主要研究了磷酸镍基类分子筛材料VSB-1和CoVSB-1对H2和H2NCH2CH2NH2的吸附性质. VSB-1和CoVSB-1对H2的吸附是一种超临界物理吸附. VSB-1和CoVSB-1H2NCH2CH2NH2的吸附量比对H2O分子、C2H5OH分子以及其他有机胺蒸汽分子的吸附量大, 分别是19.7wt％和24.3wt％, 通过XRD、FT-IR和UV-Vis等光谱表征证实了VSB-1和CoVSB-1 H2NCH2CH2NH2的化学吸附机理, 即H2NCH2CH2NH2与VSB-1和CoVSB-1骨架结构中的过渡金属Ni和Co离子活性位的螯合作用.
The adsorption of H2 and H2NCH2CH2NH2 on the nickel-phosphate-basis
molecular sieves VSB-1 and CoVSB-1 was studied. The adsorption of H2 is a supercritical physisorption. The adsorption quantity of H2NCH2CH2NH2 on VSB-1 and CoVSB-1 is larger than that of H2O, C2H5 OH and other vapor of organicamines. VSB-1 and CoVSB-1 can adsorb 19.7wt％ and 24.3wt％ of H2NCH2CH2NH2 respectively. The chemisorption mechanism of H2NCH2CH2NH2 on VSB-1 and CoVSB-1 was verified by using XRD, FT-IR and UV-Vis characterization. The large adsorption quantity of H2NCH2CH2NH2 is caused by the chelation between H2NCH2CH2NH2 and the active sites of Ni and Co
in the frameworks of VSB-1 and CoVSB-1.
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