针对目前广泛应用的线性推动力 (LDF)模型在吸附初始阶段相对误差高达 - 95%的缺点 ,提出了一种新的浓度分布剖面 ,并以此为基础建立了修正的LDF(MLDF)模型 .当无因次时间等于 0 .0 0 0 2时 ,LDF模型的相对误差高达 - 94 % ,而新模型的相对误差仅为 9.5% .与准确的浓度分布剖面相比 ,当无因次时间很小时 ,与LDF模型相对应的抛物线形浓度分布会产生负浓度分布剖面 ,而与新模型相对应的浓度分布则不会产生负浓度分布剖面 ,且十分接近于准确的浓度分布 ,说明新模型明显优于LDF模型 Aiming at the shortcomings that the relative linear error of LDF model is widely used up to 95% in the initial stage of adsorption, a new profile of concentration distribution is proposed and a modified LDF (MLDF) model is established. When the dimensionless time is equal to 0.002, the relative error of the LDF model is up to 94%, while the relative error of the new model is only 9.5%. Compared with the accurate profile distribution profile, when the dimensionless time is very Hour, the parabolic concentration distribution corresponding to the LDF model produces a negative concentration profile, while the concentration profile corresponding to the new model does not produce a negative concentration profile and is very close to the accurate concentration profile, indicating that the new model is significantly Better than the LDF model