Peng Zhang, Cai Liang, Xiaoping Chen, Daoyin Liu, Jiliang Ma
{"title":"微波加热模式对可持续地将塑料废物分解成氢气的启示","authors":"Peng Zhang, Cai Liang, Xiaoping Chen, Daoyin Liu, Jiliang Ma","doi":"10.1016/j.applthermaleng.2024.124954","DOIUrl":null,"url":null,"abstract":"<div><div>The manufacture of sustainable fuels from renewable resources has become a prospective technology towards the waste-to-resource concept. In this paper, the rapid microwave-driven method was proposed, and two microwave heating patterns of volumetric heating and localized heating were revealed through experimental and numerical methods. On the one hand, the microwave energy was consumed and transformed into heat volumetrically via dielectric loss and magnetic loss. The temperature distribution inside the particle was consistent with the microwave power dissipation density, simultaneously influenced by the electric field and magnetic field. On the other hand, a considerable portion of microwave energy in the multiparticle system was expended by local plasma discharging with massive heat bursts. The temperature enhancement of about 3 times was achieved by the microwave plasma, indicating the intensified conversion of microwave energy. This localized heating pattern induced the concentrated hotspot and led to the radical temperature rise inwards with a temperature gradient of over 180 °C·s<sup>−1</sup>. The coupling of volumetric heating by dissipation and localized heating by plasma facilitated the distinctive and efficient performance of plastic decomposition with the H<sub>2</sub> yield of 280 mmol·g<sup>−1</sup>H<sub>plastic</sub>. Altogether, this work promoted the insight into the microwave heating patterns and temperature distribution, which provided guidance for the further optimization of microwave catalysts for efficient and sustainable valorization.</div></div>","PeriodicalId":8201,"journal":{"name":"Applied Thermal Engineering","volume":"260 ","pages":"Article 124954"},"PeriodicalIF":6.1000,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Insight into microwave heating patterns for sustainable decomposition of plastic wastes into hydrogen\",\"authors\":\"Peng Zhang, Cai Liang, Xiaoping Chen, Daoyin Liu, Jiliang Ma\",\"doi\":\"10.1016/j.applthermaleng.2024.124954\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The manufacture of sustainable fuels from renewable resources has become a prospective technology towards the waste-to-resource concept. In this paper, the rapid microwave-driven method was proposed, and two microwave heating patterns of volumetric heating and localized heating were revealed through experimental and numerical methods. On the one hand, the microwave energy was consumed and transformed into heat volumetrically via dielectric loss and magnetic loss. The temperature distribution inside the particle was consistent with the microwave power dissipation density, simultaneously influenced by the electric field and magnetic field. On the other hand, a considerable portion of microwave energy in the multiparticle system was expended by local plasma discharging with massive heat bursts. The temperature enhancement of about 3 times was achieved by the microwave plasma, indicating the intensified conversion of microwave energy. This localized heating pattern induced the concentrated hotspot and led to the radical temperature rise inwards with a temperature gradient of over 180 °C·s<sup>−1</sup>. The coupling of volumetric heating by dissipation and localized heating by plasma facilitated the distinctive and efficient performance of plastic decomposition with the H<sub>2</sub> yield of 280 mmol·g<sup>−1</sup>H<sub>plastic</sub>. Altogether, this work promoted the insight into the microwave heating patterns and temperature distribution, which provided guidance for the further optimization of microwave catalysts for efficient and sustainable valorization.</div></div>\",\"PeriodicalId\":8201,\"journal\":{\"name\":\"Applied Thermal Engineering\",\"volume\":\"260 \",\"pages\":\"Article 124954\"},\"PeriodicalIF\":6.1000,\"publicationDate\":\"2024-11-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Thermal Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S135943112402622X\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Thermal Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S135943112402622X","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
Insight into microwave heating patterns for sustainable decomposition of plastic wastes into hydrogen
The manufacture of sustainable fuels from renewable resources has become a prospective technology towards the waste-to-resource concept. In this paper, the rapid microwave-driven method was proposed, and two microwave heating patterns of volumetric heating and localized heating were revealed through experimental and numerical methods. On the one hand, the microwave energy was consumed and transformed into heat volumetrically via dielectric loss and magnetic loss. The temperature distribution inside the particle was consistent with the microwave power dissipation density, simultaneously influenced by the electric field and magnetic field. On the other hand, a considerable portion of microwave energy in the multiparticle system was expended by local plasma discharging with massive heat bursts. The temperature enhancement of about 3 times was achieved by the microwave plasma, indicating the intensified conversion of microwave energy. This localized heating pattern induced the concentrated hotspot and led to the radical temperature rise inwards with a temperature gradient of over 180 °C·s−1. The coupling of volumetric heating by dissipation and localized heating by plasma facilitated the distinctive and efficient performance of plastic decomposition with the H2 yield of 280 mmol·g−1Hplastic. Altogether, this work promoted the insight into the microwave heating patterns and temperature distribution, which provided guidance for the further optimization of microwave catalysts for efficient and sustainable valorization.
期刊介绍:
Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application.
The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.