Journal of Analytical and Applied Pyrolysis最新文献

{"title":"Influence of biomass type and pyrolysis temperature on biochar characteristics for enhanced soil amendment","authors":"Chenxu Zhang ,&nbsp;Na Liu ,&nbsp;Tianli Zhang ,&nbsp;Shichao Su ,&nbsp;Rui Li ,&nbsp;Jun Feng ,&nbsp;Yulong Wu","doi":"10.1016/j.jaap.2025.107257","DOIUrl":"10.1016/j.jaap.2025.107257","url":null,"abstract":"<div><div>Biochar is a promising soil amendment, but its properties vary significantly based on biomass type and pyrolysis conditions. This study investigates the effects of feedstock type (sawdust, cotton stalk, reed cane, and sewage sludge) and pyrolysis temperature (400 −700 °C) on biochar yield and properties, focusing on chemical composition, and the effect of biomass chars on soil amendment for lettuce growth was determined with pot experiments. The results showed that the yield of biochar decreased geometrically with the increase of pyrolysis temperature, and the specific surface area and total pore volume of the all biochars increased, while the average pore diameter decreased. Sawdust, cotton stalk, and reed cane char exhibit well-developed aromatic porous structures and possess a higher carbon content. In contrast, sludge char had a comparatively lower carbon content, accompanied with high ash and nitrogen contents. Compared to control, the addition of biochar into soil significantly enhanced the plant growth. The maximum phytomass increases were 61.66 %, 81.81 %, and 101.41 %, with the addition of 3 % sawdust char, 3 % reed cane char, and 5 % sludge char, respectively. This observation may be benefited from the relatively higher specific surface area of reed cane char and the high C/N in sludge and sawdust char, improving the water retention, organic matter, and total nitrogen of soil. Conversely, the addition of more than 3 % cotton stalk char led to plant yield reduction and even death. This was due to the elevated levels of inorganic salts containing K and Na in the cotton stalk char.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"192 ","pages":"Article 107257"},"PeriodicalIF":5.8,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144522788","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":"Assessing carbon negative potential in CO2-mediated pyrolysis of agricultural residue","authors":"Taewoo Lee ,&nbsp;Gitae Moon ,&nbsp;Jechan Lee ,&nbsp;Seong-Ho Jang ,&nbsp;Yiu Fai Tsang ,&nbsp;Eilhann E. Kwon","doi":"10.1016/j.jaap.2025.107259","DOIUrl":"10.1016/j.jaap.2025.107259","url":null,"abstract":"<div><div>Wheat straw (WS), one of the most abundant agricultural residues, has garnered attention as a renewable alternative to petroleum-derived carbon resources. However, current biofuel production faces challenges in realizing efficient carbon use. To address this, pyrolysis offers a promising platform capable of converting all the carbon in WS into value-added pyrogenic products such as syngas, biocrude, and biochar. This study focused on enhancing carbon-negative potential of WS pyrolysis by incorporating carbon dioxide (CO₂) as partial oxidant and carbon resource. At temperatures ≥ 430˚C, CO₂ interacted homogeneously with volatiles pyrolyzed from WS and converted them into carbon monoxide (CO), contributing to carbon-negative character to the pyrolysis system. To accelerate the kinetics of CO₂-driven reactions, the pyrolysis setup was systematically modified by delivering an additional heat and introducing a nickel catalyst. Additionally, two process parameters (reaction temperature and CO₂ concentration) were tailored to optimize CO-rich syngas production. The energy requirements and net CO₂ emissions of CO₂-mediated catalytic pyrolysis were evaluated under optimal conditions. CO₂-mediated catalytic pyrolysis of WS demonstrated a carbon-negative potential of 1260 mg CO₂ per gram of WS. Therefore, this finding offers opportunities to suppress 1235 million tons of CO₂ annually across the agricultural sector linked to wheat straw harvest.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"192 ","pages":"Article 107259"},"PeriodicalIF":5.8,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144522785","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":"Synergistic mechanism in H3PO4/Fe2O3 co-assisted bamboo slow pyrolysis for enhanced biochar carbon retention and applications on green low-carbon cement","authors":"Xu Hu ,&nbsp;Rui Diao ,&nbsp;Fenglei Qi ,&nbsp;Zhenting Zha ,&nbsp;Binglin Guo ,&nbsp;Peiyong Ma ,&nbsp;Xianjun Xing","doi":"10.1016/j.jaap.2025.107258","DOIUrl":"10.1016/j.jaap.2025.107258","url":null,"abstract":"<div><div>Additives-assisted bamboo pyrolysis is an efficient method for enhancing carbon retention of biochar. Herein, we propose the utilization of synergistic H₃PO₄/Fe₂O₃ co-assisted bamboo pyrolysis, which strengthens biochar yield and carbon retention. The results indicated that the synergistic effect of H₃PO₄ and Fe₂O₃ increased biochar yield and carbon retention, compared with biochar doped with H₃PO₄ or Fe₂O₃ alone (with an increase of 6.95 % and 7.78 %, respectively). In the H₃PO₄/Fe₂O₃ co-assisted pyrolysis process, P-O-C and Fe-OH structures were formed in the biochar, which generated a physical barrier on the surface of biochar and promoted its resistance to oxidation and biomineralization, leading to more carbon retention and a high yield. Meanwhile, phosphorus/iron synergistic doping of biochar in cement modification enhances the compressive properties of cement, which provides a non-returned field biochar disposal method to avoid environmental pollution. The results of cement compressive properties showed that the addition of the prepared biochar improved the mechanical properties of cement by 17.7 %-27.7 %. This study provides a synergistic H₃PO₄/Fe₂O₃ co-assisted bamboo slow pyrolysis in terms of product distribution, biochar formation mechanism, so that synergistic enhancement of biochar yield and carbon retention can be achieved, and successfully applied to cement modification, creating a green low-carbon cement carbon sink.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"192 ","pages":"Article 107258"},"PeriodicalIF":5.8,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144534699","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":"Pyrolysis mechanism and characteristics of a novel promising energy rich polysaccharide based on chitin","authors":"Sylia Ouahioune ,&nbsp;Ahmed Fouzi Tarchoun ,&nbsp;Djalal Trache ,&nbsp;Amir Abdelaziz ,&nbsp;Ahmed Abderraouf Benghali ,&nbsp;Fouad Benaliouche ,&nbsp;Weiqiang Pang","doi":"10.1016/j.jaap.2025.107256","DOIUrl":"10.1016/j.jaap.2025.107256","url":null,"abstract":"<div><div>Chitin, a widely available biopolymer, remains underexplored in energetic materials. To address this gap, this study focuses on the synthesis and pyrolysis mechanism of a novel energetic polysaccharide derived from nitration of chitin. Nitrochitin (NCT) and its precursor were extensively characterized using various analytical techniques, confirming the successful functionalization of chitin via electrophilic nitration. The structural and physicochemical properties of NCT were examined using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), elemental analysis, and an electronic densimeter. Experimental findings demonstrated that the synthesized NCT exhibits promising physicochemical characteristics. Additionally, the thermal behavior of nitrated chitin was investigated using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The results revealed that NCT undergoes two consecutive exothermic decomposition processes within the temperature ranges of 135–185 °C and 192–244 °C. Furthermore, the thermal decomposition mechanism was elucidated using hyphenated TGA-FTIR analysis. The evolved gases indicated a complex mixture primarily composed of carbon dioxide (CO₂), nitrogen oxides (NO₂), water vapor (H₂O), methane (CH₄), hydrogen cyanide (HCN), formaldehyde (CH₂O), acetamide (CH₃CONH₂), and acetic acid (CH₃COOH). These findings highlight the potential of the newly synthesized NCT as a promising component for use in explosives and solid rocket propellants.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"192 ","pages":"Article 107256"},"PeriodicalIF":5.8,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144522780","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":"Leveraging explainable AI framework for predictive modeling of products of microwave pyrolysis of lignocellulosic biomass using machine learning","authors":"Ritisha Digvijay Kale ,&nbsp;Maheswata Lenka ,&nbsp;Chinta Sankar Rao","doi":"10.1016/j.jaap.2025.107249","DOIUrl":"10.1016/j.jaap.2025.107249","url":null,"abstract":"<div><div>The accurate prediction of biochar, bio-oil, and biogas yields in biomass pyrolysis is critical for optimizing process efficiency and sustainable biofuel production. In this study, machine learning (ML) models were developed using literature-derived data on biomass composition and pyrolysis conditions to predict product yields. A comparative analysis of multiple ML algorithms revealed that Decision Tree and Extra Trees exhibited the highest predictive accuracy, followed by Random Forest, Gradient Boosting Trees, and Extreme Gradient Boosting. LightGBM, Gaussian Process Regression, and CatBoost provided moderate performance, while AdaBoost demonstrated the lowest accuracy. To enhance interpretability, Explainable Artificial Intelligence (XAI) techniques, specifically SHAP analysis, were employed to identify key factors influencing pyrolysis yields. Temperature, ash content, fixed carbon, and moisture content were the dominant parameters governing biochar yield, whereas heating rate, reaction time, and feedstock properties such as carbon and volatile matter content significantly influenced bio-oil production. The gas yield was primarily driven by temperature, with secondary cracking mechanisms enhancing non-condensable gas formation. These insights provide a data-driven foundation for optimizing biomass pyrolysis processes, enabling targeted valorization strategies for lignocellulosic feedstocks. The integration of ML and XAI in this study establishes a transparent and interpretable modeling framework, facilitating informed decision-making for sustainable biofuel production.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"192 ","pages":"Article 107249"},"PeriodicalIF":5.8,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144522781","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":"Optimizing lignin oxidative depolymerization in single-phase binary solvent systems","authors":"Fanshun Meng ,&nbsp;Shumin Wang ,&nbsp;Suyuan Jia ,&nbsp;Xiangyu Li ,&nbsp;Junyou Shi ,&nbsp;Wenbiao Xu","doi":"10.1016/j.jaap.2025.107253","DOIUrl":"10.1016/j.jaap.2025.107253","url":null,"abstract":"<div><div>Lignin, a major component of lignocellulosic biomass, represents a promising renewable resource for the production of aromatic chemicals. However, its recalcitrant structure and chemical complexity pose significant challenges for efficient catalytic valorization. The low monomer yields and frequent repolymerization in conventional oxidative depolymerization systems further limit practical applications. This study aims to enhance lignin depolymerization efficiency through the use of binary solvent systems. Two solvent systems—methanol/water and methanol/formic acid—were evaluated for their effects on product yield and selectivity. Under optimized conditions, the methanol/formic acid system afforded a significantly higher monomer yield (21.99 wt%) compared to methanol/water. In this system, water helped stabilize the thermal environment, while formic acid acted both as solvent and hydrogen donor, facilitating bond cleavage and improving selectivity. These results underscore the importance of solvent composition and reaction conditions in achieving efficient lignin valorization for high-value chemical production.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"192 ","pages":"Article 107253"},"PeriodicalIF":5.8,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144522831","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":"Role of pH catalysis during hydrothermal carbonization of digestate in biogas slurry: Mechanisms of nitrogen speciation and transformation","authors":"Xia Wang ,&nbsp;Fang Wang ,&nbsp;Deli Zhang ,&nbsp;Huanlian Wang ,&nbsp;Jingjuan Fan ,&nbsp;Taili Dong ,&nbsp;Xianfa Sun ,&nbsp;Weiming Yi","doi":"10.1016/j.jaap.2025.107251","DOIUrl":"10.1016/j.jaap.2025.107251","url":null,"abstract":"<div><div>Large amounts of biogas slurry and digestate waste not only impose an environmental burden, but also hinder the further development of anaerobic digestion. Hydrothermal carbonization (HTC) facilitates the valorization of high-moisture solid waste. In this study, the effect of initial pH (2.5–13.5) of biogas slurry on nitrogen (N) transformation during the HTC of livestock manure digestate was investigated. The migration of N was closely related to pH, and acidic environment effectively enriched N in hydrochar (HC). The N element in HC was mainly presented in heterocyclic forms, with pyridine-N and quaternary-N being the most stable. The N content of HC at pH 2.5, 4, and 6 was 2.10 %, 1.81 %, and 2.28 %, respectively. And the corresponding sum proportion of pyridine-N and quaternary-N was 55.08 %, 39.76 %, and 35.53 %, which was significantly higher than in alkaline environment. Compared with HC-8 (HC obtained at pH 8), the C and N contents in HC 2.5–6 increased by 12.80 % - 45.71 % and 17.53 % - 48.05 %, respectively, indicating C and N contents were higher in HC prepared under acidic conditions compared to neutral and alkaline conditions. Results indicated that the acidic environment promoted the formation of pyridine-N and quaternary-N, which strengthened the Maillard and Mannich reactions. In contrast, alkaline environment hindered protein hydrolysis and suppressed the polycondensation of pyrrole-N. The results provide a basis for pH regulation to control N species in HC, optimizing the HTC process for efficient N recovery and high-value waste utilization.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"192 ","pages":"Article 107251"},"PeriodicalIF":5.8,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144534700","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":"Influence of pyrolysis temperature on crude palm pyrolysis oil from fresh palm fruit bunches in a double-inclined screw reactor","authors":"Nathawat Unsomsri ,&nbsp;Songkran Wiriyasart ,&nbsp;Sittinun Tawkaew ,&nbsp;Sommas Kaewluan","doi":"10.1016/j.jaap.2025.107250","DOIUrl":"10.1016/j.jaap.2025.107250","url":null,"abstract":"<div><div>Thailand, one of the world’s largest crude palm oil producers, faces increasing energy demands and dependence on fossil fuel imports. This study presents a novel application of a double-inclined screw reactor for the slow pyrolysis of fresh palm fruit bunches (FFB). The effects of temperature variation (400°C, 500°C, and 600°C) on product yields and pyrolysis oil properties were systematically analyzed. The results showed that higher temperatures increased pyrolysis gas production (27.3 % at 400°C to 31.95 % at 600°C) while reducing pyrolysis oil yield (25.2 % to 16.4 %) due to enhanced thermal cracking. Biochar yield slightly declined, whereas wood vinegar increased from 37.8 % to 42.5 %, indicating greater decomposition of cellulose and hemicellulose. The physicochemical analysis of pyrolysis oil revealed a lower heating value ranging from 38.2 to 39.2 MJ/kg. While 400°C provided the highest oil yield, it contained a higher proportion of oxygenated compounds, reducing stability. 500°C was identified as the optimal pyrolysis temperature, offering a balance between oil yield (21.9 %) and quality, with lower oxygen content, improved stability, and better combustion properties. These findings highlight the potential of FFB-derived crude pyrolysis oil as a promising alternative fuel. Furthermore, the use of a double-inclined screw reactor proved effective for producing high-quality bio-oil from palm-based biomass, offering a novel approach to sustainable energy production for continuous industrial applications.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"192 ","pages":"Article 107250"},"PeriodicalIF":5.8,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144522779","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":"Multi - scale perspective on hydrothermal treatment dewatering of lignite: Synergistic regulation of structural evolution and lightening of pyrolysis tar","authors":"Shucheng Liu ,&nbsp;Haojie Yang ,&nbsp;Yichao Zhang ,&nbsp;Qingzhou Zeng ,&nbsp;Fugui Liu ,&nbsp;Keli Zhu ,&nbsp;Jun Zhang ,&nbsp;Hongyu Zhao ,&nbsp;Ming Zeng","doi":"10.1016/j.jaap.2025.107247","DOIUrl":"10.1016/j.jaap.2025.107247","url":null,"abstract":"<div><div>Hydrothermal treatment dewatering (HTD) is a promising method for upgrading lignite. However, the mechanistic links between its structural modifications and the regulation of pyrolysis tar remain unclear. In this paper, the cascade effect of HTD on the physicochemical structure and pyrolysis tar components of lignite is systematically revealed by combining multi-scale characterization techniques (XPS, FTIR, BET) with Pyrolysis-Gas Chromatography/Mass Spectrometry (Py-GC/MS). The results show that the HTD process (330°C) can significantly reduce the moisture content (12.4 %→2.7 %) and oxygen content (38.00 %→31.89 %) of lignite. Moreover, the cleavage of O-containing groups and the decomposition of aliphatic chains drive the aromatization of organic structure during the HTD process. The XPS results show that the proportion of aromatic carbon content increased from 48.74 % to 70.85 %. These changes also directly affect the composition of the pyrolysis tar of lignite. The Py-GC/MS results indicate that the contents of aliphatic hydrocarbons and O-containing compounds in the tar continuously decrease with increasing HTD temperature, while the proportion of aromatic hydrocarbons significantly rises to 30.57 %. The content of phenolic compounds follows a non-linear trend, first increasing and then decreasing due to the hydrolysis and decomposition of hydroxyl functional groups. Additionally, the HTD process promotes the lightening of pyrolysis tar. For instance, the relative content of small-molecule aliphatic hydrocarbons (C4-C9) increases to 64.45 %, and the relative proportion of monocyclic aromatic hydrocarbons reaches 78.81 %. HTD is an effective method to improve quality of pyrolysis tar. The underlying mechanism is attributed to the synergistic effects of the distribution characteristics of functional groups, radical enrichment, and suppressed cross-linking. The research results provide key theoretical support for regulating the hydrothermal process of lignite and for preparing light tar with high added value.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"192 ","pages":"Article 107247"},"PeriodicalIF":5.8,"publicationDate":"2025-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144518727","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":"Dynamic migration mechanisms valuable elements in low-rank coal during hydrous thermal simulation: A case study of the Hedong coalfield, Ordos Basin, China","authors":"Ke Zhang ,&nbsp;Songhang Zhang ,&nbsp;Shuheng Tang ,&nbsp;Yang Chen ,&nbsp;Jiayu Zhai ,&nbsp;Wenguang Tian","doi":"10.1016/j.jaap.2025.107248","DOIUrl":"10.1016/j.jaap.2025.107248","url":null,"abstract":"<div><div>Valuable trace elements in coal can contribute critical geological insights into the formation and evolution processes of coal-bearing basins and the development characteristics of strata. The migration and enrichment mechanism are a key scientific issue in solving the mineralization of coal-bearing metal minerals. The migration and occurrence patterns of valuable trace elements during thermal evolution are extremely complex, so it is particularly crucial to comprehend the migration mechanism of trace elements in coal seams. Taking low-rank bituminous coal in Hedong coalfield as the research object, hydrous thermal simulation experiments with a large water volume and a large sample volume (1.5 mL water: 1 mL coal) were conducted in the range of 250℃ ∼ 550℃ (interval of 50℃) to systematically explore the migration and enrichment behavior of valuable trace elements under varying temperatures. The results show the following: 1) The content of Al in clay minerals changes more with the increase in temperature than that of Si in quartz. Ca and P, associated with organic matter, readily migrate into gaseous or liquid products, and Mg and Fe coexist in sulfate minerals. 2) At 250℃ ∼ 400℃, temperature is the dominant factor, where Ga, V, Hf, Zr, Th, and REY combined with organic matter are released with volatile matter and migrate into gaseous and water products. At 450℃ ∼ 550℃, temperature and water jointly influence the dissolution and migration of trace elements in certain minerals. 3) The enrichment and volatilization rates of Li in aluminosilicate minerals are different from those of other valuable metal elements associated with organic matter. 4) Trace element content prediction models based on the random forest algorithm effectively estimate the contents of Li, V, Sr, Th, Zr, and REY, although the accuracy of the predictive model is limited by the quality of the dataset. Hydrous thermal simulation experiments revealed the occurrence and migration mechanism of valuable trace elements, providing a theoretical basis for the exploration and efficient development of key metal resources in coal-bearing minerals, which has important practical value for improving the comprehensive utilization of coal resources.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"192 ","pages":"Article 107248"},"PeriodicalIF":5.8,"publicationDate":"2025-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144522786","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}