本研究以奈米級FeZSM-5及一系列改質FeZSM-5進行苯的直接氧化生成酚的研究，使用的氧化劑為笑氣，觸媒以四方面進行改質：添加銅、水蒸氣處理、水蒸氣加鹽酸處理、合成時添加奈米碳管。
本研究中所合成的各觸媒以不同儀器鑑定其性質，包括以XRD鑑定觸媒的結晶；以FESEM觀察FeZSM-5外型、以氮氣吸附分析觸媒表面積及微孔體積；以ICP-AES測量觸媒組成；以NH3-TPD了解觸媒酸性。
觸媒的活性在常壓300~550°C下利用流動反應器量測，測量時觸媒使用量固定為0.3 g，總進料量固定為396 mmol/min，以反應溫度為450°C時最佳，溫度過低酚產率不足，溫度過高觸媒易失活；苯/笑氣進料莫耳比增加時，酚的選擇率亦增，苯/笑氣進料莫耳比為3.56時，酚的選擇率即達最大值(93%)；新合成的FeZSM-5觸媒需在線上活化80 min後方呈穩定，觸媒在之後4 h測試中皆能維持活性不變。
實驗之後得知，於FeZSM-5中以添加少量銅(0.2 wt%)有助於提升觸媒產酚的活性，但添加量過多(≧1 wt%)反使酚的產率減少。經過水蒸氣、水蒸氣與鹽酸處理後，FeZSM-5中有部份鋁和鐵被移除，使得觸媒總酸位減少，強酸比例增加，處理後的FeZSM-5在300~500°C的反應溫度間呈現較低的活性，選擇率則不受影響；在500~550°C間水蒸氣併鹽酸處理的FeZSM-5有最高的活性。於合成FeZSM-5時添加奈米碳管，可改變晶體粒徑分佈，部分晶體並有穿孔情形，但合成的FeZSM-5純度較差，致使產酚活性較未使用碳管差，但若扣除純度因素後，使用碳管合成之FeZSM-5則活性較佳。

This study used a nanosized FeZSM-5 and a series of modified FeZSM-5 to to produce phenol by direct oxidation of benzene. Nitrous oxide was the oxidant. FeZSM-5 was modified in four ways: incorporation of copper by impregnation, treating with steam, treating with steam and acid, and adding carbon nanotubes in the synthesis.
The catalysts synthesized for this study were characterized by XRD for the crystalline structures, by FESEM for the morphology, by nitrogen adsorption for the BET surface and micropore volume, by ICP-AES for the composition, and by NH3-TPR for knowing the acid strength distribution..
The activities of the catalysts were measured at 1 atm and 300-550oC, using a continuous flow micro-reactor loaded with 0.3 g catalyst. The total feed rate to the reactor was maintained at 396 mmol/min. The result showed that the optimum reaction temperature was 450oC. Carrying out the reaction at a temperature lower than 450oC would only give insufficient phenol yield. A temperature higher than 450oC would cause excessive catalyst deactivation, hence lower the yield of phenol. The selectivity to phenol increased with an increase in the ratio of benzene/N2O. A maximum selectivity of 93% was obtained at a ratio of 3.56. An activation period of 80 min was found for a newly synthesized FeZSM-5. The catalyst was stable after the activation for a 4 hours test run.
An incorporation of small amount of copper ( < 0.2 wt %) could enhance the activity of the FeZSM-5. But excess copper ( > 1 wt %) resulted in a lower activity due possibly to the clog of the pores by the copper. Steam treatment as well as steam plus acid treatments could both partially remove the aluminum and iron in FeZSM-5. The removal resulted in a decrease in the number of acid sites and an increase in the strength of the sites. As a consequence, the activity of the treated FeZSM-5, at least in 300-500oC, was reduced. The selectivity of CO, however, was not altered. The steam and acid treated FeZSM-5, due possibly to its higher thermal stability, exhibited a higher activity than the untreated counter part at a reaction temperature between 500-550oC. Adding carbon nanotubes in synthesizing could change the size of the FeZSM-5 crystals. Some of the crystals were found to be penetrated by the tubes. But the content of FeZSM-5 in the synthesized product was lower than that prepared without the tubes. As a consequence, the activity of the catalyst synthesized with the tubes was also lower. However, if purity factor was removed and the comparison was made on the same amount of pure FeZSM-5 basis, the FeZSM-5 prepared with the tubes showed higher activity than that synthesized without the tubes.

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