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本研究探討溼度因子對於臭氧化程序的尾氣使用觸媒分解方式分解臭
氧反應的影響。研究中使用固定床反應器以進行不同相對溼度、反應溫度
（288~323 K）及空間速度（24,000~44,000 1/hr）的試驗。研究結果顯
示使用Pt-γAl2O3（Dash 220）觸媒以分解進口濃度0.15~0.19 mol/m^3
）之臭氧，於觸媒接觸時間約0.15 sec（空間速度約24,000 1/hr）及反
應溫度308 K（35℃）時，在相對溼度約90 %僅可得到近65 %的臭氧分解
率。而無水氣存在時，同樣的進口臭氧濃度、觸媒接觸時間及反應溫度，
其臭氧分解率卻高達97%（鄭, 1996）。由此可得知當反應中有水氣存在
時，會降低觸媒的臭氧分解率。反應動力模式的探討顯示有水氣存在的臭
氧觸媒分解反應仍可適切地以一階反應速率式描述。並且求得Pt-γAl2O3
（Dash 220）觸媒在有水氣存在的情況下，分解臭氧反應的活化能
為19.32 kJ/mol，頻率因子為0.0041 mol/(s g-catalyst(mol/m^3))。
The catalytic decomposition of ozone with water vapor was
investigated byusing a fixed-bed reactor. The experiments were
carried out at various constant reaction temperatures ( 288~323
K ), space velocities ( 24,000~44,000 1/hr) and relative
humidities. About 65 % decomposition efficiency of ozone with
inlet concentrationsof 0.15~0.19 mol/m^3 was achieved at a
catalyst contact timeof 0.15 sec (space velocity of about 24,000
1/hr ), a reaction temperature of308 K andrelative humiditie of
about 90 % for Pt-γAl2O3 ( symbolized as Dash220 ) catalyst.
However, about 97 % decomposition efficiency of ozone without
water vapor can beachieved at the same reaction conditions. The
results indicated that Dash 220 catalyst with the presence of
water vapor gave lowerperformance of ozone decomposition than
without the presence of water vapor atthe same reaction
conditions. For the reaction kinetics, it was found that the
first-order chemical reaction rate equation was appropriate
forthe catalytic decomposition of ozone with water vapor
investigated in this study.The apparent activation energy for
the decomposition reaction ofozone usingDash 220 catalyst with
water vapor is 19.32 kJ/mol. The corresponding pre-exponential
factor is 0.0041 mol/(s g-catalyst (mol/m^3)).
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