Journal of Analytical and Applied Pyrolysis最新文献_第9页

Catalytic pyrolysis-gasification of contaminated municipal wastes: Catalyst regeneration 污染城市垃圾的催化热解气化：催化剂再生

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2026-03-01 Epub Date: 2025-11-29 DOI: 10.1016/j.jaap.2025.107513

Beatrix Csutorás, Viktória Zsinka, Norbert Miskolczi

{"title":"Catalytic pyrolysis-gasification of contaminated municipal wastes: Catalyst regeneration","authors":"Beatrix Csutorás, Viktória Zsinka, Norbert Miskolczi","doi":"10.1016/j.jaap.2025.107513","DOIUrl":"10.1016/j.jaap.2025.107513","url":null,"abstract":"<div><div>The aim of this work is to investigate the effect of the catalyst regeneration during thermo-catalytic conversion of municipal solid waste and municipal plastic waste by pyrolysis-gasification. Ni/ZSM-5 catalyst was used to affect the product yields and composition for 10 cycles in the pyrolysis-gasification reaction. The Ni/ZSM-5 catalyst was tested without regeneration, however, to investigate the effect of catalyst regeneration, the Ni/ZSM-5 catalyst was also regenerated after each use. The composition of the gas products was analysed by GC-FID and GC-TCD methods, where the concentration of hydrogen, carbon-monoxide, carbon-dioxide, methane and other volatile hydrocarbons had been detected and changes was discussed. Regarding the pyrolysis oil, the single ring and polyaromatic content had been analysed by HPLC. The surface properties and the morphology of the used catalyst was also studied to follow the catalyst deactivation. Based on the results, the BET surface of the used catalyst decreased by 31.0 % through the consecutive repeated applications, when municipal solid waste was utilized and the catalyst was not regenerated. However, it decreased only by 16.2 % when the catalyst was regenerated between the repeated applications. When municipal plastic waste was pyrolyzed, the decrease were 15.3 % and 8.0 %, respectively. In order to compare the main properties and the effects of the regenerated and non-regenerated catalysts during the pyrolysis-gasification process, a comparative analysis was made, while a SWOT analysis was studied on the step of regeneration.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"194 ","pages":"Article 107513"},"PeriodicalIF":6.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145836882","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

Kinetic and mechanism analysis of thermal decomposition of hexafluorobisphenol A-containing polyarylates 含六氟双酚a聚芳酯的热分解动力学及机理分析

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2026-03-01 Epub Date: 2025-11-29 DOI: 10.1016/j.jaap.2025.107512

Xiubo Long , Zhoufeng Wang , Wenlong Yao , Wenchi Zhang , Puxi Zheng

{"title":"Kinetic and mechanism analysis of thermal decomposition of hexafluorobisphenol A-containing polyarylates","authors":"Xiubo Long , Zhoufeng Wang , Wenlong Yao , Wenchi Zhang , Puxi Zheng","doi":"10.1016/j.jaap.2025.107512","DOIUrl":"10.1016/j.jaap.2025.107512","url":null,"abstract":"<div><div>This research thoroughly examined the kinetics of thermal decomposition as well as the pyrolysis mechanism of a fluorinated polyarylate (PBR-F). From thermogravimetric analysis (TG), it was found that PBR-F-50 and PBR-F-80, which had a high content of hexafluorobisphenol A (BPAF), had a three-stage thermal decomposition characteristic, while on the contrary, PBR-F-20, which had a low content of BPAF monomer units, had only one stage. The kinetic assessment of thermal decomposition was conducted using the Friedman, Flymn-Wall-Ozawa (F-W-O), Kissinger-Akahira-Sunose (K-A-S), and integral Master-Plot techniques. Ultimately, the average activation energies for PBR-F-20, PBR-F-80 Stage 1, and PBR-F-80 Stage 2 were found to be 187.35 kJ/mol, 214.27 kJ/mol, and 271.26 kJ/mol, respectively. In addition, the pyrolysis mechanism function for PBR-F-20 and PBR-F-80 Stage 1 was F<sub>1</sub>, while that for PBR-F-80 Stage 2 was R<sub>2</sub>. By analyzing the thermally decomposed gaseous compounds of PBR-F and demonstrated that the polar functional group –CF<sub>3</sub> weakens the stability of the ester group and makes it more susceptible to bond breakage. However, some BPAF segments broke first and absorbed a lot of energy, delaying the breakage of the polymer backbone. The remaining segments were gradually and steadily released from the polymer as the temperature increased, thereby enhancing the thermal stability of PBR-F. Through thermal decomposition kinetics and mechanism analysis, the mechanism of two-stage pyrolysis for a novel fluorinated polyarylate (PBR-F) was revealed.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"194 ","pages":"Article 107512"},"PeriodicalIF":6.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682799","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

Nonlinear evolutionary characteristics and early warning methods of coal spontaneous combustion: Implications for coal mine disaster warning 煤炭自燃的非线性演化特征及预警方法：对煤矿灾害预警的启示

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2026-03-01 Epub Date: 2025-11-25 DOI: 10.1016/j.jaap.2025.107492

Teng Ma , Binbin Ma , Xiaowei Zhai , Bobo Song , Ya-E. Bai , Ling Liu , Haoyu Yang , Weigang Wang , Binbin He , Xiaokun Chen

{"title":"Nonlinear evolutionary characteristics and early warning methods of coal spontaneous combustion: Implications for coal mine disaster warning","authors":"Teng Ma , Binbin Ma , Xiaowei Zhai , Bobo Song , Ya-E. Bai , Ling Liu , Haoyu Yang , Weigang Wang , Binbin He , Xiaokun Chen","doi":"10.1016/j.jaap.2025.107492","DOIUrl":"10.1016/j.jaap.2025.107492","url":null,"abstract":"<div><div>To reveal the dynamic evolution of coal spontaneous combustion (CSC) and develop an efficient warning method, this study analyzes gas release behavior and the evolution of functional groups during CSC utilizing the self-built program controlled temperature rising apparatus and Fourier transform infrared spectroscopy (FTIR). The results indicate that during the slow-oxidation and critical-temperature stages, oxygen consumption and the release of carbon oxygen gases proceed slowly; during the rapid-oxidation stage, hydrocarbon gases begin to form; whereas in the combustion stage, carbon oxygen gas and hydrocarbon gas are released intensely. Based on the nonlinear characteristics of CSC and the results of Pearson correlation analysis, an early warning method is proposed that adopts CO, C<sub>2</sub>H<sub>4</sub>, and Graham coefficient as the main indicators, whereas CO<sub>2</sub>, O<sub>2</sub>, O<sub>2</sub>/(CO+CO<sub>2</sub>), CO/CO<sub>2</sub>, and C<sub>2</sub>H<sub>6</sub> serve as auxiliary indicators. By combining the advantages of particle swarm optimization (PSO) and genetic algorithm (GA), a PSO-GA-BPNN prediction model was developed. The model was trained on 112 samples collected from four Jurassic coal seams in northern Shaanxi, with 80 % used for training and 20 % for testing, achieving an RMSE of 5.6429 and an R<sup>2</sup> of 0.9944, significantly outperforming the other five models. Shapley Additive Explanations (SHAP) analysis was used to quantitatively evaluate the contributions of main and auxiliary indicators to the model predictions, verifying the dominant role of the main indicators in the prediction process. The results provide guidance for safe production and sustainable development of the coal industry, contributing to the achievement of carbon peaking and carbon neutrality goals.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"194 ","pages":"Article 107492"},"PeriodicalIF":6.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682797","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

A strategic approach to treat polyester waste: Co-pyrolysis of PET and PBAT for controlling product characteristics and char graphitization 聚酯废弃物处理的策略途径：PET和PBAT共热解控制产品特性和炭石墨化

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2026-03-01 Epub Date: 2025-12-01 DOI: 10.1016/j.jaap.2025.107527

Seonho Lee , Hansung Lee , Eunhyo Song , Byungmin Ahn , Jechan Lee

{"title":"A strategic approach to treat polyester waste: Co-pyrolysis of PET and PBAT for controlling product characteristics and char graphitization","authors":"Seonho Lee , Hansung Lee , Eunhyo Song , Byungmin Ahn , Jechan Lee","doi":"10.1016/j.jaap.2025.107527","DOIUrl":"10.1016/j.jaap.2025.107527","url":null,"abstract":"<div><div>This study is aimed at demonstrating pyrolytic behavior of co-pyrolysis of polyethylene terephthalate (PET) and polybutylene adipate terephthalate (PBAT) to propose a method to simultaneously treat a mixed non-biodegradable/biodegradable polyester stream. The co-pyrolysis of PET and PBAT is performed at 500–800 °C. The yields of char and liquid pyrolysate (25 and 22.4 wt%, respectively) are highest at 500 °C, while the yield of gas pyrolysate was highest at 800 °C (18 wt%). Char is the major solid product with yields up to 33 % higher under the co-pyrolysis than under single pyrolysis of PBAT at 800 °C. Structural transformations of the PET/PBAT mixture-derived char depend on pyrolysis temperature. Progressive graphitization with increasing temperature is observed by reduced I<sub>D/G</sub> ratios and the appearance of 2D bands. Oxygenated groups (C–O, C<img>O) and formation of C–C or C<img>C bonds are removed with the conversion of PBAT-derived organics, especially at ≥ 700 °C. Micro–mesoporous structures are developed more prominently at higher temperatures. The experimental results should contribute to developing processes achieving the volume reduction of complicated non-biodegradable/biodegradable plastic mixtures and the production of higher quality carbon materials from plastic waste.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"194 ","pages":"Article 107527"},"PeriodicalIF":6.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682794","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

A novel insight on coke quality: A new approach and index for evaluating coke thermal properties under simulated blast furnace condition 焦炭质量的新认识：模拟高炉条件下焦炭热性能评价的新方法和新指标

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2026-03-01 Epub Date: 2025-12-10 DOI: 10.1016/j.jaap.2025.107548

Zhexi Li , Mingxin Wu , Yongqiang Jiang , Tingle Li , Sunny Song , Junchen Huang , Songtao Yang , Qi Wang , Changyu Sun

{"title":"A novel insight on coke quality: A new approach and index for evaluating coke thermal properties under simulated blast furnace condition","authors":"Zhexi Li , Mingxin Wu , Yongqiang Jiang , Tingle Li , Sunny Song , Junchen Huang , Songtao Yang , Qi Wang , Changyu Sun","doi":"10.1016/j.jaap.2025.107548","DOIUrl":"10.1016/j.jaap.2025.107548","url":null,"abstract":"<div><div>Coke thermal properties is a key factor in assessing its quality, directly affecting blast furnace (BF) performance. Currently, NSC(Nippon Steel Corporation) and its derivative method(variable temperature and gas conditions) are most commonly used. However, coke with significantly different CRI and CSR can still perform well in BF operations without negatively impacting efficiency. This raises questions about the accuracy of NSC-based methods. Therefore, there is an urgent need for a more accurate evaluation method. In this study, field coke samples are tested under simulated BF conditions (BFC). The reliability of BFC method was validated by comparing results with BF dissection data, and the limitation of NSC-based method are clarified. Based on these findings, two new evaluation indices CAI and CPI are proposed to better assess coke thermal properties. Regression analysis between the new indices and theoretical coke ratio (K<sub>BFC</sub>) demonstrated their scientific validity and practical feasibility. Key findings include: BFC method accurately reflects coke solution-loss and degradation behavior under real BF conditions, showing strong consistency with BF dissection results. The temperature and gas conditions used in NSC-based methods are limited, leading to overestimation of low CRI/high CSR coke and underestimation of high CRI/low CSR coke in thermal properties. The new indices provide significantly different evaluations compared to CRI and CSR. The correlation coefficients between CAI/CPI and K<sub>BFC</sub> are 0.89 and 0.82, respectively, outperforming the 0.03 and 0.18 obtained by CRI/CSR. BFC method provides a more comprehensive simulation of coke behavior in blast furnace operations, and its derived indexes, CAI and CPI, offer a more accurate assessment of coke thermal properties.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"194 ","pages":"Article 107548"},"PeriodicalIF":6.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145734096","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

Proton acid density in zeolite USY: A key factor for selective ring-opening in 9, 10-dihydrophenanthrene hydrocracking 沸石中质子酸密度：9,10 -二氢菲加氢裂化中选择性开环的关键因素

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2026-03-01 Epub Date: 2025-12-05 DOI: 10.1016/j.jaap.2025.107540

Hanqiong Jia , Wenming Hao , Bo Qin , Yanze Du , Jinghong Ma , Ruifeng Li

{"title":"Proton acid density in zeolite USY: A key factor for selective ring-opening in 9, 10-dihydrophenanthrene hydrocracking","authors":"Hanqiong Jia , Wenming Hao , Bo Qin , Yanze Du , Jinghong Ma , Ruifeng Li","doi":"10.1016/j.jaap.2025.107540","DOIUrl":"10.1016/j.jaap.2025.107540","url":null,"abstract":"<div><div>The conversion of polyaromatic hydrocarbons (PAHs) into benzene, toluene and xylene (BTX) is one of the ways to clean and efficient utilization of fossil fuel. The acid cracking centers of catalyst for catalytic ring-opening reaction of PAHs are widely employed for improving the reaction selectivity and yield. Here, the product pattern and competitive interplay between central and terminal ring opening in 9,10-dihydrophenanthrene (9,10-DHP) hydrocracking are found to be determined by the acid density of USY catalyst. During the initial phase of 9,10-DHP hydrocracking, hydrogenation/dehydrogenation and hydrogen transfer reactions are in competition with the central ring opening (CRO) reaction. The high temperature is in favor of the CRO reaction, while the hydrogenation/dehydrogenation reactions diminish. In a high BAS density range (>179 μmol/g), the selectivity for CRO products notably increases, while the selectivity for tetrahydrophenanthrene declines with the increased density of BAS, the CRO efficiency is over 60 %. The coke deposition is less sensitive when the BAS in the low range (< 179 μmol/g).</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"194 ","pages":"Article 107540"},"PeriodicalIF":6.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145734097","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

Controllable preparation of biomass-derived activated carbon for targeted adsorption of phenolic substances in crude wood vinegar 生物质源活性炭定向吸附粗木醋中酚类物质的可控制备

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2026-03-01 Epub Date: 2025-12-28 DOI: 10.1016/j.jaap.2025.107584

Wenqi Chen , Gang Wu , Yinhai Su , Enhui Sun , Huiyan Zhang

{"title":"Controllable preparation of biomass-derived activated carbon for targeted adsorption of phenolic substances in crude wood vinegar","authors":"Wenqi Chen , Gang Wu , Yinhai Su , Enhui Sun , Huiyan Zhang","doi":"10.1016/j.jaap.2025.107584","DOIUrl":"10.1016/j.jaap.2025.107584","url":null,"abstract":"<div><div>Straw pyrolysis yields wood vinegar and biochar, with wood vinegar holding significant agricultural potential due to growth-promoting components (acids, alcohols, ketones) but suffering from phenol-induced biotoxicity that restricts its application. To address this challenge, this study develops a binary activation strategy for the controllable preparation of straw-derived activated carbon (AC) using ZnCl<sub>2</sub> and H<sub>3</sub>PO<sub>4</sub> as activators, targeting efficient phenol removal from crude wood vinegar. Notably, the AC synthesized through binary impregnation activation using a 0.1 M mixed solution of ZnCl<sub>2</sub> and H<sub>3</sub>PO<sub>4</sub> exhibits an excellent pore structure, abundant oxygen-containing functional groups, and optimal adsorption performance, achieving a phenol removal efficiency of 82.8 % which is significantly higher than those of straw pyrolytic char 3.3 % and single-agent activation 71.8 % for ZnCl<sub>2</sub> and 75.6 % for H<sub>3</sub>PO<sub>4</sub>. Furthermore, the targeted adsorption mechanism of harmful components was elucidated. The Langmuir isotherm model and pseudo-second-order kinetic model better fit the description of the targeted adsorption process of phenol on activated carbon, corresponding to a monolayer homogeneous adsorption process with abundant active sites. This work provides a sustainable approach for high-value utilization of straw waste, offering theoretical and technical insights into the controllable preparation of high-performance AC adsorbents and efficient refinement of crude wood vinegar.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"194 ","pages":"Article 107584"},"PeriodicalIF":6.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880254","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

Catalytic pyrolysis of endogenous nitrogen in feather protein enhances the generation of nitriles and pyrroles in pyrolysis oil: N element migration mechanism 羽毛蛋白中内源氮的催化热解促进了热解油中腈和吡咯的生成：N元素迁移机制

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2026-03-01 Epub Date: 2026-01-05 DOI: 10.1016/j.jaap.2026.107600

Shanjian Liu , Guanshuai Zhang , Jiyan Ma , Qingqing Qian , Chengxizi Zhang , Bin Zhou

{"title":"Catalytic pyrolysis of endogenous nitrogen in feather protein enhances the generation of nitriles and pyrroles in pyrolysis oil: N element migration mechanism","authors":"Shanjian Liu , Guanshuai Zhang , Jiyan Ma , Qingqing Qian , Chengxizi Zhang , Bin Zhou","doi":"10.1016/j.jaap.2026.107600","DOIUrl":"10.1016/j.jaap.2026.107600","url":null,"abstract":"<div><div>The production of high-value-added nitrogenous chemicals through pyrolysis technology is a new approach to realize the utilization of waste poultry feathers. In this research, aiming at the problem of low yield of nitrogenous chemicals obtained by conventional pyrolysis, it is proposed to use four catalysts, namely MCM-41, ZSM-5, ZIF-67 and γ-Al<sub>2</sub>O<sub>3</sub>, for the directional regulation of products during the pyrolysis process. The influence of catalyst types and addition ratios on the distribution of bio-oil components were investigated. The results indicated that MCM-41 and ZIF-67 significantly boosted the generation of nitrogen-containing compounds, especially nitriles and pyrroles. When using MCM-41, the nitrogenous compounds content grew from 66.3 % to a maximum of 81.8 %. Pyrroles increased from 7.7 % to 26.9 %, and that of nitriles rose from 9.9 % to 29.8 %. ZSM-5 and γ-Al<sub>2</sub>O<sub>3</sub> had no significant effect on the generation of nitrogen-containing compounds. Finally, combined with the research findings, the influence mechanism of different types of catalysts on the migration and transformation of nitrogen in feather was analyzed. The results of this research provide a guide for the preparation of highly selective nitrogenous chemicals using feathers as raw materials.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"194 ","pages":"Article 107600"},"PeriodicalIF":6.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145920674","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

Insight into the relationship between carbon structure and coke performance during coal blending coking 配煤炼焦过程中碳结构与焦炭性能关系的探讨

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2026-03-01 Epub Date: 2026-01-05 DOI: 10.1016/j.jaap.2026.107598

Hanwen Zhu , Peng Yu , Xinni Zhao , Lu Tian , Hua Li , Xingxing Chen , Jinxiao Dou , Jianglong Yu

{"title":"Insight into the relationship between carbon structure and coke performance during coal blending coking","authors":"Hanwen Zhu , Peng Yu , Xinni Zhao , Lu Tian , Hua Li , Xingxing Chen , Jinxiao Dou , Jianglong Yu","doi":"10.1016/j.jaap.2026.107598","DOIUrl":"10.1016/j.jaap.2026.107598","url":null,"abstract":"<div><div>To address the increasing scarcity of high-quality coking coal resources and the theoretical need to improve coke quality through optimized coal blending, Hongsheng coking coal (HSCC) and Kunpeng fat coal (KPFC) were selected as primary coals, with Huangling gas coal (HLGC) and Yonghesheng lean coal (YHSLC) as blending coals. By comprehensively utilizing X-ray photoelectron spectroscopy (XPS), solid-state <sup>13</sup>C nuclear magnetic resonance (<sup>13</sup>C NMR), high-resolution transmission electron microscopy (HRTEM), a 10 kg laboratory-scale simulated coke oven, and coke thermal reactivity analysis, the relationship between carbon structures and coke properties in different coal blending systems during the coking process from 600 to 1000°C was systematically investigated. The results showed that coal blending characteristics significantly affect the uniformity of temperature and pressure distribution within the coke oven. An excessively high proportion of gas coal impedes heat transfer toward the center, while an increased proportion of lean coal aggravates temperature non-uniformity due to reduced plasticity. The thermal properties of coke can be directionally regulated by blending. A high proportion of aromatic bridgehead carbon (<em>X</em><sub>b</sub>) and a low degree of aromatic ring substitution (<em>δ</em>) are conducive to increasing coke strength after reaction (CSR). Additionally, a high lattice fringe tortuosity is associated with a high coke reactivity index (CRI). The 9HS1YHS and 8HS2YHS exhibit excellent thermal properties, while 7KP3HL demonstrates a synergistic effect. This multi-scale analysis provides a theoretical basis for optimizing blending ratios and coke quality.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"194 ","pages":"Article 107598"},"PeriodicalIF":6.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145920677","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

Synergistic regulation of lignite thermal conversion and product evolution by carbide slag addition strategies 电石渣添加策略对褐煤热转化和产物演化的协同调控

IF 6.2 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2026-03-01 Epub Date: 2026-01-03 DOI: 10.1016/j.jaap.2026.107595

Lujie Wang , Yunfei Wang , Quansheng Liu , Jianxiu Hao , Na Li , Keduan Zhi , Huacong Zhou , Yanpeng Ban

{"title":"Synergistic regulation of lignite thermal conversion and product evolution by carbide slag addition strategies","authors":"Lujie Wang , Yunfei Wang , Quansheng Liu , Jianxiu Hao , Na Li , Keduan Zhi , Huacong Zhou , Yanpeng Ban","doi":"10.1016/j.jaap.2026.107595","DOIUrl":"10.1016/j.jaap.2026.107595","url":null,"abstract":"<div><div>The utilization of carbide slag (CS) as a calcium-based catalyst in coal gasification and pyrolysis presents significant economic and environmental benefits, enabling efficient conversion of low-rank coals such as lignite while facilitating the valorization of industrial waste. However, the impacts of different CS addition strategies on the thermal conversion behavior of lignite remain poorly understood. The present study addresses this issue by introducing CS as a catalyst in lignite by means of four different treatment methods, including physical mixing, mechanical activation, impregnation, and hydrothermal treatment. The treated samples were subjected to detailed physicochemical characterization, and the main syngas constituents during gasification and the dominant molecular species in pyrolysis tar were systematically analyzed. The results reveal that mechanical activation, impregnation, and hydrothermal treatment exerted pronounced influences on syngas composition, reducing the temperature corresponding to the maximum decomposition rate by 199 °C, 227 °C, and 229 °C, respectively, compared with the untreated lignite. The treatment method also affected the ratio of liquid product yields to gas product yields, where physical mixing and mechanical activation increased this ratio, while impregnation and hydrothermal treatment significantly decreased this ratio. Regarding liquid pyrolysis products, mechanical activation, impregnation, and hydrothermal treatment enhanced the formation of hydrocarbon compounds while reducing the abundance of alcohols, phenols, and ethers. This work provides valuable theoretical insights and practical guidance for optimizing calcium-based catalytic coal conversion, thereby advancing the development of clean and efficient coal utilization technologies.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"194 ","pages":"Article 107595"},"PeriodicalIF":6.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145921190","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