Journal of Analytical and Applied Pyrolysis最新文献

英文中文

Impact of water leaching of biomass on the composition of torrefaction condensates

IF 5.8 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-03-15 DOI: 10.1016/j.jaap.2025.107092

Bence Babinszki , Zoltán Sebestyén , Emma Jakab , István Sándor Czirok , Liang Wang , Øyvind Skreiberg , Zsuzsanna Czégény

This work has been carried out to demonstrate the effect of water-leachable biomass components on the liquid product distribution of torrefaction. For the partial removal of the mineral matter, each biomass feedstock was leached with hot water. The original and leached wheat straw, rape straw and black locust wood as non-food agricultural and forestry waste samples were torrefied within the temperature range of 200–300 °C. The composition of the collected torrefaction condensates as liquid products was determined from solution by GC/MS and the compositional differences were evaluated. The analysis of the torrefaction condensates allowed us to reveal the effects of water-soluble inorganic contents on the thermal decomposition processes, the yield, and the compositional changes as a function of the applied temperature. Formation of 5-hydroxymethylfurfural (HMF) was detected from the unleached black locust wood and rape straw samples at as low as 200 °C apparently formed by dehydration of the extractable sugar content. Aromatic compounds derived from lignin were released in a significant amount at and above 225 °C. The formation of these decomposition products was hindered from the water-leached samples below 250 °C. In the cases of leached samples, depolymerization of both cellulose and hemicellulose was favored contrary to fragmentation processes within the temperature range of torrefaction similarly to pyrolysis at higher temperatures. The influence of water-leachable inorganic content was also shown on the formation of lignin decomposition products with different side-groups. Interaction between the organic components of biomass was exemplified by the thermal reaction of the lipid content with the methoxy groups of lignin resulting in the formation of methyl palmitate.

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引用次数: 0

Utilization of co-substrates in municipal sewage sludge co-pyrolysis: Yields and characterization of biochar, bio-oil, and syngas, with economic feasibility analysis

IF 5.8 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-03-13 DOI: 10.1016/j.jaap.2025.107091

Michael A. Biney , Mariusz Z. Gusiatin , Lukáš Trakal , Jaroslav Moško , Michael Pohořelý

Co-pyrolysis has emerged as a pivotal method for processing municipal sewage sludge (MSS), offering the dual benefit of reducing waste volume and generating valuable clean energy products. As the production of MSS continues to rise globally, and the demand for sustainable waste management solutions intensifies, co-pyrolysis represents a promising avenue for the recovery of resources and energy generation. This review presents a comprehensive investigation of the co-pyrolysis of municipal sewage sludge (MSS) with various co-substrates, with a particular focus on the yield and characterization of biochar, bio-oil, and syngas. This study examines the impact of diverse co-substrates, including lignocellulosic biomass (e.g., wood chips, agricultural residues) and non-biomass materials (e.g., plastics, excavated waste), on the quality and quantity of pyrolysis products. The role of co-substrate properties, such as proximate and elemental composition, in optimizing energy recovery and improving product quality is a key focus of this study. Furthermore, this review presents an economic analysis of the co-pyrolysis process, demonstrating the substantial influence of co-substrate selection on the profitability of the operation. The integration of specific co-substrates not only enhances product yields but also improves the economic feasibility of the process, as evidenced by a favourable net present value (NPV). By optimizing feedstock combinations and pyrolysis conditions, the process becomes more marketable and economically viable, offering a competitive alternative to traditional waste disposal methods.

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引用次数: 0

Studies on the changes in the characteristics of co-pyrolysis products of discarded car tires with cotton and polyester textile waste

IF 5.8 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-03-11 DOI: 10.1016/j.jaap.2025.107090

Tadeusz Dziok , Barbora Grycova , Przemysław Grzywacz , Rafał Janus , Mariusz Wądrzyk , Lenka Matejova , Pavel Lestinsky , Marcelina Bury , Piotr Soprych , Katerina Klemencova , Piotr Burmistrz

Efforts are underway in the European Union to reduce waste generation and introduce a circular economy. On 1 January 2025, separate collection of textile waste was introduced. Discarded textiles can be used as fuel, but this solution is limited because the combustion plant must meet technological requirements and emission standards. Another option is the pyrolysis process. It is classified as a recovery method and is ranked higher than the combustion process in the waste management hierarchy. A promising opportunity is the co-pyrolysis of discarded textiles with used car tires in operating plants.

The effect of the addition of cotton and polyester to car tires on the properties of co-pyrolysis products were investigated. The addition of textiles led to a decrease in char yield and a significant decrease in oil yield, along with an increase in the volume of gases released. The yields of by-products in the form of water fraction and deposits increased with the addition of both cotton and polyester. The addition of textiles resulted in an improvement in the quality of chars as fuel (a decrease in the ash and sulfur content and an increase in the calorific value), but the sorption properties deteriorated. Textile addition caused a decrease in the calorific value of the oil, but a decrease in the sulfur content was also observed. The calorific value of the gaseous products also decreased significantly. The benefit of using cotton was the introduction of biogenic carbon into products, which can contribute to reducing carbon dioxide emissions.

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引用次数: 0

Co-pyrolysis of adhesive waste and pine sawdust for resource recovery

IF 5.8 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-03-08 DOI: 10.1016/j.jaap.2025.107089

Cui Quan , Hua Chu , Yuqi Zhou , Tianhua Yang , Heng Gui , Ningbo Gao

The rapid increase in global waste generation, driven by factors like population growth and urbanization, has created significant challenges in waste management. This situation highlights the urgent need for sustainable waste management strategies focused on resource recovery. Concurrently, the rising use of adhesives, linked to improved living standards, has contributed to adhesive waste, complicating transportation and cleaning due to its high viscosity. To address this issue, incorporating biomass into adhesive waste can effectively lower its viscosity, facilitating the management of large amounts of waste. This study explores the viability of co-processing adhesive waste with pine sawdust through pyrolysis under various conditions like temperatures, heating rates, and mixing ratios, analyzing their co-pyrolysis characteristics. The results of this study indicated that temperature influences the composition of pyrolysis oil, favoring the formation of olefins and cycloolefins. Higher heating rates aid in adhesive waste depolymerization, increasing gas production while reducing pyrolysis oil output and enhancing olefin and cycloolefin proportions. Key compounds in the pyrolysis oil including C₇H₈, C₈H₁₀, and C₈H₁₂, exhibit diverse responses to temperature changes, with C₇H₈ decreasing and C₈H₁₀ and C₈H₁₂, initially increasing and then decreasing, suggesting that optimal temperature levels enhance product purity. Moreover, adjusting the pine sawdust content affects the activation energy for pyrolysis, impacting pyrolysis residue and gas generation. An appropriate mixing ratio can enhance adhesive waste pyrolysis and promote the re-polymerization of pyrolysis products. These findings highlight the importance of optimizing co-pyrolysis conditions to boost bio-oil yield and quality, facilitating efficient adhesive waste processing by mitigating viscosity issues.

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引用次数: 0

Enhanced aromatics production via co-pyrolysis of biomass and plastic by Zn modified ZSM-5 catalysts

IF 5.8 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-03-06 DOI: 10.1016/j.jaap.2025.107086

Daoxuan Sun , Laizhi Sun , Dong Han , Lei Chen , Shuangxia Yang , Tianjin Li , Zhiguo Dong , Baofeng Zhao , Meirong Xu , Shue Tian , Xinping Xie , Hongyu Si , Dongliang Hua

The co-pyrolysis of biomass and plastic with Zn/ZSM-5 catalysts were studied to improve the aromatic production. The Zn/ZSM-5 catalysts were synthesized by the impregnation method and characterized by BET, XRD, NH₃-TPD and SEM methods. The effects of Si/Al ratios of ZSM-5, Zn loadings, catalytic temperatures, and mass ratios of feedstock-to-catalyst on the selectivity and composition of aromatics in the liquid products were investigated. It was found that under the optimal conditions of 5 % Zn loading, Si/Al ratio of ZSM-5 of 120, catalytic temperature of 500 ℃, and mass ratio of feedstock-to-catalyst of 1/2, the selectivity of monocyclic aromatics hydrocarbons (MAHs) can reach 86.02 %, and the selectivity of benzene, toluene, ethylbenzene, and xylene (BTEX) can reach 59.10 %. Furthermore, the stability experiments demonstrated that the 5 % Zn/ZSM-5 catalyst maintained the aromatic selectivity of MAHs above 85 % after 10 cycles. The mechanism of co-pyrolysis of biomass and plastic with Zn/ZSM-5 catalysts was also proposed, which indicates that the Zn/ZSM-5 catalyst promoted the formation of aromatics via Diels-Alder and dehydration reactions between furan derived from biomass pyrolysis and alkenes produced from plastic pyrolysis.

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引用次数: 0

Transition-metal-assisted pyrolysis to recover glass fibers from end-of-life wind turbine blades

IF 5.8 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-03-06 DOI: 10.1016/j.jaap.2025.107081

Qiang Lu , Haiwen Ji , Yiye Lu , Jie Yang , Weiwei Chen , Jihong Li , Wei Li , Mingxin Xu

The disposal of end-of-life wind turbine blades (WTBs), typically composed of glass fiber-reinforced epoxy resin thermosetting composites, has become a global environmental challenge. Pyrolysis is an effective method for recycling these WTBs, but the process often leads to significant degradation of recovered fibers due to high pyrolysis temperatures. This study proposed a transition-metal-assisted pyrolysis method to enhance the low-temperature depolymerization of end-of-life WTBs, enabling the recovery of glass fibers with improved mechanical properties. With the assistance of ZrCl₄, the resin decomposition ratio of WTBs at 350 °C increased from 52.13 % to 75.59 %, and the tensile strength of the recovered glass fibers improved by 34.74 %. Characterization studies revealed that Zr^4 + ions accelerated the breakdown of C-O-C bonds within the epoxy resin, promoting its decomposition. Additionally, Zr⁴⁺ ions weakened polycondensation and dehydrogenation reactions during the formation of pyrolysis char, reducing its degree of graphitization and improving its oxidative reactivity, thereby shortening the oxidation duration. Consequently, the diffusion of surface defects in the recovered fibers was suppressed, significantly enhancing their mechanical properties. These findings offer valuable insights into addressing the disposal of end-of-life WTBs while simultaneously recovering glass fibers with excellent mechanical properties, thus supporting their circular utilization.

{"title":"Transition-metal-assisted pyrolysis to recover glass fibers from end-of-life wind turbine blades","authors":"Qiang Lu , Haiwen Ji , Yiye Lu , Jie Yang , Weiwei Chen , Jihong Li , Wei Li , Mingxin Xu","doi":"10.1016/j.jaap.2025.107081","DOIUrl":"10.1016/j.jaap.2025.107081","url":null,"abstract":"<div><div>The disposal of end-of-life wind turbine blades (WTBs), typically composed of glass fiber-reinforced epoxy resin thermosetting composites, has become a global environmental challenge. Pyrolysis is an effective method for recycling these WTBs, but the process often leads to significant degradation of recovered fibers due to high pyrolysis temperatures. This study proposed a transition-metal-assisted pyrolysis method to enhance the low-temperature depolymerization of end-of-life WTBs, enabling the recovery of glass fibers with improved mechanical properties. With the assistance of ZrCl<sub>4</sub>, the resin decomposition ratio of WTBs at 350 °C increased from 52.13 % to 75.59 %, and the tensile strength of the recovered glass fibers improved by 34.74 %. Characterization studies revealed that Zr<sup>4 +</sup> ions accelerated the breakdown of C-O-C bonds within the epoxy resin, promoting its decomposition. Additionally, Zr<sup>4+</sup> ions weakened polycondensation and dehydrogenation reactions during the formation of pyrolysis char, reducing its degree of graphitization and improving its oxidative reactivity, thereby shortening the oxidation duration. Consequently, the diffusion of surface defects in the recovered fibers was suppressed, significantly enhancing their mechanical properties. These findings offer valuable insights into addressing the disposal of end-of-life WTBs while simultaneously recovering glass fibers with excellent mechanical properties, thus supporting their circular utilization.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"189 ","pages":"Article 107081"},"PeriodicalIF":5.8,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563393","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

Corrigendum to “Experimental study on the effects of steam temperature on the pore-fracture evolution of oil shale exposed to the convection heating” [J. Anal. Appl. Pyrolysis 164 (2022), 105533] 对 "蒸汽温度对对流加热油页岩孔隙-断裂演化影响的实验研究 "的更正 [J. Anal. Appl. Pyrolysis 164 (2022), 105533]

IF 5.8 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-03-06 DOI: 10.1016/j.jaap.2025.107087

Lei Wang, Dong Yang, Zhiqin Kang, Jing Zhao, Qiaorong Meng

引用次数: 0

Fast pyrolysis of baked wheat straw catalyzed by Fe-Ni modified composite porous molecular sieves for the preparation of aromatics

IF 5.8 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-03-06 DOI: 10.1016/j.jaap.2025.107088

Huimin Mao, Zhengye Chen, Hong Tian, Shan Cheng, Lei Liu, Yanni Xuan, Yanshan Yin

Wheat straw (WS) baked at 260°C is used as raw material. The HZSM-5 was modified through alkali treatment (NaOH) and metal loading (Ni, Fe), followed by the introduction of MCM-41 layers onto the modified HZSM-5 to synthesize composite pore zeolites. A tubular furnace and Py-GC/MS were used to investigate the effects of different composite pore catalysts on the three-phase products and the distribution of bio-oil components during the catalytic fast pyrolysis(CFP) of WS. The use of 1 %FeAZ@M as a catalyst achieved the highest bio-oil yield (31.31 %). Introducing the micro-meso composite pore zeolite 0.3AZ@M as a catalyst resulted in the highest selectivity of monocyclic aromatic hydrocarbons (MAHs) in the bio-oil from WS CFP (52.12 %), along with a bio-oil yield of 26.50 %. The metal-modified composite pore zeolites exhibit enhanced acidity, which can further enhance the composition distribution in the bio-oil. The use of 1 %NiAZ@M as a catalyst resulted in the highest production of MAHs in the bio-oil from WS of CFP (60.67 %), with a bio-oil yield of 23.27 %. Among the bimetal-modified composite pore zeolites, 1 %Ni1 %FeAZ@M demonstrated the highest selectivity for MAHs, with MAHs in the bio-oil reaching 66.36 %, while the bio-oil yield increased to 28.41 %.

{"title":"Fast pyrolysis of baked wheat straw catalyzed by Fe-Ni modified composite porous molecular sieves for the preparation of aromatics","authors":"Huimin Mao, Zhengye Chen, Hong Tian, Shan Cheng, Lei Liu, Yanni Xuan, Yanshan Yin","doi":"10.1016/j.jaap.2025.107088","DOIUrl":"10.1016/j.jaap.2025.107088","url":null,"abstract":"<div><div>Wheat straw (WS) baked at 260°C is used as raw material. The HZSM-5 was modified through alkali treatment (NaOH) and metal loading (Ni, Fe), followed by the introduction of MCM-41 layers onto the modified HZSM-5 to synthesize composite pore zeolites. A tubular furnace and Py-GC/MS were used to investigate the effects of different composite pore catalysts on the three-phase products and the distribution of bio-oil components during the catalytic fast pyrolysis(CFP) of WS. The use of 1 %FeAZ@M as a catalyst achieved the highest bio-oil yield (31.31 %). Introducing the micro-meso composite pore zeolite 0.3AZ@M as a catalyst resulted in the highest selectivity of monocyclic aromatic hydrocarbons (MAHs) in the bio-oil from WS CFP (52.12 %), along with a bio-oil yield of 26.50 %. The metal-modified composite pore zeolites exhibit enhanced acidity, which can further enhance the composition distribution in the bio-oil. The use of 1 %NiAZ@M as a catalyst resulted in the highest production of MAHs in the bio-oil from WS of CFP (60.67 %), with a bio-oil yield of 23.27 %. Among the bimetal-modified composite pore zeolites, 1 %Ni1 %FeAZ@M demonstrated the highest selectivity for MAHs, with MAHs in the bio-oil reaching 66.36 %, while the bio-oil yield increased to 28.41 %.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"189 ","pages":"Article 107088"},"PeriodicalIF":5.8,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593129","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

Sulfur dioxide extrusion: Exploring the mechanism behind the formation of highly reactive 5-(trifluoromethyl)azafulvenium methide intermediates

IF 5.8 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-03-04 DOI: 10.1016/j.jaap.2025.107085

Diana C. Pinilla Peña , Guadalupe Firpo , Noelia M. Ceballos , Federico J. Velazco , Gloria Patricia Camargo Solorzano , María I. L. Soares , Liliana B. Pierella , Teresa M.V.D. Pinho e Melo , Walter J. Peláez

Pyrolysis reactions of 2,2-dioxo-7-(trifluoromethyl)-1H,3H-pyrrolo[1,2-c]thiazoles are presented. Thermal reactions lead to the formation of noteworthy 5-membered heterocyclic products, whose yields were higher when FVPN2 was performed compared to other synthetic pyrolysis methods, such as microwave-induced pyrolysis (MWIP) or conventional heating (reflux). Trifluoromethyl-substituted pyrroles were obtained via rearrangements of trifluoromethyl-azafulvenium-methide intermediates. The experimental Arrhenius parameters of FVPN2 are presented for the very first time, and the results enable the proposal of three distinct mechanistic pathways for the SO₂ extrusion process occurring at high temperatures. Quantum chemical calculations performed at the DFT level of theory provided a rational explanation for the observed results.

{"title":"Sulfur dioxide extrusion: Exploring the mechanism behind the formation of highly reactive 5-(trifluoromethyl)azafulvenium methide intermediates","authors":"Diana C. Pinilla Peña , Guadalupe Firpo , Noelia M. Ceballos , Federico J. Velazco , Gloria Patricia Camargo Solorzano , María I. L. Soares , Liliana B. Pierella , Teresa M.V.D. Pinho e Melo , Walter J. Peláez","doi":"10.1016/j.jaap.2025.107085","DOIUrl":"10.1016/j.jaap.2025.107085","url":null,"abstract":"<div><div>Pyrolysis reactions of 2,2-dioxo-7-(trifluoromethyl)-1<em>H</em>,3<em>H</em>-pyrrolo[1,2-<em>c</em>]thiazoles are presented. Thermal reactions lead to the formation of noteworthy 5-membered heterocyclic products, whose yields were higher when FVPN2 was performed compared to other synthetic pyrolysis methods, such as microwave-induced pyrolysis (MWIP) or conventional heating (reflux). Trifluoromethyl-substituted pyrroles were obtained via rearrangements of trifluoromethyl-azafulvenium-methide intermediates. The experimental Arrhenius parameters of FVPN2 are presented for the very first time, and the results enable the proposal of three distinct mechanistic pathways for the SO<sub>2</sub> extrusion process occurring at high temperatures. Quantum chemical calculations performed at the DFT level of theory provided a rational explanation for the observed results.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"189 ","pages":"Article 107085"},"PeriodicalIF":5.8,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563394","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

Differences in pyrolysis behaviors of tar-rich coal macerals from various paleosedimentary environments

IF 5.8 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis

Pub Date : 2025-03-04 DOI: 10.1016/j.jaap.2025.107067

Yaya Shi , Qingmin Shi , Shuangming Wang , Chunhao Li , Shidong Cui , Fu Yang , Bingyang Kou

Tar-rich coal, a valuable resource for China's energy security, undergoes the production of tar and gas during pyrolysis. This study combines proximate and ultimate analyses with TGA and in-situ FTIR to investigate the molecular structure of raw coal and its macerals from three coal-forming environments. The results indicate that the paleosedimentary environment significantly affects coal structure, especially the aliphatic and aromatic structures, as well as oxygenated functional groups. Deeper overlying water and more reducing conditions foster the formation of aliphatic structures, which are abundant in vitrinite-rich concentrates and raw coal, whereas inertinite-rich concentrates contain fewer. During pyrolysis, aromatic C-H condensation results in the formation of semi-coke and coke. Raw coal and macerals from deeper, reducing environments decompose more rapidly, accelerating aromatic condensation. Additionally, volatile gases such as H₂, CO, CO₂, CH₄, and tar are generated during pyrolysis. CO and CO₂ mainly originate from the cracking of oxygenated functional groups. Xinjiang raw coal(T1-R(V)), formed under deep overlying water, exhibits intense decomposition due to the high content of oxygenated functional groups in aliphatic side chains. Xiwan coal(T3), from a wet forest swamp environment, has numerous oxygenated groups, leading to higher decomposition rates in raw coal and inertinite-rich concentrates. Aliphatic cracking releases hydrocarbon gases and tar, with faster decomposition occurring in deeper, reducing environments. The thermal decomposition rates of vitrinite-rich concentrates show minimal variation. These findings underscore the influence of coal-forming environments on pyrolysis, facilitating the efficient utilization of tar-rich coal.

{"title":"Differences in pyrolysis behaviors of tar-rich coal macerals from various paleosedimentary environments","authors":"Yaya Shi , Qingmin Shi , Shuangming Wang , Chunhao Li , Shidong Cui , Fu Yang , Bingyang Kou","doi":"10.1016/j.jaap.2025.107067","DOIUrl":"10.1016/j.jaap.2025.107067","url":null,"abstract":"<div><div>Tar-rich coal, a valuable resource for China's energy security, undergoes the production of tar and gas during pyrolysis. This study combines proximate and ultimate analyses with TGA and in-situ FTIR to investigate the molecular structure of raw coal and its macerals from three coal-forming environments. The results indicate that the paleosedimentary environment significantly affects coal structure, especially the aliphatic and aromatic structures, as well as oxygenated functional groups. Deeper overlying water and more reducing conditions foster the formation of aliphatic structures, which are abundant in vitrinite-rich concentrates and raw coal, whereas inertinite-rich concentrates contain fewer. During pyrolysis, aromatic C-H condensation results in the formation of semi-coke and coke. Raw coal and macerals from deeper, reducing environments decompose more rapidly, accelerating aromatic condensation. Additionally, volatile gases such as H₂, CO, CO₂, CH₄, and tar are generated during pyrolysis. CO and CO₂ mainly originate from the cracking of oxygenated functional groups. Xinjiang raw coal(T1-R(V)), formed under deep overlying water, exhibits intense decomposition due to the high content of oxygenated functional groups in aliphatic side chains. Xiwan coal(T3), from a wet forest swamp environment, has numerous oxygenated groups, leading to higher decomposition rates in raw coal and inertinite-rich concentrates. Aliphatic cracking releases hydrocarbon gases and tar, with faster decomposition occurring in deeper, reducing environments. The thermal decomposition rates of vitrinite-rich concentrates show minimal variation. These findings underscore the influence of coal-forming environments on pyrolysis, facilitating the efficient utilization of tar-rich coal.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"189 ","pages":"Article 107067"},"PeriodicalIF":5.8,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549743","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

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