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利用微波輔助熱解保鮮膜及稻稈回收能源∕資源 = Energy and resource recovery from plastic wrap waste and rice straw using microwave-assisted pyrolysis / 李怡萱.

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摘要註

隨著能源需求的增加與化石燃料帶來的環境衝擊,開發具永續性與低碳排放的替代能源已成為重要課題。本研究以微波輔助熱裂解技術處理農業廢棄物稻稈(RS)與聚乙烯(PE)材質保鮮膜,探討單獨裂解與共裂解條件下氣相與液相產物之特性及反應機制。結果顯示,單獨稻稈裂解主要產生 H₂(約 30 vol%)與 CO(約 35 vol%),並伴隨 CO₂(約 15 vol%)的生成,顯示含氧官能基經脫羧與脫羰反應轉化為氣體釋出,此外裂解油中含氧比例亦高達約 95 wt% 。當稻稈與 PE 以 1:3 比例共裂解時,CO 與 CO₂ 含量顯著下降,裂解油含氧量降至 6.26% ~ 15.49 %,顯示氧元素已大量轉化為其他有機氣相氧化物釋出,裂解油品質明顯提升。綜合而言,微波輔助共熱解不僅能有效提升液相產物品質與能源價值,亦具備促進可燃性氣體生成與減少廢棄物體積的潛力,展現其在資源回收與循環經濟應用中的前景。. With increasing energy demand and the environmental impact of fossil fuels, the development of sustainable and low-carbon alternative energy sources has become a critical issue. This study used microwave-assisted pyrolysis technology to treat agricultural waste rice straw (RS) and polyethylene (PE) plastic wrap, investigating the characteristics and reaction mechanisms of the gaseous and liquid products under both standalone and co-pyrolysis conditions. Results showed that standalone pyrolysis primarily produced H₂ (approximately 30 vol%) and CO (approximately 35 vol%), accompanied by CO₂ (approximately 15 vol%), indicating that oxygen-containing functional groups were converted to gases through decarboxylation and decarbonylation reactions. Furthermore, the oxygen content in the tar was as high as approximately 95 wt%. When co-pyrolysis of rice straw and PE was performed at a 1:3 ratio, the CO and CO₂ contents decreased significantly, and the oxygen content in the tar also dropped to 6.26%–15.49%, indicating that a significant amount of oxygen was converted to other organic gaseous oxides and released, significantly improving the quality of the tar. In summary, microwave-assisted co-pyrolysis can not only effectively improve the quality and energy value of liquid products, but also has the potential to promote the generation of combustible gases and reduce the volume of waste, showing its prospects in resource recovery and circular economy applications..

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