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loser木虫 (小有名气)
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图4是A、B和C的NH3-TPD曲线，从图4可以看出，A、B和C催化剂都有两个NH3脱附峰,低温峰对应于NH3 在沸石骨架中弱酸中心的脱附,高温峰对应于NH3在沸石骨架中强酸中心上的脱附，其中低温脱附峰面积较大，高温峰脱附峰面积较小，说明A、B和C催化剂都呈弱酸性，A的酸性较B和C都弱，用于馏份油加氢反应时有利于异构化反应，可避免过多裂化反应的发生。 The NH3-TPD curves of A、B and C are showed in Figure 4.In Figure 4, A、B and C all have two desorption peak of NH3,the low temperature peak is correspond to the desoption on the weak acid center,and high temperature peak is correspond to the desoption on the strong acid center,which the area of low temperature peak is larger and the area of high temperature peak is smaller.It indicates that all the acid of A、B and C are weak,and the A is the weakest of all three catalysts, it is beneficial to isomerization reaction and excessive hydrocracking can be avoided. |
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crazybioinfo
金虫 (正式写手)
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2楼2010-10-23 15:37:21
crazybioinfo
金虫 (正式写手)
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loser(金币+20, 翻译EPI+1): 2010-10-24 17:46:47
| The NH3-TPD curves of A,B and C are showed in Figure 4.In Figure 4, A,B and C all have two peaks .The low temperature peak corresponds to desorption in the center of weak acid ,and the high temperature peak corresponds to desorption in the center of strong acid .The area of low temperature peak is larger than high temperature peak .It indicates that all the catalysts of A,B and C are weak acid , and A is weaker than B and C .Using A for oil hydrogenation reaction will be beneficial to isomerization reaction and can avoid excessive cracking reactions. |
3楼2010-10-23 16:11:30