Journal of Analytical and Applied Pyrolysis最新文献

{"title":"Preparation and flame retardant mechanism of a novel biomass thermo-sensitive fire prevention and extinguishing gel","authors":"Tan Li ,&nbsp;Hengze Zhao ,&nbsp;Fusheng Wang ,&nbsp;Ye Li","doi":"10.1016/j.jaap.2025.107176","DOIUrl":"10.1016/j.jaap.2025.107176","url":null,"abstract":"<div><div>A novel biomass thermo-responsive composite gel (KGM@SSG) synthesized from konjac glucomannan (KGM), steel slag (SS), and silica fume (SF) prevents spontaneous coal combustion. This gel shows commendable flowability, accelerated gelation, excellent moisture retention, and superior flame-retardant properties. Compositional and structural changes were analyzed using XRD, FTIR, SEM, and TG. Results reveal that the amorphous compound Calcium (Aluminum) Silicate Hydrate (C-(A)-S-H), derived from hydrated SS and SF, integrates into KGM's three-dimensional network, enhancing robustness. Thermogravimetric analysis, thermal experiments, and in-situ infrared spectroscopy confirm that KGM@SSG mitigates temperature surges during ignition and inhibits coal decomposition. When applied to coal, it moisturizes the surface, forms a protective coating, slows temperature increases, blocks oxygen adsorption, reduces interactions between active components and oxygen species, and prevents thermal accumulation, supported by molecular dynamics simulations.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"191 ","pages":"Article 107176"},"PeriodicalIF":5.8,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071453","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":"Reverse chemical looping pyrolysis characteristics of pine wood biomass over reduced Ca2Fe2O5 oxygen carrier","authors":"Wenyao Li,&nbsp;Longxin Zhao,&nbsp;Xinyan Jiang,&nbsp;Zhiyang Yu,&nbsp;Yongzhuo Liu","doi":"10.1016/j.jaap.2025.107177","DOIUrl":"10.1016/j.jaap.2025.107177","url":null,"abstract":"<div><div>Reverse chemical looping pyrolysis (RCLPy) innovatively utilizes a reduced oxygen carrier (Re-OC) to transfer biomass oxygen during pyrolysis for subsequent semi-char gasification, thereby enhancing the quality of both bio-oils and syngas. In this study, the RCLPy characteristics of pine wood biomass was evaluated using a Ca₂Fe₂O₅-derived Re-OC under various temperatures and different mass ratios of Re-OC to biomass (Re-OC/B). The results indicated that elevated temperatures enhanced biomass cracking, while increased Re-OC/B mass ratios improved bio-oil quality by catalytic deoxygenation and in-situ hydrogenation. Specifically, Re-OC decreased the relative content of oxygenated compounds to 26.3 %, with carboxylic acids plummeting from 29.6 % (direct pyrolysis) to 1.3 %. Additionally, the Re-OC increased the relative content of phenols to 49.4 %, and the hydrogen-rich environment created by Re-OC facilitates the formation of H-phenols without methoxy groups via hydrodeoxygenation (HDO). This RCLPy strategy enables efficient oxygen-transferring and endogenous hydrogen utilization in the conversion of pine wood biomass.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"191 ","pages":"Article 107177"},"PeriodicalIF":5.8,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946557","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":"Tailoring waste sawdust-derived porous carbon through varying glycosidic bond cleavage: Analysis of pore structure mechanism and applications in supercapacitors and dye removal","authors":"Dailiu Hu ,&nbsp;Nian He ,&nbsp;Honglong Xie ,&nbsp;Zongjin Wu ,&nbsp;Zili Wang ,&nbsp;Ran Zhu ,&nbsp;Keliang Wang ,&nbsp;Hongyan Pan ,&nbsp;Zheng Chen ,&nbsp;Qian Lin","doi":"10.1016/j.jaap.2025.107178","DOIUrl":"10.1016/j.jaap.2025.107178","url":null,"abstract":"<div><div>Precise regulation of the pore structure in biomass sawdust-derived porous carbon constitutes a significant challenge in conventional activation process. Herein, we propose a molecular-level strategy to precisely modulate pore structures by regulating the cleavage ability of glycosidic bonds. The pyrolysis behavior of acetic acid-induced H₃PO₄-activated biomass sawdust, as well as the surface functional groups of the resulting pyrolysis solid products, were analyzed to reveal the mechanism underlying the pore structure regulation of carbon materials at the molecular level. Acetic acid induction facilitates the cleavage of glycosidic bonds in cellulose and hemicellulose within biomass sawdust, leading to formation of glycosylated small molecules. These molecules interact with H₃PO₄ and its derivatives to form more phospho-biopolymer complex carbides, which promotes the development of porous carbon mesoporous structures. The sample ACPA-3 prepared with acetic acid-induced H₃PO₄-activated biomass sawdust demonstrates an excellent specific surface area (2072 m²/g), mesopore volume (1.04 cm³/g), and micropore volume (0.61 cm³/g). It is exhibited a high specific capacitance of 284 F/g at 0.5 A/g, and the assembled ACPA-3//ACPA-3 symmetric supercapacitor achieved an energy density of 6.89 Wh/kg and a power density of 290.78 W/kg. In addition, this sample had a high adsorption capacity for RhB dye (1678.8 mg/g) with a removal efficiency of 96.33 %, and the adsorption process was in accordance with the pseudo-second-order kinetic model. This study provides valuable insights for the environmentally friendly synthesis of high-efficiency energy storage materials and high-value-added dye adsorbents from biomass sawdust.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"191 ","pages":"Article 107178"},"PeriodicalIF":5.8,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069951","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":"High-pressure and high-temperature pyrolysis of poplar wood catalyzed by copper slag-Al2O3 composites: Enhancing syngas composition via thermal-chemical activation","authors":"Yongnan Zhang ,&nbsp;Tianhao Shen ,&nbsp;Yunyi Liang ,&nbsp;Xia Li ,&nbsp;Huan Xie ,&nbsp;Liping Cai ,&nbsp;Yingji Wu ,&nbsp;Changlei Xia","doi":"10.1016/j.jaap.2025.107175","DOIUrl":"10.1016/j.jaap.2025.107175","url":null,"abstract":"<div><div>Poplar wood chips, a by-product of the wood processing industry, can be ground into poplar wood powder (WP). Copper slag (CS), a low-value waste product generated from the copper smelting industry, becomes rich in Fe and contains small amounts of Cu and Mg after high-temperature calcination. This composition makes CS suitable for mixing with Al₂O₃ (CSA) as a biomass pyrolysis catalyst. This study aims at investigating the effect of CSA on the pyrolysis/gasification mechanism of WP under high-temperature and high-pressure conditions, focusing on changes in pyrolysis kinetics, thermodynamics, and gas products. Based on the ratio of CSA to WP, the mixtures are categorized as WP/CSA10 and WP/CSA5. The results revealed that the addition of CSA reduced the activation energy required for the reaction by 17 % and increased the thermal decomposition rate by 18 %. The analysis of pyrolysis products indicated that CSA facilitated the generation of H₂ and CO. In the high-temperature and high-pressure pyrolysis at 950 °C, the H₂ production increased by 14 % and the CO production increased by 12 %. These results demonstrate the significant catalytic effect of CSA. This approach not only addresses the environmental burden of waste copper slag but also provides a theoretical foundation for optimizing the catalytic pyrolysis process and promoting the high-value utilization of WP.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"191 ","pages":"Article 107175"},"PeriodicalIF":5.8,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071452","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":"Corrigendum to “Release behaviors and catalytic effects of alkali and alkaline earth metals in coke from rapid pyrolysis of wheat straw” [J. Anal. Appl. Pyrolysis 190 (2025) 107160]","authors":"Jiaxi Wang ,&nbsp;Lu Ding ,&nbsp;Zhuang Sun ,&nbsp;Qinghua Guo ,&nbsp;Yan Gong ,&nbsp;Guangsuo Yu","doi":"10.1016/j.jaap.2025.107173","DOIUrl":"10.1016/j.jaap.2025.107173","url":null,"abstract":"","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"190 ","pages":"Article 107173"},"PeriodicalIF":5.8,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154515","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":"Insights into pyrolysis and oxidation of 1,3-dioxane: Experimental and kinetic modeling study","authors":"Wenjun Wu,&nbsp;Yilun Liang,&nbsp;Mo Yang,&nbsp;Yuyang Zhang,&nbsp;Juan Wang","doi":"10.1016/j.jaap.2025.107174","DOIUrl":"10.1016/j.jaap.2025.107174","url":null,"abstract":"<div><div>1,3-Dioxane (DIOX) is a significant synthetic biofuel that contributes to achieving carbon peak and carbon neutrality goals. However, there is a relative scarcity of research on the pyrolysis and oxidation reaction kinetics of 1,3-dioxane. To gain deeper insights into the kinetic mechanisms of 1,3-dioxane pyrolysis and oxidation, the experimental and simulated analyses of 1,3-dioxane were carried out at intermediate temperatures in this work. The concentration curves of small molecule products and major intermediates were measured using GC and GC-MS. A new detailed kinetic mechanism was developed based on typical reaction classes and rate coefficients, and validated with the experimental data. In comparison to previous models, the new mechanism incorporates carbene reactions, which are significant for the initial decomposition pathways of 1,3-dioxane. The reaction network was further refined with the detection of key intermediates C₃H₅OCHO (CH₃CH=CH-O-CH=O) and C₂H₃CHO (CH₂=CH-CH=O) in this work. Model analysis shows that the fuel radical dehydrogenation to olefin plays a more dominant role at <span><math><mrow><mtext>ϕ = </mtext><mn>2.0</mn></mrow></math></span> than <span><math><mrow><mtext>ϕ = </mtext><mn>0.5</mn></mrow></math></span>, while the isomerization reaction of RȮ₂ to Q̇OOH is much weaker under fuel-rich condition. The reaction network analysis suggests that 4,5-dihydro-1,3-dioxin (DIOXENE) is the core precursor for C₃H₅OCHO and C₂H₃CHO, which are also precursors for some small molecule products. Furthermore, the kinetic model was validated against ignition delay times, and the simulated results demonstrate that the model accurately reflects the actual combustion characteristics of the fuel above 750 K. In general, the new detailed model in this work shows good prediction ability for the concentration trends of major products and combustion properties.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"191 ","pages":"Article 107174"},"PeriodicalIF":5.8,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069952","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":"Quantification of polyethylene in biodegradable plastics by analytical pyrolysis-based methods with GC split modulation","authors":"Marco Mattonai ,&nbsp;Federica Nardella ,&nbsp;Marta Filomena ,&nbsp;Sebastià Gesti ,&nbsp;Gabriele Medaglia ,&nbsp;Erika Ribechini","doi":"10.1016/j.jaap.2025.107172","DOIUrl":"10.1016/j.jaap.2025.107172","url":null,"abstract":"<div><div>Two methods based on double-shot analytical pyrolysis-GC/MS (DSPy-GC/MS) and evolved gas analysis-MS (EGA-MS) were developed to quantify polyethylene (PE) in biodegradable plastics (BPs). BPs are widely used to produce short-lived goods such as shopping bags, packaging, and disposable tools. Small amounts of non-biodegradable plastics, namely PE, are added to BP formulations to reduce costs and improve processability. Current European regulations allow for a maximum 1% PE content by weight in biodegradable plastics, but no information is provided on how this content should be measured. The methods presented here were developed using a set of reference samples composed of common BP formulations with known added amounts of PE. The methods were tested for linearity, accuracy, matrix effect, and limits of detection and quantification. In the EGA-MS method, a new strategy based on mid-run split switch was developed, resulting in a significant increase of the signal of PE. Both methods proved capable of quantifying PE in concentrations of 1% or lower and showed negligible matrix interference. The EGA-MS method is faster, while the DSPy-GC/MS method provides lower limits of quantification. The results indicate that both methods could be used for routine quality control and conformity analysis of BPs. This is the first work describing quantification of PE in BPs using analytical pyrolysis-based techniques. The use of EGA-MS for quantitative analysis, and the use of mid-run split switch, are also presented in this paper for the first time.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"191 ","pages":"Article 107172"},"PeriodicalIF":5.8,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946688","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":"Kinetic characteristics and product distribution of tar-rich coal in-situ underground pyrolysis: Influence of multifunctional proppants","authors":"Wei Guo ,&nbsp;Zunyi Yu ,&nbsp;Panxi Yang ,&nbsp;Hongqiang Li ,&nbsp;Jing Wang ,&nbsp;Keming Fu ,&nbsp;Bolun Yang ,&nbsp;Zhiqiang Wu","doi":"10.1016/j.jaap.2025.107171","DOIUrl":"10.1016/j.jaap.2025.107171","url":null,"abstract":"<div><div>An iron-based multifunctional proppant was developed to enable in-situ pyrolysis of tar-rich coal underground. Thermogravimetric experiments were conducted to deeply explore the influence mechanism of the multifunctional proppants on the pyrolysis of tar-rich coal. By calculating the comprehensive pyrolysis index, it is found that the comprehensive pyrolysis index is increased from 1.13 × 10⁻⁸/%²·min⁻²·°C⁻³ to 1.309 × 10⁻⁸/%²·min⁻²·°C⁻³ by multifunctional proppants. The macro activation energy of pyrolysis weight loss of tar-rich coal is calculated by KAS model and DAEM model. Experimental findings reveal a reduction in activation energy enabled by multifunctional proppants. In addition, the distribution of pyrolysis products and tar components was analyzed through pyrolysis experiments in the tube furnace. Experimental results revealed a 10.5 % enhancement in the light fraction content of tar following the addition of multifunctional proppants. DTG curves peak fitting revealed the action mechanism of multifunctional proppants during pyrolysis reaction stages. Pyrolysis reaction pathways for tar-rich coal in the presence of multifunctional proppants were analyzed. Catalysis of tar upgrading by multifunctional proppants during tar-rich coal pyrolysis is supported by experimental findings. In particular, the Fe₂O₃-loaded multifunctional proppants hold significant potential for underground in-situ pyrolysis of tar-rich coal.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"191 ","pages":"Article 107171"},"PeriodicalIF":5.8,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144099658","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":"Linking microalgae characteristics with their fast pyrolysis products","authors":"Gontzal Lezcano ,&nbsp;Ribhu Gautam ,&nbsp;Idoia Hita ,&nbsp;Attada Yerrayya ,&nbsp;Jinan Aljaziri ,&nbsp;Bárbara Bastos de Freitas ,&nbsp;Vasileios G. Samaras ,&nbsp;Kyle J. Lauersen ,&nbsp;S. Mani Sarathy ,&nbsp;Pedro Castaño","doi":"10.1016/j.jaap.2025.107170","DOIUrl":"10.1016/j.jaap.2025.107170","url":null,"abstract":"<div><div>This study investigated the relationships between microalgal characteristics, reaction temperature, and pyrolysis products using eight microalgal species. Proximate, ultimate, and biochemical analyses were conducted to characterize these microalgae. Fast pyrolysis was performed in a Pyroprobe® coupled to a two-dimensional gas chromatograph and a time-of-flight mass spectrometer at 450–650 °C. The solid residues ranged from 14.9–59.1 % across all pyrolysis tests. The experimental dataset comprised 24 instances with 27 features, including microalgal composition, temperature, biochar yield, and product composition. Multivariate analyses were employed to interpret this dataset, including Pearson correlation analysis, principal component analysis (PCA), and canonical correlation analysis (CCA). Pearson correlation analysis showed biochar yields positively correlated with ash and moisture contents and negatively with volatile matter; proteins exhibited the highest charring tendency. PCA identified species-specific product patterns, e.g., <em>Arthrospira (Limnospira) platensis</em> was linked to nitrogenates and aromatics, while <em>Odontella aurita</em> produced sulfur compounds despite moderate sulfur content. PCA also indicated that oxygen and lipids were not key to aromatic formation. CCA revealed that the strong correlation between pyrolysis temperature and aromatics was partly due to protein content and highlighted a distinct link between chlorophyll content and alcohol production. Overall, this work highlights the potential of innovative microalgae as feedstocks for fast pyrolysis and emphasizes the utility and potential of multivariate tools for interpreting complex experimental datasets.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"191 ","pages":"Article 107170"},"PeriodicalIF":5.8,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071451","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":"Converting polyolefin mixtures into fuels via a closed-system pyrolysis process","authors":"Georgina C. Laredo,&nbsp;Alfonso López-Ortega,&nbsp;Edith Meneses Ruiz,&nbsp;Patricia Pérez-Romo,&nbsp;Joel Reza","doi":"10.1016/j.jaap.2025.107159","DOIUrl":"10.1016/j.jaap.2025.107159","url":null,"abstract":"<div><div>This work examined the effects of the experimental conditions in an oxygen-free closed system on the pyrolysis process of a polyolefin mixture (PO) composed of 40 % medium-density polyethylene (MDPE), 35 % low-density polyethylene (LDPE), and 25 % polypropylene (PP). The goal was to get the best yields and quality of gasoline and diesel-type fuels. The effect of the autogenic pressure was studied by varying the temperature (400, 425, and 450 °C) and reaction time (1, 5, 15, 30, and 45 minutes). The effect of the initial pressure (10, 20, 30, 40, and 50 bar) was studied at 425 °C and 60 minutes. The products obtained were gas, oil, and wax. The presence of coke was not observed. The preferred product for fuel production was oil. The temperature of the pyrolysis process decreased to 400–450 °C in an oxygen-free closed system from a usual 550 °C when the procedure was conducted in an open system. Gas and liquid chemical composition and simulated distillation behaviors were also studied in both processes. In the autogenic pressure process, the optimal variables for higher yield and quality of the fuel-like products were 425 °C, 30–45 min, and up to 33 bar. The effect of the initial pressure showed that higher pressures did not present an advantage in the PO cracking process. While the autogenic pressure was the result of an increasing gas formation and therefore presented an important effect on the products obtained, higher initial pressures (above 10 bar) seemed not to be required for the increment in the yield or quality of the products.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"190 ","pages":"Article 107159"},"PeriodicalIF":5.8,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941275","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}