研究溶液的浓度、pH值、温度、烟气流量、含氧量等对4种多钒取代磷钼杂多酸水溶液的脱硫脱硝性质的影响。结果表明,Dawson-V6杂多酸具有最佳的脱硫脱硝效果,当杂多酸溶液浓度为3.96 mmol/L,温度为25℃,pH为11,烟气流量0.05 m 3/h,含氧...研究溶液的浓度、pH值、温度、烟气流量、含氧量等对4种多钒取代磷钼杂多酸水溶液的脱硫脱硝性质的影响。结果表明,Dawson-V6杂多酸具有最佳的脱硫脱硝效果,当杂多酸溶液浓度为3.96 mmol/L,温度为25℃,pH为11,烟气流量0.05 m 3/h,含氧量9%时去除效果最好,杂多酸的脱硫效率可达100%,脱硝效率为79.58%。对实际锅炉排放的烟气除尘,杂多酸对二氧化硫和氮氧化物的去除率分别可以达到60.96%和35.27%。展开更多
Three heteropoly acids containing different amounts of V and Mo have been prepared by multi-step method. The methed was simple, economic in raw materials’ cost, and with relatively higher yield. ICP, TGA, Potentiomet...Three heteropoly acids containing different amounts of V and Mo have been prepared by multi-step method. The methed was simple, economic in raw materials’ cost, and with relatively higher yield. ICP, TGA, Potentiometric Titrations, Infrared, XRD and 51V NMR characterizations revealed that the compounds synthesized in present work had Keggin structure. The catalytic performance of the heteropoly acids obtained for the direct hydroxylation of benzene to phenol was also investigated, 26% phenol yield with more than 90% selectivity was obtained.展开更多
文摘研究溶液的浓度、pH值、温度、烟气流量、含氧量等对4种多钒取代磷钼杂多酸水溶液的脱硫脱硝性质的影响。结果表明,Dawson-V6杂多酸具有最佳的脱硫脱硝效果,当杂多酸溶液浓度为3.96 mmol/L,温度为25℃,pH为11,烟气流量0.05 m 3/h,含氧量9%时去除效果最好,杂多酸的脱硫效率可达100%,脱硝效率为79.58%。对实际锅炉排放的烟气除尘,杂多酸对二氧化硫和氮氧化物的去除率分别可以达到60.96%和35.27%。
文摘Three heteropoly acids containing different amounts of V and Mo have been prepared by multi-step method. The methed was simple, economic in raw materials’ cost, and with relatively higher yield. ICP, TGA, Potentiometric Titrations, Infrared, XRD and 51V NMR characterizations revealed that the compounds synthesized in present work had Keggin structure. The catalytic performance of the heteropoly acids obtained for the direct hydroxylation of benzene to phenol was also investigated, 26% phenol yield with more than 90% selectivity was obtained.
