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研究生:沈振良
研究生(外文):Shen, jan-leaom
論文名稱:以氧化鉻觸媒焚化含氯有機物之研究
論文名稱(外文):Incineration of Chlorinated Organic Compounds on Chromium Oxide Catalyst
指導教授:劉 端 祺
指導教授(外文):Liu Tuan-Chi
學位類別:碩士
校院名稱:國立台灣工業技術學院
系所名稱:化學工程技術研究所
學門:工程學門
學類:化學工程學類
論文種類:學術論文
論文出版年:1997
畢業學年度:85
語文別:中文
論文頁數:90
中文關鍵詞:觸媒焚化氧化分解有機氯化物氧化鉻
外文關鍵詞:catalytic incinerationchlorinated organic compoundschromia
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本論文旨在探討以Cr2O3/Al2O3觸媒來分解二氯甲烷、氯仿、四氯化碳、
二氯乙烯、三氯乙烯及四氯乙烯之效應,主要探討的項目包括反應溫度對
上述含氯有機物之轉化率及產物分佈的影響、反應中加入水的效應、混合
多種反應物的影響、及觸媒活性衰退之現象及成因等。 觸媒以臨濕含
浸法製備,使用的儀器包括表面積及孔徑分析儀、化學分析電子能譜儀(
ESCA)、原子光譜吸收儀(AA)等,反應測試於一大氣壓下,以連續流動
方式進行,進料為含1000ppm 有機物之空氣,反應溫度為100 -500℃。
研究結果顯示,對於單碳含氯有機物,在相同反應條件下,其轉化率大小
順序是CCl4>CHCl3>CH2Cl2,反應物中的氯原子數愈多則轉化率愈大;
對於雙碳烯類含氯有機物,其轉化率大小順序是C2H2Cl2>C2HCl3>C2Cl4
,反應物中的氯原子數愈多則轉化率愈小,順序與單碳含氯有機物的情形
正好相反。觸媒焚化所生成之最終產物為CO2、HCl及Cl2,其分佈受溫度
及反應物種的影響很大。 在反應進料中加入水對CHCl3的轉化率並沒有
很大的影響,但會抑制Cl2的產生。 Cr2O3/Al2O3觸媒在分解CH2Cl2、
CHCl3及CCl4時的衰退情形不同,其快慢順序為CCl4>CHCl3>CH2Cl2。經
檢測反應前後觸媒中的鉻含量發現,反應後的觸媒,其鉻含量較新鮮觸媒
減少很多,氧化鉻的流失應是造成觸媒失活的主要原因。

The decompositions of dichloromethane, chloroform
tetrachloride, dichloroethylene, chloridetrichloroethylene, and
tetrachloroethylene on Cr2O3/γ-Al2O3 catalyst were
investigated. The major interests of this research were placed
on knowing the conversion and the product distribution of the
decomposition. The effects of water and a second organics in the
feed were investigated. The cause of catalyst deactivation was
also examined. Catalysts were prepared by incipient wetness
impregnation and were characterized by ESCA and AA. The
decomposition reaction was conducted under atmospheric pressure
with a continuous flow tubular reactor. The feeding air
contained 1000 ppm organics. The reaction temperatures were
ranged from 100℃to 500℃. Under the same reaction condition,
the conversions of one -carbon organics decreased in the
following order : CCl4>CHCl3>CH2Cl2. The order showed the
conversion was proportional to the number of chlorine atom in
the compound. For organics of 2-carbons, the order was C2H2Cl2>
C2HCl3>C2Cl4. The conversion was decreased with the increase in
the number of chlorine atom CO2, HCl, and Cl2 were the major
products form the decomposition. The distribution of the
products was strongly affected by the reaction temperature and
the type of reactants to be decomposed Even though the
conversion of CHCl3 was not effected , the product distribution
was greatly influenced by the presence of water . The water
significantly inhibited the formation of Cl2. In decomposing
CH2Cl2, CHCl3, and CCl4, the rate of Cr2O3/γ-Al2O3 catalyst
deactivaton was in the order : CCl4>CHCl3>CH2Cl2. The loss of
Cr2O3 from Cr2O3/γ-Al2O3 was the main cause of catalyst
deactivation.

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