核桃壳和 Enteromorpha clathrate 共同热解过程中的协同热行为和动力学特性

IF 3 3区 工程技术 Q2 CHEMISTRY, ANALYTICAL
Zhuwei Liu, Lin Li, Rui Wang, Qing Dong, Zengguang Huang, Qiang Cheng
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引用次数: 0

摘要

本文使用热重分析仪(TGA)对核桃壳(WS)、Enteromorpha clathrata(EN)及其混合物(WEB)的非等温共热解进行了研究。热重分析确定了所有样品的三个不同分解阶段。在相同温度下,WEB 的质量损失始终稳定在 WS 和 EN 的值之间。此外,不同的加热速率会产生不同的 TG-DTG 曲线。随着温度的升高,WS 和 EN 之间的相互作用逐渐增强,当 WS 和 EN 的混合比例为 7:3 时,相互作用最为显著。采用 Kissinger-Akahira-Sunose (KAS)、Flynn-Wall-Ozawa (FWO) 和 masterplots 方法确定了动力学三元组。结果表明,对于不同的混合比例,当转化率为 0.2-0.8 时,WS 和 EN 共热解的有效活化能在 86.21 到 247.86 kJ mol-1 之间变化。最适合 70WS30EN 热解的机理为 g(α)=[-ln(1-α)]1/2 ,其动力学参数为:表观活化能 86.21 kJ mol-1,预指数 8.99 × 1016 s-1。本文的研究结果为进一步研究水生和陆生生物质的共热解提供了参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synergistic thermal behavior and kinetics in the co-pyrolysis of walnut shell and Enteromorpha clathrate

In this paper, the non-isothermal co-pyrolysis of walnut shell (WS), Enteromorpha clathrata (EN), and their blends (WEB) was studied using a thermogravimetric analyzer (TGA). For all the samples, three different decomposition stages were identified by the thermogravimetric analysis. At the same temperature, the mass loss of WEB was always stable between the values of WS and EN. In addition, different heating rates resulted in different TG–DTG profiles. The interaction between WS and EN showed a gradual enhancement with temperature increase, and the most significant interaction was generated when the blending proportion of WS and EN was 7:3. The Kissinger–Akahira–Sunose (KAS), Flynn–Wall–Ozawa (FWO), and masterplots methods were used to determine the kinetic triplets. The results show that for different blending ratios, the effective activation energies of WS and EN co-pyrolysis vary from 86.21 to 247.86 kJ mol−1 when the conversion rate is 0.2–0.8. The most appropriate mechanism for the pyrolysis of 70WS30EN is g(α)=[-ln(1-α)]1/2 with kinetic parameters: apparent activation energy 86.21 kJ mol-1 and pre-exponential factor 8.99 × 1016 s−1. The findings in this paper provide a reference for further research on the co-pyrolysis of aquatic and terrestrial biomass.

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来源期刊
CiteScore
8.50
自引率
9.10%
发文量
577
审稿时长
3.8 months
期刊介绍: Journal of Thermal Analysis and Calorimetry is a fully peer reviewed journal publishing high quality papers covering all aspects of thermal analysis, calorimetry, and experimental thermodynamics. The journal publishes regular and special issues in twelve issues every year. The following types of papers are published: Original Research Papers, Short Communications, Reviews, Modern Instruments, Events and Book reviews. The subjects covered are: thermogravimetry, derivative thermogravimetry, differential thermal analysis, thermodilatometry, differential scanning calorimetry of all types, non-scanning calorimetry of all types, thermometry, evolved gas analysis, thermomechanical analysis, emanation thermal analysis, thermal conductivity, multiple techniques, and miscellaneous thermal methods (including the combination of the thermal method with various instrumental techniques), theory and instrumentation for thermal analysis and calorimetry.
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