Journal of Analytical and Applied Pyrolysis最新文献_第3页

Rich hydrogen syngas production from microwave-assisted catalytic pyrolysis of polypropylene plastic particles 微波辅助催化热解聚丙烯塑料颗粒制备富氢合成气

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-18 DOI: 10.1016/j.jaap.2026.107628

Zhihong Liu , Tao Liu , Wenke Zhao , Yaning Zhang , Wei Liu

Plastics bring convenience to human life, but also cause serious environmental pollution. The recycling of waste plastics is an effective way to solve the current energy shortage and environmental pollution. Microwave is widely used in the field of waste plastic pyrolysis due to its high heating rate, minimal heat loss, and less pollution in the heating process. In this study, cobalt oxide was used as microwave absorber and catalyst, the hydrogen production characteristics of microwave-assisted pyrolysis of polypropylene (PP) plastic particles were investigated. The results showed that microwave-assisted pyrolysis results in more hydrogen production. The hydrogen volume fraction, hydrogen yield, and hydrogen efficiency all increased continuously with increasing reaction temperature, reaching 68.2 vol%, 28.8 mmol/g_PP, and 38.4 % at 850 °C, respectively. With the increase of microwave power and Co₃O₄/PP mass ratio, the hydrogen volume fraction, hydrogen yield and hydrogen efficiency increased first and then decreased, and they reached the highest value when the microwave power was 500 W and the Co₃O₄/PP mass ratio was 1 at 850 °C. When the microwave power was greater than 500 W or the Co₃O₄/PP mass ratio was greater than 1, the heating rate of the polypropylene plastic particles was too high, reducing the selectivity of the Co₃O₄ for hydrogen production, resulting in lower hydrogen production. The role of Co₃O₄ in microwave-assisted pyrolysis of plastics is manifested in two aspects. On the one hand, its magnetic loss generates a large amount of thermal energy, providing a high-temperature environment for the pyrolysis of plastics; on the other hand, it adsorbs small molecules of gaseous hydrocarbons and promotes the polarization fracture of the C-H bond to produce hydrogen.

塑料给人类生活带来便利的同时，也造成了严重的环境污染。废塑料的回收利用是解决当前能源短缺和环境污染的有效途径。微波因其加热速度快、热损失小、加热过程中污染少等优点被广泛应用于废塑料热解领域。本研究以氧化钴为微波吸收剂和催化剂，研究了微波辅助热解聚丙烯（PP）塑料颗粒的产氢特性。结果表明，微波辅助热解能产生更多的氢。随着反应温度的升高，氢气体积分数、氢气产率和氢气效率不断增加，850℃时分别达到68.2 vol%、28.8 mmol/gPP和38.4 %。随着微波功率和Co3O4/PP质量比的增大，氢体积分数、产氢率和氢效率先增大后减小，在850℃时，当微波功率为500 W、Co3O4/PP质量比为1时达到最大值。当微波功率大于500 W或Co3O4/PP质量比大于1时，聚丙烯塑料颗粒的升温速率过高，降低了Co3O4产氢的选择性，导致产氢量降低。Co3O4在塑料微波热解中的作用表现在两个方面。一方面，它的磁损失产生大量的热能，为塑料的热解提供了高温环境；另一方面，它吸附气态烃的小分子，促进C-H键的极化断裂生成氢。

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引用次数: 0

Integrated CaO–zeolite dual catalyst for selective pyrolysis of antibiotic-laden sludge: Coupling pollutant detoxification with resource recovery 一体化曹-沸石双催化剂选择性热解含抗生素污泥：污染物解毒与资源回收的耦合

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-17 DOI: 10.1016/j.jaap.2026.107627

Dajie Jia , Jingyong Liu , Zhibin Chen , Leyao Tao , Liangzhong Li , Fatih Evrendilek , Yao He , Tao Chen , Xin Chen , Wuming Xie

Antibiotic-laden sludge (AS) poses severe environmental risks due to its elevated concentrations of antibiotics and antibiotic resistance genes (ARGs). This study developed a novel dual catalyst by integrating CaO with hierarchical HZSM-5 and Hβ zeolites to modulate AS pyrolysis products, simultaneously addressing sludge reduction and detoxification. The zeolite catalysts optimized reaction pathways through shape-selective catalysis, thus significantly enhancing process controllability, as evidenced by a reduction in combined pyrolysis index (%³·min⁻²·°C⁻³) from 2.83 × 10⁻⁵ (non-catalytic) to a range of 0.34–0.60 × 10⁻⁵. Alkali-treated AZ/Si and Aβ/Si catalysts exhibited optimal activity (0.60–0.63 %/min·°C), attributed to their hierarchical mesoporous structures, enhancing macromolecular reactant adsorption and diffusion. Temperature-response analysis revealed altered release sequences of gaseous products, elucidating the role of the catalysts in directing pyrolysis pathways, governing functional group decomposition, and enhancing product selectivity. Non-catalytic pyrolysis primarily generated fatty acids (62.48 %) via triglyceride hydrolysis and decarboxylation, and nitrogenous compounds (18.49 %) from residual antibiotic and protein degradation. Alkali-modified catalysts promoted deoxygenation: fatty acids decreased by 30.42 %, whereas hydrocarbons increased by 27.34 %. CaO further improved product distribution by shifting reaction equilibrium toward hydrocarbon production, modulating N transformation pathways, and altering product molecular configurations. This integrated pyrolysis process enabled efficient detoxification via the degradation of residual antibiotics and the thermal deactivation of ARGs, thus mitigating the primary environmental risks of AS. This study presents a new paradigm for coupling hazardous waste detoxification with the catalytic generation of high-value chemicals.

含抗生素污泥由于其抗生素和抗生素耐药基因（ARGs）的浓度升高而造成严重的环境风险。本研究开发了一种新型的双催化剂，通过将CaO与层次化HZSM-5和Hβ沸石结合来调节AS热解产物，同时解决污泥减量和解毒问题。沸石催化剂通过形状选择性催化优化了反应途径，从而显著提高了过程的可控制性，将热解指数（%³·min⁻²·°C⁻³）从2.83 × 10 -⁻（非催化性）降低到0.34-0.60 × 10 -⁻。碱处理的AZ/Si和Aβ/Si催化剂表现出最佳的活性（0.60-0.63 %/min·°C），这归功于它们的分层介孔结构，促进了大分子反应物的吸附和扩散。温度响应分析揭示了气态产物释放序列的改变，阐明了催化剂在指导热解途径、控制官能团分解和提高产物选择性方面的作用。非催化热解主要通过甘油三酯水解和脱羧生成脂肪酸（62.48 %），通过残留的抗生素和蛋白质降解生成氮化合物（18.49 %）。碱改性催化剂促进脱氧：脂肪酸减少30.42 %，而烃类增加27.34 %。CaO通过将反应平衡向产烃方向转移、调节N转化途径和改变产物分子构型，进一步改善了产物分布。这种综合热解过程通过降解残留抗生素和ARGs的热失活实现了有效的解毒，从而减轻了AS的主要环境风险。这项研究提出了一个新的范例耦合危险废物解毒与催化生成高价值的化学品。

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引用次数: 0

Mesophase transformation of petroleum pitch in the confined space 石油沥青在密闭空间中的中间相转变

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-17 DOI: 10.1016/j.jaap.2026.107625

Dong Huang , Weijie Song , Gui Wang , Kui Shi , Tongqi Li , Huafeng Quan , Yuefeng Zhang , Jinshui Liu , Chong Ye

Mesophase transformation of pitch occurs prior to carbonization and critically influences the microstructure and properties of the resulting carbon. However, most studies focus on open systems, and the behavior and mechanism of mesophase transformation under confinement remain poorly understood. In this study, the mesophase transformation of petroleum pitch was investigated using different graphite microcolumns to simulate confined spaces of fiber preforms with controlled surface and geometric characteristics. The results indicate that active sites on confined space surfaces capture pitch molecules and promote their ordered stacking, thereby accelerating mesophase transformation. Meanwhile, increasing surface defect density further enhances this confinement-induced promotion. The geometric factor (S/V) of the confined space critically influences the transformation efficiency. When the S/V ratio increases from 0.015 mm⁻¹ to 0.064 mm⁻¹, the mesophase transformation rate of isotropic pitch sharply rises from 19 % to 100 % within 2 h. These findings offer both theoretical insight and practical guidance for controlling mesophase transformation to improve the performance of high-thermal-conductivity carbon/carbon composites.

沥青的中间相转变发生在炭化之前，并严重影响所得碳的微观结构和性能。然而，大多数研究都集中在开放体系上，对约束条件下中间相转变的行为和机制了解甚少。在本研究中，利用不同的石墨微柱模拟具有可控表面和几何特性的纤维预制体的密闭空间，研究了石油沥青的中间相转变。结果表明，有限空间表面上的活性位点捕获沥青分子并促进其有序堆积，从而加速中间相转变。同时，表面缺陷密度的增加进一步增强了这种约束诱导的促进作用。密闭空间的几何因子（S/V）对转换效率有重要影响。当S/V比从0.015 mm−1增加到0.064 mm−1时，各向同性沥青的中间相转化率在2 h内从19 %急剧上升到100 %。这些发现为控制中间相转变以提高高导热碳/碳复合材料的性能提供了理论见解和实践指导。

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引用次数: 0

Microwave-driven spinel nucleation mechanisms for multi-heavy metals stabilization in co-pyrolysis of electroplating sludge and red mud 电镀污泥与赤泥共热解中多重金属稳定的微波驱动尖晶石成核机理

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-17 DOI: 10.1016/j.jaap.2026.107626

Junhao Lin , Yanxi Liu , Jiashan Chen , Yanan You , Mingxing Chen , Wei Zhang , Xu Kang , Xue Xu , Jiyun Xu , Biyu Zhang , Shichang Sun

The coexistence of mobile Zn, Ni, Cu and Cr in electroplating sludge necessitates innovative stabilization approaches for safe resource recovery. This study develops a microwave-assisted co-pyrolysis process using red mud as synergistic reactant, achieving higher immobilization ratio (>90 %) for multi-heavy metals (HMs) through spinel phase transformation. According to the risk assessment criteria, the HMs in the stabilized products could reduce from “high risk” to “low risk”. The iron oxide (Fe₂O₃) in red mud selectively facilitated the formation of spinel structures through high-temperature solid-phase reactions with Zn, Ni and Cu, where lattice confinement effects substantially inhibited HMs leaching. Notably, there was a competitive relationship among the immobilization of HMs due to differences in the Gibbs free energy of the reactions (ZnFe₂O₄ > NiFe₂O₄ > CuFe₂O₄). Comparative experiments using simulated substances revealed that microwave pyrolysis was more favorable for the formation of spinel structures. Microwave irradiation generates localized thermal gradients that enhanced faster spinel nucleation than conventional heating in a shorter time. This study reveals the mechanisms of the reaction between HMs and metal oxides to form spinels during microwave pyrolysis, providing new insights into the resource utilization of industrial solid wastes.

由于锌、镍、铜、铬在电镀污泥中同时存在，需要创新稳定方法来实现资源的安全回收。本研究开发了一种以赤泥为增效原料的微波辅助共热解工艺，通过尖晶石相变对多种重金属（hm）实现了较高的固定化率（>90 %）。根据风险评价标准，稳定产品的HMs可由“高风险”降至“低风险”。赤泥中的氧化铁（Fe2O3）通过与Zn、Ni和Cu的高温固相反应选择性地促进尖晶石结构的形成，其中晶格约束效应显著地抑制了HMs浸出。值得注意的是，由于反应（ZnFe2O4 > NiFe2O4 > CuFe2O4）的吉布斯自由能不同，HMs的固定存在竞争关系。模拟物质对比实验表明，微波热解更有利于尖晶石结构的形成。微波辐照产生局部热梯度，使尖晶石在较短时间内比常规加热更快地成核。本研究揭示了微波热解过程中HMs与金属氧化物反应形成尖晶石的机理，为工业固体废弃物资源化利用提供了新的思路。

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引用次数: 0

Gallium and self-nitrogen co-doped algal biochar catalysts for selective production of monoaromatic hydrocarbons from microalgae pyrolysis 镓和自氮共掺杂藻类生物炭催化剂用于微藻热解选择性生产单芳烃

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-16 DOI: 10.1016/j.jaap.2026.107622

Ruihan Dong, Yang Yang, Haiping Yang, Ziyue Tang, Xianhua Wang, Yingquan Chen, Hanping Chen

Catalytic pyrolysis of microalgae to produce monocyclic aromatic hydrocarbons (MAHs) represents a promising route for sustainable aromatic chemical production. In this study, a gallium and self-nitrogen co-doped algae-derived activated carbon (Ga/N-SAC) catalyst was synthesized and applied to Spirulina pyrolysis. Catalytic pyrolysis experiments showed that the catalyst containing 5 wt% Ga and used at a catalyst-to-biomass mass ratio of two exhibited the optimal performance. Ga/N-SAC increased the relative content of benzene, toluene, and xylene (BTX) to 51.33 %, with selectivities of 10.51 % for benzene, 50.27 % for toluene, and 12.15 % for xylene. The pyridinic-N and pyrrolic-N functionalities facilitated the deoxygenation and deamination of heteroatom-rich intermediates, while Ga-derived Lewis acid sites promoted dehydrogenation, cyclization, and aromatization pathways. The hierarchical pore structure of Ga/N-SAC further enhanced mass transfer and strengthened vapor–catalyst interactions, enabling efficient upgrading of pyrolysis vapors. This strong synergy between nitrogen functionalities and Ga species significantly enhanced MAHs formation while suppressing oxygenated and nitrogen-containing by-products. Ga/N-SAC serves as an efficient and cost-effective catalyst for microalgae-derived BTX and provides a useful framework for developing metal–nitrogen co-doped carbon catalysts.

微藻催化热解生产单环芳烃（MAHs）是一种很有前途的可持续芳香化工生产途径。本研究合成了一种镓自氮共掺杂藻类衍生活性炭（Ga/N-SAC）催化剂，并将其应用于螺旋藻热解。催化热解实验表明，含5 wt% Ga的催化剂在催化剂与生物质质量比为2时表现出最佳性能。Ga/N-SAC使苯、甲苯和二甲苯的相对含量（BTX）提高到51.33 %，对苯的选择性为10.51 %，对甲苯的选择性为50.27 %，对二甲苯的选择性为12.15 %。吡啶- n和吡咯- n官能团促进了富杂原子中间体的脱氧和脱胺反应，而ga衍生的Lewis酸位点促进了脱氢、环化和芳构化反应。Ga/N-SAC的层次化孔隙结构进一步增强了传质，加强了蒸汽-催化剂的相互作用，实现了热解蒸汽的高效升级。氮官能团和Ga之间的强大协同作用显著增强了MAHs的形成，同时抑制了含氧和含氮副产物。Ga/N-SAC作为一种高效、经济的微藻源BTX催化剂，为开发金属-氮共掺杂碳催化剂提供了有益的框架。

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引用次数: 0

A novel alkali fusion approach to convert coal gangue into silk-like zeolite and hierarchical porous carbon for CO₂ capture and energy harvesting 一种新的碱熔融方法将煤矸石转化为丝状沸石和分层多孔碳，用于CO 2捕获和能量收集

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-16 DOI: 10.1016/j.jaap.2026.107620

Jianglong Li , Jie Wu , Yunchao Li , Ao Song , Jiafeng Fan , Guangxue Zhang

In order to achieve the efficient and value-added use of coal gangue, this work proposes a novel "alkali fusion–dissolution–separation" strategy to fractionate coal gangue into inorganic and organic components. The inorganic component is converted into silk-like zeolitic (SLZ) material for CO₂ capture, while the organic phase is transformed into hierarchical porous carbon (HPC) for energy storage and triboelectric nanogenerators (TENGs). The SLZ exhibits a CO₂ adsorption capacity of 2.33 mmol g⁻¹, with adsorption following the Freundlich model, indicating multilayer chemisorption driven by Na⁺ complexation and CO₂ hydration. HPC, with a specific surface area of 563.1 m² g⁻¹ and 96.2 % microporosity, demonstrates a capacitance of 117 F g⁻¹ at 0.5 A g⁻¹, with 97.5 % arising from pseudocapacitance. The HPC-based TENG generates a peak voltage of 411 V and a short-circuit current of 4.96 μA under 45 N force at 5 Hz. This work provides a novel strategy for converting coal gangue into value-added functional materials to promote its sustainable use.

为了实现煤矸石的高效增值利用，本文提出了一种新的“碱熔融-溶解-分离”策略，将煤矸石分馏为无机组分和有机组分。无机组分转化为丝状沸石（SLZ）材料用于CO₂捕获，而有机相转化为分层多孔碳（HPC），用于储能和摩擦电纳米发电机（teng）。SLZ的CO 2吸附量为2.33 mmol g⁻¹，吸附遵循Freundlich模型，表明Na +的络合作用和CO 2水合作用驱动了多层化学吸附。HPC的比表面积为563.1 m² g⁻¹，微孔隙率为96.2 %，其电容值为117 F g⁻¹，0.5 a g⁻¹，其中97.5 %为赝电容。在5 Hz、45 N的力作用下，基于hpc的TENG产生的峰值电压为411 V，短路电流为4.96 μA。本研究为将煤矸石转化为增值功能材料，促进其可持续利用提供了一种新的策略。

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引用次数: 0

Interfacial oxygen vacancies and Cu-Ni bimetallic sites synergistically enhance the catalytic hydroconversion of soluble portion from lignite thermal dissolution 界面氧空位和Cu-Ni双金属位点协同促进褐煤热溶可溶部分的催化加氢转化

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-16 DOI: 10.1016/j.jaap.2026.107623

Zong-Pin Fu , Yun-Peng Zhao , Yu-Fa Wu , Qi-Jie Zhou , Shu-Ting Hu , Le-Le Qiu , Fang-Jing Liu , Mei Zhong , Jing Liang , Jing-Pei Cao

Mild thermal dissolution is an effective method for the clean, low-carbon conversion of lignite. However, the resulting products still contain numerous oxygen-bridged bonds and heavy molecular compounds, requiring further upgrading to serve as suitable feedstocks for fuels and chemicals. In this study, a supported Cu-Ni bimetallic catalyst was synthesized via a co-precipitation method and applied to the catalytic hydroconversion (CHC) of thermal dissolution portions from Zhaotong lignite (ZT) and lignite-related model compounds (LRMCs). Catalyst characterization revealed that metal particles were uniformly dispersed on the surface of the Cu-Ni/CoOx-CeO₂ catalyst, along with the formation of defect sites. The CoOx-CeO₂ support promoted surface oxygen vacancy formation. Furthermore, the incorporation of Ni altered the local coordination environment of Cu species through multicomponent interactions. The synergy between interfacial oxygen vacancies and Cu-Ni bimetallic sites significantly enhanced catalytic activity. Tests with LRMCs indicated that the Cu-Ni/CoOx-CeO₂ catalyst selectively cleaves C-O ether bonds under mild conditions, exhibiting both high selectivity and strong hydrogenation activity in the CHC of phenolic compounds. The catalyst also effectively promoted the CHC of macromolecular species in the soluble portion from ZT thermal dissolution, thereby converting phenolic compounds into cycloalkanol. These finding provides valuable insights for developing staged conversion routes and achieving value-added utilization of lignite.

温和热溶是褐煤清洁低碳转化的有效方法。然而，最终的产品仍然含有大量的氧桥键和重分子化合物，需要进一步升级才能作为燃料和化学品的合适原料。本研究采用共沉淀法合成了负载型Cu-Ni双金属催化剂，并将其应用于昭通褐煤（ZT）和褐煤相关模型化合物（LRMCs）热溶部分的催化加氢转化（CHC）。催化剂表征表明，Cu-Ni/CoOx-CeO2催化剂表面均匀分布有金属颗粒，并形成缺陷位点。CoOx-CeO2载体促进了表面氧空位的形成。此外，Ni的加入通过多组分相互作用改变了Cu的局部配位环境。界面氧空位与Cu-Ni双金属位之间的协同作用显著提高了催化活性。lrmc实验表明，Cu-Ni/CoOx-CeO2催化剂在温和条件下选择性地裂解C-O醚键，对酚类化合物的CHC具有高选择性和较强的加氢活性。该催化剂还能有效促进ZT热溶可溶部分大分子物质的CHC，从而将酚类化合物转化为环烷醇。这些发现为开发分阶段转化路线和实现褐煤的增值利用提供了有价值的见解。

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引用次数: 0

Pyrolysis mechanism of 2-chloroacetophenone: Single pulse shock tube experimental and kinetic modeling 2-氯苯乙酮热解机理：单脉冲激波管实验与动力学模拟

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-16 DOI: 10.1016/j.jaap.2026.107619

Lin Yang , Hao Sun , Xuefeng Liu , Xin Gao , Su Wang , Xiqiang Gai , Haitao Wang

The experimental and kinetic modeling investigation of the pyrolysis of 2-Chloroacetophenone (CN) were studied by single pulse shock tube in the temperature range of 1084–1706 K. Twelve pyrolysis products were identified and quantified, such as carbon monoxide, acetylene, hydrogen chloride, benzene, chlorobenzene, etc. As pyrolysis temperature over 1377 K, the concentration of acetylene exhibited a substantial increase, whereas the concentrations of benzene and chlorobenzene declined. The overall rate constant for pyrolysis of CN was found to be k = 10^{(3.15 ± 0.11)} · e^{(−18201.21 ± 2083.61) / RT}. A detailed kinetic model of CN pyrolysis process was developed and validated against the results of experiments and theoretical calculations. The dissociation reactions of the C–Cl bond, and the H-abstraction reactions on the branched chain, were the main channels of CN decomposition by calculations.

采用单脉冲激波管在1084 ~ 1706 K温度范围内对2-氯苯乙酮（CN）的热解进行了实验和动力学建模研究。对一氧化碳、乙炔、氯化氢、苯、氯苯等12种热解产物进行了鉴定和量化。当热解温度超过1377 K时，乙炔的浓度大幅上升，而苯和氯苯的浓度则下降。得到CN热解的总速率常数为k = 10（3.15 ± 0.11）·e(−18201.21±2083.61)/ rt。建立了CN热解过程的详细动力学模型，并根据实验和理论计算结果进行了验证。C-Cl键的解离反应和支链上的吸氢反应是CN分解的主要通道。

引用次数: 0

Enhancing lignin extraction and enzymatic hydrolysis from corn straw via surfactant-assisted hydrothermal pretreatment 表面活性剂辅助水热预处理对玉米秸秆木质素提取及酶解的影响

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-16 DOI: 10.1016/j.jaap.2026.107621

Yao Tong , Tianhua Yang , Jian Wang , Bingshuo Li , Haijun Zhang , Rundong Li

To improve the enzymatic hydrolysis of corn straw (CS), the effects of three surfactants (Span80, CTAB and SDBS) combined with hydrothermal pretreatment on the enzymatic hydrolysis of lignin extraction from CS were comprehensively investigated, and the structural and thermochemical transformation characteristics of the extracted lignin were analyzed. The results showed that the addition of surfactants significantly increased the content of reducing sugar produced by hydrolysis of CS in the pretreatment stage, with CTAB having the most pronounced promotional effect. Further, cellulase hydrolysis was investigated under the optimal pretreatment conditions (5 % CTAB, 120 °C, 0.5 h), up to 41.72 % of hydrolyzed reducing sugar was obtained, which was 310.5 % higher than that of without pretreatment. The yield of lignin was over 65 % with the purity of 31.22 %. Meanwhile, the combined pretreatment altered the structure of lignin, resulting a higher maximum decomposition temperature and a more stable structure, while retaining the active groups of natural lignin in CS and promoting the enrichment phenols, acids and ketones in the pyrolysis products. Hierarchical cluster analysis further revealed a significant synergistic effect between the introduction of CTAB and the medium-high temperatures (500–550 °C) pyrolysis conditions, which collectively dominated the selective generation of high-value phenolic compounds.

为提高玉米秸秆酶解性能，综合考察了三种表面活性剂（Span80、CTAB和SDBS）联合水热预处理对玉米秸秆酶解提取木质素的影响，分析了提取木质素的结构和热化学转化特性。结果表明，在预处理阶段，表面活性剂的加入显著提高了CS水解产生的还原糖含量，其中CTAB的促进作用最为显著。在最佳预处理条件（5 % CTAB, 120°C, 0.5 h）下，纤维素酶水解率为41.72 %，比未预处理提高了310.5 %。木质素得率达65% %以上，纯度为31.22 %。同时，联合预处理改变了木质素的结构，使木质素的最高分解温度更高，结构更稳定，同时保留了CS中天然木质素的活性基团，促进了热解产物中酚类、酸类和酮类的富集。分层聚类分析进一步揭示了CTAB的引入与中高温（500-550℃）热解条件之间存在显著的协同效应，共同主导了高值酚类化合物的选择性生成。

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引用次数: 0

Microplastics quantification in organic-rich samples: The relevance of testing substrate-specific calibration curves 富有机物样品中的微塑料定量：检测底物特异性校准曲线的相关性

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-16 DOI: 10.1016/j.jaap.2026.107624

Medina Veliu , Joeri Kaal , Tiago De Oliveira , Asier Goñi-Urtiaga , Denis Courtier-Murias , Liliane Jean-Soro , Johnny Gasperi , Marco Panettieri

Urban agriculture could rely on waste-based substrates, but potential contaminants such as microplastics should be evaluated for safe public use. However, quantifying microplastics in these substrates is challenging due to their high organic matter content, which is difficult to remove completely, leading to interfering compounds and unreliable results. This study investigated the underexplored effects of organic matter on microplastics quantification employing pyrolysis-GC-MS. Natural organic matter (NOM) removal methods were tested on organic-rich peat-based substrate, reaching up to 46 % of reduction with Fenton’s reaction. Then, calibration curves were prepared in two inorganic matrices, silicon dioxide and glass fiber powders, for high density polyethylene (HDPE), polyethylene terephthalate (PET), polypropylene (PP), polystyrene (PS), and polyvinyl chloride (PVC) across nine concentrations, from 0.01 to 10 µg/mg, adding polyflurostyrene (PFS) as internal standard. The selectivity of several polymer pyrolytic markers was compared. Polymer-spiked samples were subjected to Fenton’s oxidation and quantified with both inorganic calibration curves, overestimating polymer contents, up to four times for PET and PVC. The preparation of a third calibration curve, specific for peat, improved results for PS, but not for PP, PET, and PVC. For the first time, the three calibration curves were tested on untreated polymer-spiked (HDPE, PP, PS) waste-based substrates, and resulted in a better estimation closer to the expected polymer concentrations when substrates closely matched the curve’s matrix composition. The comparison of three calibration curves made with different matrices showed that the quantification of plastic polymers in organic-rich samples could be improved using matrix-specific calibration curves even without a complete NOM removal. This represents a novel methodological approach for plastic polymers quantification in complex matrices, minimizing the sample pretreatment that could cause the loss of nanoparticles during filtration, evidencing that matrix similarity is key for reliable quantification in NOM-rich samples, even without its complete removal.

都市农业可以依赖以废物为基础的基质，但应评估微塑料等潜在污染物是否安全用于公共用途。然而，量化这些基质中的微塑料是具有挑战性的，因为它们的有机物含量高，难以完全去除，导致干扰化合物和不可靠的结果。本研究利用热解-气相色谱-质谱法研究了有机质对微塑料定量的影响。天然有机物（NOM）去除方法在富有机质泥炭基基质上进行了试验，Fenton反应的去除率高达46% %。然后，在二氧化硅和玻璃纤维粉两种无机基质中，以聚苯乙烯（PFS）为内标，对高密度聚乙烯（HDPE）、聚对苯二甲酸乙二醇酯（PET）、聚丙烯（PP）、聚苯乙烯（PS）和聚氯乙烯（PVC）在0.01 ~ 10 µg/mg范围内的9种浓度制备校准曲线。比较了几种聚合物热解标记物的选择性。聚合物加标样品经Fenton氧化并用两种无机校准曲线进行定量，对PET和PVC的聚合物含量高估了4倍。编制第三条校准曲线，专门用于泥炭，改进了PS的结果，但没有用于PP， PET和PVC。首次在未经处理的聚合物加标（HDPE， PP， PS）废物基基质上测试了这三条校准曲线，当基质与曲线的基质组成密切匹配时，得到了更接近预期聚合物浓度的更好的估计。通过对三种不同基质的校准曲线的比较表明，即使不完全去除NOM，使用基质特异性校准曲线也可以提高富有机样品中塑料聚合物的定量。这代表了复杂基质中塑料聚合物定量的一种新方法，最大限度地减少了可能导致过滤过程中纳米颗粒损失的样品预处理，证明基质相似性是富氮氧化物样品可靠定量的关键，即使没有完全去除。

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