分别选用硝酸铁、硝酸铜、硝酸铈、硝酸铋四种硝酸盐利用等体积浸渍法制备分子筛,利用X射线衍射、氮气物理吸附对改性前后的分子筛进行表征。针对FeY分子筛,考察了吸附时间、吸附温度、剂油比对脱除有机氯的性能影响。结果表明:经硝酸...分别选用硝酸铁、硝酸铜、硝酸铈、硝酸铋四种硝酸盐利用等体积浸渍法制备分子筛,利用X射线衍射、氮气物理吸附对改性前后的分子筛进行表征。针对FeY分子筛,考察了吸附时间、吸附温度、剂油比对脱除有机氯的性能影响。结果表明:经硝酸铁、硝酸铜、硝酸铈、硝酸铋改性的分子筛,硝酸铁改性效果最明显,达到了70%。比表面积和孔结构的测定结果显示,比表面积是影响脱氯效果的重要因素之一,比表面积越大,脱除效果越好。当吸附时间为240 min、吸附温度为50℃、剂油比为1:50时,吸附效果达到最好。Four nitrates, ferric nitrate, copper nitrate, cerium nitrate and bismuth nitrate, were selected to prepare molecular sieves by volumetric impregnation method, and X-ray diffraction and nitrogen physisorption were used to characterize the molecular sieves before and after modification. In the case of FeY molecular sieve, the influence of adsorption time, adsorption temperature and agent-to-oil ratio on the dechlorination effect was explored. The results showed that after the molecular sieves were modified by ferric nitrate, copper nitrate, cerium nitrate and bismuth nitrate, ferric nitrate had the most obvious modification effect, reaching 70%. The results of specific surface area and pore structure showed that specific surface area is one of the important factors affecting the dechlorination effect, and the larger the specific surface area, the better the removal effect. The best adsorption effect was achieved when the adsorption time was 240 min, the adsorption temperature was 50˚C, and the agent-to-oil ratio was 1:50.展开更多
文摘分别选用硝酸铁、硝酸铜、硝酸铈、硝酸铋四种硝酸盐利用等体积浸渍法制备分子筛,利用X射线衍射、氮气物理吸附对改性前后的分子筛进行表征。针对FeY分子筛,考察了吸附时间、吸附温度、剂油比对脱除有机氯的性能影响。结果表明:经硝酸铁、硝酸铜、硝酸铈、硝酸铋改性的分子筛,硝酸铁改性效果最明显,达到了70%。比表面积和孔结构的测定结果显示,比表面积是影响脱氯效果的重要因素之一,比表面积越大,脱除效果越好。当吸附时间为240 min、吸附温度为50℃、剂油比为1:50时,吸附效果达到最好。Four nitrates, ferric nitrate, copper nitrate, cerium nitrate and bismuth nitrate, were selected to prepare molecular sieves by volumetric impregnation method, and X-ray diffraction and nitrogen physisorption were used to characterize the molecular sieves before and after modification. In the case of FeY molecular sieve, the influence of adsorption time, adsorption temperature and agent-to-oil ratio on the dechlorination effect was explored. The results showed that after the molecular sieves were modified by ferric nitrate, copper nitrate, cerium nitrate and bismuth nitrate, ferric nitrate had the most obvious modification effect, reaching 70%. The results of specific surface area and pore structure showed that specific surface area is one of the important factors affecting the dechlorination effect, and the larger the specific surface area, the better the removal effect. The best adsorption effect was achieved when the adsorption time was 240 min, the adsorption temperature was 50˚C, and the agent-to-oil ratio was 1:50.
