The restriction on sulfur level in gasoline has been increasingly tightened. The U.S.Tier 22222 regulation requires a reduction from average 340ppm to 30ppm from 2004 to 2008. Recently significant progress has been ma...The restriction on sulfur level in gasoline has been increasingly tightened. The U.S.Tier 22222 regulation requires a reduction from average 340ppm to 30ppm from 2004 to 2008. Recently significant progress has been made in effective high sulfur removal, such as post treatment of FCC gasoline by selective hydrotreating, S Zorb sulfur removal technology, OATS process etc. The sulfur content of FCC gasoline can be deceased to less than 10ppm. With regard to gasoline pool composition in China, it is very important to look for effective desulfurization processes that are simple, straightforward, with less hydrogen consumption. Post-treatment of FCC gasoline is a preferred option. From the point of view of comprehensive utilization, alkylation, polymerization, isomerisation etc. can be added to desulfurization process to meet the requirement of ultra low sulfur, premium.展开更多
Density functional theory calculations are carried out to identify various configurations of oxygen molecules adsorbed on the Au-doped RuO2(110) surface. The binding energy calculations indicate that O2 molecules are ...Density functional theory calculations are carried out to identify various configurations of oxygen molecules adsorbed on the Au-doped RuO2(110) surface. The binding energy calculations indicate that O2 molecules are chemically adsorbed on the coordinatively unsaturated Ru(Rucus) sites and the bridge oxygen vacancies on the Au sites. Transition state calculations show that O^* can exist on the Rucus site by O2^* dissociation and diffusion. The calculations of the reaction path of CO indicate that the reaction energy barrier of CO adsorbed on Au with lattice oxygen decreases to 0.28 eV and requires less energy than that on the undoped structure.展开更多
文摘The restriction on sulfur level in gasoline has been increasingly tightened. The U.S.Tier 22222 regulation requires a reduction from average 340ppm to 30ppm from 2004 to 2008. Recently significant progress has been made in effective high sulfur removal, such as post treatment of FCC gasoline by selective hydrotreating, S Zorb sulfur removal technology, OATS process etc. The sulfur content of FCC gasoline can be deceased to less than 10ppm. With regard to gasoline pool composition in China, it is very important to look for effective desulfurization processes that are simple, straightforward, with less hydrogen consumption. Post-treatment of FCC gasoline is a preferred option. From the point of view of comprehensive utilization, alkylation, polymerization, isomerisation etc. can be added to desulfurization process to meet the requirement of ultra low sulfur, premium.
基金Project supported by the Natural Science Foundation of Anhui Province,China(Grant Nos.KJ2018A0588 and KJ2019A0879)
文摘Density functional theory calculations are carried out to identify various configurations of oxygen molecules adsorbed on the Au-doped RuO2(110) surface. The binding energy calculations indicate that O2 molecules are chemically adsorbed on the coordinatively unsaturated Ru(Rucus) sites and the bridge oxygen vacancies on the Au sites. Transition state calculations show that O^* can exist on the Rucus site by O2^* dissociation and diffusion. The calculations of the reaction path of CO indicate that the reaction energy barrier of CO adsorbed on Au with lattice oxygen decreases to 0.28 eV and requires less energy than that on the undoped structure.
