Bo Chen , Sen Ma , Sachin Kumar , Zhitong Yao , Wanqi Feng , Jianbo Zhao , Xu Zhang , Di Cai , Hui Cao , Ian Watson
{"title":"Pyrolysis behaviour and kinetic analysis of waste polylactic acid composite reinforced with reed straw processing residue","authors":"Bo Chen , Sen Ma , Sachin Kumar , Zhitong Yao , Wanqi Feng , Jianbo Zhao , Xu Zhang , Di Cai , Hui Cao , Ian Watson","doi":"10.1016/j.crcon.2024.100226","DOIUrl":null,"url":null,"abstract":"<div><p>The lignocellulose reinforced composites are commonly used sustainable materials with good mechanical and physical properties.<!--> <!-->Aiming to properly dispose and recover the potential value of discarded lignocellulose reinforced composites, the pyrolysis behaviour and kinetics of reed straw processing residual/polylactic acid (RSPR/PLA) composites, a typical 3D printing<!--> <!-->material, was investigated. Based on the TG-FTIR results, the synergistic effects between RSPR and PLA during the pyrolysis process were clarified. Compared with the FTIR spectra of PLA, the absorption peaks of CO and CO<sub>2</sub> disappear in the FTIR spectra of RSPR/PLA composite, which indicates RSPR provides additional free radicals for the free radical reaction of PLA, and further promoting the decomposition. The apparent activation energy of the RSPR/PLA composite pyrolysis was calculated by two <em>iso</em>-conversional methods including Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS). The average <em>E<sub>a</sub></em> of the RSPR/PLA composite (122.6 kJ mol<sup>−1</sup> (FWO) and 117.9 kJ mol<sup>−1</sup> (KAS)) was lower than that of solo pyrolysis of RSPR (138.5 kJ mol<sup>−1</sup> (FWO) and 135.4 kJ mol<sup>−1</sup> (KAS)) and the pure PLA (197.0 kJ mol<sup>−1</sup> (FWO) and 196.6 kJ mol<sup>−1</sup> (KAS)). The master plot method results suggested the pyrolysis of RSPR/PLA composite followed the one-dimensional (D1) diffusion model. This work provides an environmentally friendly strategy to effective thermo-chemical upgrading of the value of discarded lignocellulose reinforced composite material.</p></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"7 3","pages":"Article 100226"},"PeriodicalIF":6.4000,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2588913324000152/pdfft?md5=463eede6a2aeb63abedffc09b1c0d2b8&pid=1-s2.0-S2588913324000152-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Carbon Resources Conversion","FirstCategoryId":"1089","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2588913324000152","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
The lignocellulose reinforced composites are commonly used sustainable materials with good mechanical and physical properties. Aiming to properly dispose and recover the potential value of discarded lignocellulose reinforced composites, the pyrolysis behaviour and kinetics of reed straw processing residual/polylactic acid (RSPR/PLA) composites, a typical 3D printing material, was investigated. Based on the TG-FTIR results, the synergistic effects between RSPR and PLA during the pyrolysis process were clarified. Compared with the FTIR spectra of PLA, the absorption peaks of CO and CO2 disappear in the FTIR spectra of RSPR/PLA composite, which indicates RSPR provides additional free radicals for the free radical reaction of PLA, and further promoting the decomposition. The apparent activation energy of the RSPR/PLA composite pyrolysis was calculated by two iso-conversional methods including Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS). The average Ea of the RSPR/PLA composite (122.6 kJ mol−1 (FWO) and 117.9 kJ mol−1 (KAS)) was lower than that of solo pyrolysis of RSPR (138.5 kJ mol−1 (FWO) and 135.4 kJ mol−1 (KAS)) and the pure PLA (197.0 kJ mol−1 (FWO) and 196.6 kJ mol−1 (KAS)). The master plot method results suggested the pyrolysis of RSPR/PLA composite followed the one-dimensional (D1) diffusion model. This work provides an environmentally friendly strategy to effective thermo-chemical upgrading of the value of discarded lignocellulose reinforced composite material.
期刊介绍:
Carbon Resources Conversion (CRC) publishes fundamental studies and industrial developments regarding relevant technologies aiming for the clean, efficient, value-added, and low-carbon utilization of carbon-containing resources as fuel for energy and as feedstock for materials or chemicals from, for example, fossil fuels, biomass, syngas, CO2, hydrocarbons, and organic wastes via physical, thermal, chemical, biological, and other technical methods. CRC also publishes scientific and engineering studies on resource characterization and pretreatment, carbon material innovation and production, clean technologies related to carbon resource conversion and utilization, and various process-supporting technologies, including on-line or off-line measurement and monitoring, modeling, simulations focused on safe and efficient process operation and control, and process and equipment optimization.