Journal of Analytical and Applied Pyrolysis最新文献_第10页

Importance of pyrolysis temperature in distribution and toxicity of PAHs from typical garden leaves 热解温度对典型园林树叶中多环芳烃的分布和毒性的重要性

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-12-17 DOI: 10.1016/j.jaap.2025.107563

Wenjing Xia , Qihang Zhu , Zhonghao Wu

Garden waste is the second largest solid waste in Chinese cities, but the resource utilization rate is less than 5 %. Pyrolysis technology is regarded as a potential solution, but PAHs released during pyrolysis pose serious threats to environmental and human health. To investigate concentration distribution, gas-particle phase distribution characteristics and toxicological risks of PAHs released from pyrolysis, Py-GC/MS was used to conduct pyrolysis on typical garden fallen leaves (leaves of Camphor, Liriodendron and Rhododendron) at 400 °C, 650 °C, and 900 °C, combined with GC/MS. Risks of PAHs released from pyrolysis at different temperatures were evaluated through toxicological models of gas-particle phase distribution, Toxic Equivalent concentration of total PAHs (TEQ), Mutagenic Equivalents of total PAHs (MEQ) and Excess Cancer Risk (ECR). The research showed PAHs released from pyrolysis were significantly temperature-dependent. PAHs were mainly distributed in a coordinated manner between gas-phase and particle-phase (-0.59 ≤logK_P≤-0.75), which was not influenced by pyrolysis temperatures. The research determined main contribution of toxicity from pyrolysis of leaves originated from High-Molecular-Weight PAHs (HMW-PAHs), especially Bap, IP and DBA. TEQ and MEQ values increased significantly with pyrolysis temperature rising. Mean TEQ and MEQ values were over 1 × 10³ ng/g at 400°C and 3 × 10³ ng/g at 900 °C. HMW-PAHs were basically assessed as unacceptable risks by ECR. PAHs characteristics of emission and gas-particle phase distribution and toxicological risk assessment from pyrolysis of typical fallen leaves in East China at different temperatures are provided, offering key bases for improving the pyrolysis process of garden waste.

园林废弃物是我国城市第二大固体废弃物，但资源化利用率还不到5% %。热解技术被认为是一种潜在的解决方案，但热解过程中释放的多环芳烃对环境和人体健康构成严重威胁。为了研究热解释放的多环芳烃的浓度分布、气相分布特征及毒理学风险，采用Py-GC/MS结合GC/MS对典型园林落叶（樟脑、鹅尾楸和杜鹃）在400℃、650℃和900℃条件下进行热解。通过气相分布、总多环芳烃毒性当量浓度（TEQ）、总多环芳烃致突变当量（MEQ）和过量致癌风险（ECR）等毒理学模型对不同温度下热解释放的多环芳烃的风险进行评价。研究表明，热解释放的多环芳烃具有明显的温度依赖性。多环芳烃主要在气相和颗粒相之间协调分布（-0.59 ≤logKP≤-0.75），不受热解温度的影响。研究确定了叶片热解毒性的主要贡献来源于高分子量多环芳烃（HMW-PAHs），尤其是Bap、IP和DBA。随着热解温度的升高，TEQ和MEQ值显著升高。平均TEQ和MEQ值在400°C时超过1 × 103 ng/g，在900°C时超过3 × 103 ng/g。高分子量多环芳烃基本上被ECR评估为不可接受的风险。提供了不同温度下华东地区典型落叶热解多环芳烃排放特征、气相分布特征及毒理学风险评价，为改善园林废弃物热解工艺提供了关键依据。

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引用次数: 0

Preparation of sheet-like core-shell structured ZSM-5/SiO2 zeolite for catalytic pyrolysis of low-density polyethylene to produce low-carbon olefins 片状核壳结构ZSM-5/SiO2沸石的制备及其在低密度聚乙烯催化热解生产低碳烯烃中的应用

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-12-16 DOI: 10.1016/j.jaap.2025.107557

Ting Zhao , Longshan Shen , Wenyu Lu , Yufei Gu , Yanmei Huang , Wei Wang , Zhixia Li , Hongfei Lin

In this study, a core-shell structured ZSM-5/SiO₂ zeolite (ZSCS50) was successfully synthesized using a two-step hydrothermal crystallization method coupled with a low-temperature sol–gel strategy. The core is composed of sheet-like microporous ZSM-5 (b-axis length ≈ 220 nm), while the shell consists of mesoporous SiO₂ with a ribbon-corrugated structure, thus forming a composite zeolite with a hierarchical porous architecture. ZSCS50 exhibits high specific surface area (323 m²/g) and abundant weak acid sites. During the catalytic pyrolysis of low-density polyethylene (LDPE) at 550 °C, a gas yield of 85.3 % was achieved, with a selectivity of 68.4 % for low-carbon olefins (ethylene, propylene, and butylene). After 8 consecutive catalytic pyrolysis cycles of LDPE, ZSCS50 still maintained a gas yield of 87.5 % and a low-carbon olefin selectivity of 62 %, which were significantly higher than those of the uncoated core ZSM-5 (84.8 % and 47.8 %, respectively). ZSCS50 demonstrates excellent coking resistance, catalytic activity, and operational stability, and exhibits great application potential in the efficient conversion of waste plastics into high-value-added light olefins via catalytic pyrolysis.

本研究采用两步水热结晶法结合低温溶胶-凝胶策略成功合成了一种核壳结构的ZSM-5/SiO2分子筛（ZSCS50）。芯层由片状微孔ZSM-5 （b轴长度≈220 nm）组成，壳层由带状波纹结构的介孔SiO2组成，从而形成具有分层多孔结构的复合分子筛。ZSCS50具有较高的比表面积（323 m2/g）和丰富的弱酸位点。低密度聚乙烯（LDPE）在550℃催化热解时，产气量为85.3 %，对低碳烯烃（乙烯、丙烯和丁烯）的选择性为68.4% %。经过8个连续的LDPE催化热解循环后，ZSCS50仍保持87.5 %的产气量和62 %的低碳烯烃选择性，显著高于未包覆的ZSM-5（84.8 %和47.8 %）。ZSCS50具有优异的抗结焦性、催化活性和操作稳定性，在废塑料催化热解高效转化为高附加值轻质烯烃方面具有很大的应用潜力。

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引用次数: 0

Synergistic interactions in the thermal decomposition of leather and PVC mixtures 皮革和PVC混合物热分解中的协同作用

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-12-16 DOI: 10.1016/j.jaap.2025.107558

István Sándor Czirok , Bence Babinszki , Zoltán Sebestyén , Emma Jakab , Elena Badea , Zsuzsanna Czégény

The problem of mixed leather waste (natural and artificial) is recognized as a significant issue in industrial recycling, since the separation of these materials is challenging. However, thermochemical conversion is widely researched as a feasible method for dealing with such a complex waste stream. Deeper understanding of the interactions between the components during thermal decomposition and the effect of the reactive hydrogen chloride evolving from PVC (a usual component of artificial leather) should be considered in the planning of thermal recycling processes, and therefore, these findings can be of interest to users and manufacturers. In this paper, co-pyrolysis of PVC and natural leather was investigated by thermogravimetry/mass spectrometry (TG/MS) and pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) methods. The study revealed the mutual influence of PVC and proteinaceous materials, such as leather, during thermal decomposition. The thermal stability of PVC decreased in the presence of leather, as the dehydrochlorination step shifted to lower temperatures by 20–30 °C, regardless of the tanning type of leather. Conversely, the thermal decomposition of leather was altered by the presence of PVC, favoring fragmentation reactions over depolymerization, which resulted in the formation of more hydrogen cyanide and acetonitrile but less diketopiperazines (DKPs). The effect of hydrogen chloride released by PVC in these processes was further studied by the pyrolysis of a model sample, which confirmed the primary role of hydrogen chloride in the increased hydrogen cyanide and acetonitrile evolution. The formation of mono- and polyaromatic compounds was increased slightly during pyrolysis of leather–PVC mixtures, which could contribute to the decreased char yields of the mixtures measured by TGA.

混合皮革废料（天然和人造）的问题被认为是工业回收中的一个重大问题，因为这些材料的分离是具有挑战性的。然而，热化学转化作为处理这种复杂废物流的可行方法被广泛研究。在热回收过程的规划中，应该考虑更深入地了解热分解过程中组分之间的相互作用以及从PVC（人造皮革的一种常见成分）演变的活性氯化氢的影响，因此，这些发现可能对用户和制造商感兴趣。采用热重/质谱法（TG/MS）和热解-气相色谱/质谱法（Py-GC/MS）研究了PVC与天然皮革的共热解过程。该研究揭示了PVC和蛋白质材料（如皮革）在热分解过程中的相互影响。当皮革存在时，PVC的热稳定性下降，因为脱氢氯化步骤转移到较低的温度20-30°C，无论皮革的鞣制类型如何。相反，PVC的存在改变了皮革的热分解，有利于裂解反应而不是解聚反应，这导致形成更多的氰化氢和乙腈，但较少的二酮哌嗪（DKPs）。通过模型样品的热解进一步研究了PVC在这些过程中释放的氯化氢的影响，证实了氯化氢在氰化氢和乙腈析出过程中的主要作用。皮革-聚氯乙烯混合物热解过程中单芳香族化合物和多芳香族化合物的生成略有增加，这可能是热重分析仪测定的混合物炭产率下降的原因。

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引用次数: 0

Mechanistic study of graphene-assisted microwave pyrolysis and carbon fiber regeneration from waste wind turbine blades 石墨烯辅助微波热解及废弃风力发电机叶片碳纤维再生机理研究

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-12-15 DOI: 10.1016/j.jaap.2025.107555

Yuming Tian , Long Jiao , Guohao Yang , Jiajie Zhang , Yanjun Hu

Due to their superior mechanical properties, carbon fiber-reinforced thermosetting resin composites have become the primary material for the main beam structures of ultra-large wind turbine blades, driven by the growing demand for lightweight designs. However, blade recycling methods are hindered by several challenges, including the poor degradability of the resin matrix, which causes carbon fiber breakage and significant interfacial damage, all of which critically limit resource recovery. This study proposes a graphene-assisted, microwave-catalyzed thermal conversion process for wind turbine blades, aiming to achieve efficient and high-quality carbon fiber regeneration by optimizing the parameters of the microwave pyrolysis–oxidation stage and leveraging the catalytic pyrolysis effect of graphene on the resin matrix. Compared with traditional pyrolysis, this technology increases the carbon fiber recovery rate to 98.1 %, retaining over 95 % of the tensile strength and over 99 % of the modulus. Microscopic characterization reveals that this technology significantly enhances the graphitization degree of recycled carbon fibers, introducing abundant nitrogen and oxygen functional groups that promote a strong interfacial bonding ability. Additionally, the technology enhances the synergistic value-added utilization of pyrolysis gas and oil, resulting in a 13.9 % increase in hydrogen (H₂) yield and a 10 % increase in the phenolic content of the pyrolysis oil. The regenerated fibers, exhibiting excellent mechanical integrity and enhanced surface functionality, demonstrate strong potential for reuse in high-performance composites, including secondary wind turbine blades, automotive components, and structural panels, thereby supporting a sustainable closed-loop recycling system.

由于碳纤维增强热固性树脂复合材料具有优异的机械性能，在日益增长的轻量化设计需求的推动下，碳纤维增强热固性树脂复合材料已成为超大型风力涡轮机叶片主梁结构的主要材料。然而，叶片回收方法受到几个挑战的阻碍，包括树脂基体的可降解性差，导致碳纤维断裂和明显的界面损伤，所有这些都严重限制了资源的回收。本研究提出了石墨烯辅助微波催化风电叶片热转化工艺，通过优化微波热解-氧化阶段参数，利用石墨烯对树脂基体的催化热解作用，实现高效、高质量的碳纤维再生。与传统热解相比，该技术使碳纤维的回收率提高到98.1% %，保持了95% %以上的抗拉强度和99% %以上的模量。微观表征表明，该技术显著提高了再生碳纤维的石墨化程度，引入了丰富的氮和氧官能团，促进了强大的界面结合能力。此外，该技术提高了热解气和油的协同增值利用，使热解油的氢气收率提高13.9 %，酚类含量提高10 %。再生纤维具有优异的机械完整性和增强的表面功能，在高性能复合材料中具有强大的再利用潜力，包括二次风力涡轮机叶片、汽车部件和结构板，从而支持可持续的闭环回收系统。

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引用次数: 0

The influence of pitch source on oxidation reactivity and thermal conversion behavior 沥青源对氧化反应性和热转化行为的影响

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-12-13 DOI: 10.1016/j.jaap.2025.107551

Jiaxing Yue, Xiliang Wen, Yaming Zhu, Jianfeng Deng, Junxia Cheng, Xuefei Zhao

Oxidation modification is a crucial method for preparing pitch-based carbon materials. To deeper understand the influence of this process on different types of pitches, five pitches with varying sources and properties were selected, and their softening points were adjusted to a similar range through oxidation. Then,various analytical techniques were used to compare their oxidation reactivity, structural parameters, thermal stability, and thermal conversion behavior. The results showed that medium-low temperature coal pitch (MLP) and ethylene tar pitch (ETP) had higher molecular weights, more alkyl side chains, and lower aromatic condensation degree. They exhibited poor thermal stability and high oxidation reactivity. After oxidation, they contained more C(O)-O groups, making them more prone to in-situ coking during thermal conversion. The thermal conversion products were more disordered, and mainly exhibited optical mosaic structure. In contrast, modified pitch (MP) and soft pitch (SP) had higher aromatic condensation degree, better thermal stability, and lower molecular weights. The oxidation mainly produced ether bonds and hydroxyl groups with C-O structures, and their thermal conversion products showed higher graphitization degree. Under polarizing microscope, they exhibiting clearly delineated fibrous flow domain structure. This work provides a theoretical foundation and experimental support for the high-value utilization of pitch and the controllable preparation of high-performance carbon materials.

氧化改性是制备沥青基碳材料的重要方法。为了更深入地了解这一过程对不同类型沥青的影响，选择了5种不同来源和性质的沥青，并通过氧化将其软化点调整到相似的范围。然后，利用各种分析技术比较了它们的氧化反应性、结构参数、热稳定性和热转化行为。结果表明：中低温煤沥青（MLP）和乙烯沥青（ETP）分子量较高，烷基侧链较多，芳香缩合度较低；它们表现出较差的热稳定性和较高的氧化活性。氧化后，它们含有更多的C(O)-O基团，使它们在热转化过程中更容易发生原位结焦。热转化产物较为无序，主要表现为光学马赛克结构。改性沥青（MP）和软沥青（SP）具有较高的芳烃缩合度、较好的热稳定性和较低的分子量。氧化主要生成具有C-O结构的醚键和羟基，其热转化产物表现出较高的石墨化程度。在偏光显微镜下，它们表现出清晰的纤维流域结构。本研究为沥青的高价值利用和高性能碳材料的可控制备提供了理论基础和实验支持。

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引用次数: 0

Synergistic effect of microplastics on enhancing tetracycline adsorption onto spontaneous magnetic sludge-derived biochar 微塑料增强磁污泥生物炭吸附四环素的协同效应

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-12-13 DOI: 10.1016/j.jaap.2025.107554

Jiangzhe Fu , Huidong Li , Yuxin Liu , Ruihui Gong , Xiaofeng Guo

The coexistence of antibiotics and microplastics (MPs) pollution in aquatic environments has drawn widespread attention. However, little research has been conducted on the influence of MPs coexistence on the adsorption of antibiotics by biochar. This study successfully produced spontaneously magnetic sludge-derived biochar through co-pyrolysis of sewage sludge (SS) and red mud (RM). The removal of tetracycline (TC) by pristine biochar and surfactant-modified biochar was investigated in the presence of polystyrene microplastics (PS) of varying sizes. The effect of pyrolysis temperature on biochar properties was investigated, and the biochar prepared at 700°C was observed to exhibit the best specific surface area and pore structure. The effects of different initial PS concentrations, pH, coexisting ions, and natural organic matter (NOM) on TC removal were also investigated. Based on the characterization results and adsorption models, the adsorption process primarily involves interactions such as pore filling, electrostatic attraction, hydrogen bonding, π-π bonding, and metal complexation. The coexisting PS primarily promote the adsorption of TC onto sludge-derived biochar through hydrophobic, electrostatic, and π-π bonding interactions, with better promotion observed for large size PS. The recycling experiment benefited from the spontaneous magnetism generated by sludge-derived biochar, with material adsorption efficiency showing significant decline only after five cycles, and the modified biochar exhibiting an even smaller decrease. This study offers a novel approach for the resource recovery and reuse of industrial solid waste, while also providing theoretical insights and technical support for the remediation of wastewater contaminated with both microplastics and antibiotics using biochar.

抗生素和微塑料污染在水生环境中的共存已引起广泛关注。然而，关于MPs共存对生物炭吸附抗生素的影响的研究很少。本研究成功地通过污水污泥（SS）和赤泥（RM）共热解制备了自发磁性污泥源生物炭。在不同尺寸聚苯乙烯微塑料（PS）存在的情况下，研究了原始生物炭和表面活性剂改性生物炭对四环素（TC）的去除效果。研究了热解温度对生物炭性能的影响，发现在700℃制备的生物炭具有最佳的比表面积和孔隙结构。考察了不同初始PS浓度、pH、共存离子和天然有机物（NOM）对TC去除率的影响。根据表征结果和吸附模型，吸附过程主要涉及孔隙填充、静电吸引、氢键、π-π键和金属络合等相互作用。共存的PS主要通过疏水、静电和π-π键的相互作用促进TC在污泥源性生物炭上的吸附，大粒径PS的促进作用更强。回收实验得益于污泥源性生物炭产生的自发磁性，只有在循环5次后材料吸附效率才显著下降，改性后的生物炭下降幅度更小。本研究为工业固体废弃物资源化利用提供了新途径，同时也为生物炭修复微塑料和抗生素污染废水提供了理论见解和技术支持。

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引用次数: 0

Synergistic effects in the co-pyrolysis of chlorogenic acid and glucose: Implications for tobacco flavor and smoke chemistry 绿原酸和葡萄糖共热解的协同效应：对烟草风味和烟雾化学的影响

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-12-12 DOI: 10.1016/j.jaap.2025.107553

Yuhan Peng , Bingyan Sun , Shitou Li , Jie Huang , Chengxu Zheng , Shiming Zhang , Haifeng Li , Yuehui Qiao , Kaige Wang , Yiming Bi

Understanding the formation pathways of toxic phenolic compounds in tobacco smoke is essential for improving smoke quality and reducing health risks. In this study, the co-pyrolysis behavior of chlorogenic acid (CGA), a key polyphenol in tobacco, and glucose, a major saccharide component, was systematically investigated using thermogravimetric analysis (TGA), Py-GC/MS, and ReaxFF reactive molecular dynamics simulations. Fast and programmed pyrolysis experiments revealed that CGA decomposition predominantly yields phenols and catechols, while the presence of glucose significantly alters the product distribution, enhancing the formation of furanics and sugars, and suppressing certain phenolic outputs. ReaxFF-MD simulations at 2000 K and 2500 K showed accelerated bond cleavage and gas-phase evolution in the CGA–glucose system compared to CGA alone, with substantial reductions in C-C and C-O bond counts and increased volatile production. These results indicate a clear synergistic effect, whereby glucose-derived intermediates facilitate secondary reactions, modulating the pyrolysis pathway of CGA. This work provides mechanistic insight into smoke formation and offers implications for tobacco flavor engineering and toxicant control.

了解烟草烟雾中有毒酚类化合物的形成途径对于改善烟雾质量和降低健康风险至关重要。本研究采用热重分析（TGA）、Py-GC/MS和ReaxFF反应分子动力学模拟等方法，系统研究了烟草中主要多酚——绿原酸（CGA）与主要糖组分葡萄糖的共热解行为。快速和程序化热解实验表明，CGA分解主要产生酚类和儿茶酚类，而葡萄糖的存在显著改变了产物的分布，促进了呋喃和糖的形成，抑制了某些酚类的输出。ReaxFF-MD模拟显示，在2000 K和2500 K下，与单独使用CGA相比，CGA -葡萄糖系统中的键裂解和气相演化加速，C-C和C-O键计数大幅减少，挥发性产物增加。这些结果表明了一个明显的协同效应，即葡萄糖衍生的中间体促进二次反应，调节CGA的热解途径。这项工作提供了烟雾形成的机理，并为烟草香料工程和毒物控制提供了启示。

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引用次数: 0

Review of sulfur doping on porous carbon for carbon dioxide adsorption 硫掺杂多孔碳吸附二氧化碳的研究进展

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-12-11 DOI: 10.1016/j.jaap.2025.107549

Yifan Kang , Bin Zhou , Tai Feng, Hao Wang, Yueyang Wang, Peichao Qu, Guoliang Liu, Cuiping Wang

Porous carbon has garnered significant attention as a material for CO₂ adsorption due to its widely sourced, low cost, high porosity, chemical stability, rapid adsorption-desorption kinetics, and strong resistance to water. In order to enhance the interaction between carbon dioxide molecules and carbon surface, heteroatom doping is a common method to change the inherent non-polar properties of porous carbon. Among various doping strategies, sulfur doping stands out for its ability to expand interlayer spacing and modify the local electronic structure. This review comprehensively examines the mechanisms and performance of CO₂ adsorption by S-doped carbon materials. It first introduces the types of S-containing functional groups and their characterization methods. Next, it summarizes the preparation approaches for S-doped porous carbon, which include endogenous sulfur-carbon co-source methods, exogenous sulfur-loading methods, and synergistic endogenous-exogenous doping strategies. Subsequently, the effects of pore structure and functional groups on CO₂ adsorption performance are discussed, with insights drawn from density functional theory (DFT)，grand canonical Monte Carlo (GCMC) calculation, and experimental studies. Finally, the review explores the impact of co-doping sulfur with other elements, such as nitrogen and oxygen, on the CO₂ adsorption performance. This work provides a detailed overview of the characterization, preparation, and physicochemical properties of S-doped porous carbons, alongside their influence on CO₂ adsorption. It highlights the practical prospects and challenges of these materials, offering valuable insights to guide future research.

多孔碳由于其来源广泛、成本低、孔隙率高、化学稳定性好、吸附-解吸动力学快、耐水性强等优点，作为CO2吸附材料受到了广泛的关注。为了增强二氧化碳分子与碳表面的相互作用，杂原子掺杂是改变多孔碳固有非极性性质的常用方法。在各种掺杂策略中，硫掺杂以其扩大层间间距和改变局部电子结构的能力而脱颖而出。本文综述了s掺杂碳材料吸附CO2的机理和性能。首先介绍了含s官能团的类型及其表征方法。其次，总结了硫掺杂多孔碳的制备方法，包括内源硫-碳共源法、外源硫负载法和内源-外源协同掺杂策略。随后，讨论了孔结构和官能团对CO2吸附性能的影响，并从密度泛函理论（DFT）、大正则蒙特卡罗（GCMC）计算和实验研究中得出了见解。最后，综述了硫与氮、氧等元素共掺杂对CO2吸附性能的影响。这项工作提供了表征，制备和s掺杂多孔碳的物理化学性质的详细概述，以及它们对二氧化碳吸附的影响。它突出了这些材料的实际前景和挑战，为指导未来的研究提供了有价值的见解。

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引用次数: 0

Hierarchical porous self-supporting carbon modified with carbon nanospheres for high-performance supercapacitors 用碳纳米球修饰层次化多孔自支撑碳用于高性能超级电容器

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-12-11 DOI: 10.1016/j.jaap.2025.107545

Kaiming Dong , Zhenjie Sun , Chen Yang , Ge Jing , Zhenming Li , Jialong Chen , Mingjie Xiong , Hui Li , Yunpu Wang , Feiqiang Guo

Carbon-based electrode materials with controllable microstructure and rationalized pore distribution are the key to improve the transport and diffusion efficiency of electrolyte ions. In this paper, a new process of carbon nanosphere deposition integrating hydrothermal carbonization and thermochemical conversion was developed using natural porous pine as precursor, and a carbon nano-sphere modified porous capacitive carbon material (CW-H-6) without conductive agent and binder was successfully prepared. The surface and channel walls of CW-H-6 are uniformly modified with carbon nanospheres with a diameter of about 200–300 nm, forming a hierarchical pore structure of microporous-mesoporous-macroporous multi-stage synergy, which substantially enhances both volumetric efficiency and electrochemical storage capability of self-supporting capacitive carbon. CW-H-6 demonstrates an areal specific capacitance of 6.36 F cm⁻² at a current density of 2 mA cm⁻², which is 66.4 % higher than the self-supporting capacitive carbon of unmodified carbon nanospheres. A symmetric supercapacitor was constructed based on the CW-H-6 electrodes, which exhibited an energy density of 236.10 μWh cm⁻² at a power density of 1 mW cm⁻². Furthermore, the symmetric supercapacitor demonstrates exceptional cycling durability, retaining 107.3 % of its original capacitance after 8000 consecutive charge-discharge cycles.

具有可控微观结构和合理孔隙分布的碳基电极材料是提高电解质离子传输和扩散效率的关键。本文以天然多孔松木为前驱体，开发了一种集水热炭化和热化学转化为一体的碳纳米球沉积新工艺，成功制备了不含导电剂和粘结剂的碳纳米球修饰多孔电容碳材料（CW-H-6）。采用直径约200-300 nm的碳纳米球均匀修饰CW-H-6的表面和通道壁，形成微孔-介孔-大孔多级协同作用的分级孔结构，大大提高了自持性电容碳的体积效率和电化学存储能力。在电流密度为2 mA cm−2时，w - h -6的面比电容为6.36 F cm−2，比未改性碳纳米球的自支撑电容碳高66.4 %。在功率密度为1 mW cm−2的情况下，以CW-H-6为电极材料构建了能量密度为236.10 μWh cm−2的对称超级电容器。此外，对称超级电容器表现出优异的循环耐久性，在8000次连续充放电循环后，其原始电容保持了107.3 %。

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引用次数: 0

A comparative analysis of product distributions and characteristics from pyrolysis of broiler manure, naturally dried broiler manure, and layer hen manure 肉鸡粪、自然干燥肉鸡粪、蛋鸡粪热解产物分布及特性对比分析

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-12-11 DOI: 10.1016/j.jaap.2025.107552

Hongyu Zan, Zhan Li, Meijun Fan, Guan Wang, Bin Liu, Yongqiang Chen, Nan Mao, Rui Li, Shuanghui Deng, Xuebin Wang

With the continuous increase in poultry manure production, the proper management of this waste has become a significant environmental and resource management challenge. This work studied the product distributions and characteristics from pyrolysis of broiler manure (BM), naturally dried broiler manure (NM) and layer hen manure (LM) in a horizontal tube furnace in the temperature range of 300–500°C. Gas chromatography (GC), gas chromatography-mass spectrometry (GC-MS), a specific surface area analyzer and scanning electron microscopy (SEM) were performed to analysis pyrolysis products. Results indicated that BM exhibited higher pyrolysis bio-oil yield than LM or NM after pyrolysis. All pyrolysis bio-oils contained high levels of acids, among which n-Hexadecanoic acid was the most abundant component and served as a high-quality precursor compound for biodiesel production. All the three manures produced low gas yield at 500°C, yet combustible gases (referring to H₂, CO, CH₄) constituted over 30 % of the generated gas stream. At 450°C pyrolysis, LM produced biochar with a yield (66 %) and the biggest specific surface area (12.403 m²/g). Principal component analysis (PCA) further revealed that feedstock properties were the dominant factors influencing product distributions. This work highlights the potential of low-temperature pyrolysis for sustainable manure management and energy recovery, while providing insights for the directional conversion of different manures into value-added products based on their inherent properties.

随着禽畜粪便产量的不断增加，对这些废物的妥善管理已成为环境和资源管理方面的重大挑战。研究了水平管式炉在300 ~ 500℃温度范围内热解肉鸡粪（BM）、自然干燥肉鸡粪（NM）和蛋鸡粪（LM）的产物分布和特性。采用气相色谱（GC）、气相色谱-质谱（GC- ms）、比表面积分析仪和扫描电镜（SEM）对热解产物进行分析。结果表明，BM热解后的生物油产率高于LM和NM。所有热解生物油都含有高含量的酸，其中正十六酸含量最高，是生产生物柴油的优质前体化合物。在500°C时，三种肥料的产气量都很低，但可燃气体（H2， CO, CH4）占生成气流的30% %以上。在450℃热解下，LM得到的生物炭产率为66 %，比表面积最大（12.403 m2/g）。主成分分析（PCA）进一步揭示了原料性质是影响产品分布的主要因素。这项工作突出了低温热解在可持续粪肥管理和能量回收方面的潜力，同时为基于其固有特性的不同粪肥定向转化为增值产品提供了见解。

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