FuelPub Date : 2025-04-25DOI: 10.1016/j.fuel.2025.135473
Huiyi Xiao , Tao Hu , Xiongqi Pang , Chenxi Ding , Yunlong Xu , Sijia Zhang , Yao Hu , Caijun Li , Tianwu Xu , Dingye Zheng , Shu Jiang , Maowen Li
{"title":"A novel method for identifying oil content and moveable thresholds in heterogeneous shales","authors":"Huiyi Xiao , Tao Hu , Xiongqi Pang , Chenxi Ding , Yunlong Xu , Sijia Zhang , Yao Hu , Caijun Li , Tianwu Xu , Dingye Zheng , Shu Jiang , Maowen Li","doi":"10.1016/j.fuel.2025.135473","DOIUrl":"10.1016/j.fuel.2025.135473","url":null,"abstract":"<div><div>The exploitation of shale oil is one of the most crucial strategies for alleviating energy shortages, and identifying high-quality oil content sweet spots is a top priority. The common oil content evaluation models typically apply a relatively fixed oil rich threshold and an oil moveable threshold as constraints. However, the high degree of heterogeneity of terrestrial shales means that the accuracy and practicality still require improvement. Here the ΔQ value was introduced to distinguish whether the shale is receiving or expelled hydrocarbon, and validated the comparison using geologic and geochemical data from these two types of shale. Based on the realization that hydrocarbon-accepting shales have high oil content and mobility, first-level and second-level oil quality thresholds are divided and identified, which represent the boundaries of oil quality from poor to good. The application of this model was demonstrated using 225 continuously cored shale samples from the Shahejie Formation of the Dongpu Depression in the Bohai Bay Basin. The results showed that three resource quality tiers were defined: high-quality (S1 ≥ 3.77 mg/g & OSI ≥ 235 mg/g TOC, 12 % of total resources), medium (0.75 mg/g ≤ S1 < 3.77 mg/g & 94 mg/g TOC ≤ OSI < 235 mg/g TOC, 32.44 % of total resources) and poor (S1 < 0.75 mg/g & OSI < 94 mg/g TOC, 55.56 % of total resources). ΔQ can be used as a constraint to quickly and accurately identify the oil quality threshold for strongly heterogeneous shale, thus avoiding the complex process of analyzing the influencing factors. In addition, this study found that high-quality shale oil is generally found in received hydrocarbon shale, which mainly exhibit laminated-carbonate lithofacies, and a high frequency interlayering or fracture development. In particular, the expelled hydrocarbon shale’s hydrocarbon generation potential and expelled hydrocarbon efficiency together determine oil quality. Overall, this study is expected effectively reduce potential shale oil exploration risks.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135473"},"PeriodicalIF":6.7,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2025-04-25DOI: 10.1016/j.fuel.2025.135486
Deyu Tang , Qinan Wu , Jiaguang Zheng , Ao Xia , Zhenxuan Ma , Zhendong Yao , Chao Su
{"title":"Over 6 wt% hydrogen release below 60 ℃ from LiAlH4 triggered by fluorinated acetylene black","authors":"Deyu Tang , Qinan Wu , Jiaguang Zheng , Ao Xia , Zhenxuan Ma , Zhendong Yao , Chao Su","doi":"10.1016/j.fuel.2025.135486","DOIUrl":"10.1016/j.fuel.2025.135486","url":null,"abstract":"<div><div>Lithium aluminum hydride (LiAlH<sub>4</sub>) has been acknowledged as a vital solid-state hydrogen storage material with its large dehydrogenation capacity of 10.6 wt%. However, pure LiAlH<sub>4</sub> was hard to release hydrogen under 120 ℃, which strongly hindered its practical application. In this study, solid-state fluorinated acetylene black (FAB) was used as an additive to destabilize LiAlH<sub>4</sub>. According to the experimental results, FAB-doped LiAlH<sub>4</sub> could achieve an ultrafast one-step hydrogen release over 6 wt% hydrogen release, which could be fully accomplished below 60 ℃, showing a great potential to be used as an easy hydrogen source. Through the microstructural study, it was found that FAB nano-sized particles adhered to the surface of LiAlH<sub>4</sub>. Then this structure increased the activation sites, and triggered the fast heat emission and hydrogen release of LiAlH<sub>4</sub> during the dehydrogenation process. Moreover, the dehydrogenation reaction path was changed by the doping of FAB, which greatly lowering the dehydrogenation enthalpy change of LiAlH<sub>4</sub>. This study provides some inspiration for the utilization of LiAlH<sub>4</sub> as an easy one-time hydrogen source under moderate environment.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135486"},"PeriodicalIF":6.7,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2025-04-25DOI: 10.1016/j.fuel.2025.135487
Lian Zhu, Youwei Cheng, Yaqiong Gong
{"title":"In-situ growth of CuCoZn metallic inclusions via surface alloying for enhanced water oxidation at amperometric current densities","authors":"Lian Zhu, Youwei Cheng, Yaqiong Gong","doi":"10.1016/j.fuel.2025.135487","DOIUrl":"10.1016/j.fuel.2025.135487","url":null,"abstract":"<div><div>There is a substantial demand for low-cost, efficient, and stable oxygen evolution reaction (OER) catalysts capable of operating at amperometric current densities green hydrogen production, which is crucial for the future transformation of the energy structure. In this study, OER catalysts (V<sub>Zn</sub>-Co@Cu<sub>2</sub>S) featuring with Zn ionic vacancies were synthesized via the introduction of guest elements surface alloying technique. Electrochemical tests have demonstrated that the electrochemical OER process involves the surface reconstruction to expose the practical positive active substance (MOOH), with Zn as a sacrificial cation, effectively prevents the overoxidation of the surface metal thereby significantly enhances the catalytic performance. Under the synergistic effect of Cu, Co, and Zn metals, catalyst V<sub>Zn</sub>-Co@Cu<sub>2</sub>S showed remarkable OER performance, achieving an overpotential of only 360 mV at a current density of 1000 mA cm<sup>−2</sup>. Furthermore, it retained over 97.7 % of its initial performance after 100 h of stability testing. The results indicate that V<sub>Zn</sub>-Co@Cu<sub>2</sub>S holds significant potential for industrial applications and provide valuable insights into the design and development of high-performance OER catalysts.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135487"},"PeriodicalIF":6.7,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2025-04-25DOI: 10.1016/j.fuel.2025.135383
Baichao Li , Jiabei Shao , Shiying Li , Qi Li , Pengcheng Feng , Zhangfeng Qin , Jianguo Wang , Weibin Fan , Mei Dong
{"title":"Study on a novel Zn-containing HZSM-5 catalyst for ethylene aromatization","authors":"Baichao Li , Jiabei Shao , Shiying Li , Qi Li , Pengcheng Feng , Zhangfeng Qin , Jianguo Wang , Weibin Fan , Mei Dong","doi":"10.1016/j.fuel.2025.135383","DOIUrl":"10.1016/j.fuel.2025.135383","url":null,"abstract":"<div><div>The Zn-modified HZSM-5 catalyst has been predominantly utilized in the aromatization reaction of light olefins, a crucial step in the conversion of coal-based methanol to aromatics (MTA). Nonetheless, the catalyst encounters a challenge wherein Zn species undergo migration, transformation, and subsequent loss, ultimately resulting in irreversible deactivation. To address this concern, we have developed a stable catalyst, ZnAl<sub>1.5</sub>O/HZSM-5, which incorporates both spinel-structured ZnAl<sub>2</sub>O<sub>4</sub> and ZnO species in HZSM-5 zeolite. The results demonstrate that the ZnAl<sub>1.5</sub>O/HZSM-5 catalyst, with ZnO content of 0.69 wt.%, exhibits exceptional catalytic performance characterized by a significantly higher aromatization selectivity of 67.8 %, remarkable stability spanning 174.5 h, and a substantially lower Zn loss rate of 0.15 wt.%/h, when compared to other Zn-based catalysts. Despite the absence of aromatization catalytic activity in the pure spinel sample (ZnAl<sub>2</sub>O<sub>4</sub>-pure), it effectively aids in improving the dispersion of ZnO and facilitates reversible migration, which promotes ethylene aromatization (ETA) and enhances catalytic stability. Furthermore, the migration and capture mechanisms of Zn on the ZnAl<sub>1.5</sub>O/HZSM-5 catalyst are also discussed.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135383"},"PeriodicalIF":6.7,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2025-04-25DOI: 10.1016/j.fuel.2025.135463
T.N. Koltunowicz , K. Kierczynski , P. Rogalski , P. Okal , B. Pahlavanpour , C. Wolmarans , R. Pajak , M. Zenker , M. Szrot , P. Molenda , S. Borucki , M. Kunicki , M. Opielak , P. Zukowski
{"title":"Measurements of mechanical, thermal and electrical parameters for insulating bio-oils used in the power industry","authors":"T.N. Koltunowicz , K. Kierczynski , P. Rogalski , P. Okal , B. Pahlavanpour , C. Wolmarans , R. Pajak , M. Zenker , M. Szrot , P. Molenda , S. Borucki , M. Kunicki , M. Opielak , P. Zukowski","doi":"10.1016/j.fuel.2025.135463","DOIUrl":"10.1016/j.fuel.2025.135463","url":null,"abstract":"<div><div>This article presents results of research and analysis of several measurement methods for determination of electrical, thermal and mechanical parameters of different type of insulation liquids. The main goal of the study is to present procedure that allows the use of the commonly known methods for the analysis of key parameters of new alternative bio-oils. Two scenarios based on different insulation liquids are investigated and compared: petroleum-based insulating oil and NYTRO® BIO 300X insulating bio-oil. It was established that the kinematic viscosity of bio-oil is about twice as low as for petroleum-based mineral oils in the operating temperature area of the insulation. Frequency-temperature dependences of tanδ, permittivity and loss factor of bio-oil impregnated pressboard are determined. According to the results, the use of loss factor to determine moisture content in cellulose impregnated by bio-oil is not optimal. Finally, it is confirmed that in this case optimal measurement method should be based on DC conductivity, AC conductivity and permittivity as input parameters.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135463"},"PeriodicalIF":6.7,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2025-04-25DOI: 10.1016/j.fuel.2025.135477
Hadi Bagherzadeh, Hassan Hassanzadeh
{"title":"Promising prospects of thermal partial upgrading in reducing diluent requirements for bitumen transportation","authors":"Hadi Bagherzadeh, Hassan Hassanzadeh","doi":"10.1016/j.fuel.2025.135477","DOIUrl":"10.1016/j.fuel.2025.135477","url":null,"abstract":"<div><div>Diluent addition and partial upgrading are two distinct techniques aimed at reducing the viscosity of bitumen and enhancing its transportability to refineries. Nevertheless, each method has its own limitations. A practical solution to overcome these challenges, which constitutes the primary objective of this research, is to integrate thermal partial upgrading with diluent addition. The first step of the study entailed thermal partial upgrading of bitumen at 420 °C with no residence time at target temperature. The process notably reduced bitumen viscosity from 169,000 cSt to 752 cSt at 21 °C with minimal coke formation of only 0.03 wt% and gas production of 2.16 wt%. Analysis of the bitumen and upgraded oil compositions revealed that around 20 % of the vacuum residue fraction in the bitumen was converted into the light cut fraction during the upgrading process. Additionally, the total acid number (TAN) decreased from 2.5 to 1.09 mg KOH/g. Asphaltene contents decreased by approximately 3 %, while nitrogen and sulfur contents reduced by around 35 % and 15 %, respectively. However, the olefin content in the upgraded oil (1.89 wt%) slightly exceeded the limit allowed for pipeline transportation (1.0 wt%). In the subsequent step, diluent was added to the partially upgraded oil to meet the viscosity requirements, and the solvent needed for feed bitumen was quantified. The thermal partial upgrading reduced the need for diluent from approximately 33 vol% to 9 vol%. Eventually, acid-catalyzed hydration was suggested as a potential technique for reducing the olefin levels to address the issue of high olefin content. As olefins generated through thermal cracking tend to accumulate in lower boiling fractions such as naphtha (boiling point ≤ 175 °C), acid-catalyzed hydration was examined on a naphtha sample obtained from a thermal partial upgrading process. The proposed approach in this study holds promise for enhancing bitumen processing capacity through no residence time at target temperature while diminishing the need for diluent.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135477"},"PeriodicalIF":6.7,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2025-04-25DOI: 10.1016/j.fuel.2025.135437
Zhiliang Ou , Qingsong Zuo , Ziqiang He , Kai Wang , Wenpin Zhang , Xiuquan Li , Jing Liang , Ying Chen , Jingyu Ran
{"title":"Comparative DFT study on the reaction mechanism of dry reforming of methane over Ni (111), Ni@Co (111) and Co (111) surface","authors":"Zhiliang Ou , Qingsong Zuo , Ziqiang He , Kai Wang , Wenpin Zhang , Xiuquan Li , Jing Liang , Ying Chen , Jingyu Ran","doi":"10.1016/j.fuel.2025.135437","DOIUrl":"10.1016/j.fuel.2025.135437","url":null,"abstract":"<div><div>Ni-Co bimetal is a considerably promising catalyst to apply in DRM process, and the unique Ni@Co core–shell structure maybe improve the activity and stability, but the reaction pathways and underlying mechanism on Ni@Co surface at the micro level need to be further uncovered. In current work, the adsorption of intermediates and the elementary reactions were systematically investigated based on Density Functional Theory calculations, and reason for Ni@Co core–shell structure enhancing the catalytic performance was obtained by comparing the related energies on Ni (111), Ni@Co (111) and Co (111) surface. Results suggested that CH<sub>4</sub> dehydrogenation is the rate-determining step for CH<sub>4</sub> activation, and the activation energy barrier is 1.43 eV on Ni@Co (111) surface, higher than 1.27 eV on Ni (111) and 1.31 eV on Co (111) surface. Compared with pure Ni and Co catalyst, Ni@Co core–shell catalyst could reduce the carbon formation by inhibiting the CH<sub>4</sub> dissociation into C. Moreover, CO<sub>2</sub> direct dissociation is dominating path for CO<sub>2</sub> activation process. The activation energy barrier is 0.56 eV on Ni (111) surface, and it is further decreased to 0.36 eV on Co (111) surface and 0.22 eV on Ni@Co (111) surface. Ni@Co core–shell structure could promote the CO<sub>2</sub> activation to produce more oxygen species to the oxidize CH and C. Moreover, Ni@Co core–shell structure is also contribute to the elimination of carbon deposited by promote C oxidation and hydrogenation. Furthermore, Ni@Co core–shell structure could also reduce the activation energy barrier of CO and H<sub>2</sub> formation, and increase the activation energy barrier of H<sub>2</sub>O formation, which could suppress the generation of by-products and improve the selectivity of target products.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135437"},"PeriodicalIF":6.7,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2025-04-25DOI: 10.1016/j.fuel.2025.135381
Khadija-Tul-Kubra , Faiqa Noreen , Ali Junaid , Atif Nazir , Sehrish Arshad , Komal Bibi , Ayesha Batool , Aleeza Sattar , Aboud Ahmed Awadh Bahajjaj , Sohail Ahmad , Muhammad Shuaib Khand , Syed Imran Abbas Shah
{"title":"An effective bi-functional electrocatalyst for electrochemical water splitting using NiCo2O4 nanoparticles decorated with Polypyrrole nanocomposite","authors":"Khadija-Tul-Kubra , Faiqa Noreen , Ali Junaid , Atif Nazir , Sehrish Arshad , Komal Bibi , Ayesha Batool , Aleeza Sattar , Aboud Ahmed Awadh Bahajjaj , Sohail Ahmad , Muhammad Shuaib Khand , Syed Imran Abbas Shah","doi":"10.1016/j.fuel.2025.135381","DOIUrl":"10.1016/j.fuel.2025.135381","url":null,"abstract":"<div><div>The use of an efficient electrocatalyst to split water into H<sub>2</sub> and O<sub>2</sub> is crucial. Metal nanocomposites were combined with conducting polymers, specifically Polypyrrole, to provide materials for the electrodes used in the hydrogen evolution and oxygen evolution reactions (HER and OER). In this research, we used a hydrothermal technique to create a pure NiCo<sub>2</sub>O<sub>4</sub>@PPy nanocomposite. The grown samples were examined using several analytical methods. The XRD pattern of the synthesized products showed a crystalline NiCo<sub>2</sub>O<sub>4</sub> Cubic phase. The vibrations of the metal–oxygen and pyrrole bonds were shown in the FTIR pattern. Using a NiCo<sub>2</sub>O<sub>4</sub>@PPy electrode in an alkaline medium for electrocatalysis demonstrates low overpotentials of 203 and 109 mV, correspondingly, for oxygen evolution reactions (OER) and hydrogen evolution reactions (HER), at a benchmark current density of 10 mA cm<sup>−2</sup>. The NiCo<sub>2</sub>O<sub>4</sub>@PPy nanocomposite shows increased electrocatalytic efficiency and reaction kinetics, as indicated by its short Tafel values of 46 mV dec<sup>-1</sup> for HER and 6–4 mVdec<sup>-1</sup> for OER. When related to NiCo<sub>2</sub>O<sub>4</sub> and PPy alone, the TOF and electronic conductivity values of the NiCo<sub>2</sub>O<sub>4</sub>@PPy nanocomposite are significantly greater. Testing the nanocomposite stability over 50 h reveals minimal current loss, attesting to its exceptional stability; furthermore, it exhibits a high electrocatalytic active surface area of 1050 cm<sup>2</sup>.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135381"},"PeriodicalIF":6.7,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2025-04-25DOI: 10.1016/j.fuel.2025.135444
Kazem Lakzian, Horng-Jang Liaw
{"title":"Evaluation criteria for predicting flash point behavior of binary miscible mixtures using extreme flash point behavior indicators for fuel and safety applications","authors":"Kazem Lakzian, Horng-Jang Liaw","doi":"10.1016/j.fuel.2025.135444","DOIUrl":"10.1016/j.fuel.2025.135444","url":null,"abstract":"<div><div>Flash point (FP) behavior of ignitable mixtures is critical in various sectors that utilize these materials, particularly when extreme FP behavior (Maximum or Minimum FP Behavior: MaxFPB or MinFPB) is observed in such mixtures. Therefore, understanding the FP behavior of binary mixtures, as the simplest building blocks of complex mixtures, is essential for enhancing safety in industry that store, transport, or process ignitable materials, as well as in fuel design. This study focuses on validating of the criteria for predicting FP behavior in binary solutions, as proposed in previous studies, utilizing Extreme Flash Point Behavior Indicators (EFPBIs). The validation of the criteria was performed using experimental FP data of 226 binary miscible mixtures reported in prior studies. The results demonstrate that EFPBIs can accurately predict the FP behavior of binary flammable mixtures. In this validation process, it was found that the sufficient condition for exhibiting MaxFPB/MinFPB can be modified to necessary and sufficient condition; moreover, the necessary condition not to show extreme FP behavior can also be modified to a necessary and sufficient condition based on the observed FP behaviors of 226 miscible mixtures. This method not only facilitates the swift and cost-effective prediction of FP behavior in unknown binary ignitable mixtures but also plays a crucial role in mitigating hazards associated with handling of flammable substances. Among the 226 validated blends, 33 were combinations of methyl/ethyl/propyl/butyl/isoamyl esters with alcohols/alkanes, and 40 were ester-to-ester mixtures. These blends are fundamental in biofuel design, and the approach in this study can support this application.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135444"},"PeriodicalIF":6.7,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2025-04-25DOI: 10.1016/j.fuel.2025.135442
Wenjun Zhou , Zhi-Min Wang , Zhen-Yu Tian
{"title":"Insight into pyrolysis mechanism of p-aminophenol crystal based on thermogravimetric analysis and ReaxFF molecular dynamics","authors":"Wenjun Zhou , Zhi-Min Wang , Zhen-Yu Tian","doi":"10.1016/j.fuel.2025.135442","DOIUrl":"10.1016/j.fuel.2025.135442","url":null,"abstract":"<div><div>Antioxidant additives is used for aviation fuel to inhibit oxidative deposition during long-term storage. As a highly reactive additive with difunctional groups, the high-temperature cracking reaction mechanism of p-aminophenol is worthy of clarification. This work studies the pyrolysis kinetics of p-aminophenol based on thermogravimetric analysis and reveals the detail of phase and chemical transfer at the atomic level by heating simulations of ReaxFF MD. Furtherly, following multiple temperature points by isothermal simulation magnifies and observes the crystal cracking reaction mechanism. It reveals the pyrolysis kinetic mechanism that the consumption of p-aminophenol forms a gradually shrinking core with a process from disordered collision to ordered decomposition in endothermic reaction. The high temperature of the phase transition process was triggered by weaken the interaction of structural rings, and increases the collision frequency caused by the of volatile compounds. The dehydrogenation of the difunctional groups NH<sub>2</sub> and OH was the most important initial cracking pathway for p-aminophenol. Thereby hydrogen radicals initiate a chain reaction of functional group dissociation. Increasing temperature performs the selectivity for the cracking, which is a key factor in the substitution of amino dehydrogenation by amino dissociation during the cracking process. It also effects the formation pathway of polycyclic aromatic hydrocarbons. In this work, the high-temperature cracking mechanism of antioxidant additives component p-aminophenol is explored through experimental and simulation methods, which provides a theoretical support for the safe aviation fuel.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135442"},"PeriodicalIF":6.7,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}