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Mechanical and microstructural properties of sustainable ternary blended alkali-activated concrete
Next Sustainability Pub Date : 2025-01-01 DOI: 10.1016/j.nxsust.2025.100122
Tejeswara Rao Maganti , Krishna Rao Boddepalli
{"title":"Mechanical and microstructural properties of sustainable ternary blended alkali-activated concrete","authors":"Tejeswara Rao Maganti ,&nbsp;Krishna Rao Boddepalli","doi":"10.1016/j.nxsust.2025.100122","DOIUrl":"10.1016/j.nxsust.2025.100122","url":null,"abstract":"<div><div>In recent years, there has been a surge in interest surrounding alkali activated concrete (AAC), a novel type of concrete praised for its environmental and construction applications. This study focuses on ternary blended alkali-activated concrete (TBAAC) using fly ash, ground granulated blast furnace slag (GGBS), and silica fume as binders. It also aims the replacement of sodium silicate (SS) solution with neutral grade sodium silicate (NGSS) solution with a silica modulus (SiO₂/Na₂O) of 3.12 to improve the fresh and hardened properties of TBAAC. In this context, the effects of silica fume and alkaline activators are studied to determine the optimum mix design and to evaluate the fresh and hardened properties of TBAAC cured under ambient conditions. To investigate the performance of TBAAC, various experiments were carried out to measure its workability, compressive strength, splitting tensile strength, flexural strength, regression analysis and microstructural characteristics. The results show TBAAC of 40 % fly ash, 50 % GGBS and 10 % silica fume resulted in higher mechanical properties, including compressive strength (74.12 MPa), splitting tensile strength (18.46 MPa), and flexural strength (20.45 MPa). The results of the XRD, SEM and EDX analysis show the formation of C-A-S-H, C-S-H, and N-A-S-H gel, indicating a densified matrix with fewer cracks and pore spaces. Furthermore, the Life Cycle Assessment (LCA) results demonstrate that the use of NGSS, with its improved environmental profile, leads to a lower environmental impact, contributing to a significant reduction in the carbon footprint of TBAAC and enhancing the sustainability of construction materials. The findings suggest that using NGSS-based TBAAC is advisable for construction applications, offering practical implications for reducing environmental impact while maintaining high performance in construction projects.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"6 ","pages":"Article 100122"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Advances in carbon dioxide capture and conversion technologies: Industrial integration for sustainable chemical production
Next Sustainability Pub Date : 2025-01-01 DOI: 10.1016/j.nxsust.2025.100108
Okezie Emmanuel , Rozina , Thaddeus C. Ezeji
{"title":"Advances in carbon dioxide capture and conversion technologies: Industrial integration for sustainable chemical production","authors":"Okezie Emmanuel ,&nbsp;Rozina ,&nbsp;Thaddeus C. Ezeji","doi":"10.1016/j.nxsust.2025.100108","DOIUrl":"10.1016/j.nxsust.2025.100108","url":null,"abstract":"<div><div>Developing efficient strategies to capture carbon dioxide (CO<sub>2</sub>) is essential to addressing the escalating challenges of global warming. Despite being a major greenhouse gas, CO<sub>2</sub> holds significant potential as a sustainable feedstock for chemical production. It can serve as a solvent, a preservative, a raw material for producing fuels, carbonates, polymers, and chemicals, and as a recovery agent for processes such as enhanced coal bed methane and oil recovery. This review highlights significant progress made in CO<sub>2</sub> capture and its integration into various industrial applications. While technologies such as adsorption, absorption, membrane separation, and cryogenics have shown promise, challenges related to cost, scalability, and the efficiency of capture and utilization continue to pose significant barriers to widespread adoption. Innovative strategies, including integrated carbon capture and conversion (ICCC) and integrated carbon capture and utilization (ICCU), present promising pathways to reduce costs by combining capture and utilization processes within a single facility. Additionally, catalytic processes and biological systems, such as microalgae and microbial strains (e.g., acetogens), are paving the way for sustainable CO<sub>2</sub> conversion into high-value products. Successful large-scale deployment of these technologies will require sustained interdisciplinary collaboration, robust policy frameworks, and increased investment in research and development. Prioritizing sustainable energy development and management offers the potential to significantly reduce anthropogenic CO<sub>2</sub> emissions while creating useful products. Advancing these technologies will not only help in mitigating climate change but also promote the transition to a circular carbon economy, which aligns with global sustainability goals.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"6 ","pages":"Article 100108"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of glass fiber hybridization and radiation treatment to improve the performance of sustainable natural fiber-based hybrid (jute/glass) composites
Next Sustainability Pub Date : 2025-01-01 DOI: 10.1016/j.nxsust.2025.100104
S.H. Mahmud , S.C. Das , A. Saha , T. Islam , D. Paul , M.W. Akram , M.S. Jahan , M.Z.I. Mollah , M.A. Gafur , R.A. Khan
{"title":"Effect of glass fiber hybridization and radiation treatment to improve the performance of sustainable natural fiber-based hybrid (jute/glass) composites","authors":"S.H. Mahmud ,&nbsp;S.C. Das ,&nbsp;A. Saha ,&nbsp;T. Islam ,&nbsp;D. Paul ,&nbsp;M.W. Akram ,&nbsp;M.S. Jahan ,&nbsp;M.Z.I. Mollah ,&nbsp;M.A. Gafur ,&nbsp;R.A. Khan","doi":"10.1016/j.nxsust.2025.100104","DOIUrl":"10.1016/j.nxsust.2025.100104","url":null,"abstract":"<div><div>The current work aims to utilize sustainable natural fibers such as jute fiber in composite materials and a sustainable technology such as gamma (γ) irradiation to further treat the composites for their performance enrichment. First, synthetic glass fibers were hybridized to improve the performance of natural fiber composites (NFCs) with different stacking sequences. Jute fabrics were used as a natural fiber reinforcement and unsaturated polyester resin was employed as a thermoset polymer matrix. Composite laminates were manufactured by compression molding using a heat press machine. After hybridization, the mechanical properties and water resistance were improved compared to the neat NFCs (i.e., jute fiber composites, J0). The tensile strength, bending strength, tensile modulus, bending modulus, and impact strength were improved to 7–56, 5–53, 21–54, 27–69, and 199–387 %, respectively, than the J0. Further, gamma (γ) irradiation (5.0 kGy) was employed as a sustainable and chemical-free technology to treat the hybrid composite materials and improve the performance, and the optimum improvement was revealed for H3 (G<sub>2</sub>J<sub>4</sub>G<sub>2</sub>) hybrid composites. For H3, the enhancement of tensile, bending and impact strength was revealed at approximately 28, 65 and 27 %, respectively, while the tensile and bending modulus were exhibited at approximately 27 and 71 %, respectively, compared to their non-irradiated composite ones. Further characterization of the composites was studied by FTIR (Fourier Transform Infrared) spectroscopy and SEM (Scanning Electron Microscopy) experimentation.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"6 ","pages":"Article 100104"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficient Phosphorus capture from treated sanitary wastewater using a waste-derived SiO2@FeOOH composite: Robustness, Ca2+ interactions, and recovery perspectives
Next Sustainability Pub Date : 2025-01-01 DOI: 10.1016/j.nxsust.2024.100091
Renan S. Nunes , Gabriela T.M. Xavier , Alessandro L. Urzedo , Pedro S. Fadini , Marcio Romeiro , Wagner A. Carvalho
{"title":"Efficient Phosphorus capture from treated sanitary wastewater using a waste-derived SiO2@FeOOH composite: Robustness, Ca2+ interactions, and recovery perspectives","authors":"Renan S. Nunes ,&nbsp;Gabriela T.M. Xavier ,&nbsp;Alessandro L. Urzedo ,&nbsp;Pedro S. Fadini ,&nbsp;Marcio Romeiro ,&nbsp;Wagner A. Carvalho","doi":"10.1016/j.nxsust.2024.100091","DOIUrl":"10.1016/j.nxsust.2024.100091","url":null,"abstract":"<div><div>Phosphorus uptake and recovery from sanitary wastewater have been considered a promising approach to producing more sustainable fertilizers, in addition to reducing environmental damage caused by the discharge of this nutrient into water streams. In this study, the Phosphorus adsorption/desorption dynamics exhibited by a tailored SiO<sub>2</sub>@FeOOH adsorbent, produced using quartz sand waste and Fe derived from the acid dissolution of scrap iron, were examined. The adsorbent’s behavior, robustness, and interaction with Ca<sup>2+</sup> ions in simulated treated sanitary wastewater were systematically investigated. As a result, the behavior of the adsorbent under controlled conditions was successfully modeled, and relevant interactions between the material and Ca<sup>2+</sup> ions were identified under simulated conditions. The performance of the adsorbent was not affected by the presence of nitrate, carbonate, sulfate, ammonium, fluoride, and humic substances in the simulated media. Additionally, the composite can adsorb humic substances and Phosphorus simultaneously, without interfering with its Phosphorus adsorption capacity. In simulated treated wastewater, the adsorption of the nutrient was enhanced in the presence of Ca<sup>2+</sup>; however, the formation of insoluble Ca/P deposits on the adsorbent surface significantly changed the adsorption dynamics and disturbed the recovery of Phosphorus using the usual alkaline desorption method. The adsorbent exhibited a robust Phosphorus adsorption capacity as high as 40 mg P/g in simulated treated wastewater, showing clear potential for Phosphorus uptake in Wastewater Treatment Plants. Based on the experimental evidence, future perspectives on the final disposal of the spent adsorbent were also discussed within a circular economy framework.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"5 ","pages":"Article 100091"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrochemical urea degradation and energy co-generation using palladium and iron-based catalysts
Next Sustainability Pub Date : 2025-01-01 DOI: 10.1016/j.nxsust.2025.100102
Nivaldo G. Pereira Filho, Victoria A. Maia, Rodrigo F.B. de Souza, Almir O. Neto
{"title":"Electrochemical urea degradation and energy co-generation using palladium and iron-based catalysts","authors":"Nivaldo G. Pereira Filho,&nbsp;Victoria A. Maia,&nbsp;Rodrigo F.B. de Souza,&nbsp;Almir O. Neto","doi":"10.1016/j.nxsust.2025.100102","DOIUrl":"10.1016/j.nxsust.2025.100102","url":null,"abstract":"<div><div>Cyclic voltammetry and in-situ ATR-FTIR spectroscopy experiments revealed that urea oxidation occurs through both faradaic direct and indirect mechanisms. The Pd/C electrocatalyst facilitated the formation of formate and NO<sub>x</sub> species, while Fe/C predominantly promoted formate formation via an indirect pathway, attributed to the high activity of iron in water activation. Polarization and power density curves indicated that both electrocatalysts degraded urea with simultaneous energy co-generation, showing comparable activity. Pd/C achieved a power density of 1.3 mW cm⁻², while Fe/C reached 1.1 mW cm⁻². Although Pd/C demonstrated advantages in reaction kinetics, the significantly lower cost of iron positions Fe/C as a promising alternative for practical applications, particularly in direct urea-fed fuel cell reactors. Additionally, Fe/C exhibited 50 % higher urea consumption near the open circuit potential compared to Pd/C, highlighting its potential for the development of more cost-effective and efficient fuel cell designs.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"6 ","pages":"Article 100102"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143162225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Drought and flood risk mapping using a GIS-based multi-criteria decision method: A case of the Olifants Basin, South Africa
Next Sustainability Pub Date : 2025-01-01 DOI: 10.1016/j.nxsust.2025.100100
Luxon Nhamo , James Magidi , Sylvester Mpandeli , Onisimo Mutanga , Stanley Liphadzi , Tafadzwanashe Mabhaudhi
{"title":"Drought and flood risk mapping using a GIS-based multi-criteria decision method: A case of the Olifants Basin, South Africa","authors":"Luxon Nhamo ,&nbsp;James Magidi ,&nbsp;Sylvester Mpandeli ,&nbsp;Onisimo Mutanga ,&nbsp;Stanley Liphadzi ,&nbsp;Tafadzwanashe Mabhaudhi","doi":"10.1016/j.nxsust.2025.100100","DOIUrl":"10.1016/j.nxsust.2025.100100","url":null,"abstract":"<div><div>Droughts and floods are climate extremes of the same hydrological cycle that need to be studied concurrently. In this age of increasing climate risks and uncertainty, droughts and floods have become the most impactful extreme climate events accounting for about 80 % of loss of human life and 70 % of economic losses in sub-Saharan Africa alone. However, research has tended to study the two climate extremes in isolation. In this study, the Analytic Hierarchy Process (AHP), a Multi-criteria Decision Method (MCDM), together with Geographic Information System (GIS) and geostatistical techniques were used to simultaneously detect and assess drought and flood risks in the Olifants River Basin in South Africa. The drought and flood risk maps were delineated and overlaid on the smallest water management units to identify sub-basins at risk of either drought or flooding. Results indicate that low-lying areas are at risk of floods but can resist drought conditions for long periods as water accumulation allows the soils to retain water for prolonged periods. Whereas high-altitude areas quickly show drought stress as the shallow soils on steep slopes are incapable of retaining water for longer periods but are generally at low risk of floods. The mapped drought and flood risk areas agree with historical and topographic data, and satellite-derived indices related to drought and floods. Understanding the close interactions between drought and floods informs inclusive and holistic strategic policy decisions on disaster risk reduction by enhancing preparedness and proactive interventions to these weather extremes.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"6 ","pages":"Article 100100"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143162671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Recycle sludge incineration ash for efficient preparation of foam concrete: Performance, microstructure, and mechanisms
Next Sustainability Pub Date : 2025-01-01 DOI: 10.1016/j.nxsust.2025.100125
Huang Xuquan , Yuhao , Wang Haojie , Xie Xiuqing , Qi Chunbiao , Xue Fei , Zhao Xiaorong
{"title":"Recycle sludge incineration ash for efficient preparation of foam concrete: Performance, microstructure, and mechanisms","authors":"Huang Xuquan ,&nbsp;Yuhao ,&nbsp;Wang Haojie ,&nbsp;Xie Xiuqing ,&nbsp;Qi Chunbiao ,&nbsp;Xue Fei ,&nbsp;Zhao Xiaorong","doi":"10.1016/j.nxsust.2025.100125","DOIUrl":"10.1016/j.nxsust.2025.100125","url":null,"abstract":"<div><div>In this paper, the performance of producing foamed concrete by sludge incineration ash(SIA), blast furnace slag(BS) and Portland cement(PO) was investigated. The mixture design in Minitab software was employed to conduct three-component experimental design for SIA, BS and PO and to optimize and determine the optimal component ratio. The influence of two admixtures on the compressive strength and dry density of foamed concrete at different ages was explored. The hardening mechanism of foamed concrete was analyzed by XRD and SEM. With the amount of reactant as the variable, the compressive strength of foam concrete was the expected response. The results of Minitab software showed that the regression coefficient between the variable and the response was very high. The R-sq value of the 7-day compressive strength was 95.03 %, and the 28-day compressive strength was 96.34 % (where R-sq represents the accuracy of the model data fitting; the closer to 100 %, the higher the fitting accuracy). The difference between the measured values and the fitting value was small, indicating that the fitting model performed well. The optimal mix ratio was 30.87 % SIA, 28.65 % BS and 40.48 % PO. Under this condition, the maximum compressive strength of foam concrete were 3.60 MPa (7d) and 9.53 MPa (28d), with corresponding dry densities of 1235 kg/m³ and 1252 kg/m³ . Sludge incineration ash exhibits pozzolanic activity. The reactive SiO<sub>2</sub> and active Fe<sub>2</sub>O<sub>3</sub> contained in it can undergo hydration reactions with cement at room temperature, generating C-S-H gel and insoluble AFt phases. These substances interlocked with each other, forming a dense microstructure that provided early strength to the foam concrete. Considering the effect of admixtures on the performance of foamed concrete, the experimental data demonstrated that the addition of polycarboxylic superplasticizer and sodium sulfate-based early strength agent significantly improved the mechanical properties of foamed concrete.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"6 ","pages":"Article 100125"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Halonanoclay-carbon paste composite sustainable electrode for electrochemical oxidation and determination of tryptophan 用于电化学氧化和测定色氨酸的卤烷基粘土-碳浆复合可持续电极
Next Sustainability Pub Date : 2025-01-01 DOI: 10.1016/j.nxsust.2025.100126
Jayant I. Gowda , Rohini M. Hanabaratti , Yuvarajgouda N. Patil , Pandurang D. Pol , Manjunath B. Megalamani , Sharanappa T. Nandibewoor , Adiveppa B. Vantamuri
{"title":"Halonanoclay-carbon paste composite sustainable electrode for electrochemical oxidation and determination of tryptophan","authors":"Jayant I. Gowda ,&nbsp;Rohini M. Hanabaratti ,&nbsp;Yuvarajgouda N. Patil ,&nbsp;Pandurang D. Pol ,&nbsp;Manjunath B. Megalamani ,&nbsp;Sharanappa T. Nandibewoor ,&nbsp;Adiveppa B. Vantamuri","doi":"10.1016/j.nxsust.2025.100126","DOIUrl":"10.1016/j.nxsust.2025.100126","url":null,"abstract":"<div><div>This research aims to develop a sensitive electrochemical technique for detecting and quantifying Tryptophan (TRP), an amino acid, using a carbon paste electrode modified with halonanoclay. The morphology of the prepared electrode was characterized using XRD and SEM techniques. Tryptophan electro-oxidation was investigated primarily using cyclic voltammetry (CV). Systematic studies were conducted to explore the influence of various parameters, such as scan rate, pH, pre-concentration time, modifier quantity, and analyte concentration, on the peak current response of TRP. Tryptophan exhibited an irreversible, well-defined oxidation peak at 0.820 V. Cyclic voltammetry was used to evaluate the effect of scan rate, allowing for the determination of physicochemical parameters, including the heterogeneous rate constant (k⁰) and the number of electrons (n) involved in the electrochemical reaction. Additionally, differential pulse voltammetry was employed to quantitatively analyze pharmaceuticals and human biological fluids. Linearity in detection was observed between 2.0 × 10<sup>-6</sup> M and 50.0 × 10⁻⁶ M, with a limit of detection of 7.77 × 10<sup>–9</sup> M. As a result, the current electrocatalytic method provides a quick, accurate, and simple method to detect TRP in biological medium and pharmaceutical formulations. A sensor with excellent reproducibility, short response times, and outstanding stability has been described as the modified electrode.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"6 ","pages":"Article 100126"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An exergy-based analysis for the synthesis of aromatics from biomass
Next Sustainability Pub Date : 2025-01-01 DOI: 10.1016/j.nxsust.2025.100109
Mohammed Usman , Joseph Akintola , Gabriel Umoh , Joseph Akpan , Ekpotu Wilson , Queen Moses , Philemon Udom , Edose Osagie
{"title":"An exergy-based analysis for the synthesis of aromatics from biomass","authors":"Mohammed Usman ,&nbsp;Joseph Akintola ,&nbsp;Gabriel Umoh ,&nbsp;Joseph Akpan ,&nbsp;Ekpotu Wilson ,&nbsp;Queen Moses ,&nbsp;Philemon Udom ,&nbsp;Edose Osagie","doi":"10.1016/j.nxsust.2025.100109","DOIUrl":"10.1016/j.nxsust.2025.100109","url":null,"abstract":"<div><div>The chemical process industry has been facing rising energy costs, increasing competition due to rapid globalization, and more stringent government regulations amid growing public concern for the environment, health, and safety. In response to these challenges and considering the industry's capital-intensive nature, ongoing optimization through redesigning existing production plants has become a key strategy. This study designs and analyses a typical process plant with two routes for synthesizing aromatics from methanol and pentane. Process route 1 involves co-feeding, while process route 2 incorporates recycling and producing pentane. For methanol synthesis, cellulose (biomass) is used as the initial raw material, leading to the synthesis of aromatics through a reaction with pentanes. Exergy, exergo-economic, and pinch analyses are performed on both process routes. The routes display different overall exergy performances, with process routes 1 and 2 achieving 39.53 % and 25.43 % exergy, respectively. The highest exergetic performance is recorded in the CO<sub>2</sub> heater (67.69 %) and the biomass oxidation reactor (88.70 %) for process routes 1 and 2, respectively. Exergo-economic evaluations indicate that Benzene distillation separation experiences exergy destruction rates of 28.61 % and exergo-economic factor of 99.92 % for process 1, while the aromatics heater shows the highest exergy destruction of 56.68 % for process 2. Implementing heat integration in the process routes reveals that process route 1 achieves energy savings of 92.09 %, while process route 2 results in 51.38 % energy savings. This study demonstrates the two process routes’ long-term economic viability and efficiency, which can be further optimised in future studies to achieve sustainable process implementation.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"5 ","pages":"Article 100109"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143228671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Scalable recycling and characterization of end-of-life solid oxide cell ceramic component materials
Next Sustainability Pub Date : 2025-01-01 DOI: 10.1016/j.nxsust.2025.100110
Gudaysew Tsegaye Yenesew, Clément Nicollet, Eric Quarez, Annie Le Gal La Salle, Olivier Joubert
{"title":"Scalable recycling and characterization of end-of-life solid oxide cell ceramic component materials","authors":"Gudaysew Tsegaye Yenesew,&nbsp;Clément Nicollet,&nbsp;Eric Quarez,&nbsp;Annie Le Gal La Salle,&nbsp;Olivier Joubert","doi":"10.1016/j.nxsust.2025.100110","DOIUrl":"10.1016/j.nxsust.2025.100110","url":null,"abstract":"<div><div>By recycling solid oxide cells (SOCs) end-life materials, the environmental impact can be reduced, and the materials' closed-loop life cycle can help preserve natural resources and create a sustainable and circular system. This study presents a technique for recovering NiO, La<sub>x</sub>Sr<sub>1-x</sub>CoO<sub>3</sub> (LSC) and Zr<sub>1-x</sub>Y<sub>x</sub>O<sub>2-x/2</sub> (YSZ) components from SOC end-of-life products. First, the entire cell components, including the electrolyte, fuel and air electrodes were crushed, ball-milled, and leached with nitric acid. Following the maximum dissolution of cations, centrifugation was used to remove the non-leached YSZ as a sediment. The leached solution, which is rich in nickel, cobalt, strontium, and lanthanum ions was treated with dimethylglyoxime (C<sub>4</sub>H<sub>8</sub>N<sub>2</sub>O<sub>2</sub> DMG) and Ni is preferentially precipitated as C<sub>8</sub>H<sub>14</sub>N<sub>4</sub>NiO<sub>4</sub>. LSC is then recovered from thermal treatment of solution leftover from C<sub>8</sub>H<sub>14</sub>N<sub>4</sub>NiO<sub>4</sub> centrifugation and filtration. About 90 wt% of the ceramic components were successfully recovered. The compositions of recovered materials show a commercial-grade purity i.e about 99 at% for NiO, 96 at% for LSC and 97 at% for YSZ.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"6 ","pages":"Article 100110"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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