用程序升温热脱附方法,通过一次实验即可得到不同温度的分子筛晶内扩散系数.考虑到在热脱附初期,吸附分子的浓度较大,可能存在相互作用的影响,本文提出了处理热脱附失重曲线的新公式,并用两组分子筛样品进行了验证,结果表明,新公式明显优于旧公式. With the temperature-programmed desorption method, the intra-molecular diffusion coefficients at different temperatures can be obtained by one experiment. Considering the large concentration of adsorbed molecules in the initial stage of thermal desorption, the interaction may exist. In this paper, The new formula of desorption weight loss curve was validated by two groups of molecular sieve samples. The results show that the new formula is obviously better than the old formula.