Journal of Analytical and Applied Pyrolysis最新文献_第2页

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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引用次数: 0

A novel magnetic Fe3C@Fe3O4 core–shell biochar nanocomposite derived from Zanthoxylum bungeanum pruned branches for efficient adsorption of imidacloprid 一种新型磁性Fe3C@Fe3O4核壳生物炭纳米复合材料制备了高效吸附吡虫啉的花椒枝

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.2025.107544

Qi Zhang , Shuangshuang Bai , Mingwan Liu , Zhuhua Gong , Yun Ren , Wenlin Zhang , Qiang Li , Qinhong Liao , Zexiong Chen , Jianmin Tang

Biomass-derived magnetic biochar is a promising imidacloprid adsorbent because of its low cost, easy separation, and eco-friendly features. This study prepared a novel magnetic Fe₃C@Fe₃O₄ core–shell biochar nanocomposite (Fe₃C@Fe₃O₄/BC) using a facile one-step method with Zanthoxylum bungeanum pruning branches as raw materials and K₃[Fe(C₂O₄)₃]•3 H₂O as the pore-forming agent and Fe source. The prepared Fe₃C@Fe₃O₄/BC had a well-developed porous structure, a considerable specific surface area of 1471.3 m² g⁻¹, good magnetic separation performance, and excellent adsorption performance of imidacloprid. The adsorption capacity of Fe₃C@Fe₃O₄/BC toward imidacloprid reached 288.9 mg g⁻¹ within 1 min, and its maximum adsorption capacity was 557.1 mg g⁻¹. The adsorption performance of Fe₃C@Fe₃O₄/BC was was stable under extreme environmental conditions, and its regeneration was excellent, which was superior to typical commercial adsorbents. The adsorption mechanism of imidacloprid by Fe₃C@Fe₃O₄/BC involved the comprehensive effects of pore capture, van der Waals forces, hydrogen bonding, electrostatic attraction, and complexation of oxygen-containing functional groups. This work can provide an advanced strategy for the fabrication of high-performance adsorbents from biomass resources for the effective treatment of imidacloprid wastewater.

生物质磁性生物炭具有成本低、易分离、环保等优点，是一种很有前途的吡虫啉吸附剂。本研究以花椒剪枝为原料，以K3[Fe(C2O4)3]•3 H2O为成孔剂和铁源，采用简便的一步法制备了新型磁性Fe3C@Fe3O4核壳生物炭纳米复合材料（Fe3C@Fe3O4/BC）。制备的Fe3C@Fe3O4/BC具有良好的孔隙结构，比表面积为1471.3 m2 g−1，具有良好的磁分离性能，对吡虫啉具有优异的吸附性能。Fe3C@Fe3O4/BC对吡虫啉的吸附量在1 min内达到288.9 mg g−1，最大吸附量为557.1 mg g−1。Fe3C@Fe3O4/BC在极端环境条件下的吸附性能稳定，再生性能优异，优于典型的工业吸附剂。Fe3C@Fe3O4/BC对吡虫啉的吸附机理涉及孔隙捕获、范德华力、氢键、静电吸引和含氧官能团络合的综合作用。本研究为利用生物质资源制备高效吸附剂，有效处理吡虫啉废水提供了一种先进的策略。

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引用次数: 0

Phase behavior prediction of medium to high maturity shale oil in the Songliao Basin: Insights from compositional generation kinetics 松辽盆地中、高成熟页岩油相行为预测：组分生成动力学的启示

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-12-10 DOI: 10.1016/j.jaap.2025.107547

Bo Song , Fangwen Chen , Shuangfang Lu , Min Wang , Ming Li , Jinbu Li , Nengwu Zhou , Wenbiao Li

Accurate prediction of hydrocarbon composition is essential for evaluating hydrocarbon quality and recoverability. However, research on pre-drilling prediction of subsurface fluid phase behavior for medium to highmaturity shale oil remains limited. Given that compositional kinetics can effectively evaluate and predict the compositional evolution of shale oil and gas reservoirs, this study focuses on the first member of the Qingshankou Formation (K₂qn₁) in the Songliao Basin. Based on gold-tube hydrocarbon generation simulation experiments, a compositional generation and cracking kinetic model, and a methane correction model derived from pressurized coring, we accurately predicted the phase behavior of medium to high maturity shale oil in the Songliao basin. The results indicate that the difference in methane content between natural and experiment samples is not caused by migration-induced fractionation. Instead, it is likely due to the relatively high temperature and pressure in the experiments, which may cause hydrocarbon fluids to enter a single gas phase prematurely, thereby suppressing methane generation. The discrepancy between the corrected predicted phase diagram and the PVT experiment phase envelope is attributed to light hydrocarbon loss during PVT experiments, as supported by phase envelope simulations under varying degrees of light hydrocarbon depletion. The predicted phase diagram shows that the present day Gulong Sag is a volatile oil reservoir and that a single episode of hydrocarbon migration and fractionation occurred around 66 Ma. This study provides a basis for assessing the phase behavior, mobility, and recoverability of medium- to high-maturity shale oil and gas reservoirs under geological conditions.

准确预测油气成分对评价油气质量和可采性至关重要。然而，对中、高成熟页岩油地下流体相行为的钻前预测研究仍然有限。考虑到组分动力学可以有效地评价和预测页岩油气储层组分演化，本研究以松辽盆地青山口组一段（K2qn1）为研究对象。基于金管生烃模拟实验、组分生成裂解动力学模型和加压取心甲烷校正模型，对松辽盆地中-高成熟页岩油相行为进行了准确预测。结果表明，天然样品与实验样品的甲烷含量差异不是由运移分馏引起的。相反，这可能是由于实验中相对较高的温度和压力，可能导致烃类流体过早进入单一气相，从而抑制甲烷的生成。修正后的预测相图与PVT实验相包络线之间存在差异，这是由于PVT实验过程中轻烃损失造成的，不同轻烃枯竭程度下的相包络线模拟也支持了这一点。预测相图表明，现今古龙凹陷为挥发性油藏，在66 Ma左右发生了一次油气运移分馏。该研究为评价地质条件下中、高成熟页岩油气储层的相行为、流动性和可采性提供了依据。

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引用次数: 0

Advances and perspectives of response surface methodology for product optimization, prediction and synergy identification in biomass and plastic co-pyrolysis 响应面法在生物质与塑料共热解产物优化、预测和协同识别中的进展与展望

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-12-10 DOI: 10.1016/j.jaap.2025.107550

Shengyu Xie , Qingting Yang , Chuan Ma , Shogo Kumagai , Hao Wu , Changsong Zhou , Qiangqiang Ren , Hongmin Yang , Toshiaki Yoshioka

Co-pyrolysis of biomass and plastic waste has emerged as a promising thermochemical route for sustainable fuel and chemical production. However, the complex interplay of biomass composition, plastic types, and operating conditions causes uncertainties in product distribution and ambiguous pyrolytic synergy, hindering process optimization and prediction. Compared with conventional methods, response surface methodology (RSM) can simultaneously assess multi-variable interactions, reduce experimental numbers, and visualize synergistic effects via intuitive response surface plots. This review discusses recent progress in applying RSM to the co-pyrolysis of biomass and plastic, particularly in modeling the influence of critical variables. Temperature and feedstock mixing ratio are important factors in co-pyrolysis, and understanding the independent and interactive effects of pyrolysis parameters is essential for maximizing the yield of target products. Additionally, RSM has demonstrated high predictive accuracy (R² > 0.9) in numerous studies for key pyrolysis outputs, including yields of bio-oil, char, gas, and specific pyrolyzates (levoglucosan, furfural, phenols, and hydrocarbon oil). The potential pyrolytic synergy between biomass and plastics can be visualized through quadratic and cubic models, arising from radical reaction mechanism, heat transfer, and catalytic effects. More importantly, integrating hierarchical cluster analysis has further enhanced the understanding of how interactions influence low-yield pyrolyzates. The combination of RSM and machine learning algorithms has shown promise in improving predictive accuracy and optimizing co-pyrolysis process parameters. Future research should focus on improving model adaptability, enhancing predictive accuracy, strengthening mechanism interpretability, and enabling the intelligent design of co-pyrolysis processes.

生物质和塑料废弃物的共热解已成为一种有前途的可持续燃料和化学品生产的热化学途径。然而，生物质组成、塑料类型和操作条件的复杂相互作用导致产品分布的不确定性和模糊的热解协同作用，阻碍了工艺优化和预测。与传统方法相比，响应面法可以同时评估多变量相互作用，减少实验次数，并通过直观的响应面图可视化协同效应。本文综述了RSM在生物质和塑料共热解研究中的最新进展，特别是在模拟关键变量的影响方面。温度和原料混合比是共热解的重要影响因素，了解热解参数的独立和交互作用对于最大限度地提高目标产物的收率至关重要。此外，RSM在许多关键热解产物的研究中显示出很高的预测精度（R2 > 0.9），包括生物油、木炭、气体和特定热解产物（左旋葡聚糖、糠醛、酚类和碳氢化合物油）的产量。生物质和塑料之间潜在的热解协同作用可以通过二次和三次模型来可视化，由自由基反应机理、传热和催化效应引起。更重要的是，整合层次聚类分析进一步增强了相互作用如何影响低产量热解产物的理解。RSM和机器学习算法的结合在提高预测精度和优化共热解过程参数方面显示出了希望。未来的研究应着眼于提高模型的适应性，提高预测精度，加强机理的可解释性，实现共热解过程的智能化设计。

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引用次数: 0

A novel insight on coke quality: A new approach and index for evaluating coke thermal properties under simulated blast furnace condition 焦炭质量的新认识：模拟高炉条件下焦炭热性能评价的新方法和新指标

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-12-10 DOI: 10.1016/j.jaap.2025.107548

Zhexi Li , Mingxin Wu , Yongqiang Jiang , Tingle Li , Sunny Song , Junchen Huang , Songtao Yang , Qi Wang , Changyu Sun

Coke thermal properties is a key factor in assessing its quality, directly affecting blast furnace (BF) performance. Currently, NSC(Nippon Steel Corporation) and its derivative method(variable temperature and gas conditions) are most commonly used. However, coke with significantly different CRI and CSR can still perform well in BF operations without negatively impacting efficiency. This raises questions about the accuracy of NSC-based methods. Therefore, there is an urgent need for a more accurate evaluation method. In this study, field coke samples are tested under simulated BF conditions (BFC). The reliability of BFC method was validated by comparing results with BF dissection data, and the limitation of NSC-based method are clarified. Based on these findings, two new evaluation indices CAI and CPI are proposed to better assess coke thermal properties. Regression analysis between the new indices and theoretical coke ratio (K_BFC) demonstrated their scientific validity and practical feasibility. Key findings include: BFC method accurately reflects coke solution-loss and degradation behavior under real BF conditions, showing strong consistency with BF dissection results. The temperature and gas conditions used in NSC-based methods are limited, leading to overestimation of low CRI/high CSR coke and underestimation of high CRI/low CSR coke in thermal properties. The new indices provide significantly different evaluations compared to CRI and CSR. The correlation coefficients between CAI/CPI and K_BFC are 0.89 and 0.82, respectively, outperforming the 0.03 and 0.18 obtained by CRI/CSR. BFC method provides a more comprehensive simulation of coke behavior in blast furnace operations, and its derived indexes, CAI and CPI, offer a more accurate assessment of coke thermal properties.

焦炭热性能是评价焦炭质量的关键因素，直接影响高炉的使用性能。目前，NSC（新日铁公司）及其衍生方法（变温度和变气体条件）是最常用的。然而，CRI和CSR差异显著的焦炭在高炉运行中仍能表现良好，而不会对效率产生负面影响。这就对基于nsc的方法的准确性提出了质疑。因此，迫切需要一种更准确的评价方法。在本研究中，现场焦炭样品在模拟高炉条件下进行了测试。通过与高炉解剖数据的对比，验证了BFC方法的可靠性，并指出了基于nsc方法的局限性。在此基础上，提出了两个新的评价指标CAI和CPI，以更好地评价焦炭的热性能。通过对新指标与理论焦炭比（KBFC）的回归分析，验证了新指标的科学有效性和实践可行性。主要发现包括：BFC方法准确反映了真实高炉条件下焦炭的溶失和降解行为，与高炉解剖结果具有较强的一致性。在基于nsc的方法中使用的温度和气体条件是有限的，导致高估了低CRI/高CSR焦炭的热性能，低估了高CRI/低CSR焦炭的热性能。与CRI和CSR相比，新指标提供了显著不同的评价。CAI/CPI与KBFC的相关系数分别为0.89和0.82，优于CRI/CSR的相关系数0.03和0.18。BFC方法可以更全面地模拟焦炭在高炉运行中的行为，其衍生指标CAI和CPI可以更准确地评估焦炭的热性能。

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引用次数: 0

Catalytic pyrolysis of macauba oils over eggshell-derived and commercial CaO for sustainable biohydrocarbon production to biogasoline, SAF, and green diesel formulation 在蛋壳衍生和商用CaO上催化裂解澳门巴油，用于可持续生物烃生产生物汽油，SAF和绿色柴油配方

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-12-10 DOI: 10.1016/j.jaap.2025.107546

Larissa Noemí Silva Freitas, Nilva Pereira Lopes, Fabiana Pereira de Sousa, Vânya M.D. Pasa

The demand for drop-in biofuels that are compatible with existing production, transportation, and storage systems in the oil industry has been growing recently. Challenges, such as adjusting fuel properties and ensuring economic viability for industrial production, still limit their large-scale commercial use. This study evaluated the efficiency of a waste-origin catalyst (CaO from eggshells), which is abundant and inexpensive, for producing drop-in biofuels, particularly Sustainable Aviation Fuel (SAF), from macauba oils. Macauba is a palm species with great adaptability and ample oil productivity, yet it remains relatively unexplored for commercial purposes. Its crude and hydrolyzed oils were analyzed as raw materials for catalytic deoxygenation over CaO. A preliminary study of reaction kinetics using waste-derived CaO from chicken eggshells was also conducted, and the results were compared with those of commercial CaO. The nature of heterogeneous catalysis was confirmed. Levels of up to 95 % wt in hydrocarbon liquids were achieved in an N2 atmosphere at a low cost, under only 10 bar pressure, via a catalytic pyrolysis mechanism. Cyclic hydrocarbons may be obtained with up to 13 % selectivity in a single-step synthesis. Blends with up to 5 % of biofuels in jet fuel, even without prior refining, exhibited crystallization temperatures similar to those of fossil jet fuel, which is quite attractive for the biofuels market. The results indicated a high potential for applying the proposed catalyst and raw materials.

最近，对可与石油工业现有生产、运输和储存系统兼容的生物燃料的需求一直在增长。诸如调整燃料特性和确保工业生产的经济可行性等挑战仍然限制了它们的大规模商业应用。本研究评估了一种来自废物的催化剂（来自蛋壳的CaO）的效率，这种催化剂储量丰富且价格低廉，可用于从澳门巴油中生产生物燃料，特别是可持续航空燃料（SAF）。澳门棕榈是一种适应性强、产油量大的棕榈品种，但其商业用途尚未得到充分开发。以其原油和水解油为原料，进行了CaO催化脱氧研究。初步研究了利用鸡蛋壳废液提取氧化钙的反应动力学，并与工业氧化钙进行了比较。证实了多相催化的性质。在氮气气氛中，通过催化热解机制，仅在10 bar的压力下，以低成本获得了高达95 % wt的碳氢化合物液体。在一步合成中，可以高达13 %的选择性得到环烃。喷气燃料中含有高达5% %生物燃料的混合物，即使没有事先精炼，也表现出与化石喷气燃料相似的结晶温度，这对生物燃料市场非常有吸引力。结果表明，该催化剂和原料具有很高的应用潜力。

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引用次数: 0