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

Enhanced waste-to-fuel gas conversion via co-pyrolysis of purified terephthalic acid sludge ash and phoenix tree’s leaves 利用纯化对苯二甲酸污泥灰和梧桐树叶共热解提高废物制气转化率

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-21 DOI: 10.1016/j.jaap.2026.107639

Zhou Yang , Hanchuan Liu , Yongjuan Zhao , Shiyi Ye , Yulong Liang , Hongyu Zhao , Xinxin Xing , Xiaoyuan Wang , Yinfeng Wang

Purified terephthalic acid (PTA) production generates substantial sludge, which is characterized by the high content of metal elements (such as Ca, Co and Mn) in the ash, classifying it as a hazardous organic waste. This study comprehensively investigated the synergistic pyrolysis of PTA sludge ash (PTASA) and phoenix tree’s leaves (PTL) for syngas production. Through systematic characterisation of the physicochemical properties of PTASA and PTL, combined with thermal degradation behavior analysis and pyrolysis experiments, the aim was to determine the optimal conditions for producing high-value gas. The results showed that when the mixing ratio of PS850 (PTASA calcinated at 850℃) reached 30 %, the values of total mass loss (TML) and comprehensive pyrolysis index (CPI) as well as the quality of syngas have reached the best level. In addition, compared with PTL mono-pyrolysis, adding PTASA could increase the total volatile products by 16.4 %, owing to the cooperative pyrolysis for CO, CC and C-O groups. Moreover, in-situ co-pyrolysis proved superior to ex-situ conditions for hydrogen-rich gas production. The PTASA calcined at 750°C(PS750) exhibited the most pronounced catalytic effect with stable microstructure and excellent metal mineral composition, and the total effective gas (CO + H₂ + CH₄) yields of 442.52 mL/g, which was 4 % higher than that of the co-pyrolysis process of PS850 and PTL. This study provides significant insights for expanding the high-value utilization of solid waste resources.

纯化对苯二甲酸（PTA）生产产生大量污泥，其特点是灰分中金属元素（如Ca、Co和Mn）含量高，属于危险有机废物。本研究对PTA污泥灰（PTASA）和凤凰叶（PTL）协同热解制合成气进行了全面研究。通过系统表征PTASA和PTL的理化性质，结合热降解行为分析和热解实验，确定高值气的最佳产气条件。结果表明，当PS850（850℃煅烧的PTASA）的掺量为30 %时，其总失重（TML）、综合热解指数（CPI）及合成气质量均达到最佳水平。此外，由于CO、CC和C-O基团的协同热解，与PTL单热解相比，PTASA的加入可使总挥发产物增加16.4 %。此外，原位共热解条件优于非原位共热解条件生产富氢气体。750℃煅烧的PTASA （PS750）具有稳定的微观结构和优良的金属矿物组成，催化效果最为显著，总有效气体（CO + H₂+ CH₄）产率为442.52 mL/g，比PS850和PTL共热解的产率提高了4. %。本研究为扩大固体废物资源的高价值利用提供了重要的见解。

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引用次数: 0

Recent progress on carbonaceous materials and their composites as adsorbents for phenolic pollutants: A review 碳质材料及其复合材料对酚类污染物吸附剂的研究进展

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-21 DOI: 10.1016/j.jaap.2026.107629

Muthanna J. Ahmed , Ioannis Anastopoulos , Fatma Marrakchi , Ioannis D. Manariotis

Phenolic compounds are recognized as priority pollutants of severe effect on the environment and public health owing to their low biodegradability, high toxicity, persistence, and bioaccumulation potential. Several studies have shown that adsorption based on carbonaceous materials and their composites is an efficient technique for the remediation of these pollutants. This review extensively addresses the recent advances in preparation, characterization, and application of the abovementioned adsorbents against a variety of phenolic pollutants. The carbonaceous materials, including activated carbon, biochar, and carbon nanotubes, as well as their composites with magnetics, clays, chitosan, zeolites, etc., exhibited favorable properties in terms of porosity and functionality. Activated carbon was the most frequently used adsorbent, with a higher performance against phenolic pollutants relative to biochar and carbon nanotubes. Moreover, carbonaceous material composites mostly showed higher adsorption performance than their raw forms. Phenol and its derivatives, such as p-nitrophenol, p-chlorophenol, 2,4-dichlorophenol, p-cresol or p-methylphenol, and resorcinol or 3-hydroxyphenol, were the most widely tested pollutants. The results of isotherm, kinetic, thermodynamic, mechanism, and regeneration studies were discussed. Pseudo-second order and Langmuir/Freundlich equations well represented most of the adsorption data. The dependence of adsorbent performance on pH, adsorbent dose, temperature, contact time, and inlet pollutant amount was also considered. Important findings, limitations, and future ideas are finally displayed.

酚类化合物具有低可生物降解性、高毒性、持久性和生物蓄积潜力，被认为是对环境和公众健康造成严重影响的优先污染物。一些研究表明，基于碳质材料及其复合材料的吸附是一种有效的污染物修复技术。本文综述了上述吸附剂在制备、表征和应用方面的最新进展，并对多种酚类污染物进行了综述。碳质材料包括活性炭、生物炭和碳纳米管，以及它们与磁性材料、粘土、壳聚糖、沸石等的复合材料，在孔隙度和功能方面表现出良好的性能。活性炭是最常用的吸附剂，相对于生物炭和碳纳米管，活性炭对酚类污染物具有更高的吸附性能。此外，碳质材料复合材料的吸附性能大多高于其原始形态。苯酚及其衍生物，如对硝基酚、对氯酚、2,4-二氯酚、对甲酚或对甲基酚、间苯二酚或3-羟基酚，是检测最广泛的污染物。讨论了等温线、动力学、热力学、机理和再生研究的结果。拟二阶方程和Langmuir/Freundlich方程很好地代表了大部分吸附数据。考虑了吸附剂的性能与pH、吸附剂剂量、温度、接触时间和进口污染物量的关系。重要的发现，局限性和未来的想法最终展示。

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引用次数: 0

In situ assessment of lignin pyrolysis reactions and their interactions with polysaccharides in Japanese cedar wood cell walls by TG-MS and Py-GC/MS 利用TG-MS和Py-GC/MS原位评价杉木细胞壁中木质素热解反应及其与多糖的相互作用

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-20 DOI: 10.1016/j.jaap.2026.107638

Daijiro Taira, Takashi Nomura, Eiji Minami, Haruo Kawamoto

Understanding the thermal degradation of lignin and polysaccharides in wood cell walls is essential for optimizing biomass pyrolysis. In this study, Japanese cedar (Cryptomeria japonica) was analyzed using thermogravimetric-mass spectrometry (TG-MS). Coupled with pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS), TG-MS enabled semi-quantitative analysis of key volatile products evolved during thermal degradation, each corresponding to distinct m/z values. Comparison between intact wood and isolated milled wood lignin (MWL) revealed the influence of cell wall supramolecular structures on lignin pyrolysis. The water (m/z 18) evolution profiles from both materials exhibited six distinct peaks, indicating stepwise lignin decomposition across six temperature ranges up to 1000 °C. β-Ether cleavage predominantly yielded coniferyl aldehyde rather than coniferyl alcohol at early stages, suggesting a polymer effect that promotes in situ C_γ oxidation—an observation rarely observed in model compound studies. The formation temperatures of pyrolysis products followed the order: β-ether bond cleavage < side-chain saturation < methoxy group demethylation. In intact wood, secondary reactions such as side-chain saturation and demethylation occurred at significantly lower temperatures than in MWL. Since the pyrolysis product profiles of MWL remained largely unaffected by the addition of sugars, the enhanced reactivity in wood is attributed to the influence of the cell wall ultrastructure. This study is the first to provide detailed in situ insights into the thermal degradation behavior of lignin and polysaccharides within wood cell walls, offering valuable contributions to the field of wood pyrolysis.

了解木质素和多糖在木材细胞壁中的热降解对优化生物质热解至关重要。本研究采用热重质谱法（TG-MS）对杉木（Cryptomeria japonica）进行了分析。结合热解-气相色谱-质谱（Py-GC/MS）， TG-MS可以对热降解过程中产生的关键挥发性产物进行半定量分析，每个挥发性产物对应不同的m/z值。通过对完整木材和分离木质素（MWL）的比较，揭示了细胞壁超分子结构对木质素热解的影响。两种材料的水（m/z 18）演化谱显示出6个不同的峰，表明木质素在高达1000℃的6个温度范围内逐步分解。β-醚裂解在早期阶段主要产生针叶醛而不是针叶醇，这表明聚合物效应促进了原位Cγ氧化——这在模型化合物研究中很少观察到。热解产物的形成温度顺序为：β-醚键裂解<； 侧链饱和<； 甲氧基去甲基化。在完整木材中，侧链饱和和去甲基化等二次反应在明显低于MWL的温度下发生。由于MWL的热解产物谱在很大程度上不受添加糖的影响，因此木材中的反应性增强归因于细胞壁超微结构的影响。该研究首次对木质素和多糖在木材细胞壁内的热降解行为提供了详细的原位洞察，为木材热解领域提供了有价值的贡献。

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引用次数: 0

Design of metal-TiO2/Al2O3 catalysts for selective C–O bond cleavage in lignin pyrolysis to phenolic bio-oil 木质素热解制酚醛生物油中C-O键选择性裂解金属- tio2 /Al2O3催化剂的设计

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-20 DOI: 10.1016/j.jaap.2026.107637

Ziye Lu, Yue Wang, Jiaqian Cui, Xijiao Bian, Junwei Tang, Silong Wu, Lei Wang

Lignin pyrolysis represents a promising route for producing phenolic chemicals. To address the challenges of low bio-oil yield and poor phenolic selectivity, this study developed a catalytic pyrolysis system utilizing TiO₂/Al₂O₃ (TA) catalysts modified with Cu, Co, Fe, and Ni, synthesized via a co-precipitation method. Based on the GC−MS peak area results, the 5 wt% Ni-TA catalyst achieved the highest bio-oil yield (37.8 wt%), while the 10 wt% Fe-TA catalyst demonstrated superior phenolic selectivity (24.78 %) through Fe^3 + -mediated hydrogen transfer. The 5-Ni-TA catalyst demonstrated excellent regeneration stability over five catalytic pyrolysis-regeneration cycles, with its catalytic performance and crystalline structure remaining largely unchanged. This work provides a viable catalyst design strategy for the targeted conversion of lignin into phenolic-rich bio-oils, contributing to the high-value utilization of lignocellulosic biomass.

木质素热解是一种很有前途的生产酚类化学品的途径。为了解决生物油收率低和苯酚选择性差的问题，本研究利用Cu、Co、Fe和Ni改性的TiO2/Al2O3 （TA）催化剂，通过共沉淀法合成了一种催化热解体系。根据GC - MS峰面积结果，5 wt% Ni-TA催化剂获得了最高的生物油收率（37.8 wt%），而10 wt% Fe-TA催化剂通过Fe3 +介导的氢转移表现出优异的酚选择性（24.78 %）。5-Ni-TA催化剂在5个催化热解-再生循环中表现出良好的再生稳定性，其催化性能和晶体结构基本保持不变。本研究为木质素定向转化为富酚生物油提供了一种可行的催化剂设计策略，有助于木质素纤维素生物质的高价值利用。

引用次数: 0

Valorization of pistachio shell biomass into potassium- and fluorine-doped porous carbon through pyrolysis for supercapacitor applications 通过热解将开心果壳生物质转化为钾和氟掺杂多孔碳用于超级电容器

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-20 DOI: 10.1016/j.jaap.2026.107634

Yavuz Yardım , Cafer Saka

In this study, pistachio shell biomass was valorized into a high-performance porous carbon material through controlled pyrolysis followed by KOH chemical activation and subsequent potassium/fluorine (K/F) modification. The influence of dual K/F doping on the structural evolution, surface chemistry, and electrochemical behavior of pistachio shell-derived activated carbon (PSAC) was systematically investigated. XRD and Raman analyses revealed partial graphitization accompanied by increased defect density after K/F incorporation, as evidenced by the appearance of a broadened (002) diffraction peak at ∼26° in the XRD pattern and an increased Raman ID/IG ratio compared to pristine PSAC, while FTIR and XPS confirmed significant modification of surface functional groups and successful introduction of K, F, and oxygen-containing species. Textural characterization demonstrated that K/F doping induced pore widening and the development of a hierarchical pore structure, with a decrease in BET surface area from 483 to 383 m² g⁻¹ accompanied by a substantial increase in average pore radius from 1.65 to 3.94 nm. Electron microscopy analyses showed that K/F modification resulted in rougher, more heterogeneous surfaces and a more uniform layered morphology at the nanoscale. Electrochemical evaluation in aqueous electrolytes revealed that K/F-doped PSAC exhibited significantly enhanced charge-transfer kinetics, lower interfacial resistance, and improved ion diffusion compared to pristine PSAC. The modified electrode delivered a high specific capacitance of 188 F g⁻¹ at 0.5 A g⁻¹ and maintained excellent rate capability and cycling stability, retaining 88.2 % of its initial capacitance after 10 000 charge–discharge cycles. Kinetic analysis indicated that K/F doping strengthened diffusion-controlled charge storage without shifting the mechanism toward purely capacitive behavior. The results demonstrate that dual K/F modification effectively tailors the pyrolysis-derived carbon framework and surface chemistry, offering valuable insights into the design of biomass-derived carbons for advanced electrochemical energy storage applications.

本研究以开心果壳生物质为原料，通过控制热解、KOH化学活化和K/F改性制备高性能多孔碳材料。系统研究了双K/F掺杂对开心果壳源活性炭（PSAC）结构演变、表面化学和电化学行为的影响。XRD和拉曼分析显示，加入K/F后，部分石墨化伴随着缺陷密度的增加，这可以从XRD图中在~ 26°处出现的（002）衍射峰和与原始PSAC相比拉曼ID/IG比的增加中得到证明，而FTIR和XPS证实了表面官能团的显著修饰以及K， F和含氧物质的成功引入。结构表征表明，K/F掺杂导致了孔隙的扩大和分层孔结构的发展，其比表面积从483减少到383 m²g⁻¹ ，同时平均孔半径从1.65增加到3.94 nm。电镜分析表明，K/F改性导致纳米尺度上更粗糙、更不均匀的表面和更均匀的层状形貌。水溶液中的电化学评价表明，与未掺杂的PSAC相比，K/ f掺杂的PSAC具有显著增强的电荷转移动力学，更低的界面电阻和更好的离子扩散。修饰后的电极具有188 F g⁻¹ （0.5 a g⁻¹ ）的高比电容，并在10000次充放电循环后保持了良好的倍率能力和循环稳定性，保持了88.2% 的初始电容。动力学分析表明，K/F掺杂增强了扩散控制的电荷存储，而没有将机制转变为纯电容行为。结果表明，双K/F改性有效地调整了热解衍生碳的框架和表面化学性质，为设计用于先进电化学储能应用的生物质衍生碳提供了有价值的见解。

{"title":"Valorization of pistachio shell biomass into potassium- and fluorine-doped porous carbon through pyrolysis for supercapacitor applications","authors":"Yavuz Yardım , Cafer Saka","doi":"10.1016/j.jaap.2026.107634","DOIUrl":"10.1016/j.jaap.2026.107634","url":null,"abstract":"<div><div>In this study, pistachio shell biomass was valorized into a high-performance porous carbon material through controlled pyrolysis followed by KOH chemical activation and subsequent potassium/fluorine (K/F) modification. The influence of dual K/F doping on the structural evolution, surface chemistry, and electrochemical behavior of pistachio shell-derived activated carbon (PSAC) was systematically investigated. XRD and Raman analyses revealed partial graphitization accompanied by increased defect density after K/F incorporation, as evidenced by the appearance of a broadened (002) diffraction peak at ∼26° in the XRD pattern and an increased Raman <em>I</em>D/<em>IG</em> ratio compared to pristine PSAC, while FTIR and XPS confirmed significant modification of surface functional groups and successful introduction of K, F, and oxygen-containing species. Textural characterization demonstrated that K/F doping induced pore widening and the development of a hierarchical pore structure, with a decrease in BET surface area from 483 to 383 m² g⁻¹ accompanied by a substantial increase in average pore radius from 1.65 to 3.94 nm. Electron microscopy analyses showed that K/F modification resulted in rougher, more heterogeneous surfaces and a more uniform layered morphology at the nanoscale. Electrochemical evaluation in aqueous electrolytes revealed that K/F-doped PSAC exhibited significantly enhanced charge-transfer kinetics, lower interfacial resistance, and improved ion diffusion compared to pristine PSAC. The modified electrode delivered a high specific capacitance of 188 F g⁻¹ at 0.5 A g⁻¹ and maintained excellent rate capability and cycling stability, retaining 88.2 % of its initial capacitance after 10 000 charge–discharge cycles. Kinetic analysis indicated that K/F doping strengthened diffusion-controlled charge storage without shifting the mechanism toward purely capacitive behavior. The results demonstrate that dual K/F modification effectively tailors the pyrolysis-derived carbon framework and surface chemistry, offering valuable insights into the design of biomass-derived carbons for advanced electrochemical energy storage applications.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107634"},"PeriodicalIF":6.2,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Upgraded medical waste recycling via magnetic catalyst combined with biomass pyrolysis: Thermal decomposition, product evolution, and sequential temperature-dependent responses 磁性催化剂结合生物质热解的医疗废物升级回收：热分解、产物演化和顺序温度依赖响应

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-20 DOI: 10.1016/j.jaap.2026.107636

Weizhuo Guan , Shunan Ren , Ran Chen , Zejun Luo , Yuqing Sun , Xiefei Zhu

To achieve high-value utilization of medical waste and the net-zero target, introducing green and renewable biomass to upgrade medical waste via pyrolysis is considered a highly promising solution. This study achieves pyrolytic upgrading of medical waste syringes by incorporating walnut shells and rice husks, while the addition of the magnetic catalyst Fe₃O₄-NiO further promoted its efficient conversion. The addition of biomass enhanced the yield of volatile products and aromatic hydrocarbon. At the same time, the formation of pyrolytic char and CO₂ was suppressed. The char yield was reduced from the theoretical value of 23 % to the actual value of 15 %. Moreover, the peak temperature corresponding to the pyrolysis of discarded syringes decreased from 484 °C to 447 °C. The addition of the catalyst not only further effectively reduced the CO₂ concentration but also promoted the formation of light, high-value components. This study confirms the technical feasibility of using biomass to co-process plastic medical waste, offering a novel technical approach to tackling complex medical solid waste pollution issues.

为了实现医疗废物的高价值利用和净零目标，引入绿色可再生生物质通过热解对医疗废物进行升级被认为是一个非常有前途的解决方案。本研究通过加入核桃壳和稻壳实现了医疗废物注射器的热解升级，同时添加磁性催化剂Fe3O4-NiO进一步促进了其高效转化。生物质的加入提高了挥发性产物和芳烃的产量。同时抑制了热解炭和CO2的生成。焦炭产率由理论值23% %降至实际值15% %。废弃注射器热解对应的峰值温度由484℃降至447℃。催化剂的加入不仅进一步有效降低了CO2浓度，而且促进了轻质高值组分的形成。本研究证实了利用生物质协同处理塑料医疗废物的技术可行性，为解决复杂的医疗固体废物污染问题提供了一种新的技术途径。

{"title":"Upgraded medical waste recycling via magnetic catalyst combined with biomass pyrolysis: Thermal decomposition, product evolution, and sequential temperature-dependent responses","authors":"Weizhuo Guan , Shunan Ren , Ran Chen , Zejun Luo , Yuqing Sun , Xiefei Zhu","doi":"10.1016/j.jaap.2026.107636","DOIUrl":"10.1016/j.jaap.2026.107636","url":null,"abstract":"<div><div>To achieve high-value utilization of medical waste and the net-zero target, introducing green and renewable biomass to upgrade medical waste via pyrolysis is considered a highly promising solution. This study achieves pyrolytic upgrading of medical waste syringes by incorporating walnut shells and rice husks, while the addition of the magnetic catalyst Fe<sub>3</sub>O<sub>4</sub>-NiO further promoted its efficient conversion. The addition of biomass enhanced the yield of volatile products and aromatic hydrocarbon. At the same time, the formation of pyrolytic char and CO<sub>2</sub> was suppressed. The char yield was reduced from the theoretical value of 23 % to the actual value of 15 %. Moreover, the peak temperature corresponding to the pyrolysis of discarded syringes decreased from 484 °C to 447 °C. The addition of the catalyst not only further effectively reduced the CO<sub>2</sub> concentration but also promoted the formation of light, high-value components. This study confirms the technical feasibility of using biomass to co-process plastic medical waste, offering a novel technical approach to tackling complex medical solid waste pollution issues.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107636"},"PeriodicalIF":6.2,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bamboo-derived N-doped biochar for high-efficiency CO2 adsorption 竹基n掺杂生物炭的高效CO2吸附

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-19 DOI: 10.1016/j.jaap.2026.107633

Dan Dang , Yichao Wu , Juncheng Zhang , Xinyi Jiang , Guoqing Meng , Zhuo Wu , Baoxin Zha , Xingyi Wang , Wenju Liu , Lu He

N-doped porous carbon has been extensively utilized for the capture and separation of CO₂ in flue gas environments. However, its large-scale industrial implementation is hindered by the complexity of its preparation process and the associated high costs. This study presents a simple method for directly synthesizing N-doped porous carbon under at 650 ℃. This method utilizes various parts of bamboo as carbon precursors, NaNH₂ as an activator and nitrogen source. The synthesis of N-doped porous carbon with a well-developed microporous structure was successfully achieved. The material’s properties were characterized using a variety of characterization techniques, including XRD, XPS, SEM, and BET analysis. The porous carbon that was obtained had a BET specific surface area of 762–2401 m²/g and a pore volume of 0.482–1.352 cm³/g. The optimal sample (BS-1) demonstrated a substantial CO₂ adsorption capacity of 5.02 mmol/g at 0 ℃ and 1 bar. A systematic study of the prepared porous carbon demonstrated that the specific surface area, microporous volume, microporosity, and nitrogen content of the porous carbon collectively affected the CO₂ adsorption performance. Moreover, these bamboo-derived N-doped porous carbons exhibit suitable CO₂/N₂ selectivity and isosteric heat of adsorption (Q_st). Furthermore, density functional theory (DFT) calculations further elucidated the interaction mechanism between nitrogen-containing structures and CO₂ molecules. The results indicate that pyrrolic-N exhibits the strongest adsorption energy toward CO₂, attributed to the Lewis acid-base interaction between the nitrogen-containing structure and CO₂. The simple synthesis process and low temperature of these inexpensive bamboo-based porous carbons suggest that they are a potential CO₂ adsorbent.

氮掺杂多孔碳已被广泛用于烟气环境中CO2的捕获和分离。然而，其制备过程的复杂性和相关的高成本阻碍了其大规模工业实施。本文提出了一种在650℃下直接合成n掺杂多孔碳的简单方法。该方法利用竹子的不同部位作为碳前驱体，NaNH2作为活化剂和氮源。成功合成了微孔结构发达的n掺杂多孔碳。采用XRD、XPS、SEM和BET等多种表征技术对材料的性能进行了表征。所得多孔碳的BET比表面积为762-2401 m2/g，孔体积为0.482-1.352 cm3/g。最佳样品（BS-1）在0℃、1 bar条件下的CO2吸附量为5.02 mmol/g。对制备的多孔碳进行系统的研究表明，多孔碳的比表面积、微孔体积、微孔隙度和含氮量共同影响着CO2的吸附性能。此外，这些竹材衍生的n掺杂多孔碳具有良好的CO2/N2选择性和等容吸附热（Qst）。此外，密度泛函理论（DFT）计算进一步阐明了含氮结构与CO2分子的相互作用机理。结果表明，吡咯烷- n对CO2的吸附能最强，这是由于含氮结构与CO2之间的Lewis酸碱相互作用所致。竹基多孔碳的合成工艺简单，温度低，是一种很有潜力的CO2吸附剂。

{"title":"Bamboo-derived N-doped biochar for high-efficiency CO2 adsorption","authors":"Dan Dang , Yichao Wu , Juncheng Zhang , Xinyi Jiang , Guoqing Meng , Zhuo Wu , Baoxin Zha , Xingyi Wang , Wenju Liu , Lu He","doi":"10.1016/j.jaap.2026.107633","DOIUrl":"10.1016/j.jaap.2026.107633","url":null,"abstract":"<div><div>N-doped porous carbon has been extensively utilized for the capture and separation of CO<sub>2</sub> in flue gas environments. However, its large-scale industrial implementation is hindered by the complexity of its preparation process and the associated high costs. This study presents a simple method for directly synthesizing N-doped porous carbon under at 650 ℃. This method utilizes various parts of bamboo as carbon precursors, NaNH<sub>2</sub> as an activator and nitrogen source. The synthesis of N-doped porous carbon with a well-developed microporous structure was successfully achieved. The material’s properties were characterized using a variety of characterization techniques, including XRD, XPS, SEM, and BET analysis. The porous carbon that was obtained had a BET specific surface area of 762–2401 m<sup>2</sup>/g and a pore volume of 0.482–1.352 cm<sup>3</sup>/g. The optimal sample (BS-1) demonstrated a substantial CO<sub>2</sub> adsorption capacity of 5.02 mmol/g at 0 ℃ and 1 bar. A systematic study of the prepared porous carbon demonstrated that the specific surface area, microporous volume, microporosity, and nitrogen content of the porous carbon collectively affected the CO<sub>2</sub> adsorption performance. Moreover, these bamboo-derived N-doped porous carbons exhibit suitable CO<sub>2</sub>/N<sub>2</sub> selectivity and isosteric heat of adsorption (Q<sub>st</sub>). Furthermore, density functional theory (DFT) calculations further elucidated the interaction mechanism between nitrogen-containing structures and CO<sub>2</sub> molecules. The results indicate that pyrrolic-N exhibits the strongest adsorption energy toward CO<sub>2</sub>, attributed to the Lewis acid-base interaction between the nitrogen-containing structure and CO<sub>2</sub>. The simple synthesis process and low temperature of these inexpensive bamboo-based porous carbons suggest that they are a potential CO<sub>2</sub> adsorbent.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107633"},"PeriodicalIF":6.2,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of thermal-oxidative aging on flame-retardant mining conveyor belt: Pyrolysis characteristic and combustion behavior 热氧化老化对阻燃矿用输送带的影响：热解特性与燃烧行为

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-19 DOI: 10.1016/j.jaap.2026.107630

Guoxiang Wen , Xiao Wang , Zhiyuan Shen , Jia Li , Bobo Shi , Yu Zhang , Junyi Li , Xuan Xu , Fubao Zhou

Thermal-oxidative aging (TOA) has a significant impact on the safety and fire performance of flame-retardant conveyor belts used in mining. In this study, a multi-scale characterization approach was employed, integrating reactive force field molecular dynamics simulations, thermogravimetry-Fourier transform infrared spectroscopy/mass spectrometry, and cone calorimetry coupled with Fourier transform infrared gas analysis, to systematically investigate the influence of TOA on combustion behavior and gas emission characteristics. The results indicate that the cleavage of C-Cl bonds during TOA produces HCl, causing rapid mass loss, while the early degradation and volatilization of plasticizers and other additives further accelerate weight reduction. TG-FTIR/MS analysis shows that the removal of unstable chlorine-containing species enhances the thermal stability of the material. TOA elevates the initial pyrolysis temperature, reduces the mass loss in stage R_Ⅰ, and in stage R_Ⅱ suppresses the formation of aromatic compounds while promoting the generation of aliphatic compounds. CONE-FTIR results reveal that, due to the weakening of the gas-phase flame-retardant effect, TOA enhances combustion completeness, leading to increased heat release rate and CO₂ yield while reducing CO yield; meanwhile, the elimination of chlorine species and the migration of flame retardants and other additives contribute to the prolonged time to ignition. This study grounded in realistic underground mine conditions, systematically elucidates how TOA-induced chlorine-related chemical evolution and plasticizer migration regulate the pyrolysis, combustion, and gas emission behaviors of conveyor belts, providing critical insights into the TOA behavior of flame-retardant composites and supporting fire safety assessments for engineering applications.

热氧化老化（TOA）对矿用阻燃输送带的安全性和防火性能有重要影响。本研究采用多尺度表征方法，结合反应力场分子动力学模拟、热重-傅里叶变换红外光谱/质谱、锥量热法结合傅里叶变换红外气体分析，系统研究了TOA对燃烧行为和气体排放特性的影响。结果表明，在TOA过程中C-Cl键的断裂产生HCl，导致质量的快速损失，而增塑剂和其他添加剂的早期降解和挥发进一步加速了重量的减轻。TG-FTIR/MS分析表明，不稳定含氯物质的去除提高了材料的热稳定性。TOA提高了初始热解温度，降低了RⅠ阶段的质量损失，RⅡ阶段抑制了芳香族化合物的生成，促进了脂肪族化合物的生成。CONE-FTIR结果表明，由于气相阻燃效果的减弱，TOA增强了燃烧的完全性，增加了放热速率和CO2产率，同时降低了CO产率；同时，氯种的消除和阻燃剂及其他添加剂的迁移也使着火时间延长。本研究立足于现实的地下矿山条件，系统地阐明了TOA诱导的氯相关化学演化和增塑剂迁移如何调节传送带的热解、燃烧和气体排放行为，为阻燃复合材料的TOA行为提供了重要的见解，并为工程应用的消防安全评估提供了支持。

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引用次数: 0

Enhancing bio-oil yield and quality from palm kernel shells via co-pyrolysis with palm fresh fruit in a double auger reactor 双螺旋反应器中棕榈仁壳与棕榈鲜果共热解提高生物油收率和品质

IF 6.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2026-01-19 DOI: 10.1016/j.jaap.2026.107632

Nathawat Unsomsri , Natthapol Unsomsri , Sommas Kaewluan , Sittinun Tawkaew , Songkran Wiriyasart

This study explores the co-pyrolysis of palm kernel shell (PKS) and palm fresh fruit (PFF) residues using a double-auger reactor operated at 550 °C to evaluate the impact of feedstock blending on bio-oil yield, composition, physicochemical properties, and carbon distribution. Three blend ratios, PKS:PFF at 100:0, 75:25, and 50:50, were tested to optimize product distribution. Bio-oil yield markedly increased from 5.7 % (pure PKS) to 17.4 % at a 50:50 blend, driven by PFF’s high volatile and lipid content. Distillation showed the diesel-range fraction rising from 12 % to 33 %, while the higher heating value improved slightly from 38.83 MJ kg⁻¹ to 41.00 MJ kg⁻¹. GC-MS analysis revealed hydrocarbon- and phenolic-rich bio-oils, with phenol dominant. Mechanistically, PFFs’ in-situ hydrogen donation fostered deoxygenation and demethoxylation reactions, enhancing fuel quality. Increasing PFF content boosted diesel-range alkanes and alkenes, reduced oxygenated compounds, and improved energy density. Physicochemical properties also notably improved, including reductions in specific gravity, kinematic viscosity, and total acid number. Elemental analysis confirmed higher carbon and hydrogen, and a notable oxygen reduction (13.47 % to 11.36 %) in the bio-oil. These results indicate PKS-PFF co-pyrolysis is a promising approach for upgrading palm biomass waste into liquid fuels with improved yield and composition, valorizing industrial residues. Future work should include engine testing of distilled fractions for performance, emissions, and long-term fuel stability.

本研究利用双螺旋反应器在550°C下对棕榈仁壳（PKS）和棕榈鲜果（PFF）残留物进行共热解，以评估原料混合对生物油产量、组成、理化性质和碳分布的影响。测试了三种混合比例，PKS:PFF为100:0,75:25和50:50，以优化产品分布。由于PFF的高挥发性和高脂质含量，生物油收率从5.7% %（纯PKS）显著提高到17.4% %（50:50混合）。蒸馏结果表明，柴油馏分从12 %上升到33 %，高热值从38.83 MJ kg−1上升到41.00 MJ kg−1。气相色谱-质谱分析显示，生物油中烃类和酚类成分丰富，以酚类为主。从机理上讲，pff的原位供氢促进了脱氧和去甲氧基化反应，提高了燃料质量。增加PFF含量提高了柴油范围内的烷烃和烯烃，减少了含氧化合物，提高了能量密度。物理化学性质也得到了显著改善，包括比重、运动粘度和总酸值的降低。元素分析证实了生物油中较高的碳和氢，以及显著的氧还原（13.47 %至11.36 %）。这些结果表明，PKS-PFF共热解是一种很有前途的方法，可以将棕榈生物质废物转化为液体燃料，提高产量和成分，实现工业残留物的增值。未来的工作应包括发动机测试蒸馏馏分的性能、排放和长期燃料稳定性。

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引用次数: 0

Application of subcritical Cr(VI)-containing wastewater to treat PVC waste: Cr(VI) removal, PVC dechlorination and plasticizer recovery 亚临界含Cr（VI）废水处理PVC废弃物的应用：Cr（VI）去除、PVC脱氯和增塑剂回收

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.2026.107631

Yingying Qi, Yan Liu, Yan Zhang, Fu-Rong Xiu

The treatment of polyvinyl chloride (PVC) waste has received wide concern due to the high chlorine content of and the presence of toxic plasticizer such as diethylhexyl phthalate (DEHP). The chromium-containing wastewater is also an important environmental issue due to the toxic heavy metal Cr(VI). In this study, a synergistic treatment strategy for PVC waste and Cr(VI)-containing wastewater was developed by using subcritical water (SubCW) process. The strong reducing properties of polyol and polyene structures in situ formed from PVC dechlorination and subcritical water molecules synergistically promoted the significant detoxification/reduction of Cr(VI), and the Cr(VI) in turn had an enhancement effect on the dechlorination and conversion of PVC waste. The PVC dechlorination was significantly influenced by SubCW temperature, treatment time, solid-liquid ratio, and Cr(VI) concentration. Optimal conditions of 250 ℃, 60 min, a solid-liquid ratio of 1:15 g/mL, and a Cr(Ⅵ) concentration of 200 mg/L resulted in a PVC dechlorination efficiency of 95.42 % and a Cr(Ⅵ) removal ratio of 99.55 %. Cr(Ⅵ) exhibited an enhancement effect on PVC dechlorination between 200 ℃ and 300 ℃. In the SubCW system including Cr(Ⅵ), PVC dechlorination pathway involved direct HCl removal and hydroxyl substitution reactions. Hydrolysis of plasticizer DEHP at 250 ℃ resulted in the formation of phthalic acid crystals with a yield of 60.45 %. The oil product mainly included benzoic acid with a GC-MS relative peak area abundance of 94.41 % due to the decomposition and conversion of DEHP. The proposed subcritical chromium-containing wastewater (SCCW) process could be a promising technology for the synergistic treatment of the DEHP-rich PVC waste and chromium-containing wastewater.

聚氯乙烯（PVC）废物的处理由于其高氯含量和有毒增塑剂如邻苯二甲酸二乙己酯（DEHP）的存在而受到广泛关注。含铬废水也是一个重要的环境问题，因为它含有有毒的重金属Cr（VI）。研究了亚临界水（SubCW）工艺对PVC废水和含铬废水的协同处理策略。由PVC脱氯和亚临界水分子形成的原位多元醇和多烯结构的强还原性协同促进了Cr（VI）的显著解毒/还原，而Cr（VI）反过来又对PVC废物的脱氯和转化有增强作用。亚连续波温度、处理时间、料液比和Cr（VI）浓度对PVC脱氯效果有显著影响。最佳条件为250℃、60 min、料液比为1:15 g/mL、Cr（Ⅵ）浓度为200 mg/L， PVC脱氯效率为95.42 %,Cr（Ⅵ）去除率为99.55 %。在200 ~ 300℃范围内，Cr（Ⅵ）对PVC脱氯有增强作用。在含Cr（Ⅵ）的SubCW体系中，PVC脱氯途径包括直接脱除HCl和羟基取代反应。增塑剂DEHP在250℃下水解生成邻苯二甲酸晶体，产率为60.45 %。产物主要成分为苯甲酸，经DEHP分解转化，GC-MS相对峰面积丰度为94.41 %。提出的亚临界含铬废水（SCCW）工艺是一种很有前途的协同处理富dehp PVC废水和含铬废水的技术。

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