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WO_3의 환원-탄화에 있어서 Zeolite NaX, HX, KX의 특성에 따른 영향
이동활,이종대,박영효,박노국,이태진 한국공업화학회 2003 응용화학 Vol.7 No.1
The effect of the Zeolite HX,NaX, and KH prepared by ion-exchange method, on the reduction-carburization of WO_3 was studied This study was performed at thetemperature range from 300℃ to 735 ℃ with CO gas. The produced gas, CO_2, was analyzed by mass spectroscopt The addition of the Zeolite HX, NaX,and KX into WO_3 increased the efficiency of the reduction-carburization of WO_3 and Zeolite HX with the strongest acidity was the most effective on redution-carburization among them. The Zeolite HX, NaX, and KX improved the oxygen mobility of WO_3 and the acidity of the Zeolite was directly related to the increasing efficiency of reduction-carbuization of WO_3.
Zeolite X 촉매를 이용한 WO₃의 CO 환원-탄화반응
이동활,이종대,전진혁,박노국,류시옥,이태진 嶺南大學校 工業技術硏究所 2003 工業技術硏究所論文集 Vol.31 No.2
This study was performed to manufacture tungsten carbide from CO reduction- carburization of WO₃using zeolite-NaX catalyst. Zeolite-NaX catalyst could improve the reduction property of WO₃. Moreover, zeoite-HX and KX catalysts also improved the reduction property of WO₃. This improvement of reduction property leaded to the decrease of reaction temperature. The size of WC particle was 50∼60 nm at 650 ℃ for 10h. From these results, it is concluded that the various zeolite X catalysts could be used for the reduction-carburization of W0₃ as the catalysts.