Sustainable Chemistry for Climate Action最新文献_第2页

Co-generation of hydrogen and ammonia from waste tires valorization through chemical looping approach 用化学循环法从废轮胎气化中热电联产氢和氨

IF 5.4

Sustainable Chemistry for Climate Action

Pub Date : 2025-12-18 DOI: 10.1016/j.scca.2025.100175

Ali A. Al-Qadri , Usama Ahmed , Abdul Gani Abdul Jameel , Haris Ishaq , Umer Zahid

The burgeoning global demand for clean fuels and chemicals presents a formidable challenge, necessitating the development of innovative solutions that can harness waste streams as feedstocks. This comprehensive techno-economic analysis investigates the feasibility of simultaneously generating hydrogen and ammonia from waste tires through the integration of advanced process technologies, offering a compelling pathway to address both energy needs and waste management in a synergistic manner. Three distinct process integration cases were rigorously evaluated: Design 1 leveraged a chemical looping approach to generate the required nitrogen for conventional ammonia generation via the Haber-Bosch process while producing hydrogen from gasification of waste tires; Design 2 seamlessly integrated gasification of tires with steam methane reforming to exploit thermal synergies; and Design 3 pioneered a novel chemical looping for ammonia generation (CLAG) process, which circumvented the energy-intensive air separation and high-pressure Haber-Bosch operations. The results unequivocally demonstrate the superiority of the CLAG-based approach, with Design 3 achieving the lowest levelized cost of ammonia generation at a remarkable $0.41/kg. Design 3 also exisbited the highest cold gas efficiency of 97% and an impressive process efficiency of 63.4%, far exceeding the performance of the other configurations. In contrast, the standalone Haber-Bosch-driven Design 1 exhibited a substantially higher ammonia cost of $0.49/kg, a low cold gas efficiency of 79%, and a process efficiency of only 35%. Overall, the study demonstrates that the Chemical Looping Ammonia Generation (CLAG) configuration (Design 3) is the most efficient and economically competitive route. Design 3 reduces the levelized cost of ammonia to $0.41/kg—representing a 37–43% reduction compared to Designs 1 and 2—while achieving the highest overall process efficiency (63.4%) and cold gas efficiency (97.1%). These results establish CLAG as a superior pathway for waste-tire valorization and a viable alternative to conventional Haber–Bosch–based ammonia production.

全球对清洁燃料和化学品的需求不断增长，这是一个巨大的挑战，需要开发创新的解决方案，利用废物流作为原料。这项全面的技术经济分析研究了通过整合先进的工艺技术，从废轮胎中同时产生氢和氨的可行性，为以协同方式解决能源需求和废物管理提供了一条引人注目的途径。三个不同的工艺集成案例进行了严格的评估：设计1利用化学循环方法，通过Haber-Bosch工艺产生常规氨生成所需的氮，同时从废轮胎气化产生氢气；设计2将轮胎气化与蒸汽甲烷重整无缝结合，发挥热协同效应；设计3开创了一种新的氨生成化学循环（CLAG）过程，它绕过了能源密集型空气分离和高压Haber-Bosch操作。结果明确地证明了基于clag的方法的优越性，设计3实现了最低的氨生成成本，为0.41美元/公斤。设计3还具有最高的97%的冷气效率和令人印象深刻的63.4%的工艺效率，远远超过其他配置的性能。相比之下，独立的haber - bosch驱动的Design 1的氨成本要高得多，为0.49美元/千克，冷气效率低至79%，工艺效率仅为35%。总体而言，研究表明化学环氨生成（CLAG）配置（设计3）是最有效和最具经济竞争力的路线。设计3将氨的平均成本降低到0.41美元/公斤，与设计1和设计2相比，降低了37-43%，同时实现了最高的整体工艺效率（63.4%）和冷气效率（97.1%）。这些结果确立了CLAG作为废轮胎增值的优越途径和传统的haber - bosch制氨的可行替代方案。

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引用次数: 0

Integrated biorefinery approaches for the sustainable valorization of agricultural residues into biofuels, bioplastics, and bioactive compounds 综合生物精炼方法为农业残留物的生物燃料，生物塑料和生物活性化合物的可持续增值

IF 5.4

Sustainable Chemistry for Climate Action

Pub Date : 2025-12-12 DOI: 10.1016/j.scca.2025.100173

S. Gautam , B. Bora , D. Dutta , A.D. Tripathi , J. Srivastava , H.N. Thatoi , S.K. Srivastava , S.M. Khade , S.R. Geed

More than 5.5 billion tons of agricultural waste are generated every year globally, presenting major environmental issues and offering enormous potential as renewable bioresources. This review discusses an integrated assessment of various biorefinery-based strategies for the sustainable valorization of agricultural waste into biofuels, bioplastics and bioactive compounds. The discussion covers thermochemical, biochemical and hybrid biotechnological pathways, including fermentation, Solid- State Fermentation, pyrolysis and hydrothermal liquefaction with special emphasis on system-level optimization for resource efficiency. Microbial and enzymatic valorization by Bacillus licheniformis and Aspergillus niger showed 1321 ± 13 U/mL protease and 9.6 ± 0.76 IU/gds cellulase, respectively, thereby justifying the feasibility of enzyme-driven conversions. Thermochemical processes resulted in a yield of up to 20.6 wt% bio-oil with a heating value of 17.23 MJ/Nm³, whereas the products obtained through integrated fermentation processes are 0.703 g/g ethanol from sugar beet pomace and 18.9 ± 0.3 g/L ethanol from spent coffee grounds. Next-generation nanobiocatalytic and hybrid thermo-biochemical systems enhanced conversion efficiency by 25–30 %, enabling the realization of scalable circular biorefineries. Techno-economic assessments and life cycle analyses indicate that greenhouse gas emissions can be reduced by up to 90 percent compared to conventional fossil-based alternatives. Review highlights the urgent need for the development of integrated multi-product biorefinery systems to facilitate the transition from agricultural waste to high-value bioproducts, aligning with the principles of a circular bioeconomy.

全球每年产生的农业废弃物超过55亿吨，带来了重大的环境问题，但作为可再生生物资源具有巨大潜力。这篇综述讨论了各种基于生物炼制的农业废弃物可持续增值为生物燃料、生物塑料和生物活性化合物的综合评估。讨论涵盖热化学，生物化学和混合生物技术途径，包括发酵，固体发酵，热解和水热液化，特别强调系统级优化资源效率。地衣芽孢杆菌和黑曲霉的微生物和酶促转化分别显示1321±13 U/mL蛋白酶和9.6±0.76 IU/gds纤维素酶，从而证明酶驱动转化的可行性。热化学工艺的生物油产率高达20.6 wt%，热值为17.23 MJ/Nm³，而通过综合发酵工艺获得的产品从甜菜渣中获得0.703 g/g乙醇，从废咖啡渣中获得18.9±0.3 g/L乙醇。下一代纳米生物催化和混合热生化系统将转化效率提高了25 - 30%，实现了可扩展的循环生物炼制。技术经济评估和生命周期分析表明，与传统的化石燃料替代品相比，温室气体排放可减少高达90%。审查强调迫切需要开发综合多产品生物炼制系统，以促进从农业废物到高价值生物产品的过渡，符合循环生物经济的原则。

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引用次数: 0

Spatial and Temporal trends of future meteorological variables for 21st century over India: Approach with CMIP6 climatic models 21世纪印度未来气象变量的时空趋势：基于CMIP6气候模式的方法

IF 5.4

Sustainable Chemistry for Climate Action

Pub Date : 2025-12-09 DOI: 10.1016/j.scca.2025.100170

Anusha C Rajesh, Ashitha Mariya Shaji, Adhithya P B, Haripriya H, Rema K P, Kanthavel P

Climate change causes meteorological variables to become more erratic and severe, especially in regions like India, which face high climate change risk and are particularly vulnerable to these changes. In this study, changes in future meteorological variables (precipitation, max and min temperature) simulated from CMIP6 climatic models under four shared socioeconomic pathway scenarios (SSP126, SSP245, SSP370 and SSP585) were evaluated. Modified Mann-Kendall (MMK) test and Sen’s slope test was used to study trend pattern for the entire India for four different climatic seasons (Monsoon, Autumn, Winter and Summer). The study found that, precipitation and temperature projected increasing trend for all the SSPs for the 21^st century. Particularly, SSP 585 projected relatively more increase than the other scenarios. SSP 585 scenario showed relatively high increase in monsoon rainfall (0.0413 mm per monsoon season) as well as variability in the pattern of rainfall (C.V. = 27 %). Projected Monsoon and Autumn seasons witnessed more rainfall. In region specific analysis, Western region of India showed relative decrease in rainfall than rest of the nation while observing spatial variability. Over all, remarkable variation of meteorological variable trend between different regions as well as seasons was witnessed over the considered timespan. Findings of this study would prove helpful to adapt region and season specific climate change adaptation strategies for the country.

气候变化导致气象变量变得更加不稳定和严重，特别是在印度等地区，这些地区面临着高气候变化风险，特别容易受到这些变化的影响。本文对CMIP6气候模式在SSP126、SSP245、SSP370和SSP585 4种共享社会经济路径情景下的未来气象变量（降水、最高气温和最低气温）变化进行了评估。采用修正Mann-Kendall （MMK）检验和Sen’s slope检验研究了整个印度四个不同气候季节（季风、秋、冬、夏）的趋势模式。研究发现，降水和温度预测了21世纪所有ssp的增加趋势。特别是，ssp585预测的增长相对于其他情景更大。SSP 585情景显示季风降雨相对较高的增加（每个季风季节0.0413毫米）以及降雨模式的变化（C.V. = 27%）。预计季风和秋季将有更多降雨。在区域具体分析中，在观察空间变异性时，印度西部地区的降雨量比全国其他地区相对减少。总体而言，在考虑的时间跨度内，不同地区和季节之间的气象变量趋势变化显著。本研究的结果将有助于为该国调整特定区域和季节的气候变化适应战略。

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引用次数: 0

Thermal performance and flue gas emission analysis of biomass combustion chamber for small-scale brick production 小型制砖生物质燃烧室热工性能及烟气排放分析

IF 5.4

Sustainable Chemistry for Climate Action

Pub Date : 2025-12-08 DOI: 10.1016/j.scca.2025.100169

Iqbal , Erdiwansyah , Muhammad Faisal , Mahyuddin , Muhtadin , Mohd Fairusham Ghazali , Rizalman Mamat

The brick manufacturing industry is one of the most energy-intensive sectors and a significant contributor to air pollution, primarily due to its reliance on coal and diesel fuels. This study examines the thermal performance and flue gas emissions of a biomass combustion chamber, specifically designed for small-scale brick production, to address this environmental challenge. The objective is to evaluate combustion efficiency, heat distribution, and pollutant emissions while comparing the system's performance with conventional coal-based systems. The combustion chamber was experimentally tested using real-time data acquisition systems to monitor temperature profiles, heat flux, and emissions of CO, CO₂, NOₓ, SO₂, and particulate matter (PM₂.₅). Results showed that the chamber achieved a peak temperature of 1140 °C, a maximum heat transfer coefficient of 270 W/m²·K, and a heat flux of 320 kW/m². The optimal combustion efficiency reached 97 % at an air-fuel ratio (λ) of 1.8 with biomass moisture content below 10 %. Emission measurements revealed significantly lower values compared to conventional systems, with CO at 85 mg/m³, NOₓ at 45 mg/m³, SO₂ at 8 mg/m³, and PM₂.₅ at 25 mg/m³. These findings demonstrate the system’s compliance with international environmental standards. The novelty of this work lies in its integrated design approach, tailored for small-scale brick kilns, which combines optimised geometry, air staging, and thermal analysis. In conclusion, the study confirms that biomass-based combustion chambers offer a technically viable and environmentally sustainable alternative to fossil-fueled systems in the brick manufacturing sector.

砖制造业是能源密集程度最高的行业之一，也是造成空气污染的重要因素之一，主要原因是它依赖煤炭和柴油燃料。本研究考察了专门为小规模砖生产设计的生物质燃烧室的热性能和烟气排放，以应对这一环境挑战。目的是评估燃烧效率、热量分布和污染物排放，同时将该系统的性能与传统的煤基系统进行比较。使用实时数据采集系统对燃烧室进行了实验测试，以监测温度分布、热流密度以及CO、CO₂、NOₓ、SO₂和颗粒物（PM₂.₅）的排放。结果表明，实验室内的峰值温度为1140℃，最大换热系数为270 W/m²·K，热流密度为320 kW/m²。当空气燃料比（λ）为1.8，生物质含水率低于10%时，燃烧效率达到97%。排放测量结果显示，与传统系统相比，CO为85 mg/m³，NOₓ为45 mg/m³，SO₂为8 mg/m³，PM₂显著降低。5在25mg /m³下运行。这些调查结果表明，该系统符合国际环境标准。这项工作的新颖之处在于它的综合设计方法，为小型砖窑量身定制，结合了优化的几何形状，空气分级和热分析。总之，该研究证实，生物质燃烧室在砖制造领域为化石燃料系统提供了技术上可行且环境可持续的替代方案。

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引用次数: 0

Utilization of vegetable waste compost to improve nutrient availability and boost Pakcoy (Brassica chinensis L.) growth on nutrient deficient Alfisols 利用蔬菜废弃物堆肥提高养分有效性，促进油菜在营养缺乏的苜蓿上生长

IF 5.4

Sustainable Chemistry for Climate Action

Pub Date : 2025-12-07 DOI: 10.1016/j.scca.2025.100171

Kasifah Kasifah , Amanda Patappari Firmansyah , Muhammad Roil Bilad

Alfisol soils exhibit inherent nutrient deficiencies, posing challenges for sustainable agriculture and climate resilience. This study evaluates the efficacy of vegetable waste compost as a sustainable soil amendment to enhance soil quality and improve the growth of pakcoy (Brassica chinensis L.), reducing reliance on synthetic fertilizers. A greenhouse experiment was conducted using four compost dosages (0, 10, 20, 30 t/ha). The highest compost application rate (30 t/ha) significantly increased plant height (from 14.2 cm in control to 15.8 cm) and shoot fresh weight (from 10.7 g in control to 20.5 g), indicating that the 30 t/ha treatment performed substantially better than the untreated control in improving nutrient availability, soil structure, and overall plant productivity. The gradual nutrient release from compost reduced the environmental risks associated with synthetic fertilizer leaching, aligning with circular economy principles. This study highlights the role of organic waste recycling in fostering sustainable soil management and mitigating climate change impacts. Future research should explore large-scale field applications and economic viability to facilitate broader adoption of compost-based soil enrichment strategies.

Alfisol土壤表现出固有的营养缺陷，对可持续农业和气候适应能力构成挑战。本研究评价了蔬菜废弃物堆肥作为一种可持续土壤改良剂在提高土壤质量和促进白菜生长、减少对合成肥料依赖方面的效果。采用4种堆肥用量（0、10、20、30 t/ha）进行了温室试验。最高堆肥施用量（30 t/ha）显著提高了株高（从对照的14.2 cm增加到15.8 cm）和茎鲜重（从对照的10.7 g增加到20.5 g），表明30 t/ha处理在改善养分有效性、土壤结构和植物整体生产力方面明显优于未处理的对照。堆肥中养分的逐渐释放减少了与合成肥料浸出相关的环境风险，符合循环经济原则。本研究强调了有机废物回收在促进可持续土壤管理和缓解气候变化影响方面的作用。未来的研究应探索大规模的田间应用和经济可行性，以促进堆肥土壤富集策略的广泛采用。

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引用次数: 0

Facile synthesis of MIL-101(Cr) for enhanced gas sorption at room temperature 室温下MIL-101（Cr）的快速合成及气体吸附性能

IF 5.4

Sustainable Chemistry for Climate Action

Pub Date : 2025-12-07 DOI: 10.1016/j.scca.2025.100172

Sitaram Meduri, Jalaiah Nandanavanam

Among the several metal organic frameworks (MOFs) investigated for gas sorption applications, MIL-101(Cr) stands as a potential material due to its superior pore characteristics. The commonly used modulator for its synthesis was hydrofluoric acid (HF), a highly corrosive and toxic reagent. Of the several modulators explored for replacing the HF, acetic acid and nitric acid are considered advantageous, as they offer high yield and better pore characteristics. This study aims to understand the role of a modulator on (i) structural properties and (ii) gas adsorption of MIL-101(Cr). Towards this, acetic acid and nitric acid were employed as modulators. The synthesized samples were characterized using various tools and examined for their adsorption performance of different gases (CO₂, CH₄, H₂, and water vapour) at 25°C temperature. Incorporating a modulator during the synthesis of MIL-101(Cr) helped achieve higher crystallinity and more open metal sites (OMS) resulting in enhanced gas sorption. Under the tested conditions, the nitric acid-based sample exhibited CO₂, CH₄, H₂, and water vapour adsorption capacities of 439.86, 183.08, 43.56, and 1384.96 cm³ g^-1, respectively. This is attributed to its higher crystallinity, higher chromium content, and smaller pore diameter. Overall, this study elucidates the role of the modulator and correlates effectively the underlying chemistry on the sorption capacities of various gases.

在研究气体吸附应用的几种金属有机框架（mof）中，MIL-101（Cr）由于其优越的孔隙特性而成为一种潜在的材料。其合成常用的调制剂为氢氟酸（HF），这是一种腐蚀性强、毒性大的试剂。在几种用于取代HF的调节剂中，醋酸和硝酸被认为是有利的，因为它们具有高收率和更好的孔隙特性。本研究旨在了解调节剂对MIL-101（Cr）的结构性质和气体吸附的作用。为此，采用醋酸和硝酸作为调节剂。利用各种工具对合成的样品进行了表征，并在25°C温度下测试了它们对不同气体（CO2, CH4， H2和水蒸气）的吸附性能。在MIL-101（Cr）的合成过程中加入调制剂有助于获得更高的结晶度和更多的开放金属位点（OMS），从而增强气体吸附。在测试条件下，硝酸基样品对CO2、CH4、H2和水蒸气的吸附量分别为439.86、183.08、43.56和1384.96 cm3 g-1。这是由于它的结晶度高，铬含量高，孔径小。总的来说，这项研究阐明了调制器的作用，并有效地将各种气体的吸收能力与潜在的化学反应联系起来。

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引用次数: 0

CO2 separation technologies: Clean energy solutions for greening environment 二氧化碳分离技术：绿色环境的清洁能源解决方案

IF 5.4

Sustainable Chemistry for Climate Action

Pub Date : 2025-12-02 DOI: 10.1016/j.scca.2025.100168

Md. Sadman Anjum Joarder , Md. Farial Kabir , Md. Hasibul Hasan , Md. Shafikul Islam , Ahmad Kutub

Industrialization and population growth have increased fossil fuel use, leading to rising carbon dioxide (CO₂) emissions and a greater emphasis on carbon capture technologies, particularly CO₂ separation techniques. Carbon dioxide separation technologies (CSTs) are viable and promising technologies that lower CO₂ emissions from industrial processes and fossil fuel-based power plants. They are essential for fostering a greener future. This paper reviews key CSTs—membrane separation, adsorption, absorption, cryogenic separation, and chemical looping—with emphasis on their applicability, advantages, and limitations. This paper also provides a detailed study of CSTs with their respective operating and maintenance costs, effectiveness, scalability, environmental impact, and promises for future efficiency at the typical temperature, pressure, and composition of flue gases. Furthermore, the challenges associated with incorporating CO₂ separation technologies into the current infrastructure are covered in this study, as well as providing an avenue to improve their performance and feasibility. In conclusion, this paper outlines potential avenues for further study that might spur innovation and hasten the worldwide adoption of CO₂ separation technology.

工业化和人口增长增加了化石燃料的使用，导致二氧化碳（CO2）排放量增加，并更加强调碳捕获技术，特别是二氧化碳分离技术。二氧化碳分离技术（CSTs）是一种可行且有前景的技术，可以降低工业过程和化石燃料发电厂的二氧化碳排放。它们对于培育更绿色的未来至关重要。本文综述了膜分离、吸附、吸收、低温分离和化学环等关键技术，重点介绍了它们的适用性、优点和局限性。本文还详细研究了CSTs及其各自的运行和维护成本、有效性、可扩展性、环境影响以及在典型温度、压力和烟气成分下的未来效率。此外，本研究还涵盖了将二氧化碳分离技术纳入现有基础设施所面临的挑战，并提供了提高其性能和可行性的途径。总之，本文概述了进一步研究的潜在途径，这可能会刺激创新并加速全球采用二氧化碳分离技术。

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引用次数: 0

Upcycling of palm fronds and expanded polystyrene waste for producing liquid fuels with enhanced octane rating 棕榈叶和膨胀聚苯乙烯废料的升级再造，以生产提高辛烷值的液体燃料

IF 5.4

Sustainable Chemistry for Climate Action

Pub Date : 2025-12-02 DOI: 10.1016/j.scca.2025.100167

Dieni Mansur , Wido Lesar Ignasius Purba , Alisyah Putri Desvi Takahasi

Expanded polystyrene (EPS) waste from food containers and protective packaging poses a significant threat to the environment. Similarly, palm fronds (PF), which are byproducts of oil palm plantations, are often left to decompose after harvesting. Both EPS and PF serve as potential raw materials for energy production. Co-pyrolysis, a process that utilizes EPS waste and PF together, is a promising method for advancing the circular economy. This research aimed to analyze the composition of the light fraction of pyrolysis oil and to evaluate the effective use of this light fraction to enhance the research octane number (RON) of gasoline. The co-pyrolysis process was conducted using various mass ratios of PF to EPS as 10:90, 82:18, and 90:10 at temperatures of 300, 400, and 500 °C in a bench-scale unit with an 8-liter reactor capacity for feed. Under various temperatures and mass ratios of PF to EPS, the yield of pyrolysis oil ranged from 9.67 to 83.12 wt.%. To separate the light fraction around the gasoline boiling point, the pyrolysis oil was treated with a rotary vacuum evaporator. A higher amount of light fraction was produced from pyrolysis oil with a PF to EPS mass ratio of 10:90. The separated light fraction consisted of two phases: an oil phase and an aqueous phase. The yields of the oil phase were 39.99 %, 45.17 %, and 42.50 % for pyrolysis oil produced at 300, 400, and 500 °C, respectively. The oil phase of the light fraction was analyzed using gas chromatography-detailed hydrocarbon analysis (GC-DHA) to predict its research octane number (RON). The oil phase produced from a PF to EPS mass ratio of 10:90 at 300 °C had a higher RON value of 106. This oil phase contained 98.41 % monoaromatic hydrocarbons, with the main chemical compounds being 44.0 % styrene, 27.9 % ethylbenzene, and 16.6 % α-methylstyrene. Incorporating 5 % by volume of this oil phase into 95 % gasoline increased the RON from 90.0 to 91.5. In line with the principles of a circular economy, the presence of EPS waste and palm fronds—currently underutilized materials—is reduced and repurposed in the energy sector. This is achieved through the co-pyrolysis process, followed by the separation of lighter fractions for liquid fuel application.

来自食品容器和保护性包装的膨胀聚苯乙烯（EPS）废物对环境构成重大威胁。同样，棕榈叶（PF）是油棕种植园的副产品，在收获后往往会腐烂。EPS和PF都是潜在的能源生产原料。共热解是一种利用EPS废弃物和PF的工艺，是推进循环经济的一种很有前途的方法。本研究旨在分析热解油轻馏分的组成，并评价利用轻馏分提高汽油研究辛烷值（RON）的有效性。在一个8升反应器进料容量的实验装置中，在300、400和500℃的温度下，以PF与EPS的质量比分别为10:90、82:18和90:10进行共热解。在不同温度和PF与EPS质量比下，热解油收率为9.67 ~ 83.12 wt.%。为了分离汽油沸点附近的轻馏分，采用旋转真空蒸发器对裂解油进行处理。当PF与EPS质量比为10:90时，热解油的轻馏分产量较高。分离的轻馏分由两相组成：油相和水相。300℃、400℃和500℃热解油相收率分别为39.99%、45.17%和42.50%。采用气相色谱-精细烃分析（GC-DHA）对轻馏分油相进行分析，预测其研究辛烷值（RON）。在300℃条件下，PF与EPS质量比为10:90的油相的RON值较高，为106。该油相含单芳烃98.41%，主要化合物为苯乙烯44.0%，乙苯27.9%，α-甲基苯乙烯16.6%。在95%的汽油中加入5%体积的这种油相，使RON从90.0提高到91.5。根据循环经济的原则，EPS废料和棕榈叶——目前未充分利用的材料——的存在被减少并在能源部门重新利用。这是通过共热解过程实现的，然后分离较轻的馏分用于液体燃料的应用。

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引用次数: 0

Synthesizing calcium phosphate powder from bovine bone wastes using calcination and hydrothermal techniques to evaluate physicochemical properties and mineralogy speciation 利用煅烧和水热技术从牛骨废物中合成磷酸钙粉末，对其理化性质和矿物学形态进行了评价

IF 5.4

Sustainable Chemistry for Climate Action

Pub Date : 2025-11-27 DOI: 10.1016/j.scca.2025.100165

Yustina M. Pusparizkita , Wolfgang W Schmahl , Geraldus D. Ardian Satria , Rifky Ismail , J. Jamari , Athanasius P. Bayuseno

This study focuses on developing a sustainable method for producing high-purity, nanocrystalline, ion-substituted natural hydroxyapatite (HA) from bovine bone waste through sequential calcination and hydrothermal treatment, and to characterize its physicochemical and morphological properties for potential biomedical applications. Calcination at 900 °C for 8 h removed organic matter and produced 90 wt.% crystalline HA. Hydrothermal treatment with diammonium hydrogen phosphate (pH 7.5–8.0) at 110 °C for 12–18 h produced magnesium (Mg) and sodium (Na) ion-substituted carbonated HA with Ca/P ratios of 1.6–1.9. Scanning Electron Microscopy (SEM) analysis showed nanocrystals of 60–80 nm forming non-uniform agglomerates of 0.1–0.5 mm. The combination of high yield, ion substitution, and nanoscale morphology indicates strong potential across various fields, particularly in biomedical applications, environmental sustainability, and agriculture.

本研究的重点是开发一种可持续的方法，通过顺序煅烧和水热处理，从牛骨废物中生产高纯度、纳米晶、离子取代的天然羟基磷灰石（HA），并表征其潜在的生物医学应用的物理化学和形态特性。在900°C下煅烧8小时，去除有机物，产生90 wt.%的结晶HA。用磷酸氢二铵（pH 7.5-8.0）在110℃下水热处理12-18 h，可制得Ca/P比值为1.6-1.9的镁（Mg）和钠（Na）离子取代碳酸化HA。扫描电镜（SEM）分析显示，60-80 nm的纳米晶体形成0.1-0.5 mm的不均匀团聚体。高产量、离子取代和纳米级形态的结合表明，在各个领域，特别是在生物医学应用、环境可持续性和农业方面，具有强大的潜力。

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引用次数: 0

Phyto-optimised Ag, Sn, Pb, And Fe oxide nanoparticles from nine precursors: A comparative study of antimicrobial, antioxidant, and photocatalytic activities 九种前体植物优化的银、锡、铅、铁氧化物纳米颗粒：抗菌、抗氧化和光催化活性的比较研究

IF 5.4

Sustainable Chemistry for Climate Action

Pub Date : 2025-11-27 DOI: 10.1016/j.scca.2025.100164

Yuvaraj Tamilselvi , Loganathan Lingeshwaran , Kanagasabapathy Sivasubramanian , Palanivel Velmurugan , Subhashree Kuppusamy , Seema siddharthan , Moorthy Muruganandham , Jeyanthi Rebecca Livingstone

The study details the primary comparative phyto-optimized green synthesis of four metal oxide nanoparticles—Ag₂O, SnO₂, PbO, and Fe₃O₄—using Hylocereus undatus (dragon fruit) extract as a natural reducing and stabilizing agent. The average crystallite sizes of the biosynthesized nanoparticles were found to range from 29 to 45 nm, as revealed by XRD and TEM analyses. FTIR spectra showed the presence of phytochemical functional groups, suggesting their role in the reduction and stabilization. The nanoparticles displayed considerable antibacterial action, inhibiting S. aureus and E. coli at MICs of 12.5–50 µg mL⁻¹, and exhibited a dose-dependent antioxidant effect, reaching a maximum of 90% DPPH scavenging with Ag₂O. Under UV light, the degradation of methyl orange reached 85% efficiency for SnO₂ within 5 hours, based on a pseudo-first-order kinetic model. Due to its smaller particle size and enhanced surface plasmon resonance, Ag₂O displayed superior multifunctional performance compared to the other four oxides. These findings show that using H. undatus for synthesis offers an environmentally friendly method to create high-performance metal oxide nanomaterials for various applications in the environment and healthcare sectors.

以火龙果提取物为天然还原剂和稳定剂，对ag₂O、SnO₂、PbO和Fe₃O₄四种金属氧化物纳米颗粒进行了初步的植物优化比较绿色合成。XRD和TEM分析表明，合成的纳米颗粒的平均晶粒尺寸在29 ~ 45 nm之间。FTIR光谱显示了植物化学官能团的存在，表明它们在还原和稳定中的作用。纳米颗粒显示出相当大的抗菌作用，在12.5-50µg mL - 1的mic范围内抑制金黄色葡萄球菌和大肠杆菌，并表现出剂量依赖性的抗氧化作用，与Ag₂O的DPPH清除率最高可达90%。在紫外光作用下，基于准一级动力学模型，甲基橙在5小时内对SnO 2的降解效率达到85%。由于其较小的粒径和增强的表面等离子体共振，与其他四种氧化物相比，Ag₂O表现出优越的多功能性能。这些发现表明，使用H. undatus进行合成提供了一种环保的方法来制造高性能的金属氧化物纳米材料，可用于环境和医疗保健领域的各种应用。

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