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通过对分子筛的改性,构造各种类型、各种强度的能垒。测定在不同温度和不同压力下,吸附质在分子筛上的吸附扩散性能。采用频率响应(FR)技术研究苯在NiY分子筛上的吸附机理。分别选取的温度点为302K,373K和压力点为53.3~133Pa范围内测定FR谱图。研究结果表明,苯在NiY分子筛上是以吸附为速率控制步骤的传质过程,同时存在高频吸附和低频吸附两个不同的吸附过程。高频吸附是通过络合作用、低频吸附是以氢键作用为主的吸附过程。
Through the molecular sieve modification, the structure of various types, various strength barrier. The adsorption and diffusion properties of adsorbate on zeolites were measured under different temperatures and different pressures. Adsorption mechanism of benzene on NiY zeolite was studied by frequency response (FR) technique. The selected temperature points were 302K, 373K and the pressure point of 53.3 ~ 133Pa measured FR spectrum. The results show that benzene is adsorbed on the NiY zeolite as a rate-controlling step in the mass transfer process, and there are two different adsorption processes: high-frequency adsorption and low-frequency adsorption. High-frequency adsorption is through the complexation, low-frequency adsorption is based on hydrogen bonding-based adsorption process.