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| 題 名 | 廢咖啡渣衍生奈米碳材技術開發與CO₂吸附之應用=Synthesis and CO₂ Adsorption of Carbon Nanomaterials Derived from Spent Coffee Grounds |
|---|---|
| 作 者 | 江右君; 高緯倫; 葉俊麟; | 書刊名 | 燃燒季刊 |
| 卷 期 | 33:3=126 2024.08[民113.08] |
| 頁 次 | 頁15-26 |
| 分類號 | 445.97 |
| 關鍵詞 | 廢咖啡渣; 生物炭; 微波合成; 奈米碳材; 二氧化碳; 吸附; Spent coffee grounds; Biochar; Microwave synthesis; Carbon-based nanomaterials; Carbon dioxide; Adsorption; |
| 語 文 | 中文(Chinese) |
| DOI | 10.30041/CQ.202408_(126).0002 |
| 中文摘要 | 本研究將廢咖啡渣予以資源化合成奈米碳材,達到減廢、 再利用之循環經濟的目標。所收集之廢咖啡渣先經過水熱前 處理,接著予以裂解碳化、生成生物炭,再利用微波合成法 研製奈米碳材(Carbon-based nanomaterials, CNMs)。探討其 材料特性,並評估對 CO2 之吸附效能。研究發現所合成之 CNMs 為奈米薄層,甚至可觀察到石墨烯結構。樣本具微孔 性,微孔比例高達 80 ~ 90 %。資源化產品中的 N 含量比例 均高於原廢咖啡渣,推測其含 N 官能基團在資源化產品中 之鍵結較穩定,應有利於 CO2 之吸附。CNMs 樣本對 CO2 的等溫吸附量,在 0 o C、1 atm 和 0.15 atm 下,分別可達 3.01 和 1.62 mmol/g。影響 CNMs 之 CO2 吸附效能的關鍵參數為 碳化溫度,反之碳化時間的影響幾乎可忽略。微孔性和穩定 的含 N 官能基團可能是 CNMs 吸附 CO2 之關鍵特性。本研 究亦發現,常見的等溫吸附模式中以 Langmuir-Freundlich 模 式最適合描述 CNMs 在 0 °C 下的 CO2 吸附行為;而 Freundlich 模式則較適合描述 25 和 55 °C 的吸附數據。 |
| 英文摘要 | This study collected the spent coffee grounds (SCGs) and transformed into high-valued products. The collected SCGs was pre-treated using a hydrothermal method, next the samples were carbonized as biochars, and then the carbon-based nanomaterials (CNMs) were synthesized using the microwave synthesis process. Their properties were characterized and their CO2 adsorption performance was evaluated. The results showed that the obtained CNMs were nanoplanars, even sometimes graphene structures were observed. The products were microporous with a microporosity of 80 ~ 90 %. The N contents in biochars or CNMs were higher than that in SCGs, which implied that the Nfunctionalities in the biochars or CNMs were more stable due to stronger bonds. It is believed that this would be beneficial to the CO2 adsorption. The CO2 uptakes at 0 °C on the CNMs achieved to 3.01 (1 atm) and 1.62 (0.15 atm) mmol/g. The crucial parameter on CO2 adsorption were carbonization temperature, rather than carbonization time. The good CO2 uptakes could be attributed to the high microporosity and the stable Nfunctionalities. This study also observed that the LangmuirFreundlich model worked well for data fitting on the experimental data collected at 0 °C, while the Freundlich model was the optimal equation for the experimental data collected at 25 and 55 °C. |
本系統中英文摘要資訊取自各篇刊載內容。