub>12</sub> transforms to PbSO<sub>4</sub>, Fe<sub>2</sub>O<sub>3</sub> and SO<sub>3</sub>. CdO generates CdFe<sub>8</sub>O<sub>16</sub>Zn<sub>3</sub> after roasting. As is immobilizated in the roasted residue in the form of FeAsO<sub>4</sub>. Magnetic separation was performed on the roasted residue to recover Fe, and the obtained concentrate had an Fe content of 54.20 %. The residue mass decreased by 25.73 % post-roasting, realizing “waste-treats-waste” through sulfur self-consumption and SO<sub>2</sub> fixation.</div></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"216 ","pages":"Article 110391"},"PeriodicalIF":3.8,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144253371","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