化工学报2019，Vol.70Issue(12)：4635-4644,10.DOI:10.11949/0438-1157.20190690
Mn基脱硝催化剂抗水抗硫改性的模拟与实验研究
Simulation and experimental study on modification of water and sulfur resistance by Mn-based denitration catalyst
摘要
Abstract
To investigate the effect of ZSM-5 zeolite as carrier and Ce doping on the low temperature denitrification activity and water/sulfur resistance of the catalyst, the effects of carrier type and Ce doping on the performance of the catalyst were studied by molecular dynamics simulation and experimental research. Molecular dynamics simulations showed that ZSM-5 zeolite as a carrier significantly inhibited the adsorption of H2O on its surface compared with γ-Al2O3. Adding Ce to the active component not only inhibited the adsorption of H2O on its surface, but also mitigated the poisoning effect of SO2 on the catalyst. The experimental study found that Mn-Fe-Ce/ZSM-5 has better denitration activity under low temperature and water/sulfur resistance. The addition of Ce has a positive effect on improving the low temperature activity and water/sulfur resistance of the catalyst. ZSM-5 zeolite as carriers also play an important role in improving the water resistance of the catalyst. The SEM, XRD, BET, TG-DTG and other characterization methods and BaCl2 bubbling experiments were carried out to analyze the mechanisms for the improvement of sulfur resistance of Mn-Fe-Ce/ZSM-5 catalyst. It was found that the addition of Ce increased the oxygen storage and oxygen release capacity of the catalyst. Oxidation of SO2 in the flue gas to SO3 avoids the reaction of SO2 with the active component, so that the active component on the surface of the catalyst is not destroyed, and the catalytic reaction performance of the catalyst is ensured.关键词
低温脱硝/锰基催化剂/选择催化还原/分子模拟/抗水抗硫性Key words
low temperature denitration/ Mn-based catalyst/ selective catalytic reduction/ molecular simulation/water/sulfur resistance分类
化学化工引用本文复制引用
王金玉,朱怀志,安泽文,巩建,王翠苹..Mn基脱硝催化剂抗水抗硫改性的模拟与实验研究[J].化工学报,2019,70(12):4635-4644,10.基金项目
国家自然科学基金项目(51676102) （51676102）
