论文部分内容阅读
The preparation of novel dechlorination adsorbent by using the modified 13X molecular sieve and its adsorption mechanism were studied. XRD and SEM analyses showed that the Ag-13X molecular sieve revealed a new crystal plane, while other molecular sieve samples more or less contained some impurities. The BET data showed that only Ag+ions could enlarge the pore size and the pore volume at the same time. The NH3-TPD diagram showed that the acid sites of the adsorbent increased after its modification by metal ions and only the Ag-13X molecular sieve generated new medium strong acid sites. According to adsorption experiments conducted at different concentration and temperature, the dechlorination adsorption mechanism of Ag-13X molecular sieve was a combination of physical adsorption and chemical adsorption which showed the different degree of influence at different temperatures.