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　　大撒金，小CC审稿意见回复求助！！！。Different strength acid sites determinated by NH3-TPD are suggested to be related to the performance of catalysts, especially for the medium strength acid sites. However, the data in the Table 1 show the deposition of a little P (0.4P/TaO) greatly promote the sorbitol conversion, and reaction conversion does not further significantly increased with the increasing of P. At the same time, the amount of medium acid sites of 0.4P/TaO is 9.405, which is similar to that of 0.8 P/TaO(10.444), the corresponding selectivity of isosorbide increase about 7%. While, the amount of medium acid sites of 0.8P/TaO is much higher than that of 1.0 P/TaO(5.924), the corresponding selectivity of isosorbide decreases only about 9%, why? The authors should further discuses the role of medium (peak 2) or strong acid sites (peak 2) in the reaction, and the relationship between the distribution of acid sites with conversion and selectivity
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