Journal of Analytical and Applied Pyrolysis最新文献_第8页

Upgrading oleic acid into renewable gasoline via Ni-enhanced CaO-MgO bifunctional catalysts: Synergistic deoxygenation mechanisms 镍强化CaO-MgO双功能催化剂催化油酸转化为可再生汽油：协同脱氧机制

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-11-08 DOI: 10.1016/j.jaap.2025.107464

Shengzu Zhang , Fenghua Yang , Jida Wang , Chengguo Liu , Defa Hou , Yi Lu , Fulin Yang , Can Liu , Xu Lin , Zhifeng Zheng , Yunwu Zheng

CaO-supported Ni catalysts have been extensively applied in lipids deoxygenation due to their cost-effectiveness and efficiency. However, excessive C-C bond cracking induced by strong base sites and metallic Ni activity limited their practical application. Herein, CaO-MgO supported Ni catalysts with variable MgO content was synthesized via sol-gel method and applied for selective catalytic deoxygenation of fatty acid (saturated and unsaturated) and lipid (edible oil and non-edible oil) for generation high-valuable hydrocarbon-range biofuel in free-H₂ conditions. Additionally, the possible catalytic reaction pathways, deactivation mechanism, reusability and broad applicability were also elucidated. Ni-Ca-Mg catalyst demonstrated exceptional performance in conversion fatty acid and lipids into hydrocarbon fuels, and achieving 86.70 % hydrocarbon (HCs) yield and 56.01 % gasoline selectivity over Ni-Ca-Mg (20:1 mass ratio) catalyst. Detailed characterizations revealed that oxygen vacancies and enriched Lewis acid sites facilitated to -COO* adsorption and dehydration hydrodeoxygenation reaction. More importantly, NiO-MgO solid solution formation significantly stabilized support structure and boosted cycling stability (>85 % activity retention after 4 cycles) and coke position resistance. Besides, catalyst deactivation primarily owing to coke deposition, pore blockage; reductive dissolution and surface oxidation of Ni⁰ active sites as well as weaken of strong metal-support interaction (SMSI) at Ni-support interfaces. This study establishes a novel, low-cost synthesis strategy for high-efficiency Ca-based catalysts, demonstrating significant potential for valorizing carboxylic-rich biomass feedstocks into premium fuels and chemicals.

cao负载镍催化剂因其经济高效的优点在脂质脱氧中得到了广泛的应用。然而，强碱基和金属Ni活性导致的C-C键过度开裂限制了它们的实际应用。本文采用溶胶-凝胶法合成了可变MgO含量的CaO-MgO负载Ni催化剂，并将其应用于游离氢条件下脂肪酸（饱和和不饱和）和油脂（食用油和非食用油）的选择性催化脱氧，制备高价值烃类生物燃料。此外，还阐述了可能的催化反应途径、失活机理、可重复使用性和广泛的适用性。Ni-Ca-Mg催化剂在将脂肪酸和脂类转化为碳氢燃料方面表现出优异的性能，与Ni-Ca-Mg（质量比为20:1）催化剂相比，其碳氢（hc）产率达到86.70 %，汽油选择性达到56.01 %。详细表征表明，氧空位和富集的Lewis酸位点有利于-COO*吸附和脱水加氢脱氧反应。更重要的是，NiO-MgO固溶体的形成显著地稳定了支撑结构，提高了循环稳定性（4次循环后活性保留率>；85 %）和抗焦位性。此外，催化剂失活主要是由于焦炭沉积、孔隙堵塞；Ni⁰活性位点的还原性溶解和表面氧化，以及Ni-载体界面上强金属-载体相互作用（SMSI）的减弱。本研究建立了一种新的、低成本的高效ca基催化剂合成策略，展示了将富含羧基的生物质原料转化为优质燃料和化学品的巨大潜力。

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引用次数: 0

Comparative deep-learning framework for pyrolytic prediction of propellant mixture system: Transformer, convolutional neural network and U-shaped convolutional neural network based individual versus sequential analyses 推进剂混合系统热解预测的深度学习框架比较：变压器、卷积神经网络和基于个体与序列分析的u形卷积神经网络

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-11-07 DOI: 10.1016/j.jaap.2025.107465

Linxuan Zhu , Mi Li , Xingliang Wu , Sen Xu , Yifan Guo , Lin Jiang

Ammonium perchlorate (AP) is widely utilized as a common energetic oxidizer in propellant and explosive systems. Accurate prediction of its thermal decomposition behavior is of great significance for material design and safety assessment. In this study, the thermal decomposition behavior of AP/Al powder mixtures was investigated using synchronous thermal analysis experiments. Based on deep learning methods, three models—convolutional neural network (CNN), U-shaped Convolutional Neural Network (U-Net), and Transformer—were selected to model the DSC curves of the AP/Al powder mixture system at different heating rates, employing two prediction strategies: individual prediction, where each dataset is treated independently, and sequential prediction, in which successive datasets are explicitly linked. By constructing a dataset with a unified temperature range and incorporating features such as temperature gradient, interpolation, and peak indication, the model was able to effectively learn the patterns between low-rate data and predict the pyrolysis curve at a heating rate of 15 K·min⁻¹. The experimental results demonstrate that sequential prediction significantly enhances model performance under sample accumulation conditions. The Transformer model exhibited the best performance across multiple evaluation metrics (MAE, RMSE, R²), with fitting accuracy and generalization ability significantly superior to the other models. This study provides a feasible approach for predicting the thermal decomposition process of energetic materials and offers insights for the subsequent application of deep learning models in the field of thermal analysis.

高氯酸铵作为一种常见的高能氧化剂，在推进剂和炸药系统中得到了广泛的应用。准确预测其热分解行为对材料设计和安全评价具有重要意义。本文采用同步热分析实验研究了AP/Al粉末混合物的热分解行为。基于深度学习方法，选择卷积神经网络（CNN）、u形卷积神经网络（U-Net）和transformer三种模型，对AP/Al粉末混合体系在不同升温速率下的DSC曲线进行建模，采用两种预测策略：个体预测（每个数据集独立处理）和顺序预测（连续数据集显式链接）。通过构建统一温度范围的数据集，结合温度梯度、插值、峰值指示等特征，该模型能够有效学习低速率数据之间的模式，预测升温速率为15 K·min⁻1时的热解曲线。实验结果表明，在样本积累条件下，序列预测显著提高了模型的性能。Transformer模型在多个评价指标（MAE、RMSE、R²）上表现最佳，其拟合精度和泛化能力显著优于其他模型。该研究为预测含能材料的热分解过程提供了一种可行的方法，并为深度学习模型在热分析领域的后续应用提供了见解。

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引用次数: 0

Hierarchical pore structure engineering in bamboo shoot sheath-derived biochar: Synergistic effects of bio-templated chemical activation and gradient pyrolysis 竹笋鞘生物炭的分级孔结构工程：生物模板化化学活化和梯度热解的协同效应

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-11-07 DOI: 10.1016/j.jaap.2025.107466

Wenjun Wu , Jiuhong Wei , Shihua Zheng , Jun Liu , Guojie Zhang , Ying Wang , Huihui Wang , Guoqiang Li , Yuqiong Zhao

The combustion of fossil fuels has led to excessive CO₂ emissions and severe climate impacts, making efficient CO₂ capture an urgent priority. Although chemical activation can enhance the CO₂ adsorption performance of biochar, its extensive use often entails environmental, equipment, and cost challenges. In this study, we present an innovative bio-templating strategy to synthesize hierarchically porous, heteroatom-enriched biochars derived from waste bamboo shoot shells and starch, using K₂CO₃ as an activator and yeast as the bio-template. This method significantly reduces activator consumption compared with conventional activation processes. The optimized biochar, BAS_0.5KC-800, exhibited exceptional CO₂ adsorption capacities of 5.15 mmol/g at 0 ℃ and 3.38 mmol/g at 25 ℃. Structural analysis revealed that its high specific surface area (1186 m²/g) and micropore volume (0.55 cm³/g) provide abundant CO₂ adsorption sites. Furthermore, the bio-templating process successfully introduced N and O heteroatoms into the carbon framework. These functional groups enhance the affinity between biochar and CO₂ through electronic interactions, ensuring excellent adsorption stability over multiple adsorption–desorption cycles. Isotherm and kinetic analyses indicate that CO₂ adsorption proceeds via a multilayer diffusion-controlled mechanism. Moreover, density functional theory (DFT) calculations reveal that N dopants facilitate CO₂ capture through hydrogen bonding, whereas O atoms strengthen dipole–quadrupole interactions. Overall, this study presents a sustainable and cost-effective approach to produce high-performance CO₂ adsorbents from waste biomass and provides comprehensive mechanistic insights into how heteroatom doping promotes CO₂ capture efficiency.

化石燃料的燃烧导致了过量的二氧化碳排放和严重的气候影响，使有效的二氧化碳捕获成为当务之急。虽然化学活化可以提高生物炭的CO2吸附性能，但其广泛使用往往会带来环境、设备和成本方面的挑战。在这项研究中，我们提出了一种创新的生物模板策略，以废竹笋壳和淀粉为原料，以K2CO3为活化剂，酵母为生物模板，合成具有分层多孔性的富含杂原子的生物炭。与传统的活化工艺相比，该方法显著降低了活化剂的消耗。优化后的生物炭BAS0.5KC-800在0℃和25℃下的CO2吸附量分别为5.15 mmol/g和3.38 mmol/g。结构分析表明，其高比表面积（1186 m2/g）和微孔体积（0.55 cm3/g）提供了丰富的CO2吸附位点。此外，生物模板工艺成功地将N和O杂原子引入碳骨架中。这些官能团通过电子相互作用增强了生物炭和CO2之间的亲和力，确保了在多次吸附-解吸循环中优异的吸附稳定性。等温线和动力学分析表明，CO2吸附是通过多层扩散控制机制进行的。此外，密度泛函理论（DFT）计算表明，N掺杂剂通过氢键促进CO2捕获，而O原子加强偶极子-四极子相互作用。总的来说，本研究提出了一种可持续的、经济有效的方法来从废弃生物质中生产高性能的二氧化碳吸附剂，并为杂原子掺杂如何提高二氧化碳捕获效率提供了全面的机制见解。

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引用次数: 0

Pyrolytic conversion of agro-residues into functionalized biochar towards eutrophication management 农业残留物热解转化为功能化生物炭用于富营养化管理

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-11-07 DOI: 10.1016/j.jaap.2025.107450

Sujata Paul , Rangabhashiyam Selvasembian

Eutrophication, primarily driven by excessive ammonium nitrate and phosphate loading into aquatic ecosystems, poses a serious threat to water quality and biodiversity. In recent years, the valorization of agro-residues via pyrolysis to produce biochar has emerged as a sustainable and low-cost strategy for nutrient pollution control. This review explores the potential of biochar derived from agricultural waste as an efficient adsorbent for excess nutrient remediation from aqueous environments. The study highlights the physicochemical properties of biochar that influence its adsorption performance, such as surface area, porosity, functional groups, and inherent mineral content. Unmodified biochars generally exhibit limited nutrient removal efficiency; however, their adsorption performance can be significantly enhanced through surface modifications. These modifications include physical and chemical treatments, incorporation of metals and metal hydroxides, as well as the development of mineral/clay-based and other composite biochars, all of which improve surface functionality and affinity toward target nutrients. Exceptional adsorption capacity was recorded for PO₄³ ⁻ with lanthanum-loaded tobacco biochar (666.67 mg/g), outperforming other reported agro-residue-based derived biochars. Most systems followed pseudo-second-order kinetics and Langmuir isotherms, confirming chemisorption with monolayer coverage. Thermodynamic analysis revealed predominantly spontaneous adsorption, with both exothermic and endothermic processes, and regeneration tests showed stability for up to six cycles without significant performance loss. This review underscores the dual environmental benefit of converting agro-residue into value-added adsorbents while simultaneously addressing eutrophication, advocating for a circular and sustainable approach to water pollution management.

富营养化主要由过量的硝酸铵和磷酸盐进入水生生态系统引起，对水质和生物多样性构成严重威胁。近年来，通过热解生产生物炭的农业残留物已成为一种可持续和低成本的营养物污染控制策略。这篇综述探讨了从农业废弃物中提取的生物炭作为一种有效的吸附剂对水环境中过量的养分进行修复的潜力。该研究强调了影响其吸附性能的生物炭的物理化学性质，如表面积、孔隙度、官能团和固有矿物质含量。未经改性的生物炭通常表现出有限的营养去除效率；然而，通过表面改性可以显著提高其吸附性能。这些修饰包括物理和化学处理，金属和金属氢氧化物的掺入，以及矿物/粘土基和其他复合生物炭的开发，所有这些都改善了表面功能和对目标营养物质的亲和力。PO₄³ -负载镧的烟草生物炭（666.67 mg/g）具有优异的吸附能力，优于其他报道的基于农业残基的衍生生物炭。大多数系统遵循伪二阶动力学和朗缪尔等温线，证实了单层覆盖的化学吸附。热力学分析表明，主要是自发吸附，有放热和吸热过程，再生测试表明，稳定性可达6个循环，没有明显的性能损失。本综述强调了将农业残留物转化为增值吸附剂的双重环境效益，同时解决富营养化问题，倡导循环和可持续的水污染管理方法。

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引用次数: 0

Sulfur migration and transformation during conventional and microwave pyrolysis of sewage sludge 污泥常规热解和微波热解过程中硫的迁移转化

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-11-07 DOI: 10.1016/j.jaap.2025.107461

Fei Wang , Xiaoke Li , Xianggang Lu , Lei Ren , Xiaoyan Yan , Shixiong Zhao , Yu Che , Yuanyuan Zhang

Sewage sludge (SS) pyrolysis is an efficient treatment method reducing sludge volume and promotes its resource utilization, thereby enhance SS valorization. However, sulfur in SS tends to transform into hydrogen sulfide (H₂S) gas during pyrolysis, adversely affecting on the environment. This study investigated the transformation and distribution of sulfur-containing species within three-phase products (char, tar, and gas) obtained from SS via microwave-assisted pyrolysis and conventional pyrolysis across a temperature range of 400–800℃. The products were quantified and characterized using FT-IR, XPS, and GC-MS, techniques. The results indicated that within the 400–800℃ temperature range, microwave pyrolysis resulted in greater sulfur retention in the non-gaseous phases compared to conventional pyrolysis. Nevertheless, the transformation pathways of sulfur-containing functional groups were analogous under both pyrolysis methods. At temperature between 400 and 600℃, unstable thiol structures in the raw SS and aliphatic sulfur-containing compounds in tar underwent continuous cracking with increasing temperature, promoting the release of H₂S. In the 600–700℃ range, aromatic sulfur-containing compounds in tar began decomposition, and small-molecule hydrocarbons, produced from the cracking of aliphatic sulfur compounds, combined with sulfur radicals, thereby generating additional H₂S gas. However, at temperatures exceeding 700℃, thiophene sulfur compounds in conventional pyrolysis started to decompose, whereas these compounds remained largely stable under microwave-assisted pyrolysis. Following density functional theory (DFT) calculations revealed that the thiophene molecule exhibits weak polarity, leading to a limited polarization response under a microwave field. This, in turn, hinders effective energy transfer and consequently suppresses its molecular decomposition process. These findings offer valuable technical support for optimizing pyrolysis processes, reducing H₂S emissions, and promoting the SS resource utilization.

污泥热解是一种有效的处理污泥的方法，减少污泥体积，促进污泥资源化利用，从而提高污泥的价值。然而，SS中的硫在热解过程中容易转化为硫化氢（H₂S）气体，对环境产生不利影响。在400-800℃的温度范围内，通过微波辅助热解和常规热解两种方式，研究了SS热解所得三相产物（炭、焦油和气体）中含硫物质的转化和分布。采用FT-IR、XPS、GC-MS等技术对产物进行定量表征。结果表明，在400 ~ 800℃的温度范围内，微波热解的非气相硫保留率高于常规热解。然而，两种热解方式下含硫官能团的转化途径是相似的。在400 ~ 600℃温度范围内，原料SS中的不稳定硫醇结构和焦油中的脂肪族含硫化合物随着温度的升高而不断发生裂解，促进了H₂S的释放。在600 ~ 700℃范围内，焦油中的芳香族含硫化合物开始分解，脂肪族含硫化合物裂解产生的小分子烃与硫自由基结合，产生额外的H₂S气体。然而，当温度超过700℃时，噻吩类含硫化合物在常规热解下开始分解，而这些化合物在微波辅助热解下基本保持稳定。随后的密度泛函理论（DFT）计算表明，噻吩分子具有弱极性，导致微波场下的极化响应有限。这反过来又阻碍了有效的能量传递，从而抑制了其分子分解过程。这些研究结果为优化热解工艺、降低H₂S排放、促进SS资源化利用提供了有价值的技术支持。

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引用次数: 0

Formation of organosulfur compounds within petroleum reservoirs as a function of organic matter, mineral catalytic effect and thermal maturity: Anhydrous pyrolysis experimental investigations 油气储层中有机硫化合物的形成与有机质、矿物催化作用和热成熟度的关系：无水热解实验研究

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-11-07 DOI: 10.1016/j.jaap.2025.107456

Wenqiang Gao , Suping Ma , Yanqing Xia , Xilong Zhang

Although elemental sulfur is known to induce thermochemical structure alteration of petroleum hydrocarbons, the thermal stability of common hydrocarbons (e.g., alkanes, alkenes, isoprenoids) and fatty acids in the presence of elemental sulfur and organosulfur compounds (OSCs) formed therefrom remains relatively poorly understood. Furthermore, the catalytic effect of minerals, such as montmorillonite, on OSCs formation is also unclear. To address this, a series of confined pyrolysis experiments of n-tetracosane (n-C₂₄), 1-docosene (n-C₂₂-1-ene), pristane (Pr), and octadecanoic acid (OA) with elemental sulfur in the presence or absence of montmorillonite were conducted. The results demonstrate that alkenes are the most reactive, alkanes and fatty acids are less reactive, whereas isoprenoids remain relatively stable in the presence of elemental sulfur at low temperature. The formation of OSCs is controlled by types of original precursor hydrocarbons, thermal maturity and catalytic effect of montmorillonite. Firstly, OSCs derived from different hydrocarbons exhibit both similarities and differences. For instance, thiophenes are formed in all the pyrolysis systems, while thiolanes and thiols are only generated in the pyrolysis involving n-C₂₂-1-ene and OA. Secondly, despite the starting materials used for pyrolysis are different, with the increasing heating temperature, thiols, thiophenes, benzothiophenes (BTs), dibenzothiophenes (DBTs), benzonaphthothiophenes (BNTs), phenyl-dibenzothiophenes (Ph-DBTs) and benzo-bis-benzothiophenes (BBBTs) are progressively formed, suggesting the generation of OSCs is largely determined by thermal maturity. Thirdly, the pyrolysis products in all montmorillonite-free systems are characterized by the generation of more condensed aromatic sulfur compounds when compared to the corresponding montmorillonite-containing systems, indicating that montmorillonite affects OSCs formation, such as retarding OSCs aromatization. Additionally, based on these findings, the influence of the thermochemical reactivity of original precursor hydrocarbons, thermal maturity and montmorillonite on the composition of OSCs and geochemical parameters such as Pr/n-C₁₇ and BTs/DBTs (BDR) ratios are further discussed. Meanwhile, OSCs with higher carbon numbers than starting hydrocarbons are dominant in all the pyrolysis systems at 250 °C, suggesting the intermolecular sulfurization of organic matter may be a preferred process at relatively low temperatures, even within petroleum reservoirs.

虽然已知单质硫会引起石油碳氢化合物的热化学结构改变，但在单质硫和由单质硫形成的有机硫化合物（OSCs）存在下，普通碳氢化合物（如烷烃、烯烃、类异戊二烯）和脂肪酸的热稳定性仍然知之甚少。此外，矿物（如蒙脱土）对OSCs形成的催化作用也不清楚。为了解决这一问题，在蒙脱土存在或不存在的情况下，对正四烷（n-C24）、1-癸烷（n- c22 -1-烯）、癸烷（Pr）和十八烷酸（OA）与单质硫进行了一系列的密闭热解实验。结果表明，烯烃反应最活跃，烷烃和脂肪酸反应较弱，而类异戊二烯在单质硫存在下在低温下保持相对稳定。OSCs的形成受原始前驱烃类型、热成熟度和蒙脱土催化作用的控制。首先，不同烃类衍生的osc既有相似性，也有差异性。例如，噻吩在所有的热解体系中都有生成，而硫烷和硫醇只在有n- c22 -1-烯和OA参与的热解体系中才有生成。其次，尽管热解起始物质不同，但随着加热温度的升高，硫醇类、噻吩类、苯并噻吩类（bt）、二苯并噻吩类（DBTs）、苯并噻吩类（BNTs）、苯基二苯并噻吩类（Ph-DBTs）和苯并-双苯并噻吩类（bbbt）逐渐形成，表明OSCs的生成在很大程度上取决于热成熟度。第三，与含蒙脱石体系相比，所有无蒙脱石体系的热解产物都产生了更多凝聚的芳香族硫化合物，这表明蒙脱石影响了OSCs的形成，如延缓OSCs的芳构化。在此基础上，进一步讨论了原始前驱烃的热化学反应活性、热成熟度和蒙脱土对OSCs组成、Pr/n-C17和BTs/DBTs （BDR）比值等地球化学参数的影响。与此同时，在250°C的所有热解系统中，碳数高于起始烃的osc占主导地位，这表明有机质的分子间硫化可能是相对低温下的首选过程，即使在油藏中也是如此。

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引用次数: 0

Catalytic pyrolysis of diesel derived from paraffinic and intermediate based crude oil over solid base and acid catalysts 固体碱和酸催化剂催化裂解石蜡和中间基原油柴油

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-11-07 DOI: 10.1016/j.jaap.2025.107467

Tong Su , Bohao Li , Guangyao Wang , Chunxiao Gao , Jiming Liu , Jinhong Zhang , Yuanyu Tian

In recent years, the growth of traffic fuel consumption has slowed down, and the problem of overcapacity in refining has become increasingly severe. To achieve value-added utilization of diesel has emerged as one of the most critical challenges for petrochemical enterprises. This study selects the diesel fractions from the paraffinic based Daqing crude oil and the intermediate based Napo crude oil as the research object. Their hydrocarbon compositions and catalytic pyrolysis characteristics are investigated using GC×GC-TOFMS, GC-MS/FID, and fixed bed reactor. Multiple factors such as hydrocarbon composition, pore structures and acidity properties of catalyst, and reaction conditions jointly govern the catalytic pyrolysis behaviors of diesel. Daqing diesel is beneficial for light olefin products, while Napo diesel is more suitable for producing light aromatics. The highest light olefins yield (36.29 wt%) and selectivity (83.37 %) are obtained over ZSM-5 based catalyst (ZSM-5C), while the optimal value (25.89 wt%) for light aromatics (C₆-C₉ aromatics) is reached over USY based FCC catalyst. Due to the enhanced hydrogen transfer and dehydrogenation reactions, the coke yields over FCC catalyst are much higher than other catalysts. Apparent conversion rates of cycloalkanes are apparently higher than alkanes over all catalysts. Alkanes in both diesels undergo near-total conversion over FCC catalyst. The confinement effect within catalyst pores is a critical factor governing the distribution of cracking products. The activation energies for the catalytic pyrolysis of Daqing diesel and Napo diesel are 54.62 kJ/mol and 69.86 kJ/mol.

近年来，交通燃油消费增速放缓，炼油产能过剩问题日益严峻。实现柴油的增值利用已成为石化企业面临的最严峻挑战之一。本研究选取了石蜡基大庆原油和中间基纳泊原油的柴油馏分作为研究对象。利用GC×GC-TOFMS、GC-MS/FID和固定床反应器对其碳氢化合物组成和催化热解特性进行了研究。烃类组成、催化剂的孔隙结构、酸性性质以及反应条件等多种因素共同决定了柴油的催化热解行为。大庆柴油有利于生产轻质烯烃产品，而纳泊柴油更适合生产轻质芳烃产品。ZSM-5基催化剂（ZSM-5C）的轻烯烃收率最高（36.29 wt%），选择性最高（83.37 %），而USY基催化剂的轻芳烃（C6-C9芳烃）收率最高（25.89 wt%）。由于催化裂化催化剂的氢转移和脱氢反应增强，其焦炭收率远高于其他催化剂。在所有催化剂中，环烷烃的表观转化率明显高于烷烃。两种柴油中的烷烃在FCC催化剂上几乎完全转化。催化剂孔内的约束效应是控制裂化产物分布的关键因素。大庆柴油和纳泊柴油催化热解的活化能分别为54.62 kJ/mol和69.86 kJ/mol。

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引用次数: 0

A review of recent trends in graphene-based nanocomposite coatings for enhanced flame retardancy and corrosion protection 综述了石墨烯基纳米复合涂层的最新发展趋势，以增强阻燃和防腐性能

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-11-06 DOI: 10.1016/j.jaap.2025.107457

A. Priyadharshini , JR Xavier

Graphene-based nanocomposite coatings have emerged as advanced materials offering simultaneous flame retardancy and corrosion protection for aerospace applications. Owing to their exceptional thermal stability, impermeability, electrical conductivity, and mechanical robustness, graphene and its derivatives graphene oxide (GO), reduced graphene oxide (rGO), and functionalized graphene act as highly efficient reinforcements for developing multifunctional protective coating systems. This review systematically examines recent progress in graphene-based coatings, correlating structural and interfacial characteristics with mechanisms such as barrier formation, char development, heat dissipation, and electrochemical stabilization. Advances in graphene–polymer and graphene–metal hybrid systems are discussed, emphasizing synergistic formulations, hybrid nanofillers, and heterostructured architectures that enhance performance under aerospace-relevant environments. Particular attention is given to multifunctional coatings integrating dual flame-retardant and anticorrosive capabilities through interfacial engineering and hybrid nanostructure design. Despite notable progress, challenges such as dispersion uniformity, large-scale processability, and long-term stability remain. Future strategies involving chemical functionalization, sustainable processing, and data-driven material design are proposed to overcome these limitations. Overall, this review provides a comprehensive and coherent perspective on graphene-based coatings as sustainable, lightweight, and high-performance solutions for next-generation aerospace protection.

石墨烯基纳米复合涂层是一种先进的材料，可同时提供阻燃和防腐，用于航空航天应用。由于石墨烯及其衍生物氧化石墨烯（GO）、还原氧化石墨烯（rGO）和功能化石墨烯具有优异的热稳定性、不渗透性、导电性和机械稳健性，因此石墨烯及其衍生物氧化石墨烯（GO）可作为开发多功能保护涂层系统的高效增强剂。本文系统地回顾了石墨烯基涂层的最新进展，并将其结构和界面特性与屏障形成、炭的形成、散热和电化学稳定等机制联系起来。讨论了石墨烯-聚合物和石墨烯-金属杂化体系的进展，重点介绍了协同配方、杂化纳米填料和异质结构体系，以提高航空航天相关环境下的性能。特别关注通过界面工程和混合纳米结构设计集成双重阻燃和防腐能力的多功能涂层。尽管取得了显著进展，但分散均匀性、大规模可加工性和长期稳定性等挑战仍然存在。未来的策略包括化学功能化、可持续处理和数据驱动的材料设计，以克服这些限制。总的来说，这篇综述为石墨烯基涂层作为下一代航空航天防护的可持续、轻量化和高性能解决方案提供了全面和连贯的视角。

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引用次数: 0

Research progress on pyrolysis and resource utilisation of waste plastics: Methods, mechanisms, influencing factors, and future prospects 废塑料热解与资源化利用的研究进展：方法、机理、影响因素及展望

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-11-06 DOI: 10.1016/j.jaap.2025.107459

Ying Qin , Zhipu Wang , Fei Yang , Dean Wang , Wei Liu , Daoren Hanikai , Jian Liu , Jiabin Zhou , Dan Liu

The massive accumulation of waste plastics poses a severe threat to the global ecological environment. Pyrolysis—capable of converting such waste into high-value products, including fuel oil, syngas, and chemicals—stands as one of the key pathways to realise a plastic circular economy. This paper systematically reviews the research progress in waste plastic pyrolysis and its resource utilisation potential, covering reaction mechanisms, method classifications, influencing factors, and the current status of industrialisation. It first introduces the classification, production growth trends, environmental and health hazards of waste plastics, alongside existing resource utilisation technologies, and explicitly identifies pyrolysis as the core chemical recycling route; subsequently elaborates on pyrolysis mechanisms, method types, and key influencing factors, while conducting a comparative analysis of the current industrialisation status and intellectual property landscapes both domestically and internationally; finally highlights that catalytic pyrolysis confronts challenges such as poor catalyst stability, high industrialisation costs, and low product added value, and concludes by proposing that efforts should focus on the development of low-cost, high-efficiency catalysts, optimisation of process parameters, and promotion of its application in fuel production and feedstock manufacturing fields, thereby contributing to the advancement of the plastic circular economy.

废塑料的大量堆积对全球生态环境构成严重威胁。热解——能够将这些垃圾转化为高价值产品，包括燃料油、合成气和化学品——是实现塑料循环经济的关键途径之一。本文系统地综述了废塑料热解的研究进展及其资源化利用潜力，包括反应机理、方法分类、影响因素和产业化现状。首先介绍了废塑料的分类、产量增长趋势、对环境和健康的危害，以及现有的资源利用技术，并明确指出热解是核心的化学回收途径；随后阐述热解机理、热解方法类型、热解关键影响因素，并对国内外工业化现状和知识产权格局进行对比分析；最后指出催化热解还面临催化剂稳定性差、工业化成本高、产品附加值低等挑战，并提出应重点开发低成本、高效的催化剂，优化工艺参数，促进其在燃料生产和原料制造领域的应用，从而为推进塑料循环经济做出贡献。

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引用次数: 0

A combined gas and catalytic-phase kinetic model for ex-situ catalytic pyrolysis of polyethylene 聚乙烯非原位催化热解气相联合动力学模型

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-11-06 DOI: 10.1016/j.jaap.2025.107462

Yannick Ureel, Maarten K. Sabbe, Kevin M. Van Geem

Ex-situ catalytic pyrolysis is a highly promising process to convert post-consumer polyolefin waste into valuable chemicals such as ethylene and propylene. These valuable olefins are a feedstock to produce new virgin plastics, hence closing the loop in the plastic lifecycle. This chemical recycling process offers many benefits over other processes, such as thermal pyrolysis, as it has a higher recycling and energy efficiency. To further examine and optimize this process, a detailed kinetic model is essential to reveal dominant reaction pathways, optimize process conditions, and expedite reactor and catalyst design. Here, a novel modeling framework is presented that explicitly considers the important elementary reactions in both the catalyst and gas-phase and accounts for all species in the plastic pyrolysis oil as catalytic cracking feedstock. This was achieved by efficiently using the state-of-the-art microkinetic model generator Genesys-Cat, an improved Bayesian optimization scheme, and incorporating a fundamental gas-phase cracking model. In this way, a kinetic model accurately describing the catalytic pyrolysis of polyethylene over phosphorus-modified mesoporous ZSM-5 between 500 and 700 °C was obtained. As a result, we could reveal the relative contribution of gas-phase and catalytic reactions, present the dominant reaction pathways, and optimize the process conditions. These advancements benefit both the ecological and economic potential of ex-situ catalytic pyrolysis to recycle plastic waste.

非原位催化热解是一种非常有前途的过程，将消费后的聚烯烃废物转化为有价值的化学品，如乙烯和丙烯。这些有价值的烯烃是生产新塑料的原料，因此关闭了塑料生命周期的循环。与热裂解等其他工艺相比，这种化学回收工艺具有许多优点，因为它具有更高的回收利用率和能源效率。为了进一步研究和优化这一过程，详细的动力学模型对于揭示主要反应途径、优化工艺条件以及加快反应器和催化剂的设计至关重要。本文提出了一种新的模型框架，明确考虑了催化剂和气相中重要的基本反应，并考虑了作为催化裂化原料的塑料热解油中的所有物质。这是通过高效地使用最先进的微动力学模型生成器Genesys-Cat、改进的贝叶斯优化方案以及基本的气相裂解模型来实现的。通过这种方法，得到了一个准确描述磷修饰的介孔ZSM-5在500 ~ 700 °C之间催化热解聚乙烯的动力学模型。研究结果揭示了气相反应和催化反应的相对贡献，提出了主要的反应途径，并对工艺条件进行了优化。这些进步有利于非原位催化热解回收塑料废物的生态和经济潜力。

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引用次数: 0