Process Safety and Environmental Protection最新文献

{"title":"Electrolytic separation and reuse of cathode materials from discarded lithium-ion batteries","authors":"Jinhui Li ,&nbsp;Yan Wang ,&nbsp;Jie Liu ,&nbsp;Jian Ouyang ,&nbsp;Shudong Xiong ,&nbsp;Ruixiang Wang ,&nbsp;Dezheng Chang ,&nbsp;Yan Gao","doi":"10.1016/j.psep.2025.106972","DOIUrl":"10.1016/j.psep.2025.106972","url":null,"abstract":"<div><div>The end of the service life of electric vehicles, and it is expected that a large number of electric vehicles will enter the phase of scrapping and recycling in the next few years. The precious metals in batteries, if not disposed of properly, pose a threat to the environment and public health. In this study, the roll plating tank used for electroplating was used as a reaction device for the first time. It is adaptable and generates friction to improve electrolysis efficiency. At the same time, a method is proposed to separate cathode materials and aluminum foil under low-voltage conditions, allowing for the preferential recovery of 99 % of Li and resynthesize high nickel cathode materials. The cathode material and aluminum foils were completely peeled off without disaggregation. The effects of electrolysis voltage, electrolyte species, electrolyte concentration, and electrolysis temperature on separating cathode material, aluminum foil, and lithium dissolution were investigated. Under the optimum conditions, the efficiency for dissolution of Mn, Co, and Ni in the electrolyte is not more than 1 %. In comparison, the efficiency for dissolution of Li is more than 99 %, achieving the selective separation of valuable metals. Na₂CO₃ was added to the filtered electrolyte to generate Li₂CO₃, which was then purified to obtain battery-grade Li₂CO₃. The filter residue was acid-leached, and the co-precipitation method synthesized the filtrate after acid-leaching. The ternary precursor was synthesized by solid-phase synthesis with the precursor and battery-grade Li₂CO₃ to prepare a LiNi_0.5Co_0.2Mn_0.3O₂ material with excellent electrochemical performance. The purpose of this study is to provide theoretical and technical support for the electrochemical recovery of ternary cathode materials.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 106972"},"PeriodicalIF":6.9,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Innovative heat source utilisation for calcination in SOFC-driven calcium looping: An exergy and thermodynamic evaluation of afterburner-based calcination for optimal CO2 capture","authors":"Navid Kousheshi ,&nbsp;Ata Chitsaz ,&nbsp;Amirali Nouri ,&nbsp;Ali Saberi Mehr","doi":"10.1016/j.psep.2025.106969","DOIUrl":"10.1016/j.psep.2025.106969","url":null,"abstract":"<div><div>The integration of Solid Oxide Fuel Cells (SOFC) with Carbon Capture technologies has shown promising potential for sustainable energy production and emissions reduction. However, the coupling of Calcium Looping (CaL) with SOFC systems, particularly fuelled by natural gas, remains underexplored. This study investigates two novel configurations of SOFC-CaL integration, leveraging their high-temperature operational compatibility to enhance system efficiency while capturing CO₂. Through rigorous thermodynamic modeling, energy, and exergy analyses, this work provides key insights into system performance and design and practical feasibility. The results reveal that integrating CaL with SOFC systems can achieve up to 95 % CO₂ capture efficiency, significantly reducing CO₂ emissions from 333.2 kg/MWh (basic SOFC setup) to just 26.4 kg/MWh in the most optimised configuration. Total system efficiency improves to 78 %, driven by effective heat recovery from exothermic reactions in the carbonator. However, exergy efficiency slightly declines due to heat transfer challenges and increased irreversibility in high-temperature components such as the afterburner and calciner. A comparative analysis of the two configurations demonstrates that a boosted afterburner design offers superior overall efficiency and CO₂ capture but requires additional fuel consumption. Beyond technical performance, this study highlights the scalability and economic potential of SOFC-CaL systems for decentralised power generation and industrial applications. The integration approach can facilitate cost-effective CO₂ capture and efficient energy recovery, making it a viable candidate for practical deployment. The findings establish a robust framework for future research and provide practical insights into the development of high-performance, economically feasible energy systems aligned with global decarbonisation goals.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 106969"},"PeriodicalIF":6.9,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Feasibility of optimizing olive production: Energy, environmental, and economic aspects","authors":"Abolfazl Hemmati ,&nbsp;Ahmad Tabatabaeifar","doi":"10.1016/j.psep.2025.106996","DOIUrl":"10.1016/j.psep.2025.106996","url":null,"abstract":"<div><div>The objective of this research was to conduct a comprehensive study utilizing a non-parametric method of data envelopment analysis (DEA) to examine the efficiency of olive orchards in order to identify wasteful practices of energy inputs for olive production in the origin of olive in Iran. In addition, the effect of energy input optimization was measured on the improvement of energy indices, greenhouse gas (GHG) emissions rates, and production costs. The results revealed that based on the constant returns to scale model, 30.1 % of orchard gardeners were in the efficient mode of energy consumption, although based on the variable returns to scale model those mentioned above were 63.9 %. The total optimum energy requirement for olive production was found to be 14.1 GJ ha⁻¹, implying that by following the recommendations of this study, 8.7 % of total input energy could be saved while holding a constant level of olive yield. The assessment of environmental pollution has identified chemical fertilizers, electricity, and diesel fuels as the main sources of GHG emissions, and alterations in the pattern of energy consumption can lead to a substantial reduction of 9.2 % in primary GHG emissions. Furthermore, economic analysis discovered the potential for a 3.5 % improvement in both the benefit-to-cost ratio and productivity indices, as well as a 3.4 % reduction in the total cost of olive production.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 106996"},"PeriodicalIF":6.9,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of a novel self-floating and magnetic adsorbent and its enhanced separation of stable forms of Cd from oil and gas field drilling solid waste","authors":"Bing Wang ,&nbsp;Wei Ma ,&nbsp;Yuan Chen ,&nbsp;Yujia Gao ,&nbsp;Guojun Hu ,&nbsp;Guochuan Luo","doi":"10.1016/j.psep.2025.106957","DOIUrl":"10.1016/j.psep.2025.106957","url":null,"abstract":"<div><div>Drilling solid waste (DSW) is a typical byproduct of drilling operations in oil and gas fields. The characteristics of DSW are influenced by both the background soil properties and any added additives. Heavy metal (HM) contamination, particularly cadmium (Cd^2 +), poses a significant environmental challenge due to its toxicity to nearly all living organisms, including plants. DSW samples from the Tarim Oilfield, Xinjiang, China, were analyzed for HM content and its form distribution. The total Cd content was 48 mg/kg, with 41.1 % as unstable HM and 58.9 % as stable HM, exceeding the standard (DB 65/T 3997–2017). Conventional methods for remediating HM-contaminated soil, such as chemical washing and adsorption, are commonly used. X-ray diffraction (XRD) analysis revealed that the DSW has a crystalline carbonate structure, which is disrupted when treated with strong acids. Thus, in this study, a modified self-floating magnetic hollow glass microsphere (FHGM) was employed to remediate HM-contaminated DSW without the use of acidic washing agents. FHGM has a hollow structure, floats within 30 s, and possesses a saturation magnetization near 9, allowing for effective self-flotation and magnetic response, which facilitate its separation from the DSW. The results show that when the solution pH was 8, contact time was 240 min, the dosage of Fe₃O₄ was 0.6 g and the proportion of heavy metals to FHGM= 100:1, the removal efficiency of Cd from DSW using FHGM reached 78.8 %. Notably, the removal rate of HMs from the FeMn and OM fractions was high, indicating that FHGM enhances the migration of stable HMs. Furthermore, using centrifugal force at 17,232 x g, Cd and FHGM were effectively separated, with the material being recycled up to five times, FHGM still retain approximately 73.2 % of their initial adsorption capacities. Therefore, enhanced separation of stable-state Cd from DSW using FHGM presents an effective new treatment technology. The preparation of FHGM also means that it provides a new green and economic treatment method for the remediation of heavy metal pollution in the solid phase (not limited to DSW).</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 106957"},"PeriodicalIF":6.9,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance of nitrogen-fixing bacteria and fungi by water-lifting aerator in drinking water reservoir: Dynamics and co-existence patterns","authors":"Tao Liu ,&nbsp;Jianghao Zhang ,&nbsp;Ziying Zhao ,&nbsp;Kaiwen Liu ,&nbsp;Xiang Liu ,&nbsp;Xiaoyan Liu ,&nbsp;Ben Ma ,&nbsp;Honghong Guo ,&nbsp;Tinglin Huang ,&nbsp;Haihan Zhang","doi":"10.1016/j.psep.2025.106984","DOIUrl":"10.1016/j.psep.2025.106984","url":null,"abstract":"<div><div>Fungi and nitrogen-fixing bacteria play an important role in the conversion of carbon and nitrogen in various environments, but the knowledge gaps regarding their interactions in deep drinking water reservoirs within the water-lifting aerator (WLA) system are still uncleared. The objective of this study was to research the destiny of co-existence patterns between nitrogen-fixing bacteria and fungi. The microbial community structures illustrated obviously spatiotemporal distribution, and the dominant of nitrogen-fixing bacteria in the phylum were Cyanobacteria and Proteobacteria, the fungi were Chytridiomycota and Ascomycota. Mantel test illustrated that the nitrogen-fixing bacteria were strongly correlated with nitrate nitrogen and oxidation-reduction potential, while fungi were related with ammonia nitrogen. The partial least squares path modeling further revealed that nutrients (1.37) significantly influenced the nitrogen-fixing bacteria, meanwhile, the largest stimulation of fungi was physicochemical factors (0.67). The operation of WLA improved the stability of microbial ecosystem and cross-feeding capacity. Furthermore, the investigation could provide a comprehensive understanding of interactions between nitrogen-fixing bacteria, fungi and their potential drivers in drinking water reservoirs during the operation of WLA.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 106984"},"PeriodicalIF":6.9,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143576996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel approach for synergistic capturing of platinum group metals from spent automotive catalysts with Pb-Bi alloy","authors":"Jinfu Li ,&nbsp;Weifeng Song ,&nbsp;Jianfang Lyu ,&nbsp;Mudan Liu ,&nbsp;Peng Chen ,&nbsp;Yong Liu ,&nbsp;Xianjin Lyu ,&nbsp;Zuoyi Yang","doi":"10.1016/j.psep.2025.106923","DOIUrl":"10.1016/j.psep.2025.106923","url":null,"abstract":"<div><div>Considering the substantial environmental and economic benefits, the extraction of platinum group metals (PGMs) from spent automotive catalysts (SAC) attracted significant interest. In this paper, a novel method to extract PGMs by Pb-Bi alloy was proposed. In this process, PbO and Bi₂O₃ are initially employed as collectors to extract PGMs. Subsequently, the Pb-Bi-PGMs alloy undergoes oxidative cupellation to enrich PGMs. The feasibility of Pb-Bi for capturing PGMs was confirmed by calculating the Gibbs free energy. A low-temperature slag system comprising CaO-(SiO₂)_0.66(Al₂O₃)_0.34-FeO was designed. Additionally, the parameters affecting the capture process were systematically investigated. The optimized conditions were: m(CaO)/m(SiO₂) of 1.0, m(SiO₂)/m(Al₂O₃) of 3.00, m(FeO)/m(SiO₂) of 0.8, <span><math><msub><mrow><mi>N</mi></mrow><mrow><mi>C</mi><mo>/</mo><mo>(</mo><mi>P</mi><mi>b</mi><mi>O</mi><mo>+</mo><mi>B</mi><msub><mrow><mi>i</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mn>3</mn></mrow></msub><mo>)</mo></mrow></msub></math></span> of 1.0, 1275 °C for 120 min, collector dosage of 100 wt% with m(PbO)/m(Bi₂O₃) of 1/1. Under these conditions, 99.3 % of Pt, 99.19 % of Pd and 98.8 % of Rh were recovered. Furthermore, the capture process of Pb-Bi alloy for PGMs was analyzed, encompassing metal reduction, metal migration and synergistic capture, as well as alloy settlement. Eventually, oxidative cupellation effectively concentrated the PGMs, resulting in an alloy with maximum concentrations of 7.16 % Pt, 13.69 % Pd, and 3.32 % Rh. In summary, this study presents a novel and efficient strategy for extracting PGMs from SAC, addressing the limitations of traditional methods and offering significant potential for industrial application.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 106923"},"PeriodicalIF":6.9,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation on the inhibition mechanism of thermal runaway propagation in high-rate cycling lithium-ion pouch cells","authors":"Yajun Huang ,&nbsp;Xiongqi Shen ,&nbsp;Yinquan Zhao ,&nbsp;Junling Wang ,&nbsp;Yang Cao ,&nbsp;Wei Bai ,&nbsp;Yu Fan ,&nbsp;Yawei Lu ,&nbsp;Zhirong Wang","doi":"10.1016/j.psep.2025.106975","DOIUrl":"10.1016/j.psep.2025.106975","url":null,"abstract":"<div><div>With the widespread application of lithium-ion batteries (LIBs) and their high-rate charge and discharge technologies, LIBs face significant safety challenges related to thermal runaway (TR) and its propagation during long-term cycling. The study of thermal runaway propagation (TRP) and the inhibition of its spread is crucial to preventing the further escalation of accidents. In this study, a thermal runaway experimental system was established to systematically evaluate the effectiveness of different barrier materials (stainless steel, aerogel blanket, epoxy board, and nickel foam) and material thicknesses (1 mm and 3 mm) in inhibiting the TRP in high-rate cycling lithium-ion pouch cells. The cycle numbers of 3 C high-rate cycling (30, 50, 70, and 100) were used as variables in the experiment, with key data—such as temperature, voltage, mass loss, and heat transfer—being recorded throughout the process of TRP. The infrared imaging and microscopic characterization techniques were employed to analyze the insulation mechanisms of the materials and the internal changes within the batteries. The results indicated that aerogel blanket performed best in inhibiting TRP, especially at a thickness of 3 mm, where it effectively prevented TR in adjacent cell. In contrast, due to its rapid heat transfer properties, nickel foam demonstrated the poorest inhibition effect. The microscopic analysis further revealed the degradation of the battery electrode and surface chemical composition caused by the 3 C high-rate cycling, offering valuable insights for optimizing battery module design and enhancing the safety of energy storage systems. Additionally, a risk matrix analysis was used to assess the reliability of the inhibition strategies, revealing the effectiveness of this method in evaluating safety measures within the LIBs field.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 106975"},"PeriodicalIF":6.9,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A data-driven method for pipeline inhibition efficiency prediction and risk assessment based on MPF-GCA-FPT-FRA approach","authors":"Guoxi He ,&nbsp;Pan Jiang ,&nbsp;Kexi Liao ,&nbsp;Liying Sun ,&nbsp;Hao Qian ,&nbsp;Yu Gu ,&nbsp;Biao Huang","doi":"10.1016/j.psep.2025.106980","DOIUrl":"10.1016/j.psep.2025.106980","url":null,"abstract":"<div><div>At present, inhibitors are widely used in the gathering and transportation pipelines of oil and gas fields. However, existing methods for predicting pipeline inhibition efficiency and conducting risk assessments cannot be promptly carried out on-site.This paper focuses on oil, gas, and multiphase pipelines. Through multiphase flow (MPF) simulation and evaluation experiment of inhibition efficiency, a complete data sample of the influencing factors of inhibition efficiency is formed. Grey relational analysis and principal component analysis (GCA) are combined to determine the main controlling factors of inhibition efficiency. Based on the Frequent Pattern Tree (FPT) algorithm, which is used to mine association rules, a prediction model for inhibition efficiency is established. Finally, a corrosion failure risk assessment (FRA) matrix based on inhibition efficiency is proposed.The results show that multiphase flow simulation can yield 16 accurate flow - parameter results, with a relative error of less than 5 %. The relative error between the inhibition efficiency of 12 experimental groups and that on-site is no more than 12.37 %. Moreover, the inhibition efficiency of TL201 is the highest. The concentration of inhibitor significantly affects the inhibition efficiency of the three types of pipelines. Additionally, flow parameters related to the liquid also have a substantial impact on inhibition efficiency.Based on the data samples containing 3086 mined data points, A total of 3247 association rules for oil, gas, and multiphase pipelines were obtained, and the relative error of the model is ≤ 14.29 %. Meanwhile, the optimal operating conditions for the three types of pipelines are proposed. In accordance with API RP 581–2016, a corrosion failure risk matrix for gathering and transportation pipelines, with inhibition efficiency as the evaluation index, is established. When the proposed method is applied to specific oil, gas, and multiphase pipelines in the TL and ZG oilfields, the application results indicate that this method has good adaptability for oil, gas, and multiphase pipelines.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 106980"},"PeriodicalIF":6.9,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Restraining thermal runaway in lithium-ion batteries: A computational model using mini-channel flow boiling for enhanced safety","authors":"Honglei Ren ,&nbsp;Li Jia ,&nbsp;Liaofei Yin ,&nbsp;Chao Dang ,&nbsp;Zhoujian An ,&nbsp;Zhifeng Chen","doi":"10.1016/j.psep.2025.106983","DOIUrl":"10.1016/j.psep.2025.106983","url":null,"abstract":"<div><div>To ensure the stable and safe operation of the battery and prevent large-scale battery packs from thermal runaway (TR) and explosion accidents, it is of great practical significance to investigate lithium-ion battery thermal safety. In the current research, a computationally efficient model for restraining battery thermal runaway was established by Matlab/Simulink. The model was based on the TR chain reaction affected by temperature and was validated with experimental results. The external short circuit process was characterized by a high rate discharge of 12 C. It was found that there was an obvious difference in internal heat generation during battery TR development. The heat generation between the anode and electrolyte accounted for 26.7 % of the total heat generation, which was the main reason for the development of TR. Meanwhile, a new method for restraining the TR by flow boiling of refrigerant R134a in the cooling plate and restraining the thermal spread by thermal insulation layers was explored. The influence of the parameters of the thermal insulation layers between batteries was discussed. Choosing the material with lower thermal conductivity could help reduce the thickness of the thermal insulation and allow the battery pack to be compact and lightweight. Furthermore, the temperature variation of the core and surface of battery under different mass flow rates and convective heat transfer areas were explored. This work gave new ideas to the collaborative suppression of thermal runaway by heat dissipation and thermal insulation, and was conducive to the long-term safe operation of lithium-ion batteries and significantly reduced the safety risk in engineering applications.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 106983"},"PeriodicalIF":6.9,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143576991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simultaneous oxidation removal of NO and SO2 in simulated flue gas stream via a UV-light/composite oxidant system","authors":"Yan Wang ,&nbsp;Zihan Xiao ,&nbsp;Xinyu Gao ,&nbsp;Yangxian Liu","doi":"10.1016/j.psep.2025.106971","DOIUrl":"10.1016/j.psep.2025.106971","url":null,"abstract":"<div><div>In this work, an ultraviolet light (UV-light)/composite oxidant oxidation system based on an impinging stream absorber has been constructed, and then used for synchronously removing NO and SO₂ in simulated flue gas. The influences of process variables on NO/SO₂ oxidation processes, removal mechanisms, enhancement mechanisms, and macro-kinetics were studied. This system constructed can realize superior simultaneous desulfurization and denitrification efficiency owing to the synergistic effects of composite oxidant under far lower reagent and smaller energy consumption. The simultaneous removal efficiency of 98.9 % for NO and 100 % for SO₂ was achieved in the UV-light/composite oxidant oxidation system, far exceeding the systems induced via a single oxidant. The concentrations of H₂O₂ and S₂O₈^2-, operation temperature, and solution pH value have a dual influence on the NO removal efficiency, and the optimized values are 0.1 mol/L, 0.1 mol/L, 60℃ and 2.48, respectively. The utilization rate of free radicals in liquid phase is greatly improved owing to the interaction between the two oxidants, which is attributed to the crucial role of H₂O₂ as a free radical capture intermediate in this system. For the NO removal, oxidation via hydroxyl radical played the most key role and oxidation via sulfate free radical played a second key role. Oxidation by peroxides played a significant role in SO₂ removal. The NO absorption process in the UV-light/composite oxidant oxidation system was determined to be a pseudo-first-order rapid reaction kinetic characteristic.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 106971"},"PeriodicalIF":6.9,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}