The micro-spheric Bi_2WO_6 was synthesized by a simple one-step hydrothermal method. Bi_2WO_6 crystals were characterized using XRD, SEM, EDS and BET techniques. Bi_2WO_6, H_2O_2 and [HMIM][BF_4] served as catalyst, o...The micro-spheric Bi_2WO_6 was synthesized by a simple one-step hydrothermal method. Bi_2WO_6 crystals were characterized using XRD, SEM, EDS and BET techniques. Bi_2WO_6, H_2O_2 and [HMIM][BF_4] served as catalyst, oxidant and extracting agent in the oxidative desulfurization system(ODS), respectively. The influence of extraction agent type, oxidant usage, catalyst dosage, temperature, sulfur compound type and other factors on the oxidative desulfurization was studied in the present work. The experimental results demonstrate that Bi_2WO_6 possesses high activity for desulfurization of dibenzothiophene(DBT) and benzothiophene(BT). The desulfurization rate of DBT and BT in model oil could reach 98.1% in 80 minutes and 96.2% in 120min at 70℃, respectively. Moreover, the desulfurization performance of catalyst for DBT hardly changed after being recycled for 10 times.展开更多
By the study of absorption and fluorescence spectra and the lifetime of fluorescence at room and low temperatures of 2,6-dimethyl naphthalene dicarboxylate (DMN) in different concentrations of sulfuric acid, different...By the study of absorption and fluorescence spectra and the lifetime of fluorescence at room and low temperatures of 2,6-dimethyl naphthalene dicarboxylate (DMN) in different concentrations of sulfuric acid, different interactions between molecules of DMN and sulfuric acid have been observed. These interactions have been revealed by the absorption spectra of charge transfer complex in the ground state, emission of exciplex, absorption spectra of hydrogen bonding interaction, absorption and emission spectra after proton transfer and different lifetimes before and after protonation. The interaction mechanism of DMN and sulfuric acid through first the CT complex and exciplex then hydrogen bonding and finally proton transfer is proposed.展开更多
基金financial support of the Natural Science Foundation of China (Project No. 21003069)the Doctoral Fund of Liaoning Province (201501105)
文摘The micro-spheric Bi_2WO_6 was synthesized by a simple one-step hydrothermal method. Bi_2WO_6 crystals were characterized using XRD, SEM, EDS and BET techniques. Bi_2WO_6, H_2O_2 and [HMIM][BF_4] served as catalyst, oxidant and extracting agent in the oxidative desulfurization system(ODS), respectively. The influence of extraction agent type, oxidant usage, catalyst dosage, temperature, sulfur compound type and other factors on the oxidative desulfurization was studied in the present work. The experimental results demonstrate that Bi_2WO_6 possesses high activity for desulfurization of dibenzothiophene(DBT) and benzothiophene(BT). The desulfurization rate of DBT and BT in model oil could reach 98.1% in 80 minutes and 96.2% in 120min at 70℃, respectively. Moreover, the desulfurization performance of catalyst for DBT hardly changed after being recycled for 10 times.
基金Proiect supported by the National Natural Science Foundation of China.
文摘By the study of absorption and fluorescence spectra and the lifetime of fluorescence at room and low temperatures of 2,6-dimethyl naphthalene dicarboxylate (DMN) in different concentrations of sulfuric acid, different interactions between molecules of DMN and sulfuric acid have been observed. These interactions have been revealed by the absorption spectra of charge transfer complex in the ground state, emission of exciplex, absorption spectra of hydrogen bonding interaction, absorption and emission spectra after proton transfer and different lifetimes before and after protonation. The interaction mechanism of DMN and sulfuric acid through first the CT complex and exciplex then hydrogen bonding and finally proton transfer is proposed.
