Thermochimica Acta最新文献_第7页

Pyrolysis of industrial hemp biomass from contaminated soil phytoremediation: Kinetics, modelling transport phenomena and biochar-based metal reduction 受污染土壤植物修复中工业大麻生物质的热解：动力学、模拟迁移现象和基于生物炭的金属还原

IF 3.1 2区化学

Thermochimica Acta Pub Date : 2024-11-09 DOI: 10.1016/j.tca.2024.179899

Jure Voglar , Anže Prašnikar , Konstantin Moser , Elisa Carlon , Manuel Schwabl , Blaž Likozar

{"title":"Pyrolysis of industrial hemp biomass from contaminated soil phytoremediation: Kinetics, modelling transport phenomena and biochar-based metal reduction","authors":"Jure Voglar , Anže Prašnikar , Konstantin Moser , Elisa Carlon , Manuel Schwabl , Blaž Likozar","doi":"10.1016/j.tca.2024.179899","DOIUrl":"10.1016/j.tca.2024.179899","url":null,"abstract":"<div><div>Phytoremediation is the use of vegetation for the <em>in situ</em> treatment of contaminated environments. After plants have been used for phytoremediation of soils, their biomass can be used for example as value-added products or converted by thermochemical processes. Large-scale application of pyrolysis technology for phytoremediation biomass requires accurate predictive kinetic models and a characterization of the toxicity of the materials produced. The pyrolysis of industrial hemp (<em>Cannabis sativa</em> L.) was investigated on a laboratory scale by varying the process conditions and accurately modelled by considering four pseudo-components with first reaction order. The average value of the coefficients of determination is 0.9980. Biomass and biochar were characterized and the main components of the gas phase were monitored. We found Cd, Pb, and Zn in the roots, although in lower amounts than in the soil. Especially the leaves and stems showed negligible traces of these elements, so that these parts can be used directly, even if the hemp was grown on the polluted soil. After pyrolysis, the concentration of pollutants in the solid fraction decreased, which could be attributed to the reduction of metal oxides (or salts) to elemental form and subsequent evaporation. This pyrolysis process has the potential to treat heavy metal-rich biomass, with gas phase purification via condensation, yielding agricultural-grade biochar, CO-rich gas and a highly concentrated heavy metal stream in absorbent material.</div></div>","PeriodicalId":23058,"journal":{"name":"Thermochimica Acta","volume":"742 ","pages":"Article 179899"},"PeriodicalIF":3.1,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658911","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}

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Effects of Cu(OH)F nanoparticles on the thermal oxidation and ignition characteristics of micron-sized Al powder 纳米 Cu(OH)F 粒子对微米级铝粉热氧化和点火特性的影响

IF 3.1 2区化学

Thermochimica Acta Pub Date : 2024-11-08 DOI: 10.1016/j.tca.2024.179896

Jiaming Liu , Xinwen Ma , Wenhao Wang , Weiduo Fei , Xiandie Zhang , Xiang Ke , Xiang Zhou

引用次数: 0

Non-isothermal kinetic analysis of phase transformations in Fe-Co-V-Mo semi-hard magnetic alloy Fe-Co-V-Mo半硬磁性合金相变的非等温动力学分析

IF 3.1 2区化学

Thermochimica Acta Pub Date : 2024-11-06 DOI: 10.1016/j.tca.2024.179897

Maryam Kamali-Ardakani , Alireza Mashreghi , Saeed Hasani , Saeed Sadeghpour

{"title":"Non-isothermal kinetic analysis of phase transformations in Fe-Co-V-Mo semi-hard magnetic alloy","authors":"Maryam Kamali-Ardakani , Alireza Mashreghi , Saeed Hasani , Saeed Sadeghpour","doi":"10.1016/j.tca.2024.179897","DOIUrl":"10.1016/j.tca.2024.179897","url":null,"abstract":"<div><div>In this study, the non-isothermal kinetics and phase transformations within the Fe-Co-V-Mo alloy were investigated. Four distinct transformations were identified: disorder → order (T<sub>1</sub>), first-stage polymorphic (T<sub>2</sub>), order → disorder (T<sub>3</sub>), and second-stage polymorphic (T<sub>4</sub>). The activation energy (<em>E</em>) for each transformation was determined using isoconversional methods. Fitting model were employed to calculate the kinetic triplets, confirming that all transformations follow the Avrami model. The Johnson-Mehl-Avrami (JMA) and Šesták-Berggren (SB) models were used to determine other kinetic parameters (<em>n, M</em>, and <em>N</em>). The findings suggest that the growth mechanisms for transformations T<sub>3</sub> and T<sub>4</sub> are interface-controlled, whereas transformation T<sub>2</sub> is diffusion-controlled. Consequently, the A3/2 and A3 mechanisms were identified as predominant mechanisms for transformations T<sub>2</sub> and T<sub>4</sub>, respectively. Additionally, transformation T<sub>3</sub> follows the A3 mechanism at heating rates of 10 and 20 K/min, and the A2 mechanism at 30 K/min. Kinetic analysis revealed that the addition of Mo in Fe-Co-V alloys, acting as a ferrite (<em>α</em>) stabilizer, decreases the onset temperatures of transformations T<sub>1</sub> and T<sub>3</sub>. Conversely, it increases those of transformations T<sub>2</sub> and T<sub>4</sub>. Furthermore, Mo influences the reduction of <em>E</em> associated with transformation T<sub>3</sub>.</div></div>","PeriodicalId":23058,"journal":{"name":"Thermochimica Acta","volume":"742 ","pages":"Article 179897"},"PeriodicalIF":3.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658909","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

Study of the hydrothermal stability of leather tanned with vegetable extracts using an isometric method 用等距法研究用植物提取物鞣制的皮革的水热稳定性

IF 3.1 2区化学

Thermochimica Acta Pub Date : 2024-11-02 DOI: 10.1016/j.tca.2024.179893

Josep Maria Morera , Esther Bartolí , Bernat Esteban

引用次数: 0

Investigation on the effect of carbon powder structural characteristics derived from ethylene decomposition on powder explosion 乙烯分解产生的碳粉结构特征对粉末爆炸影响的研究

IF 3.1 2区化学

Thermochimica Acta Pub Date : 2024-11-02 DOI: 10.1016/j.tca.2024.179895

Yao Chen , Zhichen Zhang , Yunfeng Zhu , Yahui Li , Shoutao Ma , Haowen Chen , Jie Jiang , Bing Sun , Wei Xu

{"title":"Investigation on the effect of carbon powder structural characteristics derived from ethylene decomposition on powder explosion","authors":"Yao Chen , Zhichen Zhang , Yunfeng Zhu , Yahui Li , Shoutao Ma , Haowen Chen , Jie Jiang , Bing Sun , Wei Xu","doi":"10.1016/j.tca.2024.179895","DOIUrl":"10.1016/j.tca.2024.179895","url":null,"abstract":"<div><div>In LDPE production, ethylene underwent polymerization under high temperature and pressure. However, the heat generated during polymerization could cause ethylene pyrolysis, leading to safety risks. More critically, the carbon powder produced could further decompose, posing additional hazards. This study examined the pyrolysis characteristics of high-pressure, high-temperature ethylene and the explosive behavior of the resulting carbon powder. The decomposition of ethylene was carried out under 80–200 °C and 80–200 MPa with the oxygen concentration of 1000–5000 ppm using ethylene explosive device, and the explosive testing of derived carbon powder was carried out in a 20 L sphere chamber under the powder concentration of 200 g/m<sup>3</sup>. It was found that higher initial ignition pressure, temperature, and oxygen concentration intensified ethylene pyrolysis. The size of resulting carbon powder ranged from 0.5 to 500 μm and fewer structural defects, leading to stronger explosive intensity due to a larger specific surface area and longer suspension time in the air. Conversely, carbon powder with larger particle sizes and more defects tended to agglomerate, reducing suspension time and explosion intensity. This research provided a theoretical foundation for understanding powder explosions caused by ethylene decomposition.</div></div>","PeriodicalId":23058,"journal":{"name":"Thermochimica Acta","volume":"742 ","pages":"Article 179895"},"PeriodicalIF":3.1,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142586441","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

Characterization of thermal behavior of two types of kaolin in China by ultrafast Joule heating combined with XRD, FT-IR, TG-DSC and SEM 利用超快焦耳加热结合 XRD、FT-IR、TG-DSC 和 SEM 对中国两种高岭土的热行为进行表征

IF 3.1 2区化学

Thermochimica Acta Pub Date : 2024-11-02 DOI: 10.1016/j.tca.2024.179894

Jiahang Fan, Xianjie Liu, Mingyong Liu, Mengyao Yang, Yuena Jiang, Ruiyu Mi, Xin Min, Zhaohui Huang

引用次数: 0

Extending the Transient Plane Source Scanning method for determining the specific heat capacity of low thermal conductivity materials through a numerical study 通过数值研究扩展用于确定低导热材料比热容的瞬态平面源扫描方法

IF 3.1 2区化学

Thermochimica Acta Pub Date : 2024-10-28 DOI: 10.1016/j.tca.2024.179883

Zijin Zeng , Christian Müller , Besira Mihiretie

{"title":"Extending the Transient Plane Source Scanning method for determining the specific heat capacity of low thermal conductivity materials through a numerical study","authors":"Zijin Zeng , Christian Müller , Besira Mihiretie","doi":"10.1016/j.tca.2024.179883","DOIUrl":"10.1016/j.tca.2024.179883","url":null,"abstract":"<div><div>In contrast to the conventional Transient Plane Source (TPS) method, the Transient Plane Source Scanning (TPSS) technique allows for the direct determination of the specific heat capacity and requires the use of a specially designed sample holder for accurate measurements. While this method correctly determines the specific heat capacity of samples with moderate and high thermal conductivity, it tends to underestimate the values for those with low thermal conductivity. This paper demonstrates that the underestimated specific heat capacity results from heat loss during the measurement process. To precisely quantify the heat loss, a numerical model based on the finite element method was developed, with key material properties tuned based on measurement data. This model can closely describe the curve of measured thermal response, thereby enabling the precise determination of the specific heat capacity. Consequently, this study introduces a novel approach that incorporates numerical simulation to enhance TPSS measurements of poorly conducting samples, providing a reliable alternative for determining the specific heat capacity.</div></div>","PeriodicalId":23058,"journal":{"name":"Thermochimica Acta","volume":"742 ","pages":"Article 179883"},"PeriodicalIF":3.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593865","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

Determination of the apparent activation energy surface from isothermal data of char combustion and gasification 根据炭燃烧和气化的等温数据确定表观活化能面

IF 3.1 2区化学

Thermochimica Acta Pub Date : 2024-10-26 DOI: 10.1016/j.tca.2024.179892

Yongmyong Ri , Tokhui Ri , Hochol Rim , Hyonung Rim , Juhyon Yu , Yongho Kim , Jinhyok Ri

引用次数: 0

Heat capacities and thermodynamic functions of three 1-benzyl-4-aryl-1H-1,2,3-triazoles in the temperature range of (0 – Tm) K 三种 1-苄基-4-芳基-1H-1,2,3-三唑在 (0 - Tm) K 温度范围内的热容量和热力学函数

IF 3.1 2区化学

Thermochimica Acta Pub Date : 2024-10-23 DOI: 10.1016/j.tca.2024.179881

Y.N. Yurkshtovich , A.V. Blokhin , A.G. Labetski , D.I. Shiman , A.A. Notfullin , M.I. Yagofarov

{"title":"Heat capacities and thermodynamic functions of three 1-benzyl-4-aryl-1H-1,2,3-triazoles in the temperature range of (0 – Tm) K","authors":"Y.N. Yurkshtovich , A.V. Blokhin , A.G. Labetski , D.I. Shiman , A.A. Notfullin , M.I. Yagofarov","doi":"10.1016/j.tca.2024.179881","DOIUrl":"10.1016/j.tca.2024.179881","url":null,"abstract":"<div><div>In this paper, we present the results of comprehensive thermodynamic study of some functionally substituted triazoles such as 1-benzyl-4-phenyl-1<em>H</em>-1,2,3-triazole, 1-benzyl-4-(<em>m</em>-tolyl)-1<em>H</em>-1,2,3-triazole and 1-benzyl-4-(4‑<em>tert</em>-butylphenyl)-1<em>H</em>-1,2,3-triazole. The temperature dependences of heat capacities of 1-benzyl-4-(<em>m</em>-tolyl)-1<em>H</em>-1,2,3-triazole and 1-benzyl-4-(4‑<em>tert</em>-butylphenyl)-1<em>H</em>-1,2,3-triazole were measured in a wide temperature range of ∼(5 – 370) K using the adiabatic calorimetry. Those of 1-benzyl-4-phenyl-1<em>H</em>-1,2,3-triazole were determined at the range of ∼(5 – 80) K, supplementing the previous measurements at the more elevated temperatures. The melting parameters and thermal stability (melting temperature, enthalpy of fusion, temperature of thermal destruction) of the compounds were determined using the differential scanning calorimetry. Also, the standard thermodynamic functions (absolute entropies, reduced enthalpies and Gibbs energies) were calculated in the temperature range of (0 – <em>T</em><sub>m</sub>) K.</div></div>","PeriodicalId":23058,"journal":{"name":"Thermochimica Acta","volume":"742 ","pages":"Article 179881"},"PeriodicalIF":3.1,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142586448","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

Study of Heavy Oil In-situ Combustion with Copper Biocatalysts: Kinetics and Thermodynamic Aspects of High-Temperature Oxidation Reactions 利用铜生物催化剂研究重油原位燃烧：高温氧化反应的动力学和热力学问题

IF 3.1 2区化学

Thermochimica Acta Pub Date : 2024-10-22 DOI: 10.1016/j.tca.2024.179882

Mohamed-Said Chemam, Younes Djouadi, Chaima Khelkhal, Olga V. Ostolopovskaya, Mohammed Amine Khelkhal, Alexey V. Vakhin

{"title":"Study of Heavy Oil In-situ Combustion with Copper Biocatalysts: Kinetics and Thermodynamic Aspects of High-Temperature Oxidation Reactions","authors":"Mohamed-Said Chemam, Younes Djouadi, Chaima Khelkhal, Olga V. Ostolopovskaya, Mohammed Amine Khelkhal, Alexey V. Vakhin","doi":"10.1016/j.tca.2024.179882","DOIUrl":"10.1016/j.tca.2024.179882","url":null,"abstract":"<div><div>In-situ combustion is considered an efficient thermally enhanced oil recovery method. However, the combustion front stabilization remains a challenge for the scientific community. The present study examines the efficacy of copper tall oil (Cu-TO) and copper sunflower oil (Cu-SFO) on heavy oil high-temperature oxidation reactions, which are believed to solve this challenge. We applied non-isothermal differential scanning calorimetry (DSC) analyses combined with an isoconversional kinetic approach in order to calculate kinetic parameters, thermodynamic functions, and the effective rate constant of these reactions. The obtained results demonstrated that both catalysts are able to reduce the activation energies and shift oxidation regions to lower temperatures, with Cu-SFO showing superior performance. Kinetic predictions further supported these findings and revealed that the selected catalysts contributed significantly to decreasing oxidation times across all conversion ranges. Additionally, thermodynamic analyses indicated that Cu-SFO facilitated a more ordered and energetically favorable oxidation process, as demonstrated by increasingly negative entropy values and consistently lower Gibbs free energy. The research highlights the Cu-SFO catalyst exceptional ability to accelerate the transition from low-temperature to high-temperature oxidation while maintaining high catalytic activity. Taken together all these results, this research work contributes to provide comprehensive insights from the kinetic and thermodynamic analysis that reveal unique catalytic effects and reaction mechanisms, presenting an approach to stabilize combustion front and improve heavy oil recovery efficiency, addressing a critical challenge in the field of in-situ combustion.</div></div>","PeriodicalId":23058,"journal":{"name":"Thermochimica Acta","volume":"742 ","pages":"Article 179882"},"PeriodicalIF":3.1,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554095","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