Znn3bq.jpeg
²é¿´: 386  |  »Ø¸´: 10
µ±Ç°Ö÷ÌâÒѾ­´æµµ¡£

dervish

½ð³æ (ÕýʽдÊÖ)

[½»Á÷] ¡¾´ß»¯½øÕ¹¡¿Snapshots of Working Catalysts

Snapshots of Working Catalysts

Vanadium phosphates (VPOs) are used industrially to catalyze the partial oxidation of n-butane to maleic anhydride, which is then used as a starting material for products such as resins and lubricants. However, the reaction proceeds at elevated temperatures (in excess of 400¡ãC), and VPO phases stable under those conditions will transform to other phases at ambient conditions, so an understanding of this catalyst demands that it be studied near its working conditions. Conte et al. (p. 1270) have used powder x-ray diffraction, as well as laser Raman spectroscopy and electron paramagnetic resonance spectroscopy, to determine the transformation of VPO phases as a function of temperature and with various reactants and products present over the catalyst. They conclude that the presence of the reactants rapidly converts -VOPO4 to -VOPO4, but that the initial formation of the phase may create the V5 sites associated with increased catalytic activity.

Ïà¹ØÎÄÕÂÏÂÔØ£º
http://www.box.net/public/3h5dlh7o7t

[ Last edited by berlin on 2006-11-13 at 17:27 ]
»Ø¸´´ËÂ¥
Ò»¸öÂÛ̳µÄºÃ»µ²»ÔÚÓÚÂÛ̳ÓжàÉÙ»áÔ±Óжà´óµÄ·þÎñÆ÷£¬ÔÚÓÚÂÛ̳µÄÈËÊÇ·ñ¿ªÐÄ£¬ÊÇ·ñ»¥Ïà°ïÖú£¬»¥Ïà¹ØÐÄ¡£Ò»¸öºÃµÄÂÛ̳¾ÍÊÇÒ»¸ö¿ªÐĵÄÍøÉÏ´ó¼ÒÍ¥¡£
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

rabbit7708

ÈÙÓþ°æÖ÷ (Ö°Òµ×÷¼Ò)

Ðijæ

0.5

Ö§³Öһϣ¬ºÃ¾ÃûÀ´¿´Ìù×ÓÁË¡£
ºÇºÇ¡£ÏÂÔØÏÂÀ´ºÃºÃ¿´¿´£¡
»¯Ñ§Ñ§¿Æ¡ª¡ª´ß»¯×¨°æ»¶Ó­Äú£¡£º£© http://emuch.net/bbs/forumdisplay.php?fid=190 ³£À´¿´¿´Ó´£¡£º£©
2Â¥2006-09-01 12:23:41
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

1

3Â¥2006-09-01 13:11:15
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wszynh

½ð³æ (СÓÐÃûÆø)

1

ºÃ,¶àл
4Â¥2006-09-01 15:16:47
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

1

5Â¥2006-09-01 22:20:40
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

1

6Â¥2006-09-02 01:07:22
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

1

7Â¥2006-09-02 08:00:57
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

1

8Â¥2006-09-02 08:05:48
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zmzhou

ÖÁ×ðľ³æ (Ö°Òµ×÷¼Ò)

1

·Ç³£¸Ðл£¡
9Â¥2006-09-03 18:26:42
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

mesoporous

½ð³æ (СÓÐÃûÆø)

1


ding yige
10Â¥2006-09-05 15:31:46
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ dervish µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 295Çóµ÷¼Á +4 ?ÒªÉϰ¶? 2026-04-05 5/250 2026-04-10 23:05 by Ftglcn90
[¿¼ÑÐ] 277 ÊýÒ»104£¬Ñ§Ë¶£¬Çóµ÷¼Á +17 Æ¿×ÓPZ 2026-04-09 18/900 2026-04-10 22:47 by À´¿´Á÷ÐÇÓê10
[¿¼ÑÐ] µ÷¼Á +19 СÕÅZA 2026-04-10 20/1000 2026-04-10 22:08 by Öí»á·É
[¿¼ÑÐ] ±¾¿Æ211 ¹¤¿Æ085400 280·ÖÇóµ÷¼Á ¿É¿çרҵ +10 LZH£¨µÈ´ýµ÷¼ÁÖÐ 2026-04-10 10/500 2026-04-10 21:47 by fxue1114
[¿¼ÑÐ] 295·ÖÇóµ÷¼Á +6 ?ÒªÉϰ¶? 2026-04-10 6/300 2026-04-10 21:13 by chemisry
[¿¼ÑÐ] ҩѧר˶µ÷¼Á +6 ? һ·Éú?»¨? 2026-04-10 7/350 2026-04-10 21:08 by zhouxiaoyu
[¿¼ÑÐ] 298Çóµ÷¼Á +8 ¶¤¶£ß˶¬¹Ï 2026-04-07 10/500 2026-04-10 11:25 by ¸ßά´º
[¿¼ÑÐ] »¯Ñ§¹¤³Ìµ÷¼Á289 +42 yangæÃ 2026-04-07 48/2400 2026-04-10 09:34 by 690616278
[¿¼ÑÐ] ÉúÎïÓëÒ½Ò©273Çóµ÷¼Á +18 ÀóÌâÄÏǽ 2026-04-05 19/950 2026-04-10 08:14 by kangsm
[¿¼ÑÐ] 0860004 Çóµ÷¼Á 309·Ö +7 Yin DY 2026-04-08 7/350 2026-04-09 14:06 by ditto77778
[¿¼ÑÐ] ÉúÎïѧ308·ÖÇóµ÷¼Á£¨Ò»Ö¾Ô¸»ª¶«Ê¦´ó£© +13 ÏàÐűػá¹ââÍòÕ 2026-04-06 16/800 2026-04-09 13:54 by ÐìÁ¼°×ü´óÏÀ
[¿¼ÑÐ] 0860004 Çóµ÷¼Á 309·Ö +6 Yin DY 2026-04-09 6/300 2026-04-09 10:19 by °¡Àî999
[¿¼ÑÐ] 22408 266Çóµ÷¼Á +11 masss11222 2026-04-07 14/700 2026-04-08 11:06 by yulian1987
[¿¼ÑÐ] Çóµ÷¼Á +15 ÐܶþÏëÉϰ¶ 2026-04-06 15/750 2026-04-08 04:53 by Î޼ʵIJÝÔ­
[¿¼ÑÐ] 344Çóµ÷¼Á +11 κ×Óper 2026-04-07 11/550 2026-04-07 23:01 by JourneyLucky
[¿¼ÑÐ] ²ÄÁϹ¤³Ì310ר˶µ÷¼Á +14 ÀÌÀÌÎÒ¡­. 2026-04-04 15/750 2026-04-06 14:18 by lqwchd
[¿¼ÑÐ] »¯Ñ§357·Ö£¬¿¼Ñе÷¼Á +11 .Starry. 2026-04-04 12/600 2026-04-06 06:28 by houyaoxu
[¿¼ÑÐ] 085600µ÷¼Á +9 ¶«ÕÕÕÕÕÕ 2026-04-04 9/450 2026-04-05 13:44 by ujn_zhuj
[¿¼ÑÐ] 358Çóµ÷¼Á +7 Çïgk 2026-04-04 7/350 2026-04-05 13:29 by huangmoli
[¿¼ÑÐ] 0854Çóµ÷¼Á +4 assdll 2026-04-04 4/200 2026-04-05 09:44 by zhq0425
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û