Evaluation of char properties from co-pyrolysis of biomass/plastics: Effect of different types of plastics

IF 6.9 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL

Process Safety and Environmental Protection Pub Date : 2024-11-05 DOI:10.1016/j.psep.2024.11.009

He Chen, Luiz A.O. Rocha, Houlei Zhang, Yuanquan Xiong, Shuping Zhang

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引用次数: 0

Abstract

Co-pyrolysis of biomass/plastics is a viable method to obtain high-quality carbon materials. The synergistic effect in the char production process of co-pyrolysis of biomass/plastics affects the properties of the obtained char. However, the synergistic effect research on the char production process of co-pyrolysis of biomass/plastics is facing challenges owing to highly varying composition of different plastics. In this study, the synergistic effect during co-pyrolysis of bamboo (BM) and plastics (polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET), polycarbonate (PC), and polybutylene terephthalate (PBT)) was investigated. TG results showed that PP, PS, PET, and PBT promoted the release of biomass volatiles and increased co-pyrolysis char yield. Notably, the O-aromatic structure in PC underwent cleavage and deoxygenation reactions, inhibiting the production of co-pyrolysis char during co-pyrolysis process. Char yield from co-pyrolysis process decreased from 24.80 % for bamboo pyrolysis to 15.74 % for co-pyrolysis of bamboo/PC. The results of physicochemical tests on char samples indicated that the addition of polyhydrocarbon plastics (PP and PS) increased H/C ratio, O/C ratio, heating value and oxidative reactivity of the char compared to bamboo char due to the vapor deposition of hydrocarbons derived from thermal decomposition of plastics on the biomass char. While, co-pyrolysis of biomass and polyester plastics (PET, PC, PBT) improved the pore structure of char and increased oxygen content.

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评估生物质/塑料共热解产生的炭特性：不同类型塑料的影响

生物质/塑料共热解是一种获得高质量碳材料的可行方法。生物质/塑料共热解制炭过程中的协同效应会影响所得炭的性能。然而，由于不同塑料的成分差异很大，生物质/塑料共热解制炭过程的协同效应研究面临挑战。本研究调查了竹子（BM）和塑料（聚丙烯（PP）、聚苯乙烯（PS）、聚对苯二甲酸乙二醇酯（PET）、聚碳酸酯（PC）和聚对苯二甲酸丁二醇酯（PBT））共热解过程中的协同效应。TG 结果表明，聚丙烯（PP）、聚苯乙烯（PS）、聚对苯二甲酸乙二醇酯（PET）和聚对苯二甲酸丁二醇酯（PBT）促进了生物质挥发物的释放，并提高了共热解炭的产量。值得注意的是，在共热解过程中，PC 中的 O-芳香族结构会发生裂解和脱氧反应，从而抑制共热解炭的生成。共热解过程的炭产量从竹材热解的 24.80% 降至竹材/PC 共热解的 15.74%。炭样品的理化测试结果表明，与竹炭相比，添加聚烃塑料（PP 和 PS）会增加炭的 H/C 比、O/C 比、热值和氧化反应性，这是由于塑料热分解产生的碳氢化合物蒸发沉积在生物质炭上。而生物质和聚酯塑料（PET、PC、PBT）的共热解则改善了炭的孔隙结构，增加了氧含量。

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来源期刊

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.