Journal of Analytical and Applied Pyrolysis最新文献

{"title":"Bamboo-derived N-doped biochar for high-efficiency CO2 adsorption","authors":"Dan Dang ,&nbsp;Yichao Wu ,&nbsp;Juncheng Zhang ,&nbsp;Xinyi Jiang ,&nbsp;Guoqing Meng ,&nbsp;Zhuo Wu ,&nbsp;Baoxin Zha ,&nbsp;Xingyi Wang ,&nbsp;Wenju Liu ,&nbsp;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 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.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107633"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","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}

{"title":"Integrated CaO–zeolite dual catalyst for selective pyrolysis of antibiotic-laden sludge: Coupling pollutant detoxification with resource recovery","authors":"Dajie Jia ,&nbsp;Jingyong Liu ,&nbsp;Zhibin Chen ,&nbsp;Leyao Tao ,&nbsp;Liangzhong Li ,&nbsp;Fatih Evrendilek ,&nbsp;Yao He ,&nbsp;Tao Chen ,&nbsp;Xin Chen ,&nbsp;Wuming Xie","doi":"10.1016/j.jaap.2026.107627","DOIUrl":"10.1016/j.jaap.2026.107627","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107627"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024336","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}

{"title":"In situ generated Co0 and Co-N sites for efficient catalytic hydrodeoxygenation of vanillin to 4-methylguaiacol","authors":"Mingqin Xue ,&nbsp;Yuhao Shi ,&nbsp;Fei Ge ,&nbsp;Yu Gu ,&nbsp;Jianchun Jiang ,&nbsp;Minghao Zhou","doi":"10.1016/j.jaap.2026.107618","DOIUrl":"10.1016/j.jaap.2026.107618","url":null,"abstract":"<div><div>The hydrodeoxygenation of lignin-derived oxygen-containing compounds represents a pivotal step toward the sustainable production of high-value chemicals and biofuels. Herein, a series of spherical nitrogen-doped carbon-supported cobalt-based catalysts (Co-ATA-n-T) were fabricated via sequential solvothermal synthesis and carbothermal reduction under a nitrogen atmosphere, and applied to the hydrogenation of vanillin for the selective production of 2-methoxy-4-methylphenol (MMP). Under optimized reaction conditions (180 ℃, 1 MPa N₂, 4 h) with isopropanol as hydrogen donor, the Co-ATA-1–800 catalyst exhibited exceptional catalytic activity: vanillin conversion reached 100 %, with a 92 % yield of 2-methoxy-4-methylphenol (MMP). Specifically, Nitrogen doping regulated the surface structure of the carbon matrix, where the doped N atoms formed strong coordination with the encapsulating Co species, thereby promoting the generation of Co⁰ and Co-N active sites. These active species facilitated the hydrogenolysis of the aldehyde group (-CHO) in vanillin and enhanced the weakening and cleavage of the C-O bond in the reaction intermediate. These results provide valuable guidance for the rational design of high-performance non-precious metal catalysts in the conversion of lignin derivatives.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107618"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145975810","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}

{"title":"Research on carbon structure evolution, surface chemical properties, microstructure, and mechanism of low-rank coal pyrolysis under different atmospheres","authors":"Xiaowei Gan ,&nbsp;Zhengjie Chen ,&nbsp;Wenhui Ma ,&nbsp;Yakun Zhang ,&nbsp;Junyu Qu","doi":"10.1016/j.jaap.2026.107607","DOIUrl":"10.1016/j.jaap.2026.107607","url":null,"abstract":"<div><div>This study investigated the effects of different calcination temperatures (300–900 °C) and atmospheres (air and argon) on the pyrolysis of low-rank non-coking coal from Xinjiang, China. Changes in the carbon structure, surface chemical properties, microstructure, and reaction mechanism of the coal were analyzed. Elemental analysis, XRD, Raman spectroscopy, BET, SEM, XPS, TG-FTIR, and PY-GC-MS were used to investigate the mechanism by which the atmosphere regulated the pyrolysis of low-rank unbound coal. The results were used to correlate the relationship between the atmosphere, structure, and products. Under an argon atmosphere, the carbon content of coke (90.18 % at 900 °C) and calorific value (HHV = 31.53 MJ/kg) were higher, which promoted the graphitization of carbon materials. The degree of graphitization (<em>g</em>) and microcrystalline size (<em>Lc</em> and <em>La</em>) increased significantly upon increasing the temperature. However, under an air atmosphere, carbon loss was caused by oxidation, but the specific surface area (433.32 m²/g) was higher, and the formation of long-range ordered structures was inhibited. The air atmosphere induced dynamic changes in oxygen-containing functional groups, and the products were mainly CO₂ and H₂O. Under an argon atmosphere, more hydrocarbons were released, and the largest total release of pyrolysis products occurred at 450 °C. Finally, Pearson correlation analysis was performed, and the results were used to propose the calcination decomposition mechanism. This study provides a theoretical basis for the application of low-rank coal in the industrial silicon sector, and has significant practical value.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107607"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145975807","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}

{"title":"Design of metal-TiO2/Al2O3 catalysts for selective C–O bond cleavage in lignin pyrolysis to phenolic bio-oil","authors":"Ziye Lu,&nbsp;Yue Wang,&nbsp;Jiaqian Cui,&nbsp;Xijiao Bian,&nbsp;Junwei Tang,&nbsp;Silong Wu,&nbsp;Lei Wang","doi":"10.1016/j.jaap.2026.107637","DOIUrl":"10.1016/j.jaap.2026.107637","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107637"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024624","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}

{"title":"Gallium and self-nitrogen co-doped algal biochar catalysts for selective production of monoaromatic hydrocarbons from microalgae pyrolysis","authors":"Ruihan Dong,&nbsp;Yang Yang,&nbsp;Haiping Yang,&nbsp;Ziyue Tang,&nbsp;Xianhua Wang,&nbsp;Yingquan Chen,&nbsp;Hanping Chen","doi":"10.1016/j.jaap.2026.107622","DOIUrl":"10.1016/j.jaap.2026.107622","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107622"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024338","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}

{"title":"Movable oil content and control mechanisms of laminae assemblages in lacustrine shale system: Insights from multiple pyrolysis experiments of Chang 73 organic-rich shales in the Ordos Basin","authors":"Fuwei Wang ,&nbsp;Dongxia Chen ,&nbsp;Xingjian Wang ,&nbsp;Mengya Jiang ,&nbsp;Renzeng Wanma ,&nbsp;Qiaochu Wang ,&nbsp;Yuchao Wang ,&nbsp;Lanxi Rong ,&nbsp;Yuqi Wang ,&nbsp;Zijie Yang ,&nbsp;Chen Liu ,&nbsp;Khawaja Hasnain Iltaf ,&nbsp;Zhangxin Chen","doi":"10.1016/j.jaap.2026.107645","DOIUrl":"10.1016/j.jaap.2026.107645","url":null,"abstract":"<div><div>Evaluating the movable oil content and control mechanisms in shales is critical for clarifying oil enrichment, sweet spot assessments, and recovery enhancements in shale oil plays. However, research on lacustrine shale systems remains limited due to the development of heterogeneous laminae assemblages. In this study, the laminae assemblage types and their geological features were systematically characterized through direct observation (core and microscope), mineral quantification and elemental analysis, and organic geochemical testing. By combining multitemperature pyrolysis and Rock-Eval analysis before and after solvent extraction, core samples from the Triassic Chang 7₃ submember organic-rich shales in the Ordos Basin were employed to conduct movable oil evaluation and control mechanism analysis, especially the coupling control of in situ geological factors and oil migration factor. The results show that the Chang 7₃ organic-rich shale can be categorized into massive shale (MS), tuffaceous laminated shale (TLS) and felsic laminated shale (FLS) according to the laminae assemblages. The typical feature of organic-rich TLS samples is a high movable oil content but a low movable oil proportion. Instead, despite having a slightly lower movable oil content, organic-lean FLS samples exhibit the typical characteristics of a high movable oil proportion and better mobility. The movable oil characteristics of different laminae assemblages are controlled by both in situ geological factors and oil migration. Specifically, the organic geochemical features were positively correlated with the movable oil content but negatively correlated with the movable oil proportion. The pore structure controls the movable oil content more strongly than the movable oil proportion, whereas the inorganic composition, especially clay minerals, has a greater impact on movable oil proportion. Moreover, shale oil migration tends to reduce the movable oil content in the oil-expelling unit and significantly increases the movable oil content in the oil-receiving unit, thus contributing to movable oil enrichment in the organic-lean laminae assemblages. Consequently, this study establishes the movable oil enrichment patterns of different laminae assemblages under the coupled control of in situ geological factors and oil migration factors, which can provide guidance for sweet spot evaluation and achieve cost-effective shale oil development.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107645"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074407","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}

{"title":"Interfacial engineering of CeO2-carbon nanotube composites via chemical vapor deposition for enhanced catalytic aquathermolysis of heavy oil","authors":"Jiaxi Lu,&nbsp;Hong Wang,&nbsp;Xiaodong Tang,&nbsp;Jingjing Li,&nbsp;Wenke Fan,&nbsp;Dayong Qing","doi":"10.1016/j.jaap.2026.107614","DOIUrl":"10.1016/j.jaap.2026.107614","url":null,"abstract":"<div><div>The catalytic upgrading of heavy oil via hydrothermal cracking is often constrained by the lack of efficient and robust catalysts capable of breaking down complex macromolecular structures. In this work, CeO₂ nanoparticles were synthesized by a hydrothermal method, and a CeO₂-carbon nanotube composite catalyst (CeO₂-C) was obtained by directly growing carbon nanotubes (CNTs) on CeO₂ using chemical vapor deposition (CVD) for the first time. The optimal conditions for CNT growth were systematically explored and the epitaxial growth mechanism of CNTs on CeO₂ was revealed. The structure, morphology, and catalytic properties of these CeO₂-based catalysts were comprehensively characterized. The CeO₂-C catalyst exhibited outstanding activity in the hydrothermal cracking of heavy oil, achieving a viscosity reduction of 72.0 % at 240 °C for 24 h, which was further enhanced to 86.3 % in the presence of the hydrogen donor tetralin. Detailed compositional analyses revealed a significant shift toward lighter oil fractions and effective removal of nitrogen and sulfur heteroatoms. Catalyst characterization indicated that CNT incorporation improved CeO₂ dispersion and stability, and importantly, promoted dynamic regeneration of surface Ce^3 + and oxygen vacancies during reaction, providing abundant active sites for hydrogenation, ring opening, desulfurization, and denitrogenation. This study demonstrates that interfacial engineering of CeO₂-CNT composites offers a promising strategy for developing high-performance catalysts for heavy oil upgrading.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107614"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024351","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}

{"title":"Data-driven discovery of tobacco leaf blending rules for new replacement through integration of thermogravimetric, near-infrared, and attribute-encoded fingerprinting data","authors":"Ji Yang ,&nbsp;Qian Gao ,&nbsp;Qianxu Yang ,&nbsp;Hui Jiang ,&nbsp;Wei Zhang ,&nbsp;Shiyun Tang ,&nbsp;Ze Liu ,&nbsp;Aiming Chen ,&nbsp;Zhongda Zeng","doi":"10.1016/j.jaap.2026.107611","DOIUrl":"10.1016/j.jaap.2026.107611","url":null,"abstract":"<div><div>The replacement of tobacco raw materials and the maintenance of blending formulations constitute a critical process in the continuous optimization of cigarette products and the development of new products. Addressing the limitations of traditional replacement strategies to heavily rely on empirical experience and lack quantifiable rules, a multimodal, data-driven approach was proposed to integrate thermogravimetric analysis (TGA) data, near-infrared (NIR) spectral information, and encoded fingerprinting features. The approach systematically uncovers structural patterns in tobacco leaf replacement and constructs an intelligent recommendation model. Initially, a large-scale replacement database comprising 5775 historical replacement records was established, from which 390 typical replacement samples with both TGA and NIR data were extracted. On this basis, multi-level attribute variation scenarios were designed, and feature selection and similarity calculations were respectively conducted on TGA, NIR, and their fused data. The methodology incorporates strong or weak correlation point extraction, forced inclusion of key features, and a fusion strategy of TGA and NIR data using orthogonal projection, which significantly enhance inter-dimensional information complementarity and feature representation. Simultaneously, an attribute encoding matrix was constructed to systematically encode the year, origin, cultivar, part, and grade of tobacco leaves. Coupled with historical variation frequencies, an attribute variation scoring model was developed to assist in evaluating the rationality of replacement schemes. Model evaluation was conducted using 33 sets of actual validation samples. The results demonstrate that the proposed method substantially outperforms single-data-source strategies in top-3 recommendation accuracy, which achieves a maximum accuracy of 85 %, and maintains robust performance even in scenarios involving extensive attribute changes. The proposed work provides a scientific, quantifiable, and verifiable intelligent recommendation approach for tobacco blending replacement, and offers both theoretical foundations and technical support for the rapid development of new product formulations and the efficient maintenance of historical blends.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107611"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145975806","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}

{"title":"CO2-driven suppression of toxic aromatic formation during pyrolysis of acrylic fabric waste","authors":"Chohee Yang ,&nbsp;Taewoo Lee ,&nbsp;Young-Min Kim ,&nbsp;Doyeon Lee ,&nbsp;Eilhann E. Kwon","doi":"10.1016/j.jaap.2026.107644","DOIUrl":"10.1016/j.jaap.2026.107644","url":null,"abstract":"<div><div>Given the non-biodegradable nature of synthetic textiles, their thermal treatment (incineration) presents a promising route to mitigate environmental issues associated with microfiber generation. However, this approach is hindered by the formation of toxic aromatic compounds, especially characterized when heteroatoms are present in the polymer backbones. To address this challenge, this study proposes a pyrolytic valorization of acrylic fabric waste (AFW) while using carbon dioxide (CO₂) as a detoxifying agent to suppress the toxic aromatic byproducts. Compositional analysis of AFW revealed the presence of 85 wt% polyacrylonitrile (PAN) and 15 wt% polyvinyl acetate (PVA). Pyrolysis of AFW yielded a complex mixture of volatile products, predominantly AN-derived oligomers and their aromatic derivatives; however, direct interactions between these intermediates and CO₂ were limited. To activate the reactivity of CO₂, an <em>ex-situ</em> catalytic system using a nickel (Ni)-based catalyst was integrated to the conventional pyrolysis. The Ni catalyst facilitated the cyclization and aromatization of AN-derived oligomers, while the formed aromatics were partially oxidized by CO₂ into carbon monoxide (CO), suppressing the aromatic analogues. Increasing the catalyst-bed temperature from 500 to 700 ˚C enhanced CO₂ activation and promoted the conversion of aromatics to CO. At catalyst-bed temperature of 700 ˚C, catalytic pyrolysis under CO₂ exhibited a 35.9 % reduction in toxic aromatic formation compared to pyrolysis under nitrogen environment. Overall, this work demonstrates a sustainable strategy for AFW disposal with elucidating the mechanistic role of CO₂ in transforming toxic aromatic species into detoxified gaseous products, primarily CO.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107644"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074411","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}