Process Safety and Environmental Protection最新文献

{"title":"The consequence distance of liquid ammonia release from a pipeline in complex terrain","authors":"Lin Teng ,&nbsp;Kangkang Wang ,&nbsp;Bin Liu ,&nbsp;Weidong Li ,&nbsp;Pengbo Yin ,&nbsp;Zhenchao Li ,&nbsp;Xin Huang ,&nbsp;Yu Luo ,&nbsp;Lilong Jiang","doi":"10.1016/j.psep.2025.106921","DOIUrl":"10.1016/j.psep.2025.106921","url":null,"abstract":"<div><div>Ammonia is a high-efficiency and safe hydrogen storage medium. Pipeline transport offers significant economic benefits for long-distance ammonia transportation. However, due to ammonia's toxicity, accidental leaks during transportation can lead to catastrophic consequences. Therefore, a comprehensive understanding of the dispersion characteristics of liquid ammonia pipeline leaks is essential for safety measures. Prior studies focused on the ammonia dispersion over flat terrain, leaving a gap in understanding the impact of diverse terrains on dispersion dynamics. This study introduces a computational fluid dynamics model to simulate ammonia dispersion over complex terrain, quantifying the influence of topographical features on dispersion consequence distances. Firstly, validation of the numerical model is conducted using a custom-built open-circuit wind tunnel test platform. Secondly, the dispersion of ammonia is analyzed over six representative terrains, highlighting the influence of complex topographies on the consequence distances. Additionally, the effects of leakage flow rate, atmospheric stability, and leakage direction on dispersion over flat terrain are examined. Finally, a comprehensive assessment of potential risks associated with liquid ammonia pipeline leaks across various terrains is provided by the synthesis and analysis. The results indicate that flat terrain simulations cannot conservatively estimate consequence distances for most terrains. Therefore, incorporating local terrain data in dispersion simulations is recommended to determine the impact area accurately.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106921"},"PeriodicalIF":6.9,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552849","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":"Quantum chemical calculation assisted efficient lithium extraction from lithium precipitation mother liquor via solvent extraction","authors":"Chenquan Ni ,&nbsp;Chang Liu ,&nbsp;Jieyi Wang ,&nbsp;Yuting Liang ,&nbsp;Hui Zhong ,&nbsp;Zhiguo He","doi":"10.1016/j.psep.2025.106925","DOIUrl":"10.1016/j.psep.2025.106925","url":null,"abstract":"<div><div>Recovering lithium from lithium precipitation mother liquor is a challenge for the lithium salt industry to achieve steady development. In this study, we selectively recovered lithium from the mother liquor using solvent extraction, and screened extractants based on lithium affinity using quantum chemical calculation. A β-diketone-organophosphorus synergistic system was screened for lithium extraction. Through a systematic process involving extraction, scrubbing, and stripping, the maximum lithium recovery rate was achieved. After three stages of countercurrent extraction, the lithium extraction rate reached 99.64 %, with a sodium extraction rate of 2.32 %, leaving a lithium concentration of only 6.85 mg/L in the raffinate, demonstrating selective lithium extraction. The stripped solution, when concentrated, yielded a high-purity lithium chloride product. Slope analysis and DFT calculations indicated that the optimal lithium extraction was achieved when the molar concentrations of the extractant and co-extractant were equal. This work provides insights into the sustainable recovery of lithium from lithium precipitation mother liquor.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106925"},"PeriodicalIF":6.9,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518929","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":"Quantitative analysis of carbon footprints and mitigation potential in sustainable electric arc furnace steelmaking routes: A life cycle assessment perspective","authors":"Hang Hu ,&nbsp;Lingzhi Yang ,&nbsp;Guangsheng Wei ,&nbsp;Nanlv Liu ,&nbsp;Shuai Wang ,&nbsp;Feng Chen ,&nbsp;Sheng Yang ,&nbsp;Yufeng Guo ,&nbsp;Tao Jiang","doi":"10.1016/j.psep.2025.106936","DOIUrl":"10.1016/j.psep.2025.106936","url":null,"abstract":"<div><div>The electric arc furnace (EAF) steelmaking route offers a promising pathway for decarbonizing the iron and steel industry (ISI). However, the material-energy consumption and carbon emissions vary significantly depending on the metal charge structure, which complicates carbon accounting and weakens the effectiveness of low-carbon technologies. In this paper, from the life cycle assessment (LCA) perspective, the EAF steelmaking processes under the mixed metal charges of scrap, hot metal (HM), and direct reduced iron (DRI) are concentrated, and the corresponding LCA models and inventories are developed. The life cycle carbon footprints (LCCFs) of four typical scenarios (scrap+HM, DRI+scrap, HM+DRI, HM+scrap+DRI) are quantitatively analyzed and verified. The results reveals the LCCFs of the four scenarios are 439.6–1936.8, 636.7–1484.1, 1656.0–2165.1, and 1006.0–1798.1 kg CO₂, respectively. Among them, HM, DRI and electricity are consistently the major contributors to LCCFs. The scrap has the most significant LCCF reduction effect (77.3 %), followed by DRI (31.5 %). Furthermore, the total CO₂ mitigation potential of China`s ISI during 2020–2060 is predicted through the research results and future steel demand. The findings suggested that reducing the steel production and changing the production structure can both reduce the ISI CO₂ emission, and the largest CO₂ mitigation potential is 62.0 % during 2020–2060. When the ISI is integrated with decarbonization technology (carbon capture, utilization and storage (CCUS), and hydrogen-based DRI), the maximum CO₂ emissions can be reduced from 1850.0 to 484.1 million tons, achieving a maximum emission reduction effect of 73.8 % in the sustainable development scenario. Based on the LCCFs of metallurgical process sub-units and material-energy consumption items, several targeted carbon reduction measures are proposed. To achieve the long-term carbon neutral goal with the CO₂ mitigation potential of above 95 %, more efforts should be focus on innovations of resource-energy structure adjustment and efficiency improvement, smelting process optimization and breakthrough, and large-scale CCUS deployment.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106936"},"PeriodicalIF":6.9,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488764","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 theoretical framework for chemical storage tank pool fire domino effect prevention based on inherent safety concepts","authors":"Xiaoming Gao ,&nbsp;Guohua Chen ,&nbsp;Caiyi Xiong ,&nbsp;Wei Pu ,&nbsp;Kun Hu ,&nbsp;Xiaofeng Li ,&nbsp;Tao Zeng ,&nbsp;Hongpeng Lv ,&nbsp;Lixing Zhou ,&nbsp;Honghao Chen","doi":"10.1016/j.psep.2025.106924","DOIUrl":"10.1016/j.psep.2025.106924","url":null,"abstract":"<div><div>This study aims to establish a theoretical framework using inherent safety concepts to prevent pool fire domino effects during the layout planning stage of chemical storage tank farms. Firstly, the probit and point source thermal radiation models are adopted to capture the accident escalation processes. Then, the principles of dynamic heat radiation synergies are proposed by integrating the thermal radiation intensity at different time steps. Subsequently, Bayesian networks are used to determine the accident topology of domino effects and the failure probabilities of target tanks. Lastly, the failure probabilities are weighted and reconciled using the Analytic Hierarchy Process (AHP) and tank location importance to develop a quantitative risk assessment tool termed Knock-on Risk Index (KRI). The case study demonstrates that the KRI values of alternatives A, B, and C are respectively 2.51E+ 05, 1.95E+ 05, and 2.79E+ 05, implying that alternative B is the inherently safer layout that can be fundamentally resistant to the potential Tank Pool Fire (TPF) domino effects. This work presents a cohesive set of theoretical solutions to preventing the spatial-temporal risks of the TPF domino effects with inherent safety concepts, which can be used to generate a fundamentally safer layout design scheme without adding extensive passive, active, and administrative protections.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106924"},"PeriodicalIF":6.9,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518919","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":"Synthesis of multi-morphology anhydrous MgCO3 from brucite solid waste employing molecular effect on CO2 conversion via biodegradable chelating-system","authors":"Jiayi Liu ,&nbsp;Yulian Wang ,&nbsp;Wanzhong Yin ,&nbsp;Haoran Sun ,&nbsp;Yu Xie ,&nbsp;Bin Yang ,&nbsp;Jin Yao","doi":"10.1016/j.psep.2025.106938","DOIUrl":"10.1016/j.psep.2025.106938","url":null,"abstract":"<div><div>Brucite solid waste generated during mining is challenging to utilize directly and is often discarded, occupying a substantial space and causing environmental damages. This study proposed a novel single-step method for synthesizing anhydrous MgCO₃ via brucite solid waste carbonation with simultaneous carbon dioxide sequestration, aiming to mitigate environmental impact and enhance economic value. The Vitamin C was chosen as it is easily degraded to provide carbon source for mineralization. Results indicated multi-morphology anhydrous MgCO₃ was obtained, and the highest carbon dioxide sequestration rate was 46.7 %. Vitamin C bound Mg^2 + through -OH, inhibiting [Mg(H₂O)₆]²⁺ formation. Degradation-derived organic molecules adsorbed onto crystal surfaces, inducing the oriented growth and assembly of anhydrous MgCO₃. Density functional theory calculations revealed the formation of O-Mg bonds between Vitamin C and Mg²⁺. O-Mg bonds, intermolecular hydrogen bonds, and van der Waals forces exist between organic molecules and anhydrous MgCO₃. This method is anticipated to be an eco-friendly short-process technology for anhydrous MgCO₃ synthesis, with implications for environmental sustainability and carbon utilization strategies. Additionally, anhydrous MgCO₃ exhibits broad application potential in flame retardancy and electronic component enhancement, while the carbon spheres derived from Vitamin C degradation can be recycled for use as electrodes and adsorption materials.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106938"},"PeriodicalIF":6.9,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488984","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":"Biochar remediated algae debris polluted surface sediment: Microbial community inhibited methane fluxes and improved water quality","authors":"Nan Chen ,&nbsp;Songhe Zhang ,&nbsp;Shaozhuang Guo ,&nbsp;Liu Yang ,&nbsp;Tilang Zhang ,&nbsp;Jianfei WanYan ,&nbsp;Jiajia Zhang ,&nbsp;Gang Wu ,&nbsp;Jian Wang","doi":"10.1016/j.psep.2025.106931","DOIUrl":"10.1016/j.psep.2025.106931","url":null,"abstract":"<div><div>Remediation of polluted sediments is important to reduce algal bloom in eutrophic lakes. Biochar with high surface area and great adsorption capacity has been used in pollution control and carbon sequestration. Nevertheless, biochar’s effects on CH₄ emissions and nutrients in algae-contaminated sediment are unclear. In this study, changes in CH₄ emissions, nutrients and microbial communities were investigated in water column containing algae-contaminate sediments covered with 0 (CK) or 1–6 cm of biochar. The results showed that biochar covering improved water quality, decreased nutrients in sediment, and mitigated CH₄ emissions. Compared to CK, biochar covering reduced by about 11.48 %, 24.79 %, 46.43 % and 66.37 % of mean CH₄ fluxes in 1CM, 2CM, 4CM and 6CM treatments, respectively. Furthermore, the average concentrations of NH₄⁺-N, TN and COD in overlying water were 45.86 %-83.10 %, 2.60 %-38.75 % and 22.00 %-51.77 % lower in biochar treatments than in CK, respectively. Considering the experimental effect and economic cost, 4 cm thickness biochar is an ideal choice. PLS-PM analysis showed that biochar changed physical and chemical parameters of water, and thus affecting CH₄ fluxes (<em>p</em> &lt; 0.001). Microbial diversity increased in water and sediment, and phylum Bacteroidota, Actinobacteriota, and Chloroflexi abundance increased but Cyanobacteria abundance reduced in biochar treatment groups compared to CK. Through co-occurrence network, it was found that bacterial interactions were more intricate in sediment than overlying water, and the hub species with low abundance might contribute significantly to maintain microbial community stability. It should be noted that biochar increased the ratio of methanotrophs/methanogens in surface sediments. Functional prediction suggested that biochar promoted C, N and P cycling in sediment and water, and accelerated nutrients mineralization. This study highlights biochar covering can improve water quality, shape microbial community and reduce CH₄ emissions in the short term, and provides useful information for eutrophic lake sediment remediation and management.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106931"},"PeriodicalIF":6.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489037","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":"Influence of calcium formate dosing on early mechanical properties and microstructure of SS-GBFS-DG cementitious materials","authors":"Yongjian Ju ,&nbsp;Siqi Zhang ,&nbsp;Sainan Jia ,&nbsp;Haojing Ba ,&nbsp;Yongchao Zheng ,&nbsp;Wen Ni","doi":"10.1016/j.psep.2025.106935","DOIUrl":"10.1016/j.psep.2025.106935","url":null,"abstract":"<div><div>Steel Slag-Granulated Blast Furnace Slag-Desulfurized Gypsum (SS-GBFS-DG)-based cementitious materials frequently exhibit low early compressive strength. This study examines the impact of calcium formate (CF) on compressive strength, pore distribution, microstructure, and hydration kinetics of these materials. The alkalinity, hydration activity, pore characteristics, and hydration process of (SS-GBFS-DG) in the presence of CF were both qualitatively and quantitatively characterized and evaluated using X-ray fluorescence (XRF), X-ray diffraction (XRD), thermogravimetric-differential thermal analysis (TG-DTA), infrared spectroscopy (IR), mercury intrusion porosimetry (MIP), and heat of hydration analyses, respectively. Results demonstrate that CF significantly improves early compressive strength. Specifically, the 1-day compressive strength of the CC3 group increased by 156 %, reaching 18.81 MPa, whereas the 28-day compressive strength rose by 19.55 %, reaching 75.79 MPa. Microanalytical techniques revealed that CF promotes early hydration reactions in the CC3 and CC5 groups. The addition of CF shortened the induction period by nearly 7 hours, increased the exothermic rate of hydration, improved the formation rate of hydration products such as C-S-H gel and ettringite, accelerated the dissolution of Al³ ⁺, facilitated the breakdown of GBFS, reduced the equilibrium pH, and enhanced the overall hydration process. In the CC3 group, the proportion of pores smaller than 20 nm increased by 9.1 %, whereas the proportion of 20–50 nm less-hazardous pores decreased by 4.9 %, 50–200 nm harmful pores decreased by 3.7 %, and pores larger than 200 nm decreased by 0.5 %. Furthermore, CF improved the Si/Al ratio of C-A-S-H gels. The Si/Al ratios in C-S-H gels at 1 day ranged from 1.5 to 2.0, 1.8–2.3, and 2.0–2.9 for the CC0, CC3, and CC5 groups, respectively. The aluminum released from the breakdown of GBFS was primarily incorporated into ettringite crystals. This study aims to enhance the theoretical framework and control index system for calcium formate in (SS-GBFS-DG) cementitious materials.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106935"},"PeriodicalIF":6.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143528972","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 electrostatic spray technology for control of particulate matter emitted from electron beam flue gas treatment process","authors":"Yong-Hwan Oh ,&nbsp;Sang-Hee Jo ,&nbsp;Jieun Son ,&nbsp;Hui-Bom Jeong ,&nbsp;Seo Hee Seo ,&nbsp;Tae-Hun Kim ,&nbsp;Youn-Suk Son","doi":"10.1016/j.psep.2025.106932","DOIUrl":"10.1016/j.psep.2025.106932","url":null,"abstract":"<div><div>In this study, the efficacy of electrostatic spray technology was assessed for removing particulate matter emitted from flue gas treatment processes utilizing an electron beam. The electron beam treatment of target compounds (NO, NO₂, and SO₂) with additives produced particulate matter. This particulate matter displayed varying number concentration distributions across different particle sizes. The highest number concentration was observed in the 150–250 nm size range. Particulate matter generated from each target compound varied in elemental composition, forming oxidized species that contained oxygen. Increasing the voltage applied to the electrodes of the electrostatic spraying device enhanced the electric field strength, thus charging fine spray droplets of 100 nm diameter emitted from the nozzle. In conditions with low particle number concentration (additive: NaOH, gas: NO and NO₂), even at an applied voltage of 5 kV, high removal efficiencies (ranging from 86.1 % to 96.5 %) were achieved. Under high concentration conditions, which included the treatment of SO₂ with NaOH and all cases with NH₄OH, the removal efficiency peaked at 64 % at 10 kV. When NaOH (0.02 mol/L) was utilized as the electrostatic spray solution, the removal efficiency decreased, yet increasing the applied voltage to 15 kV achieved a removal efficiency of 99.9 %. Enhancements in the applied voltage of the electrostatic spraying device allowed for the treatment of high concentrations of particulate matter generated during the electron beam process and opened up several application possibilities through the modification of the spray solution. These results affirm that electrostatic spraying is a potent technology for treating particulate matter generated in electron beam processes.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106932"},"PeriodicalIF":6.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488929","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":"Experimental and mechanism research on the deflagration characteristics of H2/C2H5OH mixture under non-atmospheric conditions","authors":"Yingquan Qi,&nbsp;Ran Ye,&nbsp;Yong Pan,&nbsp;Jingran Liu,&nbsp;Shanshan Liu,&nbsp;Zhenhua Wang","doi":"10.1016/j.psep.2025.106928","DOIUrl":"10.1016/j.psep.2025.106928","url":null,"abstract":"<div><div>To ensure the safe production and utilization of hydrogen/ethanol fuel, the deflagration characteristics of hydrogen/ethanol mixture at elevated temperature and pressure (TAP) are investigated. The impacts of single factors, including temperature, pressure, fuel concentration, as well as the synergistic effect of TAP on explosion parameters are analyzed. Additionally, a comparative assessment is made based on the explosive pressure hazards posed by hydrogen, ethanol, and the hydrogen/ethanol mixture when subjected to high TAP. The results show that a linear relationship is observed between the initial pressure and the explosion pressure across varying concentrations of hydrogen/ethanol mixture. It is noted that the sum of the individual effects of initial TAP on the explosion pressure of the hydrogen/ethanol mixture is less than the effect of initial pressure alone, but greater than the combined effect of initial TAP. Moreover, the reliability of the NUI mechanism is verified by the laminar burning velocity obtained through the constant volume method. Sensitivity analyses are conducted to elucidate the key elementary reactions and clarify the reaction mechanisms of hydrogen/ethanol mixture. The increase in initial TAP only alters the temperature sensitivity coefficient, while the primary elementary reactions varies with increasing ethanol concentration. Finally, prediction models for predicting the explosion pressure of hydrogen/ethanol mixture at elevated TAP are established based on three algorithms, MLR, KNN and RF, respectively, in which the KNN model has higher predictive ability and better applicability.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106928"},"PeriodicalIF":6.9,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488987","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":"Enhanced hydrogen production through temperature-optimized pyrolysis of mixed plastic waste for sustainable energy recovery","authors":"Daegi Kim ,&nbsp;Seunghyun Lee ,&nbsp;Sun-Young Woo ,&nbsp;Ki Young Park","doi":"10.1016/j.psep.2025.106934","DOIUrl":"10.1016/j.psep.2025.106934","url":null,"abstract":"<div><div>This study examines the pyrolysis of mixed plastic waste (PW) for hydrogen (H₂) and other gas production under controlled temperatures. It analyzes the effects of individual plastics like PET, HDPE, LDPE, PP, and PS on gas composition and yields. Findings reveal those higher temperatures (900–1000 ℃) significantly boost H₂ production, particularly from PET and PS, due to their distinct molecular structures. PET's oxygen-rich composition aids CO and CO₂ generation, whereas PS supports secondary reactions that enhance H₂ output. The diverse makeup of PW leads to balanced gas production, suggesting that pyrolysis is a versatile and sustainable method for managing plastic waste and recovering valuable gases, thus supporting circular economy objectives. The study also highlights the need for optimal pyrolysis conditions that balance efficiency with economic viability, considering the energy costs associated with higher temperatures. Further, the unique properties of plastics in PW, such as PET’s ability to generate CO and CO₂ and the contribution of hydrocarbon-rich plastics like PP and PE to CH₄ and H₂ production, are detailed. PS is noted for producing the highest H₂ yields due to its aromatic structure, which promotes efficient secondary reactions. Future research should focus on catalytic enhancements and scalability for industrial application.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106934"},"PeriodicalIF":6.9,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488988","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}