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

Microwave co-pyrolysis characteristics and product component of Chlorella vulgaris and polypropylene under solid acid catalyst/graphite composite additives

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-02-06 DOI: 10.1016/j.jaap.2025.107002

Jian Zhao , Ronglin Yang , Shiyuan He , Chunxiang Chen , Zhiwei Luo , Shouqiang Wan , Hongjian Ling

{"title":"Microwave co-pyrolysis characteristics and product component of Chlorella vulgaris and polypropylene under solid acid catalyst/graphite composite additives","authors":"Jian Zhao , Ronglin Yang , Shiyuan He , Chunxiang Chen , Zhiwei Luo , Shouqiang Wan , Hongjian Ling","doi":"10.1016/j.jaap.2025.107002","DOIUrl":"10.1016/j.jaap.2025.107002","url":null,"abstract":"<div><div>Appropriate additives can enhance the quality of bio-oil produced through microwave co-pyrolysis. In this paper, solid acid catalyst/graphite (SA/GP) composite additives at different ratios (SA:GP = 10:0, 7:3, 5:5 and 3:7, denoted as SA, S7G3, S5G5 and S3G7, respectively) were prepared. The effects of SA/GP addition (10 %, 20 %, 30 % and 40 %) on co-pyrolysis characteristics, product yield and bio-oil components of <em>Chlorella vulgaris</em> (CV) and polypropylene (PP) were studied by microwave pyrolysis furnace and GC-MS. Results showed only 40 % addition promoted the pre-middle stage of co-pyrolysis when adding SA. The maximum average weight loss rate <em>R</em><sub>v</sub> (0.839 wt%/min) and the minimum total pyrolysis reaction time <em>t</em><sub>s</sub> (88.250 min) were observed at 30 % S3G7. Compared with no additives, the maximum bio-oil yield (29.37 wt%) was obtained at 30 % S5G5 and the maximum hydrocarbon content (42.16 %) was obtained at 30 % S3G7. The porous structure of SA promoted the dehydration and aromatization of small molecules, resulting in a maximum aromatic yield of 11.77 % at 30 % S7G3. Overall, the SA/GP composite additives showed good stability and deoxidizing ability in microwave co-pyrolysis and can be used to improve the yield and quality of bio-oil.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"187 ","pages":"Article 107002"},"PeriodicalIF":5.8,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biochar produced from bio-refined herbaceous fibre residue for feed and technical purposes

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-02-05 DOI: 10.1016/j.jaap.2025.107004

Andrej Šáner , Morten Ambye-Jensen , Søren Krogh Jensen , Katrin Vorkamp , Marcel Ceccato , Aidan Mark Smith

{"title":"Biochar produced from bio-refined herbaceous fibre residue for feed and technical purposes","authors":"Andrej Šáner , Morten Ambye-Jensen , Søren Krogh Jensen , Katrin Vorkamp , Marcel Ceccato , Aidan Mark Smith","doi":"10.1016/j.jaap.2025.107004","DOIUrl":"10.1016/j.jaap.2025.107004","url":null,"abstract":"<div><div>Recent research and development in green biorefining aim to produce a sustainable protein feed from domestically grown grasses and legumes, that can substitute imported soymeal in animal feeds. A byproduct of this process is a high fibre press-cake fraction, that will require valorisation. Integration of pyrolysis of the press-cake into the herbaceous protein production is an innovative approach to increase the economic and environmental viability of the biorefinery. This work investigated the production of biochar for animal feed from the fibre press-cake via slow pyrolysis in a laboratory-scale batch reactor. Different herbaceous species were investigated (i.e. grass-clover and lucerne) as well as a range of pyrolysis conditions (i.e. temperature 400, 600 and 800 °C with residence time 20 and 60 minutes). The results showed that the level of severity of fibre processing within the green biorefinery affects the resulting biochar more than the type of the original biomass. The pyrolysis temperature had a greater effect on the resulting biochar than the residence time, with biochar yields continuously decreasing from 32 wt% at 400 °C to 22 wt% at 800 °C. Generally, all herbaceous biochars had rather uniform characteristics, as shown by elemental composition, FTIR and XPS. The levels of investigated organic contaminants (i.e. polychlorinated biphenyls and polycyclic aromatic hydrocarbons) were in all samples below the legal limits. All biochars had low adsorption capacity towards the methylene blue (less than 12 mg/g). However high carbon content (above 60 wt%) and Scanning Electron Microscope images suggested a good potential for carbon activation.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"187 ","pages":"Article 107004"},"PeriodicalIF":5.8,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377272","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

Improving biochar's phosphate adsorption using active metal substances in Byer red mud

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-02-05 DOI: 10.1016/j.jaap.2025.107006

Renhui Ruan , Weijian Hua , Wenjun Yang , Shiyao Jia , Jiahui Ma , Xue Zhao , Jinduo Wang , Xuebin Wang , Houzhang Tan

{"title":"Improving biochar's phosphate adsorption using active metal substances in Byer red mud","authors":"Renhui Ruan , Weijian Hua , Wenjun Yang , Shiyao Jia , Jiahui Ma , Xue Zhao , Jinduo Wang , Xuebin Wang , Houzhang Tan","doi":"10.1016/j.jaap.2025.107006","DOIUrl":"10.1016/j.jaap.2025.107006","url":null,"abstract":"<div><div>Modifying biochar with solid wastes enhances phosphate adsorption capacity and facilitates solid waste utilization. However, there is limited research on utilizing bulk solid wastes to improve the phosphates adsorption performance of biochar. In this study, a bulk industrial solid waste, Bayer red mud, was used as a modifier to improve the phosphate adsorption capacity of biochar. Several factors including mixing method and blending ratio of biomass and red mud, acid concentration, and pyrolysis temperature were investigated to determine their influence on the phosphate adsorption capacity of red mud modified biochar (RMB). The adsorption mechanisms were examined by analyzing adsorption kinetics, isotherms, thermodynamics, approximate site energy distribution, and biochar's physical and chemical properties. The results showed that acid impregnation with optimal blending ratio and pyrolysis temperature significantly increased the phosphate adsorption capacity of RMB up to 137.69 mg/g. The adsorption of phosphates by RMB followed the Pseudo 2nd order and Langmuir isotherm models, suggesting monolayer chemisorption on a homogeneous surface, as supported by the analysis of approximate site energy distribution. The characterizations of RMB suggested that the dominant mechanism for phosphate adsorption by RMB was precipitation, rather than ligand exchange or electrostatic attraction. Acid impregnation improves the extraction of Fe, Al, and Ca from Byer red mud, enhancing the dispersion of their oxides in biochar. Moreover, the P-rich RMB improved the growth of grass seedlings, suggesting its potential as a P fertilizer.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"187 ","pages":"Article 107006"},"PeriodicalIF":5.8,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350582","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

Influence of thermo-pressure synergistic effect on deoxygenation and aromatization reactions during extrusion pyrolysis of bagasse

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-02-05 DOI: 10.1016/j.jaap.2025.107003

Zhijie Gong , Kaiyue Zheng , Aishu Li , Kai Xu , Jun Xu , Long Jiang , Yi Wang , Sheng Su , Song Hu , Jun Xiang

{"title":"Influence of thermo-pressure synergistic effect on deoxygenation and aromatization reactions during extrusion pyrolysis of bagasse","authors":"Zhijie Gong , Kaiyue Zheng , Aishu Li , Kai Xu , Jun Xu , Long Jiang , Yi Wang , Sheng Su , Song Hu , Jun Xiang","doi":"10.1016/j.jaap.2025.107003","DOIUrl":"10.1016/j.jaap.2025.107003","url":null,"abstract":"<div><div>Biomass has the potential to replace coal, contributing to the mitigation of climate and energy challenges. The development of low-energy, high-quality biomass upgrading technologies is of significant importance. The biomass extrusion pyrolysis (EP) technology, which increases the pressure during the heating process of biomass pyrolysis, is anticipated to achieve the desired outcome. Pressure, temperature, and residence time were investigated for their effects on the physicochemical properties and structure of bagasse-derived biochar during EP. The volatile content of EP biochar decreased by 10.21∼12.63 % and the carbon fixation rate (CFR) increased by 23.04∼30.56 % compared with atmospheric pyrolysis (AP) biochar at the same temperature and residence time, below 6 MPa. A synergistic effect of pressure and temperature was observed, resulting in an approximately 10 % reduction in volatile content and a 10∼20 % increase in CFR of extruded pyrolysis products at 6 MPa, compared to AP above 240 °C. Below 240 °C, these values were lower. Comparing the pyrolysis product biochar of AP and EP, as well as those from low and high temperatures, FTIR and Raman analyses demonstrated that oxygen-containing functional groups decreased and the degree of aromatization increased, confirming that extrusion and temperature facilitated deoxygenation and aromatization. Extrusion caused pore structure contraction. In BET data, the specific surface area and pore volume decreased significantly. These, coupled with changes in the biochar's physicochemical properties, indicated that extrusion promoted volatile matter conversion into fixed carbon by gas-solid secondary reactions during pyrolysis.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"187 ","pages":"Article 107003"},"PeriodicalIF":5.8,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377270","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

Removal of tetracycline from aqueous solution by magnetic biochar modified with different iron valence and K2C2O4: A comparative study and mechanism

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-02-05 DOI: 10.1016/j.jaap.2025.107005

Guodong Hong , Zhenqiang Yu , Dexin Kong , Taoli Huhe , Rui Shan , Haoran Yuan , Yong Chen

{"title":"Removal of tetracycline from aqueous solution by magnetic biochar modified with different iron valence and K2C2O4: A comparative study and mechanism","authors":"Guodong Hong , Zhenqiang Yu , Dexin Kong , Taoli Huhe , Rui Shan , Haoran Yuan , Yong Chen","doi":"10.1016/j.jaap.2025.107005","DOIUrl":"10.1016/j.jaap.2025.107005","url":null,"abstract":"<div><div>Currently, the selection of iron valence states in composite-modified magnetic biochar prepared by co-pyrolysis exhibits a high degree of blindness. Therefore, this study compares the performance of biochar preparation via co-pyrolysis of three different iron valences (Fe<sup>2 +</sup>, Fe<sup>3+</sup>, and Fe<sup>6+</sup>) and potassium oxalate (K<sub>2</sub>C<sub>2</sub>O<sub>4</sub>) composite modification for tetracycline (TC) removal. The results indicate that the co-activation of potassium oxalate with different iron valences led to the formation of magnetic biochar with varying elemental contents, morphologies, and structures. Batch adsorption experiments demonstrate that KF3-BC has a high tetracycline removal rate over a wide pH range (3 – 11) and at high coexisting ion concentrations (1 – 100 mmol/L). Furthermore, experiments with synthetic swine wastewater in different matrices, the adsorption capacity of KF3-BC for TC (at a concentration of 100 mg/L) exceeds 81.09 mg/g. Additionally, under optimal conditions of 30 °C and pH = 5, the theoretical maximum adsorption capacity (Q<sub>max</sub>) for TC is as follows: KF3-BC (236.91 mg/g) > KF6-BC (169.42 mg/g) > KF2-BC (51.34 mg/g) > BC (38.41 mg/g). The adsorption processes of KF2-BC, KF3-BC, and KF6-BC all conform to the Pseudo-second-order and Freundlich models, implying that TC adsorption occurs at the multilayer molecular adsorption on heterogeneous surfaces, primarily driven by chemisorption. The primary adsorption mechanism between KF-BCs and TC molecules is the π–π EDA interactions. Additionally, hydrogen bonding, cation–π complexation, electrostatic interactions, and pore filling also contribute to the adsorption process. This study can assist in selecting the optimal iron source and chemical activator for composite modification of biochar for the adsorption of TC in wastewater.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"187 ","pages":"Article 107005"},"PeriodicalIF":5.8,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143334433","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

Deciphering synergistic effects in co-pyrolysis: Insights from pyrolysis-gas chromatography–mass spectrometry and evolved gas analysis for sustainable biorefineries

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-02-04 DOI: 10.1016/j.jaap.2025.106990

Crystal Chia Yin Ling , Elvi Horiyanto , Cynthia Melanie Lahey , Sam Fong Yau Li

{"title":"Deciphering synergistic effects in co-pyrolysis: Insights from pyrolysis-gas chromatography–mass spectrometry and evolved gas analysis for sustainable biorefineries","authors":"Crystal Chia Yin Ling , Elvi Horiyanto , Cynthia Melanie Lahey , Sam Fong Yau Li","doi":"10.1016/j.jaap.2025.106990","DOIUrl":"10.1016/j.jaap.2025.106990","url":null,"abstract":"<div><div>Harnessing synergistic interactions during co-pyrolysis provides a cost-effective and resource-efficient alternative to catalytic pyrolysis for optimizing product composition and quality. Despite recent progress in understanding these interactions, a systematic method to deconvolute the effects of synergism on bio-oil composition during co-pyrolysis has remained elusive. This study presents a novel method for deconvoluting synergistic effects during the co-pyrolysis of sewage sludge (SS) and polyethylene terephthalate (PET) using unique sample configurations and pyrolysis gas chromatography-mass spectrometry (Py-GCMS). Synergistic interactions during SS/PET co-pyrolysis were found to enhance decarboxylation and dehydration reactions, leading to the formation of novel compounds not observed in the individual pyrolysis of either feedstock. By utilizing unique sample configurations, the developed method identified vapor-phase interactions as the primary interface for these synergistic effects. Additionally, it determined the optimal co-pyrolysis conditions for maximizing benzoic acid production, demonstrating its dual effectiveness in uncovering synergistic mechanisms and optimizing product yields for biorefining applications. Overall, the developed method streamlines the deconvolution of synergistic interactions, making it a valuable tool for understanding synergistic interfaces and optimizing product yields for biorefining applications.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"187 ","pages":"Article 106990"},"PeriodicalIF":5.8,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350583","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

Kinetics, product distribution and synergistic effects on the co-pyrolysis processes for epoxy resins and balsa wood

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-02-04 DOI: 10.1016/j.jaap.2025.106995

Kunyuan Liu , Honggang Fan , Liubao Nie , Jing Gu , Haoran Yuan

{"title":"Kinetics, product distribution and synergistic effects on the co-pyrolysis processes for epoxy resins and balsa wood","authors":"Kunyuan Liu , Honggang Fan , Liubao Nie , Jing Gu , Haoran Yuan","doi":"10.1016/j.jaap.2025.106995","DOIUrl":"10.1016/j.jaap.2025.106995","url":null,"abstract":"<div><div>This work systematically examined the co-pyrolysis behaviors and product distribution of epoxy resins (EP) and balsa wood (BW) from waste wind turbine blades (WWTBs) using thermogravimetric analysis coupled with Fourier transform infrared spectroscopy and mass spectrometry (TG-FTIR-MS) and pyrolysis gas chromatography/mass spectrometry (Py-GC/MS). Kissinger-Akahira-Sunose (KAS) model, Flynn-Wall-Ozawa (FWO) model and distributed activation energy models (DAEM) were applied to analyze the co-pyrolysis kinetics. Thermogravimetric results showed that synergistic effects promoted thermal decomposition of the blends. The presence of EP dramatically reduced the energy barrier for BW decomposition. Three-Gaussian-DAEM (TG-DAEM) provided better fitting accuracy for co-pyrolysis behaviors. Product analysis indicated that co-pyrolysis promoted the generation of phenols and hexatomic ring compounds, likely due to Diels-Alder reactions, enhancing efficiency at early and middle stages of co-pyrolysis. However, macromolecules generated required additional energy for cracking into lighter products. Both synergistic and antagonistic effects were observed during co-pyrolysis. These findings are significant for WWTBs composites recovery and recycling.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"187 ","pages":"Article 106995"},"PeriodicalIF":5.8,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350581","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

Constructing the correlation between optical microstructures and macroscopic properties of medium temperature coal pitch-derived cokes

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-02-04 DOI: 10.1016/j.jaap.2025.107001

Jiaxing Yue , Jiao Huang , Yaming Zhu , Yuzhu Zhang , Jun Lv , Junxia Cheng , Xuefei Zhao

{"title":"Constructing the correlation between optical microstructures and macroscopic properties of medium temperature coal pitch-derived cokes","authors":"Jiaxing Yue , Jiao Huang , Yaming Zhu , Yuzhu Zhang , Jun Lv , Junxia Cheng , Xuefei Zhao","doi":"10.1016/j.jaap.2025.107001","DOIUrl":"10.1016/j.jaap.2025.107001","url":null,"abstract":"<div><div>With the rapid development of the new energy industry, pitch-derived coke now shows greater potential than graphite anode. For investigate the correlation between optical microstructures and macroscopic properties of pitch coke, 6 pitch cokes with varying structures were prepared from medium temperature coal pitch (MTP) and its 5 fractions. Then, these pitch cokes were applied in lithium-ion batteries to evaluate their electrochemical performances. The results showed that the optical microstructures of pitch coke have significant influence on the macroscopic properties including electrochemical performances. In fact, pitch coke with high anisotropic index (DRAS) possesses high capacity and low powder resistivity. Its fibrous structure brings better oxidation resistance. While the mosaic structure contributes more to the improvement of the micro-strength intensity (MSI) of pitch coke. In addition, fine and medium mosaic structure have obvious influence on the rate performance and Warburg factor (σ) of pitch coke, respectively. Among several pitch cokes, BAI-TS-1400 has the best rate performance and initial coulombic efficiency (73.84 %). After 400 cycles at 0.05 A·g<sup>−1</sup>, its capacity maintains 402.4 mAh·g<sup>−1</sup>, exhibiting nice cycle stability. Thus, it’s a promising for lithium-ion battery anodes material. This work provides theoretical and experimental support for the high value-added utilization of pitch coke.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"187 ","pages":"Article 107001"},"PeriodicalIF":5.8,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143334437","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

Activity and stability of Ni/magnesium slag catalysts enhanced by plasma pretreatment for toluene steam reforming

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-02-03 DOI: 10.1016/j.jaap.2025.106996

Jicheng Wang, Haimiao Yu, Hao Liang

{"title":"Activity and stability of Ni/magnesium slag catalysts enhanced by plasma pretreatment for toluene steam reforming","authors":"Jicheng Wang, Haimiao Yu, Hao Liang","doi":"10.1016/j.jaap.2025.106996","DOIUrl":"10.1016/j.jaap.2025.106996","url":null,"abstract":"<div><div>This study investigated the influence of plasma pretreatment on the catalytic performance of a nickel-based catalyst supported by magnesium slag (MS) in the catalytic steam reforming of toluene. The catalyst obtained after plasma pretreatment achieved the highest toluene conversion rate of 99.11 % and the substantial hydrogen yield of 3165.02 mL/g after 6 h of reaction. Additionally, at the end of the reaction, the toluene conversion rate of the plasma-pretreated catalyst was 92.56 %, which was 38.19 % higher than that of the calcined catalyst. Plasma pretreatment significantly enhanced the activity and stability of Ni-based catalyst in toluene steam reforming. Characterization results indicated that plasma treatment promoted the migration of metal species from pores to the external surface of the support and facilitated the formation of smaller Ni particles with higher dispersion. Therefore, plasma treatment exposed more active sites and enhanced the catalytic activity. Furthermore, plasma pretreatment improved the interaction between Ni and the support, generated more Ni(111) crystal planes, reduced the formation of filamentous carbon, accelerated the removal of carbon deposits, and thus enhanced the catalyst stability.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"187 ","pages":"Article 106996"},"PeriodicalIF":5.8,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143334438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Co-pyrolysis of Pingshuo coal and polystyrene via infrared heating to produce light aromatic hydrocarbons

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-02-03 DOI: 10.1016/j.jaap.2025.106997

Yunfei Wu , Yang Li , Lijun Jin , Haoquan Hu

{"title":"Co-pyrolysis of Pingshuo coal and polystyrene via infrared heating to produce light aromatic hydrocarbons","authors":"Yunfei Wu , Yang Li , Lijun Jin , Haoquan Hu","doi":"10.1016/j.jaap.2025.106997","DOIUrl":"10.1016/j.jaap.2025.106997","url":null,"abstract":"<div><div>The co-pyrolysis of coal and waste plastics is a viable method for achieving efficient and clean utilization of coal and waste and enhancing light aromatic hydrocarbon production. In this study, the co-pyrolysis of Pingshuo coal and polystyrene (PS) was carried out via rapid infrared heating in a fixed bed reactor with varying mixing ratios to investigate the product distribution, tar composition, and char characteristics. The results revealed that the increase of PS mixing ratio increased the interaction of the co-pyrolysis volatiles, which raised the tar and light aromatic hydrocarbons yield. Especially for the mixing ratio of coal/PS being 7:3, the content of styrene and ethylbenzene in tar is 31.5 % and 15.2 % higher than the theoretically calculated value, respectively. Moreover, co-pyrolysis promoted the interaction between volatiles to produce biphenyls such as 1,3-diphenylpropane. Electron paramagnetic resonance results indicated that the co-pyrolysis char exhibited higher amounts of methoxy ether and 1–3 cyclic π quinone free radicals, which was consistent with the decrease of phenols in the tar.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"187 ","pages":"Article 106997"},"PeriodicalIF":5.8,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143334436","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