以雙氧水氧化法資源化含硫飛灰廢棄物

Recycling of Waste Ashes by Hydrogen Peroxide Oxidation

蔡平賜(P.S. Tsai) ； 王金印(K.I. Wang) ； 吳政毅(C.I. Wu) ； 謝耀勛(Y.S. Hsieh)

《鑛冶：中國鑛冶工程學會會刊》 56卷1期 (2012/03) Pp. 95-104

https://doi.org/10.30069/MM.201203.0008

摘要

以氫氧化鈉水溶液資源化廢觸媒時所衍生的二氧化硫，會產生含有硫酸鈉及亞硫酸鈉的含硫飛灰廢棄物。這些廢棄物大多採用不利於環境的掩埋方式處理。本篇提出以雙氧水為氧化劑資源化含硫飛灰廢棄物為硫酸鈉的成果。實驗先以水進行模擬飛灰及工廠飛灰的飽和液化程序，觀察兩種飛灰溶液靜置在不同溫度及時間下，所含硫酸鈉的比例變化；接著探討在不同溫度下添加雙氧水的氧化效果。實驗的數據顯示：模擬飛灰溶液在33℃～100℃的溫度、靜置時間1小時，其硫酸鈉的比例已達65％～68％，而工廠的飛灰溶液則高達86％～90％。添加雙氧水的結果也顯示，模擬飛灰溶液添加0.57ml雙氧水，即可獲得純度99％以上硫酸鈉產物；然而工廠飛灰溶液則需要添加至0.95ml，才可獲得高純度的硫酸鈉溶液。

關鍵字

雙氧水 ； 氧化法 ； 飛灰 ； 資源化 ； 硫酸鈉

並列摘要

Recycling sulfur dioxide (SO2) from waste catalyst will produce sulfur fly ash wastes (SFAW). Most of these wastes were buried underground that could be a cause for serious environment concern. In this study, we attempted to use hydrogen peroxide (H2O2) as an oxidant to recycle the SFAWs to purified sodium sulfate (NaSO4). Water was used to liquefy both simulated and factory SFAWs into saturated solutions. The proportions of sodium sulfate to SFAW in the both saturated solutions for varying experimental temperature and time were determined. Experimental results showed that at temperature of 33℃~100℃ and reaction time of 1 hour, the proportion of sodium sulfate to SFAW reached 65%~68% for simulated saturated solution and 86%~90% for the factory saturated solution. Adding 0.57ml of hydrogen peroxide in simulated saturated solution resulted in recycling purity of sodium sulfate above 99%. It required 0.95ml hydrogen peroxide in factory saturated solution to achieve the same purity.

並列關鍵字

hydrogen peroxide ； oxidation ； ash ； recycling ； sodium sulfate