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智利南部木质纤维素生物质的热解：等转化率动力学分析及热解产物分布

Pyrolysis of Chilean Southern Lignocellulosic Biomasses: Isoconversional Kinetics Analysis and Pyrolytic Products Distribution.

作者信息

Cerda-Barrera Cristian, Fernández-Andrade Kevin J, Alejandro-Martín Serguei

机构信息

Department of Industrial Processes, Universidad Católica de Temuco, Temuco 4780000, Chile.

Laboratory of Gas Chromatography and Analytical Pyrolysis, Universidad del Bío-Bío, Concepción 4030000, Chile.

出版信息

Polymers (Basel). 2023 Jun 16;15(12):2698. doi: 10.3390/polym15122698.

DOI:10.3390/polym15122698
PMID:37376344
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10302438/
Abstract

Biomass provides potential benefits for obtaining value-added compounds instead of straight burning; as Chile has forestry potential that supports such benefits, it is crucial to understand the biomasses' properties and their thermochemical behaviour. This research presents a kinetic analysis of thermogravimetry, and pyrolysis of representative species in the biomass of southern Chile, heating biomasses at 5 to 40 °C·min rates before being subjected to thermal volatilisation. The activation energy (Ea) was calculated from conversion using model-free methods (Flynn-Wall-Ozawa (FWO), Kissinger-Akahira-Sunose (KAS), and Friedman (FR)), as well as the Kissinger method based on the maximum reaction rate. The average Ea varied between KAS 117 and 171 kJ·mol, FWO 120-170 kJ·mol, and FR 115-194 kJ·mol for the five biomasses used. (PR) was identified as the most suited wood for producing value-added goods based on the Ea profile for the conversion (α), along with (EN) for its high value of reaction constant (k). Each biomass demonstrated accelerated decomposition (an increase in k relative to α). The highest concentration of bio-oil containing phenolic, ketonic, and furanic compounds was produced by the forestry exploitation biomasses PR and EN, demonstrating the viability of these materials for thermoconversion processes.

摘要

生物质能提供获取增值化合物而非直接燃烧的潜在益处；鉴于智利拥有支持此类益处的林业潜力，了解生物质的特性及其热化学行为至关重要。本研究对智利南部生物质中代表性物种的热重分析和热解进行了动力学分析，在进行热挥发之前，以5至40℃·min的速率加热生物质。使用无模型方法（弗林-沃尔-小泽（FWO）、基辛格-赤平-ose（KAS）和弗里德曼（FR））以及基于最大反应速率的基辛格方法，根据转化率计算活化能（Ea）。对于所使用的五种生物质，平均Ea在KAS 117至171 kJ·mol、FWO 120 - 170 kJ·mol和FR 115 - 194 kJ·mol之间变化。根据转化率（α）的Ea曲线，（PR）被确定为最适合生产增值产品的木材，（EN）因其高反应常数（k）值也适合。每种生物质都表现出加速分解（相对于α，k增加）。林业采伐生物质PR和EN产生了含有酚类、酮类和呋喃类化合物的生物油最高浓度，证明了这些材料用于热转化过程的可行性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/d5d14790b363/polymers-15-02698-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/6bbc411b0f7d/polymers-15-02698-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/3c26b68cdef0/polymers-15-02698-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/29aa2f77cc1b/polymers-15-02698-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/2b1513b558a0/polymers-15-02698-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/9a313aa584ad/polymers-15-02698-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/33817925cbed/polymers-15-02698-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/29c5203e9504/polymers-15-02698-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/3afee96bf0ec/polymers-15-02698-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/747046d1f32f/polymers-15-02698-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/d5d14790b363/polymers-15-02698-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/6bbc411b0f7d/polymers-15-02698-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/3c26b68cdef0/polymers-15-02698-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/29aa2f77cc1b/polymers-15-02698-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/2b1513b558a0/polymers-15-02698-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/9a313aa584ad/polymers-15-02698-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/33817925cbed/polymers-15-02698-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/29c5203e9504/polymers-15-02698-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/3afee96bf0ec/polymers-15-02698-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/747046d1f32f/polymers-15-02698-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db6d/10302438/d5d14790b363/polymers-15-02698-g010.jpg

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