吳紀聖2006-07-252018-06-282006-07-252018-06-281999http://ntur.lib.ntu.edu.tw//handle/246246/9198本研究探討苯、甲苯、二甲苯（BTX ） 在白金/活性碳載體觸媒的深度氧化。活性 碳經過不同前處理步驟，分別以400 ℃、800 ℃熱處理及HF 酸洗，分別標為AC400 、 AC400HF 、AC800 、AC800HF ，所有白金 觸媒均用以臨界沾濕法製備，再以氫氣在 300 ℃還原2 小時。白金含量約為0.3wt%。 經反應測試，其完全氧化BTX 的溫度約為 130-190 ℃。氧化由易到難依序為 Benzene 、Toluene 、Xylene 。在無水狀態 下，Benzene 和Toluene 在Pt/AC800 、 Pt/AC800HF 的完全氧化溫度約在130-160 ℃;Pt/AC400 及Pt/AC400HF 則需提高至 160-190 ℃。在進料含6%水的狀態時則所 有觸媒的完全氧化溫度約為160-170 ℃，顯 示氧化反應時，水氣使觸媒活性差距縮 小。由BTX 吸附後的活性碳TGA 可得知 AC800 及AC800HF 在150 ℃以上對BTX 的 吸附量明顯高於AC400 及AC400HF 。推測 BTX 吸附在活性碳上，游動至Pt 活性基， 與Pt 吸附的氧發生氧化反應，因此改善活 性碳的疏水表面可以增加活性。This research is to investigate the deep oxidation of benzene, toluene and xylene (BTX) on Pt hydrophobic catalysts. Active carbons were pretreated under 400 ℃, 800 ℃ and HF washing, then labeled as AC400, AC400HF, AC800 and AC800HF. The 0.3 wt% Pt catalysts were prepared using H 2 PtCl 4 by incipient wetness method, following H 2 reduction at 300 ℃ for 2 hours. The complete oxidation temperature of BTX ranges from 130-190 ℃. The temperature of completely oxidation from low to high is benzene, toluene and xylene. Benzene and toluene are completely oxidized at 130-160 ℃using Pt/AC800 and Pt/AC800HF in dry condition, while the complete oxidation is at160-190 ℃ using Pt/AC400 and Pt/AC400HF. For all catalysts, the complete oxidation is in the range of 160-170 ℃ under 6% water in the feed. Less difference of catalytic activities is found in humid condition. Above 150 ℃, the amount of BTX adsorptions in AC800 and AC800HF are higher than those of AC400 and AC400HF from TGA. A mechanism is proposed that adsorbed BTX migrate to Pt site, and are oxidized by O 2 . Therefore the oxidation activity of BTX is enhanced by the hydrophobic active carbon.application/pdf68677 bytesapplication/pdfzh-TW國立臺灣大學化學工程學系暨研究所鉑揮發有機物疏水性觸媒活性碳苯甲苯二甲苯PtVOChydrophobic catalystactive carbonBTXreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/9198/1/882214E002028.pdf