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以自发单层分散理论为指导,比较研究了不同条件对CaBr-2和CaCl_2在粗孔硅胶上单层分散的影响,以及35℃时二体系不同担载量微波样品的氨吸附等温线和吸附量衰减情况.结果表明,经焙烧分散,CaBr_2/硅胶体系的单层分散阈值介于0.5 g/g～0.6 g/g之间,CaCl_2/硅胶体系的阈值小于0.4 g/g;经微波辐射分散,二体系的阈值均介于0.5 g/g～0.6 g/g之间.说明微波辐射对二体系单层分散更有利.微波辐射样品的吸附实验表明,当二体系的担载量为0.5 g/g时,其吸附量达到最大,且在吸附—脱附循环中无衰减,均有明显的阈值效应.在相同条件下,CaCl_2/硅胶的吸附效果显著好于CaBr_2/硅胶.
Guided by the theory of spontaneous monolayer dispersion, the effects of different conditions on the monolayer dispersion of CaBr-2 and CaCl 2 on macroporous silica gel and the adsorption isotherms of ammonia and adsorption on microwave samples with different loadings at 35 ℃ The results showed that the single layer dispersion threshold of CaBr 2 / silica gel system was between 0.5 g / g and 0.6 g / g, and the threshold of CaCl 2 / silica gel system was less than 0.4 g / g after roasting and dispersing. , The thresholds of the two systems were between 0.5 g / g ~ 0.6 g / g, indicating that microwave radiation is more favorable for the monolayer dispersion of the two systems.The adsorption experiments of microwave radiation showed that when the loading of the two systems is 0.5 g / g, the maximum adsorption capacity and the no-attenuation in the adsorption-desorption cycle all have obvious threshold effect.Under the same conditions, the adsorption effect of CaCl 2 / silica gel is better than that of CaBr 2 / silica gel.