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研究生:王俊智
研究生(外文):Wang, Chun-Chih
論文名稱:再生RFCC廢觸媒應用於VOCs污染控制研究
論文名稱(外文):RECYCLED SPENT RFCC CATAL YSIS AS VOCs ADSORBENTS
指導教授:王鴻博王鴻博引用關係
指導教授(外文):Wang haw paul
學位類別:碩士
校院名稱:國立成功大學
系所名稱:環境工程學系
學門:工程學門
學類:環境工程學類
論文種類:學術論文
論文出版年:1996
畢業學年度:84
語文別:中文
論文頁數:190
中文關鍵詞:廢觸媒資源化
外文關鍵詞:VOCs吸附
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摘要台灣地區每年廢棄約 4000 噸 RFCC 觸媒,這些重金屬 Ni 及 V 污
染之廢觸媒必須回收﹛B再利用,以達到工業減廢及提高經濟效益的目的
。 RFCC 觸媒約含20% zeolite Y 是三
度空間結構晶形物質,俱高熱穩定性及離子交換容量,表面積大,很適合
作為吸附材料,並且容易再生﹛B實驗結果顯示 RFCC 廢觸媒之鎳及釩重
金屬污染可以再生 RFCC 廢觸媒可使 RFCC 廢觸媒可使 RFCC 廢觸媒表面
Bronsted 活性基數目增加,草酸再生 RFCC 廢觸媒表面酸性活性基以
Lewis 酸為主﹛CFTIR 光譜顯示 VOCs (苯、甲苯﹛B二甲苯﹛B正己烷)優
先選擇吸附於 Zoelite Y 表面酸性較強的活性基(SiOHAI)上.再生廢觸
媒表面吸附之苯仍俱 D6h 對稱結構,係屬於物理性吸附。 再生
RFCC廢觸媒 VOCs 之吸附能力約為傳統活性碳吸附劑 1/6 ,但再生 RFCC
廢觸媒比重較大,而且再生容易,不但具經濟濟效益且符合減廢政策.關
鍵詞:VOCs 吸附,廢觸媒,資源化。

Handing or disposal of spent catalysts is an
important environmental issue. The petroleum refining
industries in Taiwan discard over 4,000 tons of spent FCC
(fluidized catalytic cracking) catalysts every year. Neigher
has there been any reuse or reprocessing outlet for these spent
catalysts. Spent FCC/ROC catalysts are essentially silica-
alumina materials that have becomecontaminated with heavy metals
during use, principally vanadium and nickel. Afeasibility study
for reuse of the spent FCC/ROC catalyst as VOCs adsorbents was
investigated. Experimental data indicate that the contaminated
metals vanadium and/ornickel on these spent catalysts can be
selectively removed by an oxalic (or sulfuric)acid solution with
the zeolite structure preserved. Diffuse reflectance infrared
spectrareveal that the VOCs such as benzene, toluene,
ethylbenzene, and xylene moleculesadsorb preferentially on the
zeolite surfaces of the FCC catalysts. The C-H stretching bands
of adsorbed benzene molecules are observed at 3040,3070 and 3090
cm-1.Evidently, the adsorbed benzene molecule is only slightly
perturbed from the D6hselection rule for the free molecule.
This is confirmed by the fact that surface-induced infrared
absorptions are not seen when the benzene molecules are adsorbed
on thesurvace sites. Typically, an adsorbed molecule
experiences a decrease in symmetrywith resulting induced
infrared absorptions. Furthermore, the infrared
differencespectra also shows that benzene molecules have a high
selectivity for adsorption on theenergetic acid sites first.
Exxentially, the bands at 3740 cm-1 (SiOH) decreases in
intensity while bands of adsorbed benaene are observed to
increase. This suggests that benzene molecules adsorb
preferentially on the zeolite surfaces of the RFCC catalysts.
Experimentally, the VOCs adsorption capability for a regenerated
FCC (or FOC)catalysts ia about 17% of a normal activatd carbon
adsorbent. However, it turns outto be economically attractive
when the regenerated FCC catalysts are used as VOCsadsorbents in
a commercial-scale VOCs adsorber.

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