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首次提出红外-重量法,以2,6-二甲基吡啶为分子探针,同时测定分子筛中Br(?)nsted和Lewis酸浓度及酸强度分布。对于Y型分子筛,实验结果表明Lewis酸中心的强度分布较Br(?)nsted酸中心均匀。
The infrared - gravimetric method was proposed for the first time. 2,6 - lutidine was used as a molecular probe to determine Br (?) Nsted and Lewis acid concentration and acid strength in molecular sieve. For Y zeolite, the experimental results show that the intensity distribution of Lewis acid centers is uniform than Br (?) Nsted acid centers.