Process Safety and Environmental Protection最新文献

{"title":"Microwave-assisted hydrothermal carbonization of microalgae grown in swine wastewater: Process optimization and application of hydrochar for dye adsorption","authors":"Adi Kusmayadi ,&nbsp;Yu-Shen Cheng ,&nbsp;Yoong Kit Leong ,&nbsp;Jo-Shu Chang","doi":"10.1016/j.psep.2025.107469","DOIUrl":"10.1016/j.psep.2025.107469","url":null,"abstract":"<div><div>This study presents an eco-friendly approach for converting microalgae cultivated in swine wastewater into value-added hydrochar via microwave-assisted hydrothermal carbonization (MHTC). Process parameters, including temperature, residence time, and biomass-to-water ratio, were optimized using response surface methodology (RSM) based on a Box–Behnken design. The optimal conditions—190 °C, 10 min, and a 7.5 % biomass-to-water ratio—resulted in a maximum hydrochar yield of 58.8 wt%. The resulting hydrochar exhibited a high carbon content (52.83 %) and a higher heating value (23.56 MJ/kg), with well-developed surface functionality and microporous structure, as confirmed by FTIR, SEM, and BET analyses. Its applicability as an adsorbent was demonstrated through batch adsorption experiments targeting methylene blue dye. The hydrochar achieved a maximum adsorption capacity of 107.5 mg/g with a removal efficiency of 87 %. Adsorption data fitted best with the Freundlich isotherm and pseudo-second-order kinetic models, indicating multilayer sorption on a heterogeneous surface. These findings highlight the dual environmental benefit of using swine wastewater as a nutrient source for microalgal cultivation and the subsequent valorization of biomass into functional hydrochar. This work contributes to advancing circular bioeconomy strategies by integrating waste treatment, carbon recovery, and low-cost dye remediation solutions.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"201 ","pages":"Article 107469"},"PeriodicalIF":6.9,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337806","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":"Enhancing Acacia dealbata valorization through microwave-assisted autohydrolysis: An energy-efficient approach to oligosaccharides and bioethanol production","authors":"Álvaro Lobato-Rodríguez ,&nbsp;Beatriz Gullón ,&nbsp;Gil Garrote ,&nbsp;Pablo G. Del-Río","doi":"10.1016/j.psep.2025.107470","DOIUrl":"10.1016/j.psep.2025.107470","url":null,"abstract":"<div><div>Microwave-assisted autohydrolysis (MAA) has gained attention as an alternative to conventional hydrothermal treatment (CHT) to solubilize hemicellulosic-derived compounds, such as oligosaccharides, within shorter residence times. MAA assays were conducted on <em>Acacia dealbata</em> wood, an invasive species, at severities (S₀) ranging from 3.63 to 4.64 to optimize xylooligosaccharides (XO) recovery and assess the enzymatic susceptibility of the spent solids for bioethanol production. S₀ between 3.77 and 4.15 yielded XO concentrations &gt; 9.8 g/L corresponding to a recovery of &gt; 80 % regarding initial xylan. Besides, at S₀= 3.77, a bioethanol yield of 71 % was attained (26.25 g/L). Furthermore, CHT was performed at S₀ values of 3.80 and 4.44 to compare the impact of both heating strategies under optimal conditions for (i) XO production and (ii) higher enzymatic susceptibility of the spent solid. MAA resulted in higher bioethanol yields and, particularly under harsher conditions, lower by-products formation and higher oligosaccharides content. Additionally, MAA consumed 2.60–2.75-fold less energy than CHT.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"201 ","pages":"Article 107470"},"PeriodicalIF":6.9,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337805","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":"Phase diagram-guided synthesis of (NH4)2Mg(SO4)2.6H2O and (KNH4)Mg(SO4)2.6H2O fertilizers from phosphogypsum and reject brine water","authors":"Ilham Oubelhas ,&nbsp;Brahim Bouargane ,&nbsp;Bahcine Bakiz ,&nbsp;Mohamed Ghali Biyoune ,&nbsp;Malak Elmeknassi ,&nbsp;Yassine Taha ,&nbsp;Hamid Ait Said ,&nbsp;Alejandro Barba Lobo ,&nbsp;Juan Pedro Bolívar ,&nbsp;Ali Atbir","doi":"10.1016/j.psep.2025.107463","DOIUrl":"10.1016/j.psep.2025.107463","url":null,"abstract":"<div><div>The brine water discharged by desalination plants has exceptionally high salinity levels and contains various chemical compounds that are harmful to the environment. Concurrently, the phosphate industry releases a substantial quantity of phosphogypsum into marine ecosystems or onto terrestrial surfaces near the manufacturing sites, adversely affecting the soil and aquatic environments. In response to environmental concerns, this study aims to valorize phosphogypsum (PG) waste and reject brine water (RBW) by producing (NH₄)₂Mg(SO₄)₂^.6 H₂O (NMgS) and (KNH₄)Mg(SO₄)₂^.6 H₂O (KNMgS) for use as fertilizers in agriculture. Experimentally, the starting reagents MgSO₄·7 H₂O / K₂SO₄ and (NH₄)₂SO₄ were recovered from RBW and PG by precipitation and the Merseburg process, respectively. Thus, the manufacturing process for NMgS and KNMgS synthesis and crystallization were performed based on the phase diagram data of the two systems Mg²⁺ - NH₄⁺ // SO₄^2- -H₂O and K⁺- Mg²⁺ - NH₄⁺ // SO₄^2- -H₂O at 0 and 25°C. To verify the quality of the prepared products, different complimentary techniques were used (XRD, DTA/DTG, SEM/EDS, and Raman). The obtained results revealed that the produced fertilizers are of high purity and contain elevated levels of soil nutrient elements (i.e., K, N, S and Mg) required for plant growth. It is concluded that the approach applied in this work can help researchers to propose new ways to manage and recycle several wastes using phase diagram equilibrium, facilitating the manufacturing of useful compounds such as fertilizers.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"201 ","pages":"Article 107463"},"PeriodicalIF":6.9,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337808","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":"Exothermicity analyses and energy efficiency of a novel liquid cooling strategy in suppressing thermal runaway propagation of a lithium-ion battery module","authors":"Hanyu Zhao,&nbsp;Xuguang Tang,&nbsp;Lun Li,&nbsp;Junhui Gong,&nbsp;Yuling Xiao","doi":"10.1016/j.psep.2025.107466","DOIUrl":"10.1016/j.psep.2025.107466","url":null,"abstract":"<div><div>Thermal runaway propagation (TRP) within lithium-ion battery (LIB) modules has been extensively explored in existing studies, whereas quantitative analyses of exothermic feature of LIBs during TRP and energy efficiency of the related suppression systems are insufficiently investigated. To challenge this issue, a novel liquid cooling system consisting of six n-shaped cold plates is designed to suppress TRP in a LIB module. Effects of mini-channel width (<em>w</em>, 3–12 mm) of cold plates, coolant flow velocity (<em>u</em>, 0.01–0.03 m/s), and type of coolant (mixture of glycol and water with varying glycol mass fractions of 20 %, 50, 80 %, referred to as GS20, GS50, GS80) on cooling performance are examined by developing a 3D numerical model which is verified by experimental measurements. The results show that <em>u</em>= 0.01 m/s delays onset time and peak temperature of TR but fails to suppress TRP regardless of <em>w</em> and coolant type. With fixed <em>u</em> of 0.02 m/s and GS50, cooling performance can be classified into three regimes: (1) TRP region where 3 mm≤<em>w</em>≤ 6 mm; (2) transition region where 6 mm&lt;<em>w</em>&lt; 8 mm and TRP is partially prevented; (3) Non-TRP region where 8 mm≤<em>w</em>. When <em>u</em>= 0.03 m/s, similar phenomena are observed differing in critical <em>w</em> values. Transient heat release rate (HRR) and total released heat (TRH) of a representative LIB as well as the transient nondimensional concentrations and HRRs of the four elemental components in LIB are calculated to quantitively reveal the exothermicity. HRR of LIB exhibits a bimodal feature with the first small peak contributed by decomposition of SEI and the second main peak being ascribed to the other three reactions. LIB temperature, pressure drop, and a new parameter, energy efficiency factor, are analyzed to identify an optimal cooling solution.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"201 ","pages":"Article 107466"},"PeriodicalIF":6.9,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337807","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":"Hydrophilic modified ZIF-8 embedded two-dimensional vermiculite membrane for oil-water emulsion separation: Super-wettability, performance and mechanisms","authors":"Hong Ma ,&nbsp;Yidan Liu ,&nbsp;Ruiying Zhu ,&nbsp;Dianrui Yang ,&nbsp;Xiaobo Gong ,&nbsp;Meng Zhu ,&nbsp;Yucheng Liu ,&nbsp;Yong Liu","doi":"10.1016/j.psep.2025.107462","DOIUrl":"10.1016/j.psep.2025.107462","url":null,"abstract":"<div><div>With the increasing global water scarcity and people's increasing concern for the environment, the global demand for oily wastewater treatment continues to increase. As one of the most promising technologies, membrane treatment technology is widely used to treat oily wastewater. At present, two-dimensional material membranes are widely used for their unique structure and excellent properties. Here, this study developed a two-dimensional vermiculite (VMT) membrane using hydrophilic tannic acid-modified ZIF-8 (T-ZIF-8) as an intercalating agent to enhance the interlayer spacing and surface roughness of VMT. The optimized cellulose acetate (CA) membrane (T-ZIF-8@VMT/CA) was superhydrophilic and underwater superoleophobic (UWOCA&gt;153°). This membrane achieved a water flux of 2.2 × 10³ L·m⁻² h⁻¹, representing a 20-fold enhancement over the VMT/CA membrane. The T-ZIF-8@VMT/CA membrane showed excellent separation efficiency (up to 99.4 %) for various of oil-in water-emulsions, as well as good separation efficiency (98.4 %) after 3 h long-term operation. Molecular dynamics simulations showed that the modification of T-ZIF-8 could effectively improve the interfacial demulsification and gravity-driven separation of emulsified oils. The T-ZIF-8@VMT/CA membrane had acid and alkali resistance, reusability, and antimicrobial properties. In conclusion, this study demonstrates that the proposed approach can simultaneously enhance water flux and separation effectiveness, showing promising potential for practical applications in real wastewater treatment.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"201 ","pages":"Article 107462"},"PeriodicalIF":6.9,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313359","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":"Strategy to kill two birds with one stone: Contribution of hydrogen-based mineral phase transformation on enhancing the grinding and flotation characteristics of bastnaesite and fluorite","authors":"Pengcheng Tian ,&nbsp;Jian Zhang ,&nbsp;Peng Gao ,&nbsp;Zhidong Tang ,&nbsp;Yanjun Li ,&nbsp;Yuexin Han","doi":"10.1016/j.psep.2025.107464","DOIUrl":"10.1016/j.psep.2025.107464","url":null,"abstract":"<div><div>The close symbiotic relationship between bastnaesite and fluorite complicates their separation. In this study, Hydrogen-based Mineral Phase Transformation (HMPT) is introduced as a novel technology to enhance the grinding efficiency and selective flotation characteristics of bastnaesite and fluorite. The effects of HMPT on the grinding and separation characteristics of these two minerals were evaluated through grinding and flotation tests. The mechanisms by which HMPT affects mineral properties was elucidated using grinding kinetic model, contact angle measurement, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and other methods. The results indicate that HMPT treatment improves the grinding efficiency of bastnaesite more significantly than that of fluorite. After HMPT treatment, the surface hydrophilicity of bastnaesite increased, and noticeable cracks and holes formed, which enhanced bastnaesite’s adsorption capacity for the collector and improved the separation of bastnaesite and fluorite. This provides a new technical theory for the efficient recovery of rare earth elements.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"201 ","pages":"Article 107464"},"PeriodicalIF":6.9,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313471","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":"Seasonal distribution and removal efficiency of microplastics in landfill leachate treatment plants in Istanbul, Turkiye","authors":"Narin Kara,&nbsp;Hanife Sari Erkan","doi":"10.1016/j.psep.2025.107451","DOIUrl":"10.1016/j.psep.2025.107451","url":null,"abstract":"<div><div>Due to inadequate management, plastic waste accumulates in landfills and transforms into microplastics (MPs), which concentrate in leachate and pose risks to ecosystems and human health. This study examines the seasonal variation, size, type, and removability of MPs in leachate from the Kömürcüoda (LTP-1) and Odayeri (LTP-2) landfill leachate treatment plants in Istanbul. Seasonal samples from raw leachate (RL), membrane bioreactor (MBR), ultrafiltration (UF), nanofiltration (NF), and nanofiltration concentrate (NFC) units were analyzed in spring and autumn. The highest MP concentrations were found in MBR units, with 29 particles/L in autumn and 11 particles/L in spring at LTP-1. In LTP-2, MP concentrations in anoxic and aerobic units were 20 and 24 particles/L in autumn and 17 and 26 particles/L in spring. Significant MP reduction was observed in UF and NF outlets, with an MP removal efficiency of approximately 97 % between RL and NF units at both sites. The predominant MPs were blue, black, and transparent fibers, ranging from 500 to 1999 µm in autumn and 1000 to &gt;2000 µm in spring. Polymeric analysis identified polyamide (PA) as the most prevalent material at LTP-1 (42 %), followed by polypropylene (PP) and polyisoprene (PI), while at LTP-2, PP was dominant (46 %), followed by polyethylene (PE), PI, and PA. Despite high removal efficiencies, daily MP release after treatment was estimated at 5 × 10⁵ and 13 × 10⁵ particles for LTP-1 and LTP-2, respectively, indicating continued MP discharge. The high number of MPs detected in untreated landfill leachate, along with their persistence even after treatment processes, highlights the potential accumulation and toxicity risks posed by MPs released into aquatic ecosystems. Further research should focus on understanding the long-term environmental behaviour of these pollutants in receiving environments, as well as on improving advanced treatment technologies for MP removal.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"201 ","pages":"Article 107451"},"PeriodicalIF":6.9,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337811","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 removal of Cr(VI), Cd(II) and As(III) in groundwater by ZVI-biochar based composite: Synergy, performance and mechanism","authors":"Houwei Ji ,&nbsp;Hao Wang ,&nbsp;Qingchun Yang ,&nbsp;Xin Xie ,&nbsp;Dongshuang Wang ,&nbsp;Bin Wu","doi":"10.1016/j.psep.2025.107460","DOIUrl":"10.1016/j.psep.2025.107460","url":null,"abstract":"<div><div>The efficient remediation of multi-heavy metals contaminated groundwater by permeable reactive barrier (PRB) is a global concern due to its importance for human health and ecosystems. However, the development of PRB materials that are high efficiency, low cost and environmentally friendly is still limited. In this paper, a novel composite material consisting of ZVI/biochar/scoria was developed for simultaneous removal of Cr(VI), Cd(II) and As(III) from groundwater, and the batch and column experiments were conducted to assess the synergistic effect, removal efficiency, adsorption mechanism of the composite material. The results showed that when the optimum ratio of ZVI/biochar/scoria was 4:2:1, the simultaneous removal rate of Cr(VI), Cd(II), and As(III) reached 99.25 %, 98.97 % and 95.18 %, respectively. The adsorption of heavy metal ions by ZVI-biochar based composite displayed competitive and selective behaviour in a descending order of Cd(II)&gt;Cr(VI)&gt;As(III). After 44 days of continuous operation, the column adsorption experiments achieved a removal rate of 99.95 %, 90.76 % and 86.72 % for Cr(VI), Cd(Ⅱ) and As(Ⅲ). The composite material exhibited broad pH adaptability (pH 5–9) and resistance to common ions (Cl⁻, SO₄²⁻, Fe^3 +, Mn²⁺, Na⁺ and K⁺), though HCO₃^⁻ significantly inhibited Cr/As removal. The characterization results revealed that the removal mechanisms of the composite for three heavy metals were dominated by reduction and precipitation (Cr(VI)), electrostatic attraction and surface complexation (Cd(II)), and oxidation and co-precipitation (As(III)), respectively. The simultaneous removal of Cr(VI), Cd(II) and As(III) was significantly enhanced by the synergistic effect of Fe-C microelectrolysis, biochar functional groups and scoria adsorption.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"201 ","pages":"Article 107460"},"PeriodicalIF":6.9,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313472","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":"Numerical simulation of hydrogen leakage and accident consequence of hydrogen explosion in compact confined hydrogen-electric coupling systems","authors":"Xuzhi Wang ,&nbsp;Wenbo Li ,&nbsp;Hongxia Zhao ,&nbsp;Min Liu ,&nbsp;Cunman Zhang","doi":"10.1016/j.psep.2025.107444","DOIUrl":"10.1016/j.psep.2025.107444","url":null,"abstract":"<div><div>Previous hydrogen safety research typically focuses on scenarios such as hydrogen refueling stations, garages, and so on, which are usually located in open, semi-open spaces and simply confined spaces. However, the diffusion characteristics of hydrogen leakage and the consequences of accidents in hydrogen-electric coupling system (HECS) within a compact confined space with complex equipment layouts remain unclear. This study evaluates the characteristics of hydrogen leakage, diffusion, and explosion in HECS within a compact confined space based on numerical simulation. The effects of leakage positions, leakage diameters, container sizes, and ventilation outlet layouts on the hydrogen leakage and diffusion characteristics are explored. Furthermore, this study investigates the effects of container size and ventilation outlet positions on reducing explosion hazards, and ultimately determines the optimal container size and ventilation outlet arrangement. The results show that compared to a spacious space, when hydrogen leaks in a congested space, it is blocked by obstacles and accumulates locally. Furthermore, the most severe consequence of hydrogen explosion occurs due to large-scale leakage in the solid-state hydrogen storage system, resulting in an overpressure of 2630 kPa and a damage radius of 25 m. Increasing the container size and incorporating forced ventilation systems effectively reduce the hydrogen concentration and mitigate the consequences of hydrogen explosions. Compared to placing the ventilation outlet on the sidewall, placing it on the top results in higher ventilation efficiency and better safety protection. This study provides valuable insights into the choice of container and the layout of ventilation systems in HECS within the compact confined space.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"201 ","pages":"Article 107444"},"PeriodicalIF":6.9,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313361","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":"Evaluation of the effect of substrate structure on the passive soot oxidation and NOx reduction of DPF coated with SCO-SCR catalyst","authors":"Ying-Jie Chen ,&nbsp;Pi-Qiang Tan ,&nbsp;Xiao-Jie Wang ,&nbsp;Yang Liu ,&nbsp;Kuo Wang ,&nbsp;Xiao-Mei Yang ,&nbsp;Di-Ming Lou ,&nbsp;Zhi-Yuan Hu","doi":"10.1016/j.psep.2025.107458","DOIUrl":"10.1016/j.psep.2025.107458","url":null,"abstract":"<div><div>The application of selective catalytic reduction/oxidation (SCR/SCO) catalysts onto diesel particulate filters (DPF) constitutes a critical strategy for meeting stringent emission regulations. Compared to conventional Cu-SSZ-13 coated on DPF, the novel SCO-SCR integrated DPF (n-SDPF) demonstrates dual functionality in enhancing simultaneous soot combustion and NOx abatement. In this study, a multiphysics model couples factors such as fluid dynamics, mass transfer, chemical reaction and heat transfer was established to assess the impact of substrate structure on soot oxidation and NOx reduction of n-SDPF. Key findings reveal that, SCR catalytic pathways exhibit preferential activation over NH₃ oxidation processes. Enhanced filter wall thickness and extended filter wall length proportionally increase active site density, whereas optimized inlet-to-outlet channel width ratios promote gas-phase reactant charge. When the filter wall thickness increased from 0.25 mm to 0.4 mm, the maximum NOx conversion efficiency increased from 74.76 % to 86.39 %, and the maximum soot oxidation efficiency increased from 15.03 % to 15.83 %. When the filter wall length increased from 140 mm to 200 mm, the NOx conversion efficiency increased from 78.45 % to 88.41 %, and the soot oxidation efficiency increased from 14.62 % to 18.28 %. When the inlet-to-outlet channel width ratio increased from 1 to 1.6, the NOx conversion efficiency decreased from 91.01 % to 77.85 %, and the soot oxidation efficiency decreased from 20.04 % to 14.41 %. Filter wall length extension demonstrates superior technical advantages, achieving improvement in NOx conversion efficiency and enhancement in soot oxidation rates while concurrently reducing pressure drop across both soot cake layers and filter walls. In this study, the coupling relationship between catalytic reaction and substrate structure is revealed. The findings will provide theoretical support for n-SDPF design and practical applications.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"201 ","pages":"Article 107458"},"PeriodicalIF":6.9,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144305016","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}