Journal of Analytical and Applied Pyrolysis最新文献_第5页

Effect of pre-oxidation on the rate of formation of sulfur-containing aromatic compounds during vacuum gas oil thermal cracking 预氧化对真空气油热裂解过程中含硫芳香化合物形成速度的影响

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-10-01 DOI: 10.1016/j.jaap.2024.106798

Yulia A. Sviridenko, Nikita N. Sviridenko, Evgenii B. Krivtsov

{"title":"Effect of pre-oxidation on the rate of formation of sulfur-containing aromatic compounds during vacuum gas oil thermal cracking","authors":"Yulia A. Sviridenko, Nikita N. Sviridenko, Evgenii B. Krivtsov","doi":"10.1016/j.jaap.2024.106798","DOIUrl":"10.1016/j.jaap.2024.106798","url":null,"abstract":"<div><div>It was shown that oxidation followed by heat treatment is an effective method for desulfurization of vacuum gas oil. Patterns of changes in the quantitative content of the thiophene series compounds in liquid cracking products of vacuum gas oil and liquid cracking products of pre-oxidized vacuum gas oil are described. A mixture of hydrogen peroxide and formic acid (molar ratio 3:4) was used as the oxidation system. The hypothetical mechanism for the formation of thiophene, benzo- and dibenzothiophene and their homologues from high-molecular weight components of the initial vacuum gas oil and its oxidation products is proposed. Presumably, main path of formation considerate compounds is thermal decomposition of high-molecular weight sulfur-containing components. On the basis of IR spectroscopy and structure-group analysis data, the averaged structures of such components were constructed. The influence of pre-oxidation and its conditions on the value of the rate constants for the formation of thiophene, benzo- and dibenzothiophene and their homologues during thermal cracking of initial and oxidized vacuum gas oils is studied.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106798"},"PeriodicalIF":5.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425736","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 HTPB pyrolysis mechanism under high-temperature: A reactive molecular dynamics study 高温下 HTPB 热解机理的深入研究：反应分子动力学研究

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-10-01 DOI: 10.1016/j.jaap.2024.106789

Jiaqi Tian , Hao Zhu , Ruizhi Li , Guobiao Cai

{"title":"Insight into HTPB pyrolysis mechanism under high-temperature: A reactive molecular dynamics study","authors":"Jiaqi Tian , Hao Zhu , Ruizhi Li , Guobiao Cai","doi":"10.1016/j.jaap.2024.106789","DOIUrl":"10.1016/j.jaap.2024.106789","url":null,"abstract":"<div><div>Hydroxyl-terminated polybutadiene (HTPB) is widely utilized in solid and hybrid rocket propellants due to its mechanical properties and combustion performance. Insight into its pyrolysis process is key to enhancing combustion efficiency in rocket engines. This study employs ReaxFF molecular dynamics (MD) simulations to explore the pyrolysis mechanism of HTPB under extreme conditions, with temperatures ranging from 1000 K to 2000 K. The results identify the primary degradation products and elucidate their formation mechanisms. The simulation reveals that C-C bond cleavage at polymerization sites is the initial step, followed by the formation of linear oligomers and butadiene. Subsequent reactions, including hydrogenation and dehydrogenation, lead to the generation of smaller molecular species. The kinetic analysis confirms that HTPB pyrolysis follows first-order reaction kinetics, with an activation energy of 8.12 kcal/mol. The findings are compared with existing experimental data, highlighting the influence of thermal environments on pyrolysis mechanisms and product distributions.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106789"},"PeriodicalIF":5.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425787","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 new approach to evaluate the overall heat transfer coefficient of a fluidized bed biomass pyrolyzer 评估流化床生物质热解器总体传热系数的新方法

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-10-01 DOI: 10.1016/j.jaap.2024.106778

H.T. Lin , A.D.K. Wibowo , T.F. Wang , H.H. Chiu , W.Y. Hsu , A.N. Huang , H.P. Kuo

{"title":"A new approach to evaluate the overall heat transfer coefficient of a fluidized bed biomass pyrolyzer","authors":"H.T. Lin , A.D.K. Wibowo , T.F. Wang , H.H. Chiu , W.Y. Hsu , A.N. Huang , H.P. Kuo","doi":"10.1016/j.jaap.2024.106778","DOIUrl":"10.1016/j.jaap.2024.106778","url":null,"abstract":"<div><div>The heat transfer characteristics of non-pretreated rice husk pyrolysis in a fluidized bed with alumina beads (500 μm - 590 μm) as bed material are studied. Assuming instantaneous heating of biomass to the reaction temperature, the effective overall heat transfer coefficient of the system (UA) is initially calculated based on the compositions of the collected products and reaction temperature. UA ranges from 0.82 to 2.95 W/K. This heat transfer coefficient study allows <em>ad hoc</em> product distributions to be predicted from theoretical bases. The effects of the biomass feeding rate (F) and the bed height (H/D) on UA values are also analyzed. Highest UA and specific heat of the pyrolysis reaction of −3.35 MJ/kg are found at F = 5 g/min and H/D = 1.0, where H/D is the largest and F is the lowest in the range studied. Upon feeding of the low thermal conductivity biomass, UA typically decreases. However, if the bed materials are limited, the fed biomass and its produced char act as an auxiliary heating medium to improve the effective heat transfer coefficient. High UA improves the efficiency of the pyrolysis reaction, but it decreases the bio-oil fraction in the product due to secondary decomposition.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106778"},"PeriodicalIF":5.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425789","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

Microwave-assisted pyrolysis of pine wood waste: system development, biofuels production, and characterization 微波辅助热解松木废料：系统开发、生物燃料生产和特性分析

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-10-01 DOI: 10.1016/j.jaap.2024.106799

Vanessa Ramos do Nascimento , Mariangela Bruch dos Santos , Lisiane Diehl , José Neri Gottfried Paniz , Fernanda de Castilhos , Cezar Augusto Bizzi

{"title":"Microwave-assisted pyrolysis of pine wood waste: system development, biofuels production, and characterization","authors":"Vanessa Ramos do Nascimento , Mariangela Bruch dos Santos , Lisiane Diehl , José Neri Gottfried Paniz , Fernanda de Castilhos , Cezar Augusto Bizzi","doi":"10.1016/j.jaap.2024.106799","DOIUrl":"10.1016/j.jaap.2024.106799","url":null,"abstract":"<div><div>In this work a pyrolysis system heated by microwave radiation (microwave-assisted pyrolysis, MAP) was developed to produce bio-oil, biochar, and biogas using pine wood residue as feedstock. For this purpose, a multimode microwave cavity was modified to allocate a quartz reactor used for pyrolysis. Some pieces of SiC were used as microwave absorbent material, which were placed externally to the quartz reactor (non-premixed approach), allowing a fast heating rate and cooling down the reactor. After assembling the system, the performance of the proposed MAP approach was investigated through the microwave irradiation time (10, 15, and 20 min) and the temperature of the process (500, 600, and 700 °C). The best results were obtained with 500 °C and a total process time of 10 min, which produced 65 %, 33 %, and 2 % of bio-oil, biochar, and biogas, respectively. Higher temperatures (600 or 700 ºC) resulted in an oily phase with higher acidity, besides a non-significant increment in the yields. The yields obtained using the proposed MAP approach were compared with those obtained using conventional pyrolysis (47 %, 32 %, and 21 % of bio-oil, biochar, and biogas, respectively). The biochar produced by MAP presented a high heating value (HHV) of 26 MJ/kg. As the main advantages of the proposed MAP approach, it is possible to highlight the shorter pyrolysis time, faster heating and cooling rates, no feedstock pretreatment before pyrolysis, nor the use of catalysts, and it was considered a clean source of production of bioproducts.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106799"},"PeriodicalIF":5.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142444597","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

Preparation of porous carbon from hydrothermal treatment products of modified antibiotic mycelial residues and its use in CO2 capture 利用改性抗生素菌丝体残留物的水热处理产物制备多孔碳及其在二氧化碳捕集中的应用

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-10-01 DOI: 10.1016/j.jaap.2024.106812

Haibin Guan , Qinghe Bao , Liangbei Liu , Baofeng Zhao , Cunqing Zhong , Bari Wulan , Suxiang Liu , Xinru Qian , Di Zhu , Xiangyu Feng

{"title":"Preparation of porous carbon from hydrothermal treatment products of modified antibiotic mycelial residues and its use in CO2 capture","authors":"Haibin Guan , Qinghe Bao , Liangbei Liu , Baofeng Zhao , Cunqing Zhong , Bari Wulan , Suxiang Liu , Xinru Qian , Di Zhu , Xiangyu Feng","doi":"10.1016/j.jaap.2024.106812","DOIUrl":"10.1016/j.jaap.2024.106812","url":null,"abstract":"<div><div>Antibiotic mycorrhizal residues (AMR) are valuable organic wastes but have become a significant environmental and economic challenge due to their potentially hazardous nature and high treatment costs. In this study, an environmentally friendly and low-cost in situ nitrogen-doped porous carbon material was successfully prepared by hydrothermal carbonisation combined with KOH activation for efficient CO<sub>2</sub> capture. The obtained material was systematically characterized and tested, and its physical and chemical properties were analyzed. By adjusting the activation temperature from 600 to 800 °C, the prepared porous carbon materials exhibited different specific surface areas (648.41–1712.72 m²/g), pore volumes (0.310–0.879 cm³/g), and the nitrogen was uniformly distributed in the carbon skeleton. The optimal N-doped porous carbon demonstrated the adsorption capacities of 3.99 mmol g<sup>−1</sup> at 25 ℃ and 5.35 mmol g<sup>−1</sup> at 0 ℃ under 1 bar. In addition, the prepared adsorbents exhibited excellent CO<sub>2</sub>/N<sub>2</sub> selectivity, high isosteric heat, and good cyclic stability. These excellent CO<sub>2</sub> adsorption properties were attributed to the highly developed microporous structure of the materials and the uniformly distributed nitrogen functional groups in the carbon skeleton. Overall, the results highlight the great potential of this class of heteroatom-doped novel carbon materials as selective CO<sub>2</sub> adsorbents, providing a practical way to seek efficient CO<sub>2</sub> abatement solutions.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106812"},"PeriodicalIF":5.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142444665","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

High-value conversion of invasive plant into nitrogen-doped porous carbons for high-performance supercapacitors 将入侵植物高价值转化为掺氮多孔碳，用于高性能超级电容器

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-10-01 DOI: 10.1016/j.jaap.2024.106814

Shan Zhong , Hao Xu , Xiaojun Zheng , Guanlin Li , Shuang Wang

{"title":"High-value conversion of invasive plant into nitrogen-doped porous carbons for high-performance supercapacitors","authors":"Shan Zhong , Hao Xu , Xiaojun Zheng , Guanlin Li , Shuang Wang","doi":"10.1016/j.jaap.2024.106814","DOIUrl":"10.1016/j.jaap.2024.106814","url":null,"abstract":"<div><div>Given the harm caused by invasive plants to the environment and the high cost of treatment, we propose high-value transformation and utilization for invasive plants. Highly porous carbon derived from invasive plant (Canada goldenrod) was successfully synthesized through a feasible and green carbonization approach, which was firstly utilized as supercapacitor electrode. It is found that the addition of nitrogen (N)-rich chlorella could positively increase the N content and considerably boost the specific surface area up to 2231.41 m<sup>2</sup> g<sup>−1</sup> for the resultant Carbon-GC<sub>1</sub>-800, which are crucial factors for accelerating the ion transport and improving the capacitive behaviors. Notably, Carbon-GC<sub>1</sub>-800 exhibits the highest ratio (70.9 %) of microporous volume to total pore volume. The electrochemical properties of Carbon-GC<sub>1</sub>-800 electrode exhibits an outstanding specific capacitance of 388.2 F g<sup>−1</sup> at a current density of 0.5 A g<sup>−1</sup> and a superb rate capability of 75.7 % from 0.5 A g<sup>−1</sup> to 10 A g<sup>−1</sup>. The assembled symmetric supercapacitor with ionic liquid as electrolyte demonstrates the exceptional maximum power density of 8753.7 W kg<sup>−1</sup> and peak energy density of 59.3 Wh kg<sup>−1</sup>. This study presents the novel ideas and effective techniques to produce porous carbons for energy storage from invasive plant resources.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106814"},"PeriodicalIF":5.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438377","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 fast pyrolysis of jujube sawdust over two core–shell micro/mesoporous zeolites: Impact of mesoporous structure and aluminum sources 两种核壳微/介孔沸石催化红枣锯末快速热解：介孔结构和铝源的影响

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-10-01 DOI: 10.1016/j.jaap.2024.106807

Jiaomei Liu , Xiangfei Xue , Yunan Yang , Jie Liang

{"title":"Catalytic fast pyrolysis of jujube sawdust over two core–shell micro/mesoporous zeolites: Impact of mesoporous structure and aluminum sources","authors":"Jiaomei Liu , Xiangfei Xue , Yunan Yang , Jie Liang","doi":"10.1016/j.jaap.2024.106807","DOIUrl":"10.1016/j.jaap.2024.106807","url":null,"abstract":"<div><div>Core–shell zeolites have been used to improve bio-oil quality in biomass catalytic fast pyrolysis (CFP), yet research on shell materials remains limited. This study explores ZSM-5@MCM-41 and ZSM-5@SBA-15 core–shell micro/mesoporous zeolites, including their Al-containing variants synthesized with sodium aluminate (SA), aluminum sulfate (AS), and aluminum isopropoxide (AI) as Al sources, for improving bio-oil quality during biomass CFP. The samples were thoroughly characterized using powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, N<sub>2</sub> adsorption–desorption, and NH<sub>3</sub>-TPD techniques. CFP experiments using jujube sawdust examined the impact of mesoporous structure and Al sources on bio-oil yield and quality. Results indicated that ZSM-5@MCM-41, with a smaller mesoporous structure and higher acid strength, showed 1.7 times greater hydrocarbon selectivity compared to ZSM-5@SBA-15 (20.6 % vs. 12.4 % by area). The incorporation of Al into the MCM-41 shell led to a decrease in bio-oil yield, with the order being ZSM-5@MCM-41 > ZSM-5@MCM-41-AI > ZSM-5@MCM-41-AS > ZSM-5@MCM-41-SA, owing to the combined effects of strong acid sites and mesoporosity. However, the hydrocarbon selectivity of ZSM-5@Al-MCM-41 catalysts decreased by 15.6–19.5 % owing to reduced mesoporous volume. Conversely, while the incorporation of Al in the SBA-15 shell also reduced bio-oil yield, it increased hydrocarbon production by 27.0–47.6 %. Also, the hydrocarbons selectivity was related to the acid strength of the ZSM-5@Al-SBA-15 catalysts, demonstrating that strong acid sites are more effective in regulating bio-oil quality than porosity.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106807"},"PeriodicalIF":5.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425737","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 hydrolyzed lignin using HZSM-5/MCM-41 supported transition-metal to produce monocyclic aromatic hydrocarbons 使用 HZSM-5/MCM-41 支持的过渡金属催化热解水解木质素以生产单环芳烃

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-10-01 DOI: 10.1016/j.jaap.2024.106819

Wei Wang, Zhaoping Zhong, Xiang Zheng, Qihang Ye, Yihui Li, Yuxuan Yang

{"title":"Catalytic pyrolysis of hydrolyzed lignin using HZSM-5/MCM-41 supported transition-metal to produce monocyclic aromatic hydrocarbons","authors":"Wei Wang, Zhaoping Zhong, Xiang Zheng, Qihang Ye, Yihui Li, Yuxuan Yang","doi":"10.1016/j.jaap.2024.106819","DOIUrl":"10.1016/j.jaap.2024.106819","url":null,"abstract":"<div><div>Hydrolyzed lignin (HL), one kind of organic solid wastes, comes from the production of hydrolysis of lignocellulosic biomass for high-value chemicals, unsuitable treatment of which not only meaning the waste of resources but also resulting environmental pollution. The pyrolysis of HL has the problem of high oxygen-containing compounds and low hydrocarbons in the products. The HZSM-5/MCM-41 (HM) meso-microporous composite catalyst, containing nickel and molybdenum, was synthesized through impregnation to enhance the production of monocyclic aromatic hydrocarbons (MAHs) during the in-situ catalytic pyrolysis of hydrolyzed lignin. Different transition metals loaded on composite molecular sieves were prepared for comparison. The relationship between catalyst structure and pyrolysis efficiency was studied based on characterization techniques including SEM, BET, and XRD. This study investigated the catalytic properties of modified composite molecular sieves with Ni and Mo at different loaded ratios on the pyrolysis of hydrolyzed lignin. Results indicated that HM loaded with different metals had different catalytic pyrolysis selectivity. The relative yield of MAHs on 3 %Ni-HM was the highest, at 27.78 %, while that of phenolic on 5 %Mo-HM was 51.02 %. Thus, by modifying the co-loading ratios between Ni and Mo, the combined catalytic pyrolysis of hydrolyzed lignin was performed, achieving a 39.24 % yield of MAHs on the catalyst Mo<sub>1</sub>Ni<sub>2</sub>-HM, markedly surpassing the 17.69 % yield from unaltered HZSM-5/MCM-41. In addition, the improvement of active sites was caused by transition metals loaded and the synergistic effect between bimetals enhanced the catalytic activity and stability. HZSM-5/MCM-41 loaded with metal oxides promoted the depolymerization of macromolecules in the intermediate products of pyrolysis, and thus improved the relative yield of MAHs among pyrolysis products of hydrolyzed lignin.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106819"},"PeriodicalIF":5.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433678","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

Carbonisation of lignin in the presence of a eutectic salt mixture: Identifying the lignin properties that govern the characteristics of the resulting carbon material 在共晶盐混合物存在下对木质素进行碳化：确定影响碳材料特性的木质素特性

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-10-01 DOI: 10.1016/j.jaap.2024.106811

Daria Robertson, Paula Nousiainen, Leena Pitkänen, Inge Schlapp-Hackl, Dmitrii Rusakov, Michael Hummel

{"title":"Carbonisation of lignin in the presence of a eutectic salt mixture: Identifying the lignin properties that govern the characteristics of the resulting carbon material","authors":"Daria Robertson, Paula Nousiainen, Leena Pitkänen, Inge Schlapp-Hackl, Dmitrii Rusakov, Michael Hummel","doi":"10.1016/j.jaap.2024.106811","DOIUrl":"10.1016/j.jaap.2024.106811","url":null,"abstract":"<div><div>Numerous studies have explored the behaviour of various lignin types during carbonisation. Yet, misconceptions persist regarding the effects arising from both the source plant and production method of lignin. Lignin is often referenced merely by type, lacking detailed characterisation. Our research examines the properties of three lignin types, elucidates their behaviour during pyrolysis, and establishes the structure-property correlation and interaction of lignin with deep eutectic solvents. By combining several analytical techniques — including NMR, FTIR, XPS, TGA-MS for functional group detection, and HPLC, EA, and ICP for compositional analysis, alongside particle size distribution and SEC for morphology — we can conduct a thorough analysis that facilitates a meaningful comparison across lignin types. This approach allows for better control over the desired carbon properties. Furthermore, we demonstrate how modification with deep eutectic solvents enables the production of biochar from different lignin types, exhibiting properties conducive to large-scale, one-step sustainable production of biochar.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106811"},"PeriodicalIF":5.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142536051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deactivation of chromated copper arsenate as a catalyst in smouldering of wood 铬化砷酸铜作为木材烟熏催化剂的失活作用

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-10-01 DOI: 10.1016/j.jaap.2024.106824

Wenxuan Wu , Felix Wiesner , Juan P. Hidalgo , Jeffrey J. Morrell , Luis Yermán

{"title":"Deactivation of chromated copper arsenate as a catalyst in smouldering of wood","authors":"Wenxuan Wu , Felix Wiesner , Juan P. Hidalgo , Jeffrey J. Morrell , Luis Yermán","doi":"10.1016/j.jaap.2024.106824","DOIUrl":"10.1016/j.jaap.2024.106824","url":null,"abstract":"<div><div>Chromated copper arsenate (CCA) is a preservative treatment that enhances the biodegradation resistance of wood, essential for prolonging the service life of exterior infrastructure. However, the susceptibility of CCA-treated wood to smouldering combustion presents a significant challenge, as the metals present in the CCA catalyze the smouldering. In this work, we examined the oxidative behaviour of char produced from CCA-treated wood through dynamic thermogravimetric analysis. There was a gradual decrease in the catalytic activity of the CCA as temperature increased, particularly above 400 °C. At this stage, lignin undergoes secondary pyrolysis, and thermal decomposition of CCA complexes occurs. The thermal decomposition of CCA-treated wood at temperatures above 650 °C was similar to that of untreated wood, indicating the possible deactivation of the CCA. The agglomeration of species containing Cu or Cr above 650 °C might be responsible for the deactivation. This process is influenced by simultaneous lignin pyrolysis and decomposition of CCA complexes, which are also likely contributors to the loss of CCA's catalytic activity. This research introduced a novel experimental approach to assess the catalytic effects of CCA on char oxidation at elevated temperatures, offering valuable insights into CCA deactivation and its implications for fire safety. It also contributes to the development of potential modifications to CCA formulations aimed to reduce smouldering in wildfire-prone regions.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106824"},"PeriodicalIF":5.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142535667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0