Soil, a complex and dynamic ecosystem, is a vital support system for life on Earth. Soil carbon fractions—from transient, labile forms to persistent recalcitrant pools—play a key role in climate mitigation, soil fertility, and sustainable land management. This review synthesizes current knowledge on soil organic and inorganic carbon fractions' behavior, stability, and ecosystem functioning across climatic gradients and land use types. We evaluate their differential responses to environmental stress and human-induced disturbances, emphasizing their contributions to greenhouse gas dynamics, nutrient cycling, and soil structure. Fraction targeted analysis propose strategic interventions for enhancing soil carbon sequestration and climate resilience in agricultural systems. By realigning/refocusing carbon management around fraction-specific functionality, this review offers a conceptual framework for utilizing soil carbon in environmental and agronomic climate-smart agriculture strategies. This review highlights the relevance of soil carbon fraction management in advancing climate-resilient practices (SDG 13), enhancing sustainable agricultural productivity (SDG 2), and fostering ecosystem restoration and land sustainability (SDG 15).
{"title":"Soil carbon fractions and their role in climate-resilient agriculture: A review","authors":"Meenu Yadav , Rishi Mittal , Anu Kumari , Archna Bhatia , Amita Khatri , Rachna Bhateria","doi":"10.1016/j.scca.2025.100127","DOIUrl":"10.1016/j.scca.2025.100127","url":null,"abstract":"<div><div>Soil, a complex and dynamic ecosystem, is a vital support system for life on Earth. Soil carbon fractions—from transient, labile forms to persistent recalcitrant pools—play a key role in climate mitigation, soil fertility, and sustainable land management. This review synthesizes current knowledge on soil organic and inorganic carbon fractions' behavior, stability, and ecosystem functioning across climatic gradients and land use types. We evaluate their differential responses to environmental stress and human-induced disturbances, emphasizing their contributions to greenhouse gas dynamics, nutrient cycling, and soil structure. Fraction targeted analysis propose strategic interventions for enhancing soil carbon sequestration and climate resilience in agricultural systems. By realigning/refocusing carbon management around fraction-specific functionality, this review offers a conceptual framework for utilizing soil carbon in environmental and agronomic climate-smart agriculture strategies. This review highlights the relevance of soil carbon fraction management in advancing climate-resilient practices (SDG 13), enhancing sustainable agricultural productivity (SDG 2), and fostering ecosystem restoration and land sustainability (SDG 15).</div></div>","PeriodicalId":101195,"journal":{"name":"Sustainable Chemistry for Climate Action","volume":"7 ","pages":"Article 100127"},"PeriodicalIF":5.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Food waste (FW) is a global challenge with profound environmental, economic, and social implications, particularly through its substantial contribution to greenhouse gas (GHG) emissions. This review aims to synthesise evidence on the relationship between FW reduction strategies and climate change mitigation, with a focus on its potential valorisation as bioenergy. A systematic examination of the recent literature was conducted, addressing the composition, physicochemical characteristics, and conversion technologies, including hydrothermal liquefaction, pyrolysis, fermentation, and anaerobic digestion. The findings indicate that FW accounts for up to 8 % of global GHG emissions, predominantly methane, which has a far greater warming potential than CO₂. Reduction and recovery strategies could mitigate millions of tons of CO₂-equivalent annually while generating high-value biofuels. Hydrothermal liquefaction emerges as the most suitable technology for high-moisture FW, with significant potential for yield improvement through pretreatment and catalytic enhancement. The novelty of this review lies in its integration of policy, practice, and technological perspectives into a unified analytical framework, encompassing regulatory instruments, supply chain innovations, and opportunities for developing a circular bioeconomy. In conclusion, reducing FW is not only an ethical imperative but also a practical pathway toward climate change mitigation, offering co-benefits for food security, energy sustainability, and intergenerational equity.
{"title":"Food waste reduction efforts in reducing greenhouse gas emissions and the impact of climate change: A review","authors":"Yeggi Darnas , Emenda Sembiring , Benno Rahardyan , Erdiwansyah","doi":"10.1016/j.scca.2025.100152","DOIUrl":"10.1016/j.scca.2025.100152","url":null,"abstract":"<div><div>Food waste (FW) is a global challenge with profound environmental, economic, and social implications, particularly through its substantial contribution to greenhouse gas (GHG) emissions. This review aims to synthesise evidence on the relationship between FW reduction strategies and climate change mitigation, with a focus on its potential valorisation as bioenergy. A systematic examination of the recent literature was conducted, addressing the composition, physicochemical characteristics, and conversion technologies, including hydrothermal liquefaction, pyrolysis, fermentation, and anaerobic digestion. The findings indicate that FW accounts for up to 8 % of global GHG emissions, predominantly methane, which has a far greater warming potential than CO₂. Reduction and recovery strategies could mitigate millions of tons of CO₂-equivalent annually while generating high-value biofuels. Hydrothermal liquefaction emerges as the most suitable technology for high-moisture FW, with significant potential for yield improvement through pretreatment and catalytic enhancement. The novelty of this review lies in its integration of policy, practice, and technological perspectives into a unified analytical framework, encompassing regulatory instruments, supply chain innovations, and opportunities for developing a circular bioeconomy. In conclusion, reducing FW is not only an ethical imperative but also a practical pathway toward climate change mitigation, offering co-benefits for food security, energy sustainability, and intergenerational equity.</div></div>","PeriodicalId":101195,"journal":{"name":"Sustainable Chemistry for Climate Action","volume":"7 ","pages":"Article 100152"},"PeriodicalIF":5.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145474114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-06-01Epub Date: 2025-01-20DOI: 10.1016/j.scca.2025.100056
K.V. Radha, V.S. Selvi, J. Aarcha
Fresh air is essential for a healthy life but is being polluted due to day-to-day changes in lifestyle. Air purification systems using nanotechnology has started to come into existence providing effective solution at low cost and less energy. The review on investigating the antibacterial and antifungal activity of the synthesised Ag nanoparticles revealed significant amount of antimicrobial activity against airborne pathogens such as Bacillus subtilis, Bacillus megaterium, Staphylococcus aureus, Pseudomonas aeruginosa, Pseudomonas putida, Escherichia coli, Aspergillus niger, Aspergillus ficuum, Rhizopus stolonifer and Phanerochaete chrysosporium were observed. Nanoparticles incorporated membrane is expected to target the contaminants present in the air and treat it effectively. Air filtration studies on the performances of the nanofiber membranes against bacterial and fungal aerosol showed the filtration efficiency and antimicrobial efficiency increased with the Ag nanoparticles amount, and that it decreased with the amount of microbial loading. The actual and theoretical antimicrobial efficiency tests yielded the maximum antibacterial and antifungal efficacy at 98.33 % and 99.86 %, respectively. All these factors prove that the emergence of silver nanofiber membranes as an antimicrobial agent is a promising future for the treatment of air pollution.
{"title":"Silver nanofiber membranes for indoor air pollution treatment","authors":"K.V. Radha, V.S. Selvi, J. Aarcha","doi":"10.1016/j.scca.2025.100056","DOIUrl":"10.1016/j.scca.2025.100056","url":null,"abstract":"<div><div>Fresh air is essential for a healthy life but is being polluted due to day-to-day changes in lifestyle. Air purification systems using nanotechnology has started to come into existence providing effective solution at low cost and less energy. The review on investigating the antibacterial and antifungal activity of the synthesised Ag nanoparticles revealed significant amount of antimicrobial activity against airborne pathogens such as <em>Bacillus subtilis, Bacillus megaterium, Staphylococcus aureus, Pseudomonas aeruginosa, Pseudomonas putida, Escherichia coli, Aspergillus niger, Aspergillus ficuum, Rhizopus stolonifer</em> and <em>Phanerochaete chrysosporium</em> were observed. Nanoparticles incorporated membrane is expected to target the contaminants present in the air and treat it effectively. Air filtration studies on the performances of the nanofiber membranes against bacterial and fungal aerosol showed the filtration efficiency and antimicrobial efficiency increased with the Ag nanoparticles amount, and that it decreased with the amount of microbial loading. The actual and theoretical antimicrobial efficiency tests yielded the maximum antibacterial and antifungal efficacy at 98.33 % and 99.86 %, respectively. All these factors prove that the emergence of silver nanofiber membranes as an antimicrobial agent is a promising future for the treatment of air pollution.</div></div>","PeriodicalId":101195,"journal":{"name":"Sustainable Chemistry for Climate Action","volume":"6 ","pages":"Article 100056"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142689","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}
Pub Date : 2025-06-01Epub Date: 2025-01-22DOI: 10.1016/j.scca.2025.100057
Tanisha Kar , Hari Prakash Veluswamy
Excessive reliance on fossil fuels results in the increasing accumulation of carbon dioxide (CO2) in the atmosphere, contributing to substantial global warming. To mitigate the release of this greenhouse gas, CCUS technology integrates carbon capture, utilization, and storage, providing a comprehensive solution to address the impact of industrial activities on climate change. While numerous experimental-scale CCUS processes are being studied, there is a need to compare their environmental impacts. This paper focuses on the life cycle assessment (LCA) of lab-scale catalysts used in low technology readiness level (TRL) CCUS methodologies, employed to obtain a single target product. It includes a case study of two Cu-based catalysts for the conversion of CO2 into ethanol. Selection of ethanol as the CCU product is due to its prospects as a renewable fuel. Both grid electricity and photovoltaic-based electricity for catalyst synthesis have been used, resulting in a comparative study of four separate product systems. The two catalysts used in this assessment are Cu/C-0.4, and Cu@Na-Beta. Cu/C-0.4 catalyst has Cu nominal loading of 0.4wt%, over carbon support. Cu@Na-Beta consists of embedded 2–5 nm Cu nanoparticles in crystalline particles of Na- Beta zeolite. 17 impact categories were selected for the life cycle impact assessment (LCIA). In all categories, Cu/C-0.4 has more environmental impact than Cu@Na-Beta, indicating that it is environmentally less harmful to synthesize Cu@Na-Beta for CCU applications than Cu/C-0.4 under the studied conditions. Thus this study outlines the method of using LCA for preliminary screening of potential technologies that can be considered for commercial implementation.
{"title":"To nip it or let it bloom: Life cycle assessment of lab-scale catalysts used in low-TRL CCUS technologies","authors":"Tanisha Kar , Hari Prakash Veluswamy","doi":"10.1016/j.scca.2025.100057","DOIUrl":"10.1016/j.scca.2025.100057","url":null,"abstract":"<div><div>Excessive reliance on fossil fuels results in the increasing accumulation of carbon dioxide (CO<sub>2</sub>) in the atmosphere, contributing to substantial global warming. To mitigate the release of this greenhouse gas, CCUS technology integrates carbon capture, utilization, and storage, providing a comprehensive solution to address the impact of industrial activities on climate change. While numerous experimental-scale CCUS processes are being studied, there is a need to compare their environmental impacts. This paper focuses on the life cycle assessment (LCA) of lab-scale catalysts used in low technology readiness level (TRL) CCUS methodologies, employed to obtain a single target product. It includes a case study of two Cu-based catalysts for the conversion of CO<sub>2</sub> into ethanol. Selection of ethanol as the CCU product is due to its prospects as a renewable fuel. Both grid electricity and photovoltaic-based electricity for catalyst synthesis have been used, resulting in a comparative study of four separate product systems. The two catalysts used in this assessment are Cu/C-0.4, and Cu@Na-Beta. Cu/C-0.4 catalyst has Cu nominal loading of 0.4wt%, over carbon support. Cu@Na-Beta consists of embedded 2–5 nm Cu nanoparticles in crystalline particles of Na- Beta zeolite. 17 impact categories were selected for the life cycle impact assessment (LCIA). In all categories, Cu/C-0.4 has more environmental impact than Cu@Na-Beta, indicating that it is environmentally less harmful to synthesize Cu@Na-Beta for CCU applications than Cu/C-0.4 under the studied conditions. Thus this study outlines the method of using LCA for preliminary screening of potential technologies that can be considered for commercial implementation.</div></div>","PeriodicalId":101195,"journal":{"name":"Sustainable Chemistry for Climate Action","volume":"6 ","pages":"Article 100057"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142688","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}
The fuel attributes of Animal Fat biodiesel are thoroughly investigated in this work through the application of the Interpretive Structural Modelling (ISM) technique. The study precisely focuses on the Indian biodiesel manufacturing industry. Eight essential biodiesel properties like water content, viscosity, lubricity, iodine number, flash point, calcific value, and cetane number were considered for the analysis. The ISM technique was used for the result. It was found that the "Lubricity" and "Iodine content" were important factors which plays a good role on affecting the animal fat biodiesel. Also, the study showed that animal fats biodiesel has a good fuel characteristic. These results are much beneficial for researchers and managers who are involved in the biodiesel manufacturing industry. Comprehending the impact of "Lubricity" and "Iodine content" on fuel characteristics enables researchers to focus their endeavors on augmenting these traits. By giving lubricity and iodine concentration top priority, managers can effectively deploy resources and design production processes that maximize the necessary fuel qualities of Animal Fat biodiesel.
{"title":"Characterization of animal fat-based biodiesel fuel in the Indian context for optimized sustainable production and management","authors":"Pradeep Yadav , Madan Jagtap , Prasad Karande , Priyamvada M","doi":"10.1016/j.scca.2025.100082","DOIUrl":"10.1016/j.scca.2025.100082","url":null,"abstract":"<div><div>The fuel attributes of Animal Fat biodiesel are thoroughly investigated in this work through the application of the Interpretive Structural Modelling (ISM) technique. The study precisely focuses on the Indian biodiesel manufacturing industry. Eight essential biodiesel properties like water content, viscosity, lubricity, iodine number, flash point, calcific value, and cetane number were considered for the analysis. The ISM technique was used for the result. It was found that the \"Lubricity\" and \"Iodine content\" were important factors which plays a good role on affecting the animal fat biodiesel. Also, the study showed that animal fats biodiesel has a good fuel characteristic. These results are much beneficial for researchers and managers who are involved in the biodiesel manufacturing industry. Comprehending the impact of \"Lubricity\" and \"Iodine content\" on fuel characteristics enables researchers to focus their endeavors on augmenting these traits. By giving lubricity and iodine concentration top priority, managers can effectively deploy resources and design production processes that maximize the necessary fuel qualities of Animal Fat biodiesel.</div></div>","PeriodicalId":101195,"journal":{"name":"Sustainable Chemistry for Climate Action","volume":"6 ","pages":"Article 100082"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143906500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-06-01Epub Date: 2025-04-26DOI: 10.1016/j.scca.2025.100079
Zhang Bo , Mohd Farid Muhamad Said , Erdiwansyah Erdiwansyah , Rizalman Mamat , Jiang Xiaoxia
Oxygen production as a by-product from renewable energy-based water electrolysis has great potential to support the clean energy transition. This study reviews the efficiency of electrolysis technologies, oxygen applications, and their environmental and economic impacts. Proton exchange membrane (PEM)-based systems show up to 85 % efficiencies, while transition metal catalysts increase efficiencies to 90 %. Integrating solar photovoltaic systems with electrolysis yields 80 % efficiency despite the challenges of power fluctuations. High-purity oxygen from electrolysis has broad applications, including respiratory therapy in the medical field, aeration in wastewater treatment, and more efficient combustion of fossil fuels in the energy sector, all contributing to reduced carbon emissions. In an industrial context, oxygen supports the efficiency of processes such as welding and chemical oxidation. The novelty of this study lies in the in-depth exploration of the economic opportunities and environmental impacts of oxygen as a by-product. The potential for increased revenue from oxygen could accelerate the adoption of green hydrogen technologies. Key challenges include the cost of oxygen storage and the need for more efficient liquid storage technologies. Further research is recommended to improve the modular design of electrolysis reactors and more stable integration with renewable energy systems. By overcoming these barriers, oxygen from water electrolysis could be a significant innovation for sustainability across sectors.
{"title":"A review of oxygen generation through renewable hydrogen production","authors":"Zhang Bo , Mohd Farid Muhamad Said , Erdiwansyah Erdiwansyah , Rizalman Mamat , Jiang Xiaoxia","doi":"10.1016/j.scca.2025.100079","DOIUrl":"10.1016/j.scca.2025.100079","url":null,"abstract":"<div><div>Oxygen production as a by-product from renewable energy-based water electrolysis has great potential to support the clean energy transition. This study reviews the efficiency of electrolysis technologies, oxygen applications, and their environmental and economic impacts. Proton exchange membrane (PEM)-based systems show up to 85 % efficiencies, while transition metal catalysts increase efficiencies to 90 %. Integrating solar photovoltaic systems with electrolysis yields 80 % efficiency despite the challenges of power fluctuations. High-purity oxygen from electrolysis has broad applications, including respiratory therapy in the medical field, aeration in wastewater treatment, and more efficient combustion of fossil fuels in the energy sector, all contributing to reduced carbon emissions. In an industrial context, oxygen supports the efficiency of processes such as welding and chemical oxidation. The novelty of this study lies in the in-depth exploration of the economic opportunities and environmental impacts of oxygen as a by-product. The potential for increased revenue from oxygen could accelerate the adoption of green hydrogen technologies. Key challenges include the cost of oxygen storage and the need for more efficient liquid storage technologies. Further research is recommended to improve the modular design of electrolysis reactors and more stable integration with renewable energy systems. By overcoming these barriers, oxygen from water electrolysis could be a significant innovation for sustainability across sectors.</div></div>","PeriodicalId":101195,"journal":{"name":"Sustainable Chemistry for Climate Action","volume":"6 ","pages":"Article 100079"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-06-01Epub Date: 2025-04-08DOI: 10.1016/j.scca.2025.100068
Nguyen Xuan Hong Quan , Tran Duc Thang , Nguyen Thi Tuyet Nhi , Nguyen Thien Thanh Xuan , Nguyen Phuc Hoang Duy , Ngo Tran Hoang Duong , Nguyen Phuc Thanh Duy , Nguyen Quang Long
Methanation offers a potential option for converting CO2 to green synthetic fuels, providing a solution for reducing carbon emissions. Nickel-based catalysts, promoted with CeO2 and supported on zeolite ZSM-5, were synthesized for CO2 methanation using different impregnation methods, including simultaneous and sequential impregnation of Ce3+ and Ni2+ salts onto the ZSM-5 zeolite (NiCe/ZSM-5, Ni-Ce/ZSM-5, Ce-Ni/ZSM-5). The effects of CeO2 on Ni dispersion and crystallite size on ZSM-5 were investigated, revealing that simultaneous impregnation of Ce3+ and Ni2+ salts onto the ZSM-5 zeolite (NiCe/ZSM-5) leads to a higher effectiveness in creating smaller NiO and CeO2 crystallite sizes compared to sequential impregnation. This approach enhanced Ni dispersion and increasing the basic sites of the catalyst. The samples were characterized using techniques such as X-ray diffraction (XRD), the surface areas and pore volumes measured by N2 adsorption at 77 K (–196 °C), energy-dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), hydrogen temperature-programmed reduction (H2-TPR), and carbon dioxide temperature-programmed desorption (CO2-TPD). The CO2 adsorption capacity at ambient pressure of different samples ranged from 0.31 to 0.48 mmol/g. Catalytic performance was evaluated via CO2 conversion, CH4 selectivity, CH4 yield. Highest results were recorded for NiCe/ZSM-5, with 79.4 % conversion, 98.5 % CH4 selectivity, and 75.6 % CH4 yield at 375–400 °C. At 325 °C, the TOF of NiCe/ZSM-5 (0.319 s⁻¹) is 3.6 times higher than that of Ni/ZSM-5 (0.089 s⁻¹) prepared by the same method. The mechanism of the CO2 methanation process was also proposed.
{"title":"Synergistic effects of Ni and CeO2 on ZSM-5 for enhancement of CO2 methanation at low temperatures","authors":"Nguyen Xuan Hong Quan , Tran Duc Thang , Nguyen Thi Tuyet Nhi , Nguyen Thien Thanh Xuan , Nguyen Phuc Hoang Duy , Ngo Tran Hoang Duong , Nguyen Phuc Thanh Duy , Nguyen Quang Long","doi":"10.1016/j.scca.2025.100068","DOIUrl":"10.1016/j.scca.2025.100068","url":null,"abstract":"<div><div>Methanation offers a potential option for converting CO<sub>2</sub> to green synthetic fuels, providing a solution for reducing carbon emissions. Nickel-based catalysts, promoted with CeO<sub>2</sub> and supported on zeolite ZSM-5, were synthesized for CO<sub>2</sub> methanation using different impregnation methods, including simultaneous and sequential impregnation of Ce<sup>3+</sup> and Ni<sup>2+</sup> salts onto the ZSM-5 zeolite (NiCe/ZSM-5, Ni-Ce/ZSM-5, Ce-Ni/ZSM-5). The effects of CeO<sub>2</sub> on Ni dispersion and crystallite size on ZSM-5 were investigated, revealing that simultaneous impregnation of Ce<sup>3+</sup> and Ni<sup>2+</sup> salts onto the ZSM-5 zeolite (NiCe/ZSM-5) leads to a higher effectiveness in creating smaller NiO and CeO<sub>2</sub> crystallite sizes compared to sequential impregnation. This approach enhanced Ni dispersion and increasing the basic sites of the catalyst. The samples were characterized using techniques such as X-ray diffraction (XRD), the surface areas and pore volumes measured by N<sub>2</sub> adsorption at 77 K (–196 °C), energy-dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), hydrogen temperature-programmed reduction (H<sub>2</sub>-TPR), and carbon dioxide temperature-programmed desorption (CO<sub>2</sub>-TPD). The CO<sub>2</sub> adsorption capacity at ambient pressure of different samples ranged from 0.31 to 0.48 mmol/g. Catalytic performance was evaluated via CO<sub>2</sub> conversion, CH<sub>4</sub> selectivity, CH<sub>4</sub> yield. Highest results were recorded for NiCe/ZSM-5, with 79.4 % conversion, 98.5 % CH<sub>4</sub> selectivity, and 75.6 % CH<sub>4</sub> yield at 375–400 °C. At 325 °C, the TOF of NiCe/ZSM-5 (0.319 s⁻¹) is 3.6 times higher than that of Ni/ZSM-5 (0.089 s⁻¹) prepared by the same method. The mechanism of the CO<sub>2</sub> methanation process was also proposed.</div></div>","PeriodicalId":101195,"journal":{"name":"Sustainable Chemistry for Climate Action","volume":"6 ","pages":"Article 100068"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-06-01Epub Date: 2025-04-18DOI: 10.1016/j.scca.2025.100072
Jinzhi Lu, Hao Wang, Xiao Cai, Yan Zhu
p-Aminophenol is an important intermediate for dyestuff, medical and rubber. Selective hydrogenation of nitrobenzene is a green and environmentally friendly preparation process for the p-aminophenol synthesis. In this review, we first introduce the catalytic performances of a series of catalysts for the selective hydrogenation of nitrobenzene to p-aminophenol. Then the typical reaction pathways of nitrobenzene hydrogenation toward p-aminophenol are proposed. Moreover, various acid reaction systems that can replace sulfuric acid are described. Finally, the existential problems of this reaction and future efforts are pointed out. It is anticipated that the review can provide perspectives on the design rules of highly active and highly selective catalysts for the selective hydrogenation of nitrobenzene to p-aminophenol.
{"title":"Advances in selective hydrogenation of nitrobenzene toward p-aminophenol","authors":"Jinzhi Lu, Hao Wang, Xiao Cai, Yan Zhu","doi":"10.1016/j.scca.2025.100072","DOIUrl":"10.1016/j.scca.2025.100072","url":null,"abstract":"<div><div>p-Aminophenol is an important intermediate for dyestuff, medical and rubber. Selective hydrogenation of nitrobenzene is a green and environmentally friendly preparation process for the p-aminophenol synthesis. In this review, we first introduce the catalytic performances of a series of catalysts for the selective hydrogenation of nitrobenzene to p-aminophenol. Then the typical reaction pathways of nitrobenzene hydrogenation toward p-aminophenol are proposed. Moreover, various acid reaction systems that can replace sulfuric acid are described. Finally, the existential problems of this reaction and future efforts are pointed out. It is anticipated that the review can provide perspectives on the design rules of highly active and highly selective catalysts for the selective hydrogenation of nitrobenzene to p-aminophenol.</div></div>","PeriodicalId":101195,"journal":{"name":"Sustainable Chemistry for Climate Action","volume":"6 ","pages":"Article 100072"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The present work is, for the first time, concentrated on using agricultural cellulose material as a conceivable filler in membranes for CO2/CH4 gas separation. It was possible to fabricate a better membrane with low cost and good permeability (CO2) and selectivity (CO2/CH4). The novel DANC@PEI filler is synthesized from coconut coir fibres, its surface area is very effective for gas separation. The nano-cellulose fibres (NC) were extracted from coconut coir fibres, converted into dialdehyde nano-cellulose (DANC) and functionalized with polyethyleneimine (PEI). The synthesized nano-cellulose filler DANC@PEI (1, 3, 5 wt.%) was incorporated into PSF (Polysulfone). The mixed matrix membranes (MMMs) were characterized by FTIR, TGA, SEM and XRD. The result suggested that for pure and mixed studies, the CO2 permeability in pure gas (12.21 Barrer) and mixed gas (11.35 Barrer) was increased compared to the plain PSF membrane (7.02 Barrer). The selectivity was also significantly increased due to PEI functionalization with DANC, which provides more sites for CO2 sorption, not CH4. From the observation, DANC@PEI nano-cellulose filler is a promising candidate for CO2/CH4 separation.
{"title":"A novel application of nano-cellulose (coconut coir fibres) for the modification of mixed matrix membrane for CO2/CH4 separation","authors":"Ajay Gawali , Sapna Gawali , Snigdha Khuntia , Surendra Sasikumar Jampa , Manish Kumar Sinha","doi":"10.1016/j.scca.2025.100090","DOIUrl":"10.1016/j.scca.2025.100090","url":null,"abstract":"<div><div>The present work is, for the first time, concentrated on using agricultural cellulose material as a conceivable filler in membranes for CO<sub>2</sub>/CH<sub>4</sub> gas separation. It was possible to fabricate a better membrane with low cost and good permeability (CO<sub>2</sub>) and selectivity (CO<sub>2</sub>/CH<sub>4</sub>). The novel DANC@PEI filler is synthesized from coconut coir fibres, its surface area is very effective for gas separation. The nano-cellulose fibres (NC) were extracted from coconut coir fibres, converted into dialdehyde nano-cellulose (DANC) and functionalized with polyethyleneimine (PEI). The synthesized nano-cellulose filler DANC@PEI (1, 3, 5 wt.%) was incorporated into PSF (Polysulfone). The mixed matrix membranes (MMMs) were characterized by FTIR, TGA, SEM and XRD. The result suggested that for pure and mixed studies, the CO<sub>2</sub> permeability in pure gas (12.21 Barrer) and mixed gas (11.35 Barrer) was increased compared to the plain PSF membrane (7.02 Barrer). The selectivity was also significantly increased due to PEI functionalization with DANC, which provides more sites for CO<sub>2</sub> sorption, not CH<sub>4</sub>. From the observation, DANC@PEI nano-cellulose filler is a promising candidate for CO<sub>2</sub>/CH<sub>4</sub> separation.</div></div>","PeriodicalId":101195,"journal":{"name":"Sustainable Chemistry for Climate Action","volume":"6 ","pages":"Article 100090"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-06-01Epub Date: 2025-05-01DOI: 10.1016/j.scca.2025.100084
Sarah Jennings, Sean Craig, Samantha Bryan, Parimala Shivaprasad
Agricultural and horticultural industries across the globe lead to vast quantities of waste, often disposed of indiscriminately both at the point of production and by consumers. These wastes can lead to pollution of local environments and eco-systems, such as those in India affected by the 800 thousand tonnes of floral waste annually. Floral waste is rich in compounds useful in the personal care and pharmaceutical industries, such as terpenoids and other phenolics. These compounds are synthesised and modified by many microorganisms, including Streptomyces, the microorganisms responsible for many anti-cancer and antibiotic drugs used today. Streptomyces species are also known to produce lignocellulolytic enzymes, leading to the degradation of plant matter. This study aims to explore whether Streptomyces can utilise a semi-solid flower media whilst producing industrially useful bioactive compounds from natural floral compounds. Blended flowers in ISP4 media were inoculated with Streptomyces coelicolor M145 and sampled regularly over a 6-week aerobic incubation period. A range of bioactive compounds were identified through GC–MS analysis of the aqueous media, providing evidence that under the correct conditions floral waste has potential as a sustainable feedstock.
{"title":"Study of the potential for Streptomyces coelicolor to produce bioactive compounds from flower waste as a sustainable feedstock","authors":"Sarah Jennings, Sean Craig, Samantha Bryan, Parimala Shivaprasad","doi":"10.1016/j.scca.2025.100084","DOIUrl":"10.1016/j.scca.2025.100084","url":null,"abstract":"<div><div>Agricultural and horticultural industries across the globe lead to vast quantities of waste, often disposed of indiscriminately both at the point of production and by consumers. These wastes can lead to pollution of local environments and eco-systems, such as those in India affected by the 800 thousand tonnes of floral waste annually. Floral waste is rich in compounds useful in the personal care and pharmaceutical industries, such as terpenoids and other phenolics. These compounds are synthesised and modified by many microorganisms, including <em>Streptomyces,</em> the microorganisms responsible for many anti-cancer and antibiotic drugs used today. <em>Streptomyces</em> species are also known to produce lignocellulolytic enzymes, leading to the degradation of plant matter. This study aims to explore whether <em>Streptomyces</em> can utilise a semi-solid flower media whilst producing industrially useful bioactive compounds from natural floral compounds. Blended flowers in ISP4 media were inoculated with <em>Streptomyces coelicolor</em> M145 and sampled regularly over a 6-week aerobic incubation period. A range of bioactive compounds were identified through GC–MS analysis of the aqueous media, providing evidence that under the correct conditions floral waste has potential as a sustainable feedstock.</div></div>","PeriodicalId":101195,"journal":{"name":"Sustainable Chemistry for Climate Action","volume":"6 ","pages":"Article 100084"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}