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[ Last edited by qbliu on 2008-5-14 at 10:12 ]
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qbliu(½ð±Ò+1,VIP+0):лл
qbliu(½ð±Ò+2,VIP+0):thanks 4-4 09:37
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2Â¥2008-05-14 14:07:00
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limour

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qbliu(½ð±Ò+4,VIP+0):лл!!!
rabbit7708(½ð±Ò+2,VIP+0):¹ÄÀøÐ³æÈÈÐÄÓ¦Öú£¬»¶Ó­³£À´´ß»¯°æà¶£¡£º£©
The composition and nature of coke/polyaromatic species on the surface of catalysts have been widely investigated in literature. Generally, two kinds of coke were identified by their ¡°soft¡± or ¡°hard¡± properties, according to their aromaticity degree. The former one displayed a low aromatic character, high H/C ratio and low combustion temperature at about 573 K, composed of alkylated mono and diaromatics. The latter one displayed a high aromatic character, low H/C ratio and high combustion temperature at about 723 K, composed of aromatics entirely.

Sahoo SK, Raob PVC, Rajeshwer  D, Krishnamurthy KR, Singh ID, Structural Characterization of Coke Deposits on Industrial Spent Paraffin Dehydrogenation Catalysts, Applied Catalysis A: General 2003, 244 , 311¨C321
Wolf EE, Alfani F, Catalysts Deactivation by Coking,  Catal. Rev. Sci. Eng. 1982,24,  3, 329-371.
Macia-Agullo JA, Cazorla-Amoros D, Linares-Solano A, Wild U, Su DS, Schlögl R. Oxygen functional groups involved in the styrene production reaction detected by quasi in situ XPS. Catal. Today 2005, 102, 248-253.
Pereira MFR, Orfao JJM, Figueiredo JL, Oxidative dehydrogenation of ethylbenzene on activated carbon catalysts. I. Influence of surface chemical groups.  Appl. Catal. A: General 1999, 184, 153-160.
Trimm DL, The Formation and Removal of Coke from Nickel Catalyst,  Catal. Rev. Sci. Eng. 1977,16, 155-189.
3Â¥2008-05-14 21:32:54
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tanghd

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4Â¥2008-05-17 08:46:17
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limour

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buffaloli(½ð±Ò+1,VIP+0):¶àлÌÖÂÛ£¡
qbliu(½ð±Ò+1,VIP+0):thanks 4-4 09:36
I think only last two kinds of carbon were coke. the first one, active carbon species, can not be name " coke"

I think you used TPO?
ÒýÓûØÌû:
Originally posted by tanghd at 2008-5-17 08:46:
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5Â¥2008-05-19 18:32:07
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queershanren

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