第五章 結論與建議
5.2 建議
1.除了金屬銅觸媒以外,氧化銀、氧化鉻、氧化汞等金屬觸媒亦是吸附 氫化物系氣體的活性成份物種,各物種與沸石擔體結合後之吸附效能 及吸附容量可以做進一步探討。
2.吸附完後之吸附劑再通入空氣,會發生氧化反應且氧化過程會放熱,
可以藉由量測吸附劑反應溫度變化,探討溫度高低與吸附效率或吸附
容量的關係。
3.藉由改變吸附劑填充量,或由吸附濃度變化曲線圖,來推估吸附帶寬 度,研究上不但可以節省測試時間,並且可以減少吸附劑的使用量。
4.吸附測試往往會有壓降問題產生,Cu/Y zeolite 吸附劑比 Cu/ZSM-5 zeolite 吸附劑容易產生壓降,即使在相同條件測試下所產生的壓降大 小亦有些微不同,影響實驗重複性,未來可以繼續探究降低壓降的方 法或找出更理想的實驗操作參數。
5.未來可以進行硝酸銅溶液減量測試,即在維持相同含浸濃度下逐量減 少硝酸銅溶液之總體積,或是重複使用硝酸銅溶液,在銅真正披覆量 未大量減少之前,可以藉此減少硝酸銅藥品使用量,降低成本。
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附錄
本研究曾考量經濟成本因素,選用單位價格較便宜的NaY型沸石 (Davison, USA),進行PH3氣體吸附容量測試,但測試過程中發現,
Cu/NaY zeolite吸附劑吸附時產生之壓降很大,且吸附容量受到壓降影響 甚距,導致重複性不佳,因此將其測試結果以圖方式呈現於附錄。
0 1 2 3 4
Conc. of Cu(NO3)2
(mole/ L)5 0
5 10 15 20 25 30 35 40 45 50
A d so rp ti o n ca p a ci ty
(mgPH 3/g ads.)附錄圖1: 在不同含浸濃度下,Cu/NaY zeolite吸附劑對PH3氣體的吸附容 量圖