Journal of Analytical and Applied Pyrolysis最新文献

{"title":"Co-pyrolysis of discarded disposable tableware and bamboo chopsticks: The effect of synergistic interactions on kinetic parameters and products","authors":"Jinbao Zhang ,&nbsp;Yangyifan Zhang ,&nbsp;Huaqing Li ,&nbsp;Ya Liu,&nbsp;Fengfu Yin","doi":"10.1016/j.jaap.2026.107640","DOIUrl":"10.1016/j.jaap.2026.107640","url":null,"abstract":"<div><div>This study systematically investigates the co-pyrolysis behavior of a ternary system composed of polypropylene (PP), polystyrene (PS), and disposable bamboo chopsticks (DC), focusing on its pyrolysis characteristics, kinetic synergistic effects, and product distribution mechanisms. The reaction process was analyzed using thermogravimetric analysis (TGA), tubular furnace experiments, and GC-MS combined with various kinetic methods. The results indicate that co-pyrolysis exhibits a significant synergistic effect, with an apparent activation energy of 108.98 kJ/mol, markedly lower than the theoretical value of 217.31 kJ/mol. The kinetic mechanism follows a random nucleation and growth model (<em>A</em>_1/2). The pyrolysis oil yield reaches 67.33 %, exceeding the theoretical value of 64.78 %. Product analysis indicates that co-pyrolysis effectively promotes deoxygenation reactions and the formation of aromatic hydrocarbons. The relative contents of naphthalene derivatives, such as 1,2,3,4-tetrahydro-2-phenyl-naphthalene, and phenyl-alkene compounds are significantly increased, with the total aromatic hydrocarbon content rising by 26.54 %, while the content of oxygenated compounds is markedly reduced. Mechanistic analysis indicates that the synergistic deoxygenation primarily results from hydrogen transfer reactions and Diels–Alder pathways, effectively enhancing the quality of pyrolysis oil. This study provides a robust theoretical basis and a feasible process route for the co-pyrolysis of multi-component waste to produce high-value chemicals.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107640"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024621","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":"Hydrogenation liquefaction behavior and catalytic mechanism of Naomaohu coal-derived asphaltenes over different catalysts","authors":"Ying Zhu ,&nbsp;Mei Zhong ,&nbsp;Yang Liu ,&nbsp;Zhenghua Dai ,&nbsp;Lijun Jin ,&nbsp;Yalkunjan Tursun ,&nbsp;Shikun Li","doi":"10.1016/j.jaap.2026.107641","DOIUrl":"10.1016/j.jaap.2026.107641","url":null,"abstract":"<div><div>To elucidate the conversion mechanism of Naomaohu coal-derived asphaltenes (NMH-ASP) in the high-temperature stage during the two-stage liquefaction (TSL) process, various catalysts, including Fe₂O₃, α-FeOOH, iron stearate (FeSA) and NiMo/γ-Al₂O₃, were presulfurized at low-temperature to reveal the effect of their active phase on liquefaction performance and products selectivity. The results showed that NMH-ASP conversion and oil yield dropped in the following order at 430 °C for 60 min: NiMo/γ-Al₂O₃ (85.32 wt%; 71.20 wt%) &gt; FeSA (70.97 wt%; 63.71 wt%) &gt; α-FeOOH (68.79 wt%; 61.50 wt%) &gt; Fe₂O₃ (63.46 wt%; 54.76 wt%). The NiMoS phase from NiMo/γ-Al₂O₃ sulfurization exhibited superior H₂ activation ability, facilitating aromatic-ring hydrogenation and the cleavage of C_al–O and C_ar–O bonds, resulting in deep deoxygenation. Consequently, the liquefied oil showed the highest cycloalkane content (10.39 %) and the lowest oxygen-containing compounds (1.89 %), along with higher CO₂ content (1.50 wt%) in the gas. The Fe_1-xS phase of FeSA showed smaller, more uniform crystallite sizes, promoting the cleavage of aliphatic side chains and C_al–C_al bonds, leading to increased formation of chain alkanes (20.82 %) and C₁–C₄ gases (2.34 wt%). α-FeOOH-derived Fe_1-xS enhanced solvent hydrogen transfer to free radical fragments and promoted C_al–C_ar dealkylation, resulting in a higher benzene series content (29.62 %). However, the Fe_1-xS phase of Fe₂O₃ exhibited lower efficiency in C_ar–O bond cleavage, leading to the accumulation of phenols (8.21 %) and a higher content of the naphthalene series (43.49 %) due to insufficient aromatic-ring hydrogenation. This work provides theoretical guidance for catalyst design and process optimization in TSL.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107641"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074409","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":"Probing co-pyrolysis of rice straw with sulfur-donor thiourea: Insights into product evolution, reaction kinetics, thermodynamics, and compensation effects","authors":"Zhitong Yao ,&nbsp;Taoqi Yang ,&nbsp;Baoyi Lin ,&nbsp;Weihong Wu ,&nbsp;Yang Chen ,&nbsp;Nebojša Manić ,&nbsp;Ljiljana Medic Pejic ,&nbsp;Akash Kumar ,&nbsp;Wei Qi","doi":"10.1016/j.jaap.2026.107647","DOIUrl":"10.1016/j.jaap.2026.107647","url":null,"abstract":"<div><div>Understanding the synergistic interactions between biomass and sulfur-containing additives during co-pyrolysis is crucial for controlling sulfur transformation pathways and tailoring sulfur-doped carbonaceous materials. In the present study, the pyrolysis conversion of rice straw, thiourea, and their blend were probed using thermogravimetric analysis coupled with evolved gas analysis (TG–FTIR–MS and TG–GC/MS), isoconversional kinetics, master-plots method, and thermodynamic evaluation. The thiourea addition could alter the decomposition behavior, shifting the decomposition peaks from 335 to 348°C for rice straw and 255–266°C for thiourea to 206–241°C and 331–347°C for the blend, indicating intermolecular interactions during co-pyrolysis. Product evolution analysis revealed a transition from oxygenated volatiles (e.g., acetic acid and furan derivatives) to sulfur-containing species such as methanethiol and carbonyl sulfide, demonstrating modified reaction pathways induced by thiourea. Thermokinetics analysis showed that the average E_a of the blend (200 kJ mol⁻¹) exceeded those of individual rice straw (157 kJ mol⁻¹) and thiourea (103 kJ mol⁻¹), reflecting kinetic restructuring and the formation of thermally stabilized intermediates. Master-plots analysis identified a three-dimensional phase-boundary (R3) mechanism as dominant at conversions below 0.65, with deviations at higher conversions due to multi-step reactions. Linear correlations between apparent activation energy and pre-exponential factor indicated the occurrence of kinetic compensation effect, while thermodynamic study revealed the enthalpy–entropy compensation, with compensation temperatures matching experimental conditions. The positive values for enthalpy change (140–201 kJ mol⁻¹) and Gibbs free energy change (141–109 kJ mol⁻¹) indicating the non-spontaneous nature of these conversions. These results provided integrated kinetic, thermodynamic, and mechanistic insights into sulfur–biomass interactions during co-pyrolysis and offered guidance for controlling sulfur transformation in biomass-derived carbonaceous materials.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107647"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074406","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":"The structure-dependent regulation of CaO on NOx precursors during the pyrolysis of distinct amino acids","authors":"Jiangtao Meng ,&nbsp;Haobo Chang ,&nbsp;Lei Ren ,&nbsp;Jingkuan Li ,&nbsp;Jing Wang","doi":"10.1016/j.jaap.2026.107615","DOIUrl":"10.1016/j.jaap.2026.107615","url":null,"abstract":"<div><div>Pyrolysis conversion of sewage sludge faces a technical bottleneck of NOx pollution caused by high ash content and rich protein components. Among them, the influence of CaO on nitrogen transformation during amino acid pyrolysis is significant, yet the underlying principles and mechanisms governing its effect across amino acid with different structures remain poorly understood. To address this issue, this study focused on four representative amino acids: leucine (Leu), aspartic acid (Asp), phenylalanine (Phe), and histidine (His). It systematically investigated the migration behavior of nitrogen during their pyrolysis, which was driven by the synergistic effects of temperature and CaO. The results demonstrated that CaO reconstructed the directional migration pathways of nitrogen into char, tar, and gas. This reconstruction is achieved through four key actions: complexation, alkaline deamination, hydrolysis, and CO₂ mineralization. This reconstruction exhibits a decisive structural dependency: In polar amino acids (Asp, His), CaO strongly complexes with carboxyl/imidazole groups at low temperatures (255 ℃ and 350 ℃). This interaction traps nitrogen intermediates and diverts them toward stable structures in char, such as nitrile-N and CaCxNy. Consequently, the formation of gas-phase NOx precursors is suppressed. In contrast, for non-polar amino acids (Leu, Phe), CaO’s alkaline effect dominates, enhancing early deamination to release NH₃ and promoting nitrogen migration via the isocyanic acid pathway, which increases nitrogen allocation to the gas phase. This study has revealed the pathway reconstruction mechanism and structural response patterns of nitrogen migration during pyrolysis under CaO influence. It further proposed design strategies for the directional regulation of nitrogen, thereby providing fundamental support and a mechanistic guide for achieving low-NOx pyrolysis and the conversion of N-rich biomass into the zero-carbon fuel, NH₃.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107615"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145975328","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":"Carboxylated UiO-66 metal-organic framework-supported nickel catalyst for hydrogenation of furfural to tetrahydrofurfuryl alcohol under mild conditions","authors":"Shuailong Dong ,&nbsp;Bo Cai ,&nbsp;Xinyi Luo ,&nbsp;Mengyao Chen ,&nbsp;Hui Pan","doi":"10.1016/j.jaap.2026.107616","DOIUrl":"10.1016/j.jaap.2026.107616","url":null,"abstract":"<div><div>Selective hydrogenation is an important pathway to convert biomass-derived compounds to value-added chemicals. In this study, carboxylated metal-organic frameworks UiO-66-(COOH)₂ were prepared and used as a support to fabricate Ni-loaded catalyst by a simple impregnation method. The as-prepared catalyst 8Ni/UiO-66-(COOH)₂ could achieve a complete conversion of furfural (FAL) with a high selective yield of tetrahydrofurfuryl alcohol (THFOL) over 97 % under mild conditions (120 °C, 2 MPa H₂, 3 h). The XPS, Py-FTIR characterization showed that the introduction of a carboxyl group not only increased the acidic site of the catalyst, but also boosted the interaction between UiO-66 and metal Ni to form electron-rich Ni⁰ species. The catalyst poisoning test confirmed the critical role of the acid site in the hydrogenation of FAL. It is believed that the synergistic effect of metallic Ni and the carboxylated UiO-66 support contributed to the excellent catalytic activity of 8Ni/UiO-66-(COOH)₂. Moreover, the specific chemical adsorption of FAL on catalyst 8Ni/UiO-66-(COOH)₂ promoted the highly selective hydrogenation of FAL to THFOL. Based on the characterization and experiment results, a possible reaction pathway of the hydrogenation of FAL to THFOL over catalyst 8Ni/UiO-66-(COOH)₂ is proposed.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107616"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145975375","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":"Advances in multiphysics modelling and scale-up pathways for microwave-assisted pyrolysis in bioenergy applications","authors":"Arian Shabruhi Mishamandani ,&nbsp;Faisal Asfand ,&nbsp;Muhammad Usman Saeed Akhtar ,&nbsp;Sulaiman O. Fadlallah ,&nbsp;M. Imran Khan ,&nbsp;John M. Allport ,&nbsp;Grant M. Campbell ,&nbsp;Jose Maria Sanchez-Hervas","doi":"10.1016/j.jaap.2026.107613","DOIUrl":"10.1016/j.jaap.2026.107613","url":null,"abstract":"<div><div>Achieving a sustainable energy future requires efficient renewable conversion pathways, with biomass emerging as a promising alternative. Microwave-assisted pyrolysis (MAP) has attracted growing interest due to its high energy efficiency and product yields, yet its complex interplay of electromagnetic, thermal, and chemical processes demands advanced modelling for reliable design and optimisation. Despite the use of diverse software tools to study MAP, systematic evaluations of their capabilities remain scarce. This review critically assesses major modelling platforms used in MAP research, including process simulators (e.g., Aspen Plus, Aspen HYSYS), Computational fluid dynamics (CFD)-based solvers (e.g., COMSOL Multiphysics, ANSYS CFX, OpenFOAM), and statistical or machine learning environments (e.g., MATLAB, Design Expert). Their applications are compared in terms of feedstock dependence, operating conditions, and modelling features. Process simulators are particularly effective for flowsheet analysis and techno-economic studies, while CFD tools capture transport phenomena and reactor-scale behaviour with high resolution. Data-driven platforms complement these approaches by enabling optimisation and predictive analytics. Given the complexity of MAP, a modular modelling strategy is recommended, treating stages such as drying, heating, and pyrolysis independently with tailored methods. By consolidating existing knowledge and identifying gaps, this review provides a practical guide for researchers and engineers to select and integrate the most suitable numerical approaches for advancing MAP system development.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107613"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024337","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 mechanistic elucidation of 1-hexadecene pyrolysis as a polyethylene model compound","authors":"Yinzhi Wang ,&nbsp;Yunqing Zhou ,&nbsp;Zhenzhen Wu ,&nbsp;Hualiang Li ,&nbsp;Chuanqi Shi ,&nbsp;Siyi Bao ,&nbsp;Jianhua Yan ,&nbsp;Hao Zhang","doi":"10.1016/j.jaap.2026.107606","DOIUrl":"10.1016/j.jaap.2026.107606","url":null,"abstract":"<div><div>The pyrolysis mechanism of polyethylene (PE) remains elusive owing to its inherent complexity and the difficulty in identifying reactive intermediates. In this work, 1-hexadecene was employed as a model compound and pyrolyzed in a custom low-pressure flow tube reactor. The pyrolysis intermediates and products were detected via <em>in-situ</em> electron ionization molecular beam mass spectrometry (EI-MBMS) across 300–980 °C. A total of up to 59 species were identified, including primary pyrolysis intermediates (PPIs), primary pyrolysis products (PPPs), secondary reaction intermediates (SRIs), and secondary reaction products (SRPs), with 16 key species quantified. Three distinct pyrolysis stages were revealed: at the initial stage (320–680°C), 1-hexadecene underwent limited decomposition, dominated by <em>β</em>-scission near the double bond, producing mainly unsaturated hydrocarbons, while hydrogen transfer reactions exhibited pronounced olefin selectivity. At the stage with increasing temperature (680–880°C), the radical concentration increased sharply, promoting extensive <em>β</em>-scission and the onset of secondary reactions. Aromatic precursors such as cyclopentadiene emerged, accompanied by intensified dehydrogenation. At the final stage (880–980°C), the reactant was nearly depleted, and olefins underwent deep cracking. Both Diels–Alder reactions and the chain reaction hydrocarbon aggregation (CHRCR) mechanism jointly drove aromatization, with the propargyl radical (C₃H₃) serving as a key intermediate for the first aromatic ring formation. This study systematically elucidates the pyrolysis pathway of 1-hexadecene from radical initiation to aromatic and small-molecule formation, highlighting the temperature-dependent transition from primary bond scission to extensive dehydrogenation and aromatization. The findings offer fundamental insights for accurate modeling and optimization of polyethylene pyrolysis in chemical recycling.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107606"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145947966","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 assessment of lignin pyrolysis reactions and their interactions with polysaccharides in Japanese cedar wood cell walls by TG-MS and Py-GC/MS","authors":"Daijiro Taira,&nbsp;Takashi Nomura,&nbsp;Eiji Minami,&nbsp;Haruo Kawamoto","doi":"10.1016/j.jaap.2026.107638","DOIUrl":"10.1016/j.jaap.2026.107638","url":null,"abstract":"<div><div>Understanding the thermal degradation of lignin and polysaccharides in wood cell walls is essential for optimizing biomass pyrolysis. In this study, Japanese cedar (<em>Cryptomeria japonica</em>) 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 <em>m/z</em> values. Comparison between intact wood and isolated milled wood lignin (MWL) revealed the influence of cell wall supramolecular structures on lignin pyrolysis. The water (<em>m/z</em> 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 <em>in situ</em> C_γ oxidation—an observation rarely observed in model compound studies. The formation temperatures of pyrolysis products followed the order: β-ether bond cleavage &lt; side-chain saturation &lt; 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 <em>in situ</em> insights into the thermal degradation behavior of lignin and polysaccharides within wood cell walls, offering valuable contributions to the field of wood pyrolysis.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107638"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024627","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":"Mechanism study on the influence of moisture on the distribution of typical gases during non-caking coal pyrolysis based on ReaxFF","authors":"Jie Cui,&nbsp;Zengchao Feng","doi":"10.1016/j.jaap.2026.107635","DOIUrl":"10.1016/j.jaap.2026.107635","url":null,"abstract":"<div><div>To reveal the regulatory mechanism of moisture on the distribution of typical gases during non-caking coal pyrolysis, a single-molecule model of non-caking coal was constructed and optimized based on characterization test results, with the molecular formula C₁₇₉H₁₄₂N₂O₄₉. Four pyrolysis systems (ZR, ZQ-5 %H₂O, ZQ-15 %H₂O, and ZQ-25 %H₂O) were designed, and ReaxFF MD simulations were performed on the pyrolysis process under different final temperature conditions using a three-stage simulation strategy. The results indicate that the total mass fraction of pyrolysis gases gradually increases with the rise of moisture content. Temperature is the core regulatory factor for the generation of typical gases, while the effect of moisture is temperature-dependent. Below 3000 K, moisture inhibits CO₂ formation and promotes CH₄/C₂H₄/H₂ generation; above 3000 K, it exerts a promoting effect on all gases. Moisture significantly regulates the time sequence of gas generation and exerts differential impacts on the formation pathways of various gases: the yields of C₂H₄ and H₂ increase with increasing moisture content, CO₂ is less affected, and CH₄ shows a dual response of \"generation-consumption\". This study provides theoretical support for optimizing the non-caking coal pyrolysis process and directionally regulating gas products, and offers important reference value for the clean conversion of low-rank coal.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107635"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074413","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":"Enhanced waste-to-fuel gas conversion via co-pyrolysis of purified terephthalic acid sludge ash and phoenix tree’s leaves","authors":"Zhou Yang ,&nbsp;Hanchuan Liu ,&nbsp;Yongjuan Zhao ,&nbsp;Shiyi Ye ,&nbsp;Yulong Liang ,&nbsp;Hongyu Zhao ,&nbsp;Xinxin Xing ,&nbsp;Xiaoyuan Wang ,&nbsp;Yinfeng Wang","doi":"10.1016/j.jaap.2026.107639","DOIUrl":"10.1016/j.jaap.2026.107639","url":null,"abstract":"<div><div>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 C<img>O, C<img>C 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.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107639"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024282","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}