應用改質吸附劑去除室內環境中甲醛之研究

Application of modified adsorbent on formaldehyde removal

馮慧蕙(Hui-Hui Feng)

指導教授 ： 王雅玢

中原大學/工學院/生物環境工程研究所/碩士(2013年)

https://doi.org/10.6840/cycu201301037

摘要

甲醛是一種無色、氣味強烈且有毒性的氣體，常溫下易揮發，為建築或裝潢材料內的添加劑，因此在室溫下容易揮發進在環境中，再藉由吸入進入人體，長期接觸會對人體造成及大的負擔，嚴重時甚至會致癌。目前去除甲醛主要是由吸附劑直接進行吸附，大部分屬於物理吸附，因此效果有限，所以為了提升吸附效果，通常會以胺類化合物改質吸附劑，使其表面帶有胺基官能團，可藉由化學吸附來吸附甲醛，且效果顯著。因此本研究利用胺類改質之吸附劑測試其去除甲醛之效果。
研究利用三種吸附劑(活性碳、沸石和二氧化鈦)，使用兩種胺類化合物(APTES和EDA)以含浸法改質活性碳和沸石，二氧化鈦則是使用兩種型態的二氧化鈦(TiO2和P25-TiO2)來進行吸附之測試，其測試條件有流速(250 ml/min、500 ml/min和1000 ml/min)、吸附劑劑量(0.5 g、1 g和2 g)以及甲醛濃度(0.5 ppm、1 ppm和2 ppm)的變化進行吸附測試，針對甲醛去除率之差異加以比較和討論，找出最佳吸附條件。結果顯示最佳去除甲醛的組合為使用1g EDA改質之沸石在低流速500 ml/min下吸附1 ppm甲醛30分鐘，其去除率可達98%。

關鍵字

胺類化合物改質 ； 含浸法 ； 甲醛 ； 活性碳 ； 沸石 ； 二氧化鈦

並列摘要

Formaldehyde (HCHO) is a colorless, odor and toxic gases and easy to volatilize. It usually included in the construction and decoration materials. After installation, it will volatilize into environment, enter human body by inhalation. Exposure in such environment for long-term would possibly cause serious health impact. Adsorption is always the main removal strategy for indoor environment, mostly was physical adsorption whose effect is limited. In order to increase HCHO removal efficiency, the adsorbent surface was modified by amine groups and the adsorption process was expected by chemical adsorption. Therefore, this study was aimed to evaluate the HCHO removal efficiency by the amine modified adsorbent.
Three kinds of adsorbent (activated carbon, zeolites and titanium dioxide) and two kinds of amine compound (APTES and EDA) were applied in this study to evaluate the effect of HCHO removal efficiency. The operational parameters included flow rate (250 ml/min, 500 ml/min and 1000 ml/min), adsorbent amounts (0.5 g, 1 g and 2 g) and HCHO concentrations (0.5 ppm, 1 ppm and 2 ppm). The best combination for HCHO removal efficiency is 1 g EDA modified zeolite, 1 ppm HCHO input and 500 ml/min of flow rate for 30 minutes to achieve 98% of HCHO removal efficiency.

並列關鍵字

amine groups ； titanium dioxide ； zeolites ； activated carbon ； formaldehyde

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