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[求助]
求一段加氢专业的英译汉
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| It is evident from the NH3-TPD profiles (Fig. 4) that both AS and AM showed a broad peak in the temperature range of 120–250℃. However, the number of acid sites in AM is almost twice as compared to those present in AS. This could be one of the reasons for the higher conversion of AM in spite of having a lower surface area than AS. Further, sample AU has high surface area and stronger acid sites than AM and AS as indicated by the broad peak in the temperature range of 200–300℃ which are labeled as MS (moderately strong acid sites). |
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【答案】应助回帖
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爱与雨下(金币+1): ~! 2011-08-20 09:38:35
sltmac(金币+1): 欢迎常来 2011-08-20 09:48:49
loser_zhu(金币+34, 翻译EPI+1): 2011-08-20 16:19:39
爱与雨下(金币+1): ~! 2011-08-20 09:38:35
sltmac(金币+1): 欢迎常来 2011-08-20 09:48:49
loser_zhu(金币+34, 翻译EPI+1): 2011-08-20 16:19:39
| 由NH3-TPD图（图4）可以看出AS和AM在120-250℃范围内均有一个较宽的脱附峰。然而，AM上的酸中心数量几乎是AS上酸中心数量的两倍。虽然AM的比表面积小于AS的比表面积，但是酸中心数量多可能是AM上具有较高活性的原因之一。另外，与AM和AS比较，AU具有较高的比表面积和较强的酸性（图中MS在200-300℃之间有一个较宽的脱附峰，被标示为MS，即中等强度酸中心） |
2楼2011-08-20 09:10:29
phu_grassman
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爱与雨下(金币+1): ~! 2011-08-20 09:38:46
sltmac(金币+1): 专家顾问热心 2011-08-20 09:48:34
爱与雨下(金币+1): ~! 2011-08-20 09:38:46
sltmac(金币+1): 专家顾问热心 2011-08-20 09:48:34
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It is evident from the NH3-TPD profiles (Fig. 4) that both AS and AM showed a broad peak in the temperature range of 120–250℃. However, the number of acid sites in AM is almost twice as compared to those present in AS. This could be one of the reasons for the higher conversion of AM in spite of having a lower surface area than AS. Further, sample AU has high surface area and stronger acid sites than AM and AS as indicated by the broad peak in the temperature range of 200–300℃ which are labeled as MS (moderately strong acid sites). 从图4给出的NH3-TPD谱图可以明显的看出AS和AM都在温度为120–250℃间出现了宽峰。然而AM中得酸中心的数目几乎是AS中的两倍。这有可能是AM虽然具有比AS更小的表面积，但具有更高转化率的一个原因。此外在温度200–300℃之间的以MS（中等强度的酸位）标记的宽峰显示，样品AU具有大的表面积以及比AM和AS更强的酸中心。 |
3楼2011-08-20 09:19:25
