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本文用氨吸附差热和正丁胺非水溶剂滴定方法考察了氢型绦光沸石(HM)不同吸附温度下的表面酸性。氨吸附的实验结果表明,在100℃-300℃之间,HM表面上存在着对氨的可逆吸附和不可逆吸附两种酸中心,测定了它们的相对吸附量及其随温度的变化,此外在非水溶剂中用正丁胺对该样品的测定结果表明,在室温下Pk_o值在+2.0到+5.0之间的酸量约为0.(meq)/g;Pk_0值>+5.0的酸量约为0.4 meq/g,似乎在氨和正丁胺吸附问并未发现对应关系存在,对结果进行了初步讨论。
In this paper, the surface acidity of hydrogen-type mordenite (HM) at different adsorption temperatures was investigated by differential adsorption of ammonia and n-butylamine nonaqueous solvent titration. The experimental results of ammonia adsorption show that there are two kinds of acid sites on the surface of HM for the reversible adsorption and irreversible adsorption of ammonia between 100 ℃ and 300 ℃. The relative adsorption amount and its change with temperature are measured. The determination of this sample with n-butylamine in a non-aqueous solvent showed that the amount of acid having a Pk_o value of between +2.0 and +5.0 at room temperature was about 0. (meq) / g; the acid value of Pk_0> +5.0 About 0.4 meq / g, it seems that in ammonia and n-butylamine adsorption asked did not find the existence of correspondence between the results of a preliminary discussion.