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Zeolitemolecularsieves,withtheuniformchan nelstructureandshapeselectiveproperty,arewidely usedascatalystsinindustriesofoil refining,petro chemicals,fine chemicalsandsoon.However,the poresizesofzeolitemolecularsievesusuallyaresmall erthan2nm,itgreatlypreve… 相似文献
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