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| The amount of coke deposited on the used catalysts was measured by TGA under air as described elsewhere [32]. Powder X-ray diffraction (XRD) spectra of catalysts (phase analysis) were recorded on a Stoe Stadi-P diffractometer with a monochromatic Cu-K¦Á1 radiation from a germanium monochromator in the angular range 20◦¡Ü 2¦È¡Ü70◦, with a step width of 0.04◦ and count time of 5 s per step. XRD patterns were attributed using the JCPDS database. |
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87xiaoyu(½ð±Ò+8, ·ÒëEPI+1):ллÁË 2010-05-16 16:42:39
| ÔÚ¿ÕÆøÌõ¼þÏÂTGA(ÊDz»ÊÇthermogravimetric analysisÄØ£¿ÎÒ²»ÖªµÀ)²âÁ¿ÁËÓô߻¯¼Á³Áµí½¹Ì¿µÄÁ¿£¬ÕâÔÚÆäËûÎÄÏ×ÖÐÓÐÃèÊö¡£Í¨¹ýStoe Stadi-PÑÜÉäÒ飬Õ൥ɫÒǽǷ½Î»20◦¡Ü 2¦È¡Ü70◦µÄµ¥É«Cu-K¦Á1ÉäÏߣ¬0.04◦²½³¤£¬ºÍ5Ãëÿ²½µÄ¼ÆËãʱ¼äÀ´²É¼¯´ß»¯¼ÁµÄ·Û¾«XÉäÏßÑÜÉä(XRD)Æ×ͼ(Ïà·ÖÎö)¡£XRD²Î¿¼£¨Joint Committee on Powder Diffraction Standards£©·ÛÄ©ÑÜÉä±ê×¼ÁªºÏίԱ»á±ê×¼¡£ |
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