Journal of Analytical and Applied Pyrolysis最新文献_第2页

In-situ metal (Fe/Cu) doping for catalytic hydrothermal liquefaction of Tetra Pak waste for bio-oil production 原位金属（Fe/Cu）掺杂用于利乐废液催化水热液化生产生物油

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-09-24 DOI: 10.1016/j.jaap.2025.107403

Ayush Dave, Sivamohan N. Reddy

{"title":"In-situ metal (Fe/Cu) doping for catalytic hydrothermal liquefaction of Tetra Pak waste for bio-oil production","authors":"Ayush Dave, Sivamohan N. Reddy","doi":"10.1016/j.jaap.2025.107403","DOIUrl":"10.1016/j.jaap.2025.107403","url":null,"abstract":"<div><div>The rapid accumulation of Tetra Pak waste (TPW), a complex multilayered packaging material, presents a significant environmental challenge due to its non-biodegradable nature and low recyclability. This study introduces a novel catalytic approach to hydrothermal liquefaction, enabling the simultaneous valorization of TPW into high-yield bio-oil and metallic carbon nanocomposites (MCN) using Fe and Cu metal effluents as liquefaction media. The influence of key process parameters such as temperature (280–340 °C), residence time (10–40 min), and metal effluent concentration (0.05–0.3 wt%) on the catalytic liquefaction of TPW was extensively investigated. Optimal total bio-oil yields of 53.20 wt% and 55.85 wt% were achieved with Fe and Cu effluents, respectively, at 320 °C, 30 min, and 0.2 wt% metal effluent concentration. In addition to the operating parameters, the improved performance is attributed to the in situ carbothermal reduction of metal ions (Fe<sup>+3</sup>/Fe<sup>+2</sup> and Cu<sup>+2</sup>/Cu<sup>+1</sup>) to their zero-valent states, as confirmed by XRD analysis, which facilitated feedstock depolymerization and suppressed repolymerization. GC-MS and NMR characterization of oil fractions revealed a diverse array of compounds, including alcohols, ethers, phenols, ketones, furans, and hydrocarbons, indicating enhanced fuel quality. This integrated catalytic hydrothermal liquefaction-based valorization approach offers a sustainable pathway for managing post-consumer TPW while simultaneously generating energy-rich biofuels and value-added materials.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"193 ","pages":"Article 107403"},"PeriodicalIF":6.2,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154981","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}

引用次数: 0

Bioenergy potential appraisal of melon seed shells via catalytic pyrolysis over V/W-ZSM-5: Product analysis, thermokinetics and DFT study V/W-ZSM-5催化热解瓜子壳生物能源潜力评价：产物分析、热动力学和DFT研究

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-09-24 DOI: 10.1016/j.jaap.2025.107399

Yingna Li , Muhammad Sajjad Ahmad , Pei Gao , Yu Zhang , Mingtao Yang , Xiaolan Zhao , Boxiong Shen

{"title":"Bioenergy potential appraisal of melon seed shells via catalytic pyrolysis over V/W-ZSM-5: Product analysis, thermokinetics and DFT study","authors":"Yingna Li , Muhammad Sajjad Ahmad , Pei Gao , Yu Zhang , Mingtao Yang , Xiaolan Zhao , Boxiong Shen","doi":"10.1016/j.jaap.2025.107399","DOIUrl":"10.1016/j.jaap.2025.107399","url":null,"abstract":"<div><div>This study examined the catalytic pyrolysis of melon seed shell (MSS) using vanadium tungsten modified ZSM-5 (V/W-ZSM-5) through combined experimental and theoretical methods. Thermogravimetric analysis (TGA) with model-free kinetics revealed that the catalyst lowered the activation energy by about 10 % (184–194 kJ mol⁻¹) compared with non-catalytic pyrolysis. Thermodynamic assessment showed reduced entropy (ΔS) values for conversion fractions below 0.7, indicating a more ordered and energy-efficient pathway. Product distribution from Py-GC/MS confirmed enhanced selectivity, with levoglucosan and furfural yields increasing nearly 5-folds and 3-folds, respectively. Density functional theory (DFT) clarified the mechanistic pathways: levoglucosan formed primarily via glucose dehydration, while furfural production followed xylose ring-opening and nucleophilic conversion. Collectively, these findings demonstrate that V/W-ZSM-5 not only improves selectivity toward high-value products but also reduces both kinetic and thermodynamic barriers, highlighting its potential for sustainable biomass valorization.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"193 ","pages":"Article 107399"},"PeriodicalIF":6.2,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154978","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}

引用次数: 0

Co-pyrolysis of pine sawdust and polyolefin with solid heat carrier: Synergistic deoxygenation and high-yield hydrocarbon production in rotary kiln 松木木屑与聚烯烃固体热载体共热解：回转窑协同脱氧及高产烃生产

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-09-24 DOI: 10.1016/j.jaap.2025.107400

Xutao Sheng , Yutao Zhang , Haibo Zhang , Lei Wang , Zhongqing Ma , Guozhao Ji , Yukun Peng , Chengyu Zhang , Jiaqing Ji

{"title":"Co-pyrolysis of pine sawdust and polyolefin with solid heat carrier: Synergistic deoxygenation and high-yield hydrocarbon production in rotary kiln","authors":"Xutao Sheng , Yutao Zhang , Haibo Zhang , Lei Wang , Zhongqing Ma , Guozhao Ji , Yukun Peng , Chengyu Zhang , Jiaqing Ji","doi":"10.1016/j.jaap.2025.107400","DOIUrl":"10.1016/j.jaap.2025.107400","url":null,"abstract":"<div><div>The global depletion of fossil fuels necessitates the efficient valorization of biomass and plastic wastes. This study investigates the co-pyrolysis of pine sawdust (PS) with polyolefins (polyethylene, PE; polypropylene, PP) using a solid heat carrier in a rotary kiln to intensify bio-oil production. Thermal degradation behaviours and kinetic analyses revealed significant synergistic interactions: molten polyolefins permeated the biomass matrix, facilitating hydrogen radical transfer that suppressed oxygenated compounds (e.g., phenolics, furans) and enhanced hydrocarbon formation. Optimized pyrolysis with solid heat carrier parameters (570 °C, 8 % filling ratio, 0.45 mm particle size) maximized bio-oil yield (43.1 wt%) from PS. Co-pyrolysis with PE or PP at a 1:2 ratio further increased the bio-oil yield to 53.3 wt%, while reducing oxygenated compounds by over 70 % and significantly enriching aliphatic hydrocarbons (81.2 % with PE; 78.4 % with PP). The effective hydrogen-to-carbon ratio governed hydrocarbon selectivity, yielding 30.7-32.4% (C<sub>8</sub>–C<sub>23</sub>) alkanes suitable for jet/diesel fuels. The gas calorific value surged to 31.6 MJ/m³ due to the synergistic generation of C₂–C₄ hydrocarbons (45.2 vol%). The process intensification, primarily driven by enhanced heat transfer and hydrogen-donor plasticity of polyolefins, establishes a foundational platform for subsequent studies on <em>in-situ</em> catalytic co-pyrolysis using functionalized solid heat carriers. This work validates co-pyrolysis with a solid heat carrier as a technically viable route for producing high-value bio-oil from biomass and plastic wastes.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"193 ","pages":"Article 107400"},"PeriodicalIF":6.2,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154980","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}

引用次数: 0

Upgrading of biomass by bamboo vinegar-assisted wet torrefaction pretreatment for the highly production of bio-aromatics through catalytic fast pyrolysis 竹材醋辅助湿法焙烧预处理生物质升级，催化快速热解高产生物芳烃

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-09-24 DOI: 10.1016/j.jaap.2025.107404

Wei Cai , Liang Zhu , Sheng Xia , Chuang Xing , Kaige Wang , Zejun Luo , Zhongqing Ma

{"title":"Upgrading of biomass by bamboo vinegar-assisted wet torrefaction pretreatment for the highly production of bio-aromatics through catalytic fast pyrolysis","authors":"Wei Cai , Liang Zhu , Sheng Xia , Chuang Xing , Kaige Wang , Zejun Luo , Zhongqing Ma","doi":"10.1016/j.jaap.2025.107404","DOIUrl":"10.1016/j.jaap.2025.107404","url":null,"abstract":"<div><div>Bamboo vinegar (BV), as the waste liquid by-product during the bamboo carbonization process, was employed as the reaction solution during biomass wet torrefaction pretreatment (WTP) to upgrade the quality of poplar wood (PW) in terms of the deoxygenation and demineralization. Then, the catalytic fast pyrolysis (CFP) was carried out on torrefied PW to produce the value-added bio-aromatics using the Zn modified hierarchical HZSM-5. Results showed that the higher WTP temperature was favored for the synergistic deoxygenation and demineralization of PW with the maximum deoxygenation and demineralization rates of 48.68 % for O, 94.96 % for Na, 97.68 % for K, 77.45 % for Mg, and 82.73 % for Ca at 260 ºC. In addition, the model organic components (e.g., acetic acid and phenol) in BV had synergistic effect on promoting the demineralization rate, among which the acetic acid model component was the most effective one. During CFP, the parent HZSM-5 was modified by the different alkali treatments (NaOH, Na<sub>2</sub>CO<sub>3</sub>, and TPAOH (tetrapropylammonium hydroxide)) and the different loading amounts (1 <sub>wt.</sub>% to 7 <sub>wt.</sub>%) of Zn. It was found that the NaOH desilication treatment coupled with Zn loading amount of 3 % was the best combination to produce the highest yield of aromatics due to the suitable pore size and acidity. Furthermore, the mild BV-assisted WTP condition at 180 ºC coupled with CFP at 800 ºC with the catalyst-to-torrefied PW at 3:1 was the optimal condition for production of bio-aromatics with 34.32 %.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"193 ","pages":"Article 107404"},"PeriodicalIF":6.2,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216948","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}

引用次数: 0

Biochar production, yield and quality characterization from different feedstocks and kilns 不同原料和窑炉的生物炭生产、产量和质量表征

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-09-24 DOI: 10.1016/j.jaap.2025.107401

Atta Kena Sarpong , Francis Kumi , Patrick Ofori-Manfo , Divine Damertey Sewu , Vincent Agyemang Opoku , Mandela Toku , Kwame Agyei Frimpong

{"title":"Biochar production, yield and quality characterization from different feedstocks and kilns","authors":"Atta Kena Sarpong , Francis Kumi , Patrick Ofori-Manfo , Divine Damertey Sewu , Vincent Agyemang Opoku , Mandela Toku , Kwame Agyei Frimpong","doi":"10.1016/j.jaap.2025.107401","DOIUrl":"10.1016/j.jaap.2025.107401","url":null,"abstract":"<div><div>Pyrolysis conditions and feedstock have been highlighted as key indicators for biochar (BC) utility in various fields. Consequently, this study investigated the effect of feedstock type [corn cob (CC), coconut husk (CCH), and empty fruit bunch (EFB)] and kiln type (Elsa barrel and a top-lit updraft (TLUD) kiln) on BC pyrolysis conditions, yield, and characterisation produced under slow pyrolysis. Key parameters such as pH, electrical conductivity (EC), total nitrogen (TN), organic carbon (OC), and fixed carbon (FC) were determined. SEM-EDX, XRD, and FTIR were used to characterise BC quality. Results showed a respective 4 % and 30 % increment in pyrolysis temperature of CC-BC compared to EFB-BC when Elsa barrel and TLUD kilns were employed. Consequently, BC yield was, respectively, 71 % and 49 % higher for EFB on Elsa barrel and the TLUD kiln when compared with CC. Utilising the Elsa barrel, EFB-BC recorded an 11 % higher burn rate than with CC-BC feedstock, whereas a 70 % higher burn rate was observed for EFB-BC relative to CC-BC when the pyrolysis was done with the TLUD kiln. A similar trend was observed for the residence time. CC-BC in the Elsa barrel recorded 1.7 % higher pH, 4.8 % increase in EC, 16.8 % increase in TN, and 4.2 % higher FC compared to CC-BC in the TLUD kiln. SEM analysis indicated that BC from the Elsa barrel had more uniform and porous structures. The findings provide valuable insights into optimising BC production processes for sustainable agricultural and environmental applications.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"193 ","pages":"Article 107401"},"PeriodicalIF":6.2,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154977","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}

引用次数: 0

Integrated biomass catalytic pyrolysis with multi-source waste collaborative treatment: A mini-review 生物质催化热解与多源垃圾协同处理：综述

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-09-22 DOI: 10.1016/j.jaap.2025.107397

Chenguang Zhang , Xiaofei Xu , Xiaobo Chen , Shaoqing Wang , Yuan Zhang , Zhen Wan , Zhihe Li , Weiming Yi

{"title":"Integrated biomass catalytic pyrolysis with multi-source waste collaborative treatment: A mini-review","authors":"Chenguang Zhang , Xiaofei Xu , Xiaobo Chen , Shaoqing Wang , Yuan Zhang , Zhen Wan , Zhihe Li , Weiming Yi","doi":"10.1016/j.jaap.2025.107397","DOIUrl":"10.1016/j.jaap.2025.107397","url":null,"abstract":"<div><div>Biomass, a renewable carbon-containing resource, offers a promising avenue for the efficient production of green energy, chemicals, and carbon materials through catalytic pyrolysis. However, current limitations include low conversion efficiency and product selectivity towards the target products. Currently, industrial agglomeration zones are increasingly challenged by the need for sustainable and centralized multi-source waste disposal. Consequently, creating an integrated system comprising biomass catalytic pyrolysis and multi-source waste treatment for treating complex waste mixtures offers a significant opportunity to advance the innovation of biomass catalytic pyrolysis technology and facilitate the establishment of waste-free industrial agglomeration parks. This review examines the latest aspects of biomass characteristics, catalytic pyrolysis mechanisms, integration with diverse waste streams (agricultural production process waste, petrochemical industry waste, alumina industrial waste, and biological refining industry waste), and applications of catalytic pyrolysis products. Based on the above analysis of scientific literature, an integrated zero-waste industrial agglomeration areas model combining biomass catalytic pyrolysis with collaborative treatment of multiple waste sources to generate renewable energy and achieve sustainable waste management was proposed. To guide future research, it also outlines the emerging trends in the integrated technology of biomass catalytic pyrolysis and multi-source waste treatment. This review can provide scientific support and reference for establishing efficient multi-source waste treatment strategies integrated with biomass catalytic pyrolysis technology.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"193 ","pages":"Article 107397"},"PeriodicalIF":6.2,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118474","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}

引用次数: 0

Minireview on tobacco classification technologies: A vital bridge linking raw leaf properties with end product quality 烟草分类技术综述：连接原叶特性与最终产品质量的重要桥梁

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-09-22 DOI: 10.1016/j.jaap.2025.107398

Qiao-Ling Li , Lei Ju , Lu Zeng , Zhong-Li Ye , Hui Liang , Ting Fei , Guo-Hua Cai , Yan Lin , Wei Deng , Yi Wang

{"title":"Minireview on tobacco classification technologies: A vital bridge linking raw leaf properties with end product quality","authors":"Qiao-Ling Li , Lei Ju , Lu Zeng , Zhong-Li Ye , Hui Liang , Ting Fei , Guo-Hua Cai , Yan Lin , Wei Deng , Yi Wang","doi":"10.1016/j.jaap.2025.107398","DOIUrl":"10.1016/j.jaap.2025.107398","url":null,"abstract":"<div><div>In the tobacco industry, classification serves as a vital bridge linking the properties of raw tobacco leaves with the quality of end products, playing a key role in ensuring product consistency and enhancing market competitiveness. This review systematically summarizes the latest progress from conventional analytical methods to cutting-edge intelligent systems in tobacco detection and classification. Four critical technological domains are systematically analyzed: (1) For appearance feature recognition, advanced image processing and deep learning technologies have enabled efficient, automated grading; (2) Regarding chemical structure detection, integrating various spectroscopic methods with machine learning has facilitated the precise identification of tobacco components; (3) Thermal reaction analysis coupled with machine learning, captures the distinct heat-release and mass-loss during pyrolysis and combustion, enabling accurate classification of different raw tobacco leaves; (4) The pre- and post-reaction product analysis methods have significantly enhanced both the accuracy and speed of complex component detection. Of particular note is the integration of in-situ hyperspectral detection with machine learning algorithms, which enables real-time, non-destructive classification and identification of tobacco leaves, while simultaneously providing detailed information on their chemical composition, such as nicotine and reducing sugars. The review concludes by forecasting future trends in tobacco classification technology, highlighting that the integration of intelligent, in-situ, and fully automated systems will enhance classification precision, shorten assessment cycles, and contribute to improved standardization in tobacco processing.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"193 ","pages":"Article 107398"},"PeriodicalIF":6.2,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118477","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}

引用次数: 0

Cellulosic cigarette papers: A review of the composition, combustion behavior, and impact on toxicant release in smoke 纤维卷烟纸：成分、燃烧行为和对烟雾中有毒物质释放的影响的综述

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-09-22 DOI: 10.1016/j.jaap.2025.107396

Linli Qin , Junhao Li , Jinsheng Rui , Yanchen Zhu , Hao Ren , Chengwen Zhu , Huamin Zhai

{"title":"Cellulosic cigarette papers: A review of the composition, combustion behavior, and impact on toxicant release in smoke","authors":"Linli Qin , Junhao Li , Jinsheng Rui , Yanchen Zhu , Hao Ren , Chengwen Zhu , Huamin Zhai","doi":"10.1016/j.jaap.2025.107396","DOIUrl":"10.1016/j.jaap.2025.107396","url":null,"abstract":"<div><div>Cigarette paper is a key functional component in tobacco products, impacting combustion and harmful emissions. This review comprehensively evaluates how the key structural characteristics of cigarette paper, including fiber type, filler properties (such as the size and shape of calcium carbonate particles), and chemical additives, affect permeability, thermal decomposition pathways, and combustion efficiency. It also highlights the strong correlation between pore size distribution and gas diffusion capacity (correlation coefficient > 0.9). Around 300 °C, pyrolysis intensifies, forming volatile compounds and char. Chemical additives like potassium citrate can reduce tar release by ∼30 %. Advanced techniques (HPLC, GC/MS, TG-FTIR, and electronic nose technology) enable precise detection of harmful smoke components. Future research focuses on developing new biodegradable materials and additives to reduce harmful emissions while maintaining sensory quality. This review provides a basis for designing reduced-risk cigarettes, aiming to enhance product quality, promote industry sustainability, and safeguard consumer health.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"193 ","pages":"Article 107396"},"PeriodicalIF":6.2,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118476","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}

引用次数: 0

Stearic acid-modified NiFe2O4 nanocatalysts for efficient heavy oil upgrading 硬脂酸改性NiFe2O4纳米催化剂用于重油高效提质

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-09-22 DOI: 10.1016/j.jaap.2025.107395

Yinfeng Xu, Houbin Guo, Hao Shi, Hua Dong

{"title":"Stearic acid-modified NiFe2O4 nanocatalysts for efficient heavy oil upgrading","authors":"Yinfeng Xu, Houbin Guo, Hao Shi, Hua Dong","doi":"10.1016/j.jaap.2025.107395","DOIUrl":"10.1016/j.jaap.2025.107395","url":null,"abstract":"<div><div>This study successfully synthesized a highly dispersible magnetic nanocatalyst (NiFe<sub>2</sub>O<sub>4</sub>@SA) based on stearic acid modification for efficient catalytic upgrading of heavy oil. Through comprehensive characterization methods including SEM, EDS, XRD, XPS, FTIR, TGA, contact angle measurements, dispersion tests, and VSM, the structure, surface properties, thermal stability, dispersion, and strong magnetic properties of the catalyst were investigated. When applied to heavy oil upgrading, this catalyst significantly reduced the viscosity of heavy oil and upgraded heavy oil. The effects of four different upgrading strategies on heavy oil viscosity reduction were evaluated: (1) direct aquathermolysis, (2) aquathermolysis with tetralin as a hydrogen donor, (3) aquathermolysis with only the NiFe<sub>2</sub>O<sub>4</sub>@SA catalyst (without adding hydrogen donor), and (4) aquathermolysis with NiFe<sub>2</sub>O<sub>4</sub>@SA as catalyst and tetralin as hydrogen donor. Comprehensive analyses of the heavy oil before and after upgrading were conducted using viscosity measurement, SARA fractionation, elemental analysis, GC-MS, ¹H NMR, and FT-IR. The results showed that program 4# significantly reduced the viscosity of heavy oil (by 76.6 %) and greatly improved its quality. More importantly, the NiFe<sub>2</sub>O<sub>4</sub>@SA catalyst demonstrated excellent reusability: after multiple cycles of use, heavy oil upgrading efficiency (viscosity reduction) remained stable; elemental analysis results of the upgraded oil after five cycles further confirmed the sustainability of its performance. Crucially, TGA analysis, contact angle measurements after prolonged high-temperature treatment, and VSM testing of the catalyst after recycling indicated that its thermal stability, surface properties, and magnetic property were well preserved, highlighting its outstanding durability. This study provides a new strategy for developing efficient, stable, and recyclable heavy oil upgrading catalysts.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"193 ","pages":"Article 107395"},"PeriodicalIF":6.2,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154979","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}

引用次数: 0

Fe/Mn-modified rapeseed straw biochar for selective removal of Pb2+ and Cd2+ from acid mine drainage: Adsorption performance and mechanism 铁锰改性菜籽秸秆生物炭对酸性矿山废水中Pb2+和Cd2+的选择性去除：吸附性能及机理

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-09-20 DOI: 10.1016/j.jaap.2025.107393

Hai Lin , Xiaoyin Li , Juan He , Xinru Li , Kai Meng , Yingbo Dong

{"title":"Fe/Mn-modified rapeseed straw biochar for selective removal of Pb2+ and Cd2+ from acid mine drainage: Adsorption performance and mechanism","authors":"Hai Lin , Xiaoyin Li , Juan He , Xinru Li , Kai Meng , Yingbo Dong","doi":"10.1016/j.jaap.2025.107393","DOIUrl":"10.1016/j.jaap.2025.107393","url":null,"abstract":"<div><div>Adsorption is an effective method for removing heavy metals from acid mine drainage (AMD), but its efficiency is often limited by the high concentration of sulfate. In this study, a Fe/Mn-modified rapeseed straw biochar (FMBC60) was synthesized by optimizing Fe/Mn ratios and pyrolysis conditions. Under acidic conditions (pH = 4, [SO<sub>4</sub><sup>2-</sup>] = 300 mg/L), FMBC60 achieved removal efficiencies of 98.7 % and 84.6 % for Pb<sup>2+</sup> and Cd<sup>2+</sup> with maximum adsorption capacities of 180.7 and 83.4 mg/g, respectively. At a high sulfate concentration of 1000 mg/L, FMBC60 maintained high metal removal efficiencies. Mechanistic analyses revealed that the adsorption of the heavy metals mainly occurred through surface complexation with Fe/Mn oxides, precipitation of PbCO<sub>3</sub> and CdCO<sub>3</sub>, and cation-π interactions, with Pb<sup>2+</sup> exhibiting superior competitive adsorption capacity. FMBC60 also exhibited excellent recyclability after four cycles. Thus, FMBC60 is a promising adsorption material for acid mine drainage remediation.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"193 ","pages":"Article 107393"},"PeriodicalIF":6.2,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216944","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}

引用次数: 0