EPA-107-XB04

107

1,739 千元

補助及獎勵回收清除處理暨再生利用

2018/01/01

2018/11/30

席行正

回收基管會

蕭英琪

國立臺灣大學環境工程學研究所

大氣空氣、廢棄物管理

汞蒸氣吸附、含硫廢焦碳、動力吸附實驗分析

Mercury vapor adsorption, Waste oil sands coke, Adsorption kinetics

席行正

02-33664374#

hchsi@ntu.edu.tw

本研究主要目標包含：（1）商用活性碳取得與新穎除汞碳合成；（2）活性碳吸附實驗；以及（3）活性碳床吸附動力分析與吸附床設計/較適操作條件參數獲得。 　　本研究以油品廢棄之含硫廢焦碳作為活性碳之起始原料，合成出具有不同物化特性之含硫活性碳。結果顯示，含硫廢焦碳單位時間的活性碳產率隨著功率與活化時間提升而下降，而硫元素大部分都會因高功率微波而逸散掉。材料孔徑大多以微孔為主，微波化學活化的孔徑類型類似於傳統化學活化。但傳統化學活化的活性碳成品穩定性較微波化學活化高，因微波化學活化可在較短的時間內製備完成，因此該活化方式仍可有效應用於製備活性碳製程，且含硫廢焦碳其除汞效果與市售商用含硫活性碳相似，可做為廢棄物資源化之去向。 　　本研究針對2種商用除汞碳進行物化性及吸附比較，結果顯示商用含氯除汞碳對於氣相汞吸附成效較佳，商用含硫除汞碳其硫含量與自製含硫活性碳相近，然而吸附效果較差，其主因可能為含浸溫度上的不同導致其鍵結官能基不同，且比表面積較低亦為一可能因素。 　　市售商用含硫除汞碳其操作規範符合「廢電子電器暨廢資訊物品之抽氣櫃活性碳更換頻率審查原則」，後續可依據不同材料特性之除汞碳訂定相關規範，並提供業者遵循之依據。

汞蒸氣吸附、含硫廢焦碳、動力吸附實驗分析

液晶顯示器回收廠活性碳吸附塔設計與操作參數建置與微波開發新型除汞碳研究.pdf

7MB

2019/1/1 上午 12:00:00

The goals of this project are (1) acquiring commercial activated carbon (SAC) and preparing novel Hg adsorbent, (2) performing Hg adsorption tests, and (3) conducting kinetic analysis of Hg adsorption breakthrough curves and obtaining designing parameters and suitable operating parameters of Hg adsorber. To prepare novel Hg adsorbent, a high-sulfur containing char named waste oil sands coke, from oil refinery processes, was selected as the precursor to produce activated carbon via microwave-assisted activation. The experimental results showed that the production yield of activated carbon decreased as the power level or activation time increased. The inherent sulfur contents of activated carbons mostly escaped during the microwave chemical activation process. In contrast to conventional chemical activation, the duration of microwave chemical activation was relatively short. The pores of activated carbons from conventional chemical activation are micropores, similar to those from microwave chemical activation. Microwave chemical activation is a time-effective methodology to prepare activated carbon. However, the properties of activated carbons from microwave activation would be more unstable and unpredictable compared with conventional chemical activation. The adsorption efficiency of the coke-made activated carbon is similar to commercial SAC. Therefore, the novel adsorbent has the potential for commercializing. Additionally, we compared two kinds of commercial activated carbons which are used for adsorbing mercury vapor. The results showed that the adsorption efficiency of commercial chlorine-impregnated activated carbon was greater than that of sulfur-impregnated activated carbon. Though the amount of sulfur content in commercial SAC was similar to the lab-synthesized SAC, the adsorption efficiency of commercial SAC was smaller than that of the other. This result may be due to the diversity of functional groups by different impregnation temperature conducted and the decrease in surface area. The operation specification of commercial SAC is in accordance with the current standard for replacement frequency of Hg-removal activated carbon for the vent hood system used for recycling of waste electrical and electronic equipment. Based on the characteristics of different activated carbons examined in this study, the current specifications could be modified based on the properties of activated carbon used.

Mercury vapor adsorption, Waste oil sands coke, Adsorption kinetics