Particularly for heavier diffusive molecules or at a relatively low separation temperature, the effect of the Knudsen diffusion should be accounted for. ·The activation energies of surface diffusion of methane and ethane are estimated to be 7.8±0.1和9.0±0.5 kJ·mol~(-1).
2)考虑支撑层阻力时,甲烷、乙烷在膜层中气相活化扩散的活化能分别为8.1±0.2和9.2±0.1 kJ·mol-1;温度越高膜层中气相活化扩散越明显,其对组分总通量的贡献甚至要大于表面扩散。
参考来源 - 烃类分子混合物沸石基膜分离过程模型化研究·2,447,543篇论文数据，部分数据来源于NoteExpress
结果表明，氧和氮在炭分子筛中的扩散是活化扩散，该过程可用双孔模型进行描述。
The results indicate that the diffusion process of oxygen and nitrogen in carbon molecular sieve is activated, such an process may be represented by the dual diffusion resistance model.
最后由阿累尼乌斯公式计算了气体透过炭分子筛膜的活化能，进一步说明气体透过机理为活化扩散。
The permeation apparent activation energies were calculated according to the Arrhenius equation, and indicated the gas diffusion mechanism was molecular sieving.
从而得出钯活化钼的烧结机理以晶界扩散为主。
It is concluded that the activated sintering mechanism of molybdenum by palladium is mainly derived from boundary diffusion.
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