问题：假如没有全文可以查到摘要也可以咯！！谢谢！！
类型：求助 (悬赏分:3分)
提问：happylove
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版块：有机化学问题(jimuwei,fpcwin1211,netpanda,yjgzfl,Ftian,)
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回复：2
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时间：2005-12-09 18:11:00 编辑加入/取消收藏订制/取消短消息举报该贴

[1] Hao Z P,An L D ,Wang H L.[J] . React .Ki net.Catal.Lett, 1996,59,(2):259
[2]Nkosi B, Coville N J,Hutch ings G J,et al. J. Catal,1991,128:366—377

回复人：Sunewang,▲▲▲▲ (Science and Girls) 时间：2005-12-09 19:32:54 编辑

1楼

[2]Abstract
A detailed study of the processes occurring during the deactivation of gold catalysts used for the acetylene hydrochlorination reaction is described. Catalyst deactivation is a common feature of supported metal chloride catalysts for this reaction, but in the case of HAuCl4/C catalysts the deactivation is not due to loss of Au from the catalyst during use. The effect of a range of parameters on the deactivation rate is discussed, including method of preparation of the HAuCl4/C catalyst, [Au] and reaction conditions (GHSV and temperature). Deactivated and fresh catalysts were characterised using 197An Mössbauer spectroscopy in combination with X-ray diffractometry, TGA, and BET surface area determinations. On the basis of this study, two deactivation processes have been identified. At low reaction temperatures, 60–100°C, deposition of carbonaceous residues is the predominant deactivation mechanism. However, at higher reaction temperatures, 120–180°C, the main deactivation process is ascribed to the reduction of Au(III), and possibly Au(I), to the less active Au(0) during the catalytic reaction. Consequently, for the experimental conditions investigated in this study, the optimum temperature for operating these catalysts is in the range 100–120°C when both these deactivation processes can be minimised

回复人：happylove,▲ (三人行必有我师！！) 时间：2005-12-09 21:18:45 编辑	2楼
已经打分了。

得分人：Sunewang-2,

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