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2Â¥2008-02-23 17:03:22
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pcchemist

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extralattice aluminum ÎÒ¸öÈ˾õµÃÊDz»ÊǹǼÜÖеÄÂÁÍѵôÒԺ󣬽øÈëÁ˿׵ÀÖУ¬Ò²ÐγÉÁË»îÐÔλ£¡ÕýÈç·Ö×ÓɸµÄÍÑÂÁ¡£
3Â¥2008-02-23 17:37:07
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4Â¥2008-02-23 18:06:06
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guo7fly

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Originally posted by pcchemist at 2008-2-23 17:37:
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extralattice aluminum ÎÒ¸öÈ˾õµÃÊDz»ÊǹǼÜÖеÄÂÁÍѵôÒԺ󣬽øÈëÁ˿׵ÀÖУ¬Ò²ÐγÉÁË»îÐÔλ£¡ÕýÈç·Ö×ÓɸµÄÍÑÂÁ¡£

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5Â¥2008-02-23 18:07:58
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guo7fly

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ÆäÖÐÎÄÏ×ÖÐÓÐÕâô¼¸¾ä£ºit has been shown recently  that aromatization activity of Z-34 zeolite (catalytic sites: bridging OH group only )increase in the initial period of catalyst  operation under the condition of methanol conversition to hydrocarbons .on the basis of the comparision of the prouduct selectivities ,observed over Z-34 zeolite after 55min of its operition ,and the initial product selectivities ,  observed over Z-34ST zeolite  (catalytic sites :bridging OH groups and  enhanced activity of Z-34 zeolite ), the increase of aromatization activity of  Z-34 zeolite was concluded to be due to the enhanced activity sites,which choud be created as a consequence  of the interaction of this zeolite with the reaction mixture (water vapor ) .
Õ⼸¾ä»°µÄÒâ˼ÊDz»ÊÇ˵ enhanced activity sites Óë bridging OH ÕâÖÖ»îÐÔÖÐÐÄÊDz»Ò»ÑùµÄ£¬enhanced activity sites ¶Ô·¼Ï㻯Óд߻¯×÷Óà £¬ËûµÄ²úÉúÊÇÓÉÓÚ´ß»¯¼ÁÓëË®ÕôÆû×öÓõÄÔ­Òò£¿


this fact further supports our previous results that hae shown that the new activity sites are less active in the steps of alkene formation from methanol and dimethylether than  are normal activity sites of HZSM-5----bridging OH groups.
´ÓÕ⼸¾ä»°ÊDz»ÊÇ¿ÉÒÔÍÆ¶Ï³ö the new activity sites  ¾ÍÊÇenhanced activity sites £¬¶ønormal activity sites  ¾ÍÊÇbridging OH groups  £¬Ç°Õß¶Ô·¼Ï㻯ÊÇÓлîÐԵ쬶øºóÕß¶ÔÏ©ÌþµÄÉú³ÉÊÇÓлîÐԵģ¿£¿

ÎÒÖªµÀµ¥¶ÀÕâô¿´ÊǺÜÄÑ Ã÷°×ÆäÖеÄÒâ˼£¡£¡¸÷λ¸ßÊÖ»¹ÊÇ»¨µêʱ¼ä°É£¡£¡Ð»Ð»£¡£¡
6Â¥2008-02-23 18:51:37
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pcchemist

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http://muchong.com/bbs/viewthread.php?tid=624250



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[ Last edited by pcchemist on 2008-2-23 at 20:07 ]
7Â¥2008-02-23 20:02:56
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guo7fly

Òø³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
Originally posted by pcchemist at 2008-2-23 20:02:
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http://muchong.com/bbs/viewthread.php?tid=624250



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[ Last edited by pcchemist on 2008-2-23 at 20:07 ]

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