Journal of Analytical and Applied Pyrolysis最新文献

{"title":"Exploring the pyrolysis of Agave species as a novel bioenergy source: Thermo-kinetics, modeling, and product composition insights","authors":"Jean Constantino Gomes da Silva ,&nbsp;Santiago Arias ,&nbsp;José Geraldo A. Pacheco ,&nbsp;Fábio Trigo Raya ,&nbsp;Gonçalo Amarante Guimarães Pereira ,&nbsp;Gustavo Mockaitis","doi":"10.1016/j.jaap.2025.107053","DOIUrl":"10.1016/j.jaap.2025.107053","url":null,"abstract":"<div><div>The <em>Agave</em> economic chain generates a significant waste, which has potential for sustainable bioenergy through pyrolysis. However, the diversity and heterogeneity of chemical composition of <em>Agave</em> species may pose challenges. This study investigates the impact of species heterogeneity on the pyrolysis of three <em>Agave</em> species (<em>Agave sisalana</em>, <em>Agave tequilana</em>, and <em>Agave wercklei</em>), aiming to correlate pyrolysis and biomass properties. Solid characterization and Py-GC/MS were used to understand <em>Agave</em> physicochemical characteristics and organic group distribution in volatiles, respectively. A multi-step model and advanced numerical methods were employed for the kinetic study. The physicochemical characteristics showed similar values but a distinct distribution of inorganic compounds, predominantly composed of alkali and alkaline earth metals (6–11 %_w.b.), potentially influencing the organic groups’ distribution in the volatiles. High relative areas of aliphatic components (13–28 % at 773 K and 16–36 % at 873 K) and low quantity of acidic groups (&lt;2 %) could be attributed to the catalytic deoxygenation promoted by alkali and alkaline earth metals. These findings are significant for future application of <em>Agave</em> in bio-oil production by pyrolysis, as commercial biomasses often yield a high content of oxygenated and acid groups. For the kinetic study, six decomposition profiles were identified in the pyrolysis, encompassing the decomposition of extractives, saponins, lignocellulose, and oxalate salts. The similarity in profiles resulted in approximately equivalent kinetic parameter values and mechanisms among the species. The average values of <em>E</em>_<em>a</em> ranged from 71 to 324 kJ mol⁻¹, <em>k</em>₀ values varied between 10⁷-10²², and the reaction mechanisms included n-order and Avrami-Erofeyev types. The validity of the parameters was verified through curve reconstruction. The inorganic composition was chosen as the parameter related to pyrolysis characteristics, as it was the only parameter that differed significantly among the species. Based on the data, normalization and the proposed model demonstrated satisfactory values of <em>R</em>² (&gt;0.9251), <em>QOF</em> (&gt;94 %), and MSE (&lt;2.73 ×10⁻³). This underscores the model's potential to describe decomposition profiles solely based on knowledge of inorganic composition, regardless of selected <em>Agave</em> species.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"188 ","pages":"Article 107053"},"PeriodicalIF":5.8,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465035","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}

{"title":"Effect of CaO addition on fast pyrolysis behavior of solid waste components using Py GC/MS","authors":"Jun Dong ,&nbsp;Yuanjun Tang ,&nbsp;Yangqing Hu ,&nbsp;Shifeng Wang ,&nbsp;Zhaozhi Zhou ,&nbsp;Yuxin Shi ,&nbsp;Cunen Liu ,&nbsp;Fei Wang","doi":"10.1016/j.jaap.2025.107055","DOIUrl":"10.1016/j.jaap.2025.107055","url":null,"abstract":"<div><div>Pyrolysis is a promising approach for treating and recovering solid waste. Herein, we experimentally explored the fast pyrolysis of typical solid waste components, including wood biomass, food waste, and Polyvinyl Chloride (PVC) plastic, using the analytical Pyrolysis Gas Chromatography-Mass Spectrometry (Py GC/MS) technique. The chemical compositions of the volatile organic compounds in pyrolytic tar were detected and compared. The effect of the in-situ addition of calcium oxide (CaO) on the process was also validated. Results showed that different waste components yielded varied pyrolysis products. <em>In-situ</em> CaO addition influenced both the types and relative contents of pyrolysis tar species. The most common products from wood biomass pyrolysis were phenols (24.24 % and 34.87 % without and with CaO addition, respectively) and benzenes (15.77 % and 14.72 % without and with CaO addition, respectively). On the other hand, the most common products from food waste pyrolysis were aldehydes (18.09 % and 3.69 % without and with CaO addition, respectively) and ketones (14.45 % and 33.09 % without and with CaO addition, respectively). The most common products from PVC plastic pyrolysis were benzenes (31.87 % and 28.11 % without and with CaO addition, respectively) and naphthalenes (20.71 % and 25.58 % without and with CaO addition, respectively). During waste pyrolysis, the presence of CaO significantly reduced the formation of acidic compounds, ethers, and aldehydes through decarboxylation and decarbonylation reactions. Regarding the generation of valuable chemicals, the addition of CaO facilitated BTXN synthesis from wood and food waste pyrolytic tar. However, it slightly reduced the relative BTX content from PVC pyrolytic tar. These findings could form the basis for developing resource recovery strategies from solid waste using pyrolysis technology.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"188 ","pages":"Article 107055"},"PeriodicalIF":5.8,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474964","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}

{"title":"Study on the kinetics and mechanism of thermal decomposition of bisphenol A-type polyarylates","authors":"Zhoufeng Wang ,&nbsp;Xiubo Long ,&nbsp;Wenlong Yao ,&nbsp;Wenchi Zhang ,&nbsp;Jinian Yang","doi":"10.1016/j.jaap.2025.107040","DOIUrl":"10.1016/j.jaap.2025.107040","url":null,"abstract":"<div><div>Three BPA-type polyarylates (PARS, PARB and PARF) with the same feeding ratio were synthesized by interfacial polymerization by doping three bisphenol A (BPA) derivative monomers (4,4’-sulfobisphenol (BPS), 2,2-bis(4-hydroxy phenyl)butane (BPB) and 9,9-bis(4-hydroxyphenyl)fluorene (BHPF)). The kinetics of thermal decomposition of polyarylate was studied by three methods and the activation energies of PARS, PARB and PARF were 198.34, 218.12 and 234.96 kJ/mol, respectively. The thermal stability of the three polyarylates followed PARS &lt; PARB &lt; PARF. Fitted by the integral Master-Plots method, the random nucleation was the pyrolysis mechanism of BPA-type polyarylates. Further elucidation of the pyrolysis process was attained through the deployment of thermogravimetric analysis coupled with Fourier transform infrared spectrometry (TG/FTIR) and pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS). The study suggested that the pyrolysis pathways of polyarylates were significantly influenced by the properties of their backbone groups; specifically, the breaking weaker bonds (e.g., C–S, C–O) facilitated the initial cleavage of molecular chains. This preliminary disruption then catalyzed further decomposition, forming the reactive radicals that subsequently underwent self-association or isomerization, culminating in new compounds. The effect of BPA-derived monomers on the thermal properties and pyrolytic behaviour of polyarylate was clearly demonstrated in this study.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"188 ","pages":"Article 107040"},"PeriodicalIF":5.8,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454628","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}

{"title":"Complete valorization of lignocellulosic biomass through integrated reductive catalytic fractionation and microwave-assisted pyrolysis","authors":"Xu Yang,&nbsp;Jiajun Yu,&nbsp;Mingxun Zeng,&nbsp;Zhicheng Luo,&nbsp;Huiyan Zhang","doi":"10.1016/j.jaap.2025.107049","DOIUrl":"10.1016/j.jaap.2025.107049","url":null,"abstract":"<div><div>Reductive catalytic fractionation (RCF) of lignocellulosic biomass produces phenolic-rich lignin oil and carbohydrate pulp, but catalyst separation is usually required for pulp utilization. This study introduces an integrated process combining RCF with microwave-assisted pyrolysis (RCF-MAP), enabling complete biomass valorization without catalyst separation. Using Ni/AC, RCF generates phenolic-rich lignin oil and high-quality carbohydrate pulp. The RCF-derived carbohydrate pulp can be directly subjected to microwave-assisted pyrolysis, producing syngas yields of 49.5 wt% with a high H₂ to CO ratio of approximately 1:1, suitable for hydroformylation. The Ni/AC catalyst can be recycled back into the MAP process, preventing deactivation seen in conventional thermal pyrolysis. On-line gas analysis revealed that the microwave environment enhances secondary cracking of liquid products, contributing to the hydrogen formation. Mass flow analysis reveals that birch biomass yields approximately 18.9 wt% of lignin oil, 29.6 wt% of syngas (H₂ and CO), 20.1 wt% of bio-oil, and 4.9 wt% of char. This integrated RCF-MAP approach efficiently produces both phenolic chemicals and high-quality syngas, supporting industrial-scale utilization of all biomass fractions.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"188 ","pages":"Article 107049"},"PeriodicalIF":5.8,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465036","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}

{"title":"Converting biomass tar into N-doped biochar: A promising anode material for enhanced sodium-ion batteries","authors":"Guangxing Wu ,&nbsp;Huan Zhang ,&nbsp;Xiuqiang Zhang ,&nbsp;Qian Guan ,&nbsp;Weiwei Zhang ,&nbsp;Jia Lu ,&nbsp;Weijuan Lan ,&nbsp;Zaifeng Li ,&nbsp;Shuhua Yang ,&nbsp;Hongying Shi","doi":"10.1016/j.jaap.2025.107051","DOIUrl":"10.1016/j.jaap.2025.107051","url":null,"abstract":"<div><div>Intensifying fossil fuel crisis has raised significant attention to the utilization of biomass energy, particularly biomass gasification technology, which is pivotal for its large-scale application. However, the generation of biomass tar during gasification remains a major obstacle. Due to the high carbon content of biomass tar and its compositional and property similarities to coal tar and pitch, this study explores the synthesis of nitrogen-doped biochar by combining urea with biomass tar, and evaluates its potential use as an anode material in sodium-ion batteries. The synthesized material, denoted as NT2–1000 (with a urea-to-biomass tar mass ratio of 2:1 and a carbonization temperature of 1000 °C), exhibited a reversible capacity of 257.49 mAh g⁻¹ at a current density of 25 mA g⁻¹, achieving an initial coulombic efficiency of 59.34 %. After 50 cycles at 50 mA g⁻¹, the capacity almost unchanged. At a higher current density of 1000 mA g⁻¹, the material retained 70.33 % of its initial capacity of over 200 cycles (122.6 mAh g⁻¹), demonstrating excellent rate capability and cycling stability, which is desirable for sodium-ion battery anodes. This research presents a novel method for valorizing carbon from biomass tar, thus promoting the high-value use of waste products generated in energy production processes.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"188 ","pages":"Article 107051"},"PeriodicalIF":5.8,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465037","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}

{"title":"Effect of hydrothermal and hydrothermal oxidation pretreatment on the physicochemical properties of biochar pellet and activated carbon prepared from biomass wastes","authors":"Sen Lang,&nbsp;Shouyu Zhang,&nbsp;Jifan Yang,&nbsp;Yi Zhou,&nbsp;Zihang Xu,&nbsp;Xiuyuan Han,&nbsp;Jiantian Huang","doi":"10.1016/j.jaap.2025.107007","DOIUrl":"10.1016/j.jaap.2025.107007","url":null,"abstract":"<div><div>Hydrothermal (HT) pretreatment and hydrothermal oxidation (HTO) pretreatment can change the internal chemical components of biomass wastes to effectively promote the diversified utilization of the biomass resource and upgrade the quality of terminal productions. In this paper, cotton stalk (CS) and Fir wood sawdust (FS) were pretreated firstly at 160–260 °C to prepare the biochar pellets and activated carbon respectively. The effect of evolution behavior of the three components in CS/FS during HT/HTO process on the physicochemical properties of biochar pellets and activated carbon is explored. The results indicate that HT and HTO pretreatment are beneficial to the quality of biochar pellets and activated carbon. Compared with HT pretreatment, HTO process can effectively alleviate the pretreatment intensity of the preparation of high-quality biochar pellets and activated carbon. HTO pretreatment can promotes the significantly decompositions of cellulose and hemicellulose and aromatization growth of CS/FS. The biochar pellets with higher physical properties can be prepared at the HT temperature of 230 °C and at the HTO temperature of 200 °C respectively, and the physical properties of the samples prepared from FS basically higher than CS. Crystalline cellulose is the main contributor to the physical property of biochar pellets. The HHV of biochar pellets prepared from pretreated FS is basically higher than CS, and the cellulose is responsible for the increasing HHV. HT and HTO pretreatment can significantly improve the energy density of CS/FS samples, and the apparent density has the crucial effect on the energy density than HHV. The increasing of cellulose content is conductive to the improvement of combustion performance of biochar pellets, while recondensed lignin in FS prepared by HTO process also has the higher HHV and combustion performance. The total yield of resulted samples was affected by the combination of pretreatment yield and activation yield. Compared with the direct activation, the total yield of pretreated CS activated carbon prepared by HT and HTO pretreatment could up to 166.6 % and 118.4 % respectively, and 189.8 % and 118.9 % for FS samples. CS is the more excellent precursor to prepare high-quality activated carbon than FS. Compared with HT pretreatment, the higher specific surface area and adsorption capacity of resulted activated carbon can be obtained by HTO process, in which the iodine adsorption value of CS-HTO180-A and CS-HTO200-A meet the China standard of activated carbon for water purification (GB/T 13803.2–1999).</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"188 ","pages":"Article 107007"},"PeriodicalIF":5.8,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479589","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}

{"title":"In situ and ex situ catalytic microwave pyrolysis of biomass pellets using Ni/Al2O3 for hydrogen and bio-oil production","authors":"Mahendra Tiwari,&nbsp;Ravikrishnan Vinu","doi":"10.1016/j.jaap.2025.107044","DOIUrl":"10.1016/j.jaap.2025.107044","url":null,"abstract":"<div><div>Four different biomass feedstocks, viz., rice straw (RS), sugarcane bagasse (BG), pine wood (PW), and <em>Prosopis juliflora</em> (PJ), were pyrolyzed in a microwave reactor at 800 W- 800 °C, and the hydrogen generation potential was assessed under different conditions using Ni/α-Al₂O₃ catalyst. Uniquely, four different configurations were evaluated in this study, which include non-catalytic pyrolysis of biomass in powder and pellet forms, and catalytic pyrolysis of biomass pellets in in-situ and ex-situ modes. The hydrogen yield was high in the case of biomass pellets and in the presence of catalyst. The general trend was: (biomass pellets) _In-situ &gt; (biomass pellets) _Ex-situ &gt; biomass pellets &gt; powder biomass. The heating rates also followed the above trend for all biomass feedstocks. Gas yield increased by 2–10 % with pelletization of biomass, and 18–32 % with the use of catalyst due to efficient cracking of the pyrolysis vapours. The H₂:CO (mol/mol) ratio was higher in the case of in-situ pyrolysis mode, and the trend was: BG (1.60) &gt; PW (1.52) &gt; RS (1.32) ≈ PJ (1.31). In-situ catalytic pyrolysis of PW pellets yielded high amount of hydrogen (39 vol%, 27.7 g/kg_biomass). In-situ catalytic pyrolysis mode was effective for higher hydrogen yield due to better contact of the pyrolysates with the Ni catalyst that effectively promoted water gas shift reaction. Ex-situ catalytic pyrolysis of biomass pellets produced high yield of CO+CO₂. Detailed bio-oil composition analysis revealed that the selectivity to phenolics in the bio-oil obtained from biomass pellets (64–71 %) was more than that from biomass in powder form (51–61 %). Notably, in-situ catalytic pyrolysis of pellets resulted in a sharp decline in phenolic selectivity (22–45 %) accompanied by increased production of aliphatic oxygenates (38–52 %), and mild increase in aliphatic hydrocarbons. This study proves that microwave-assisted pyrolysis of biomass pellets is a promising strategy for hydrogen generation at high yields with good potential to reform the gases for further enhancement of hydrogen.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"189 ","pages":"Article 107044"},"PeriodicalIF":5.8,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526571","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}

{"title":"Water content effect on bituminous pyrolysis product distribution with ReaxFF molecular dynamics and experiment","authors":"Xin-xiao Lu ,&nbsp;Guo-yu Shi ,&nbsp;Guan Wang ,&nbsp;Shuo Wang ,&nbsp;Rui-nan Zhang ,&nbsp;Zi-yao Chen","doi":"10.1016/j.jaap.2025.107042","DOIUrl":"10.1016/j.jaap.2025.107042","url":null,"abstract":"<div><div>The water atmosphere exerts a profound effect on the coal pyrolysis process. The present study dissects the bituminous pyrolysis product distribution at 0 %-24 % water content and traces the N and S atom migration via the ReaxFF molecular dynamics (MD). The coal mass ratio exhibits a slow-rapid-slow decline as the temperature rises. The coal mass ratio transfers to the pyrolysis heavy tar, light tar, and gas by 2.65 %, 6.46 %, and 16.51 % at 2700 K. The remaining N and S atoms in char are 62.5 % and 43.3 %, and the migrated atoms mainly distribute in the light tar and gas. The N and S atoms tend to remove from the functional group C₄H₅N and R-S-R. The elevated temperature promotes the conversion from C-N and C-S to H-N and H-S that contributes to more NH₃ and H₂S. The minimum char and maximum gas mass arise at the 6 % water content with the lowest total bond number. The heavy and light tar mass peak appears at 12 % and 18 % water content. The active radicals OH∙ and H∙ rise at a higher water content. The research achievement has positive practical significance for the pollution control and efficiency improvement of coal pyrolysis.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"188 ","pages":"Article 107042"},"PeriodicalIF":5.8,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471373","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}

{"title":"Enhanced hydrodeoxygenation of biomass-derived polyols to light alkanes over boron oxide modified nickel silicate catalysts","authors":"Xin Jin ,&nbsp;Bo Chen ,&nbsp;Tao Pan,&nbsp;Lin Liu,&nbsp;Haonan Chen,&nbsp;Changyi Chen,&nbsp;Caiwei Wang,&nbsp;Yuanyuan Ge,&nbsp;Zhili Li","doi":"10.1016/j.jaap.2025.107043","DOIUrl":"10.1016/j.jaap.2025.107043","url":null,"abstract":"<div><div>Thermal-catalytic hydrodeoxygenation (HDO) of biomass-derived polyols is a potential route for producing renewable light alkanes, but developing efficient and economical non-precious metal catalysts is still challenging. In this study, a boron oxide moderated layered nickel silicate catalyst Ni-xB₂O₃/NiSi-PS was designed, and its performance and mechanism in the HDO reaction of C3–C6 polyols were systematically investigated. The characterization results showed that the introduction of B₂O₃ inhibited the agglomeration of active Ni⁰, reducing its particle size from 13.8 nm to 7.3 nm and significantly enhancing the Lewis acidity of the catalyst. Under the optimized reaction conditions (300 °C, 5 MPa H₂), high light alkane selectivity ranging from 70.1 % to 94.1 % were achieved for various C3–C6 polyols. Through detailed product analysis, the reaction network of polyol HDO was proposed, and the regulatory mechanism of B₂O₃ was revealed. The catalyst exhibited good stability and reductive regeneration ability, and the activity decreased only slightly after five cycles. This study provides insights into catalyst design for thermal-catalytic conversion processes, which is significant in promoting the sustainable development of the biomass refining industry.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"188 ","pages":"Article 107043"},"PeriodicalIF":5.8,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454629","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}

{"title":"Origin of hydrogen in products derived from catalyzed co-pyrolysis of glucose and polypropylene via deuterium labeling using TG-FTIR","authors":"Liwei Ma,&nbsp;Jing Weng,&nbsp;Junjie Xue","doi":"10.1016/j.jaap.2025.106994","DOIUrl":"10.1016/j.jaap.2025.106994","url":null,"abstract":"<div><div>Catalytic co-pyrolysis of biomass and hydrogen donors is one of the important ways to improve the quality of bio-oil. The hydrogen transfer pathways in co-pyrolysis are significant yet remain vague. In this study, an isotopic labeling method to label glucose (G) with deuterium (D) atoms was used to trace the hydrogen. The results show the catalysts influence the hydrogen transformation significantly and selectively. The shift of the infrared (IR) peaks proves that the hydrogen atoms in products - phenols, alcohols, carboxylic acids, aldehydes, and olefins contain both hydrogen from polypropylene (PP) and deuterium from G. While the hydrogen in aromatic rings, - CH₃ and - CH₂ all come from polypropylene. Furthermore, the deuterium atoms from G only enter the olefin products with catalyst potassium chloride (KCl) or activated carbon (AC). On the other hand, the oxygenated compound products mainly contain hydrogen atoms from polypropylene with any of the three catalysts. The potassium chloride helps the hydrogen from polypropylene transfer to the products of mainly phenols, aldehydes and alcohols. The AC transfers the hydrogen from polypropylene to the products of carboxylic acid, aldehydes, and phenols. For the ZSM-5, it helps the hydrogen from polypropylene transfer to the products of carboxylic acid and aldehydes. The results of this study are useful for improving the effective hydrogen content of the mixed pyrolysis reaction of biomass.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"188 ","pages":"Article 106994"},"PeriodicalIF":5.8,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454560","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}