磁性奈米顆粒磁分離技術之研究

生質能源技術具有再利用與乾淨能源生產等優點，符合永續發展之需求，在生質能源發酵反應過程中，會使用磁性奈米顆粒表面搭載酵素，減少反應時間。本論文以外加電磁場方式，回收磁性奈米顆粒。依不同實驗參數進行分離磁性奈米顆粒回收實驗，對於不同顆粒添加量、攪拌轉速、顆粒粒徑、不同電磁場位置等參數下評估、探討系統操作變數對於磁性顆粒分離效率之影響，以期能將所得之資訊應用於日後相關設計、操作之參考。各參數因子分別為：不同顆粒添加量：5.000g、10.000g、20.000g；攪拌轉速：50rpm、70rpm；顆粒粒徑：5-20nm、50-100nm；不同電磁場位置：12全上、6上6下。實驗結果為分離率會因磁性奈米顆粒添加量的增加而下降；加入5.000g時，能得到最高約80%的分離率；轉速由50rpm調升至70rpm時，分離率有上升趨勢；不同磁場位置也呈現粒徑5-20nm，分離率皆大於粒徑50-100nm，最大的分離率落差可以到達26.29%；再依不同粒徑與轉速下，不同磁場位置的分離率差異平均可到4.51%。最後將建立磁性分離裝置之分離模式並探討其分離機制，所得之相關參數結果，可提供設計相關磁性奈米顆粒固液分離、回收及再利用等操作系統之參考。

關鍵字

磁分離；磁性奈米顆粒；實驗

並列摘要

Biomass energy technology allows the production of recyclable and cleaner energy, in line with the need of a sustainable development. The use of magnetic nano particle(MNP) surface mounted enzymes reduces the reaction time in the fermentation reaction process. This study employs the externally applied electromagnetic field as the method to recycle MNPs. MNPs are isolated using different parameters including different amount of particles, stirring speed, particle size, and position to access the effect of operating system variations on the MNP separation efficacy. The individual variables are: amount of particles (5.000g, 10.000g, 20.000g), stirring speed (50 rpm, 70 rpm), particle size (5-20 nm, 50-100 nm), and electromagnetic field position (all 12 on top, 6 on top and 6 under).The results are as following: separation rate is increased when the amount of MNPs decreases; Maximum separation rate of approximately 80% can be reached when 5.000g MNPs is used. The separation rate increases when speed is increased from 50 rpm to 70 rpm; MNPs with diameter of 5-10 nm has greater separation rate than those with diameter of 50-100 nm with a difference up to 26.29%; the separation rate in different magnetic field position has an average difference of 4.51% in accordance to each particle size and stirring speed. The establishment of influences of various parameters of magnetic separation device explores its separation mechanism. The results obtained can provide a reference for related design of MNP solid-liquid separation, recycling, and reuse in other operating systems.

並列關鍵字

magnetic separation ； magnetic nano-particles ； experiments

參考文獻

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磁性奈米顆粒磁分離技術之研究

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