NOx emission abatement catalysts V 2O 5 supported on various TiO 2 including anatase, rutile and mixture of both were investigated with various physico\|chemical measurements such as BET, NH\-3\|TPD, NARP, XRD and ...NOx emission abatement catalysts V 2O 5 supported on various TiO 2 including anatase, rutile and mixture of both were investigated with various physico\|chemical measurements such as BET, NH\-3\|TPD, NARP, XRD and so on, and the effect of TiO\-2 surface properties on the SCR(selective catalytic reduction) activity of V\-2O\-5/TiO\-2 catalysts was studied. It was found that the TiO\-2 surface properties had strong affect on the SCR activity of V\-2O\-5/TiO\-2 catalysts. The stronger acidic property resulted in the higher exposure of active sites as well as the higher SCR activity.展开更多
Polymer/montmorillonite complexes were prepared via intercalating polymers of low molecular weight into layers of montmorillonite and evaluated for their interactions with rosin acid. Three polymers from various amine...Polymer/montmorillonite complexes were prepared via intercalating polymers of low molecular weight into layers of montmorillonite and evaluated for their interactions with rosin acid. Three polymers from various amines modified by epichlorohydrin and an acidified diethylenetriamine were separately intercalated into montmorillonite via direct solution intercalation. X-ray diffraction patterns are performed to obtain information about the intercalation of these agents. The examination revealed that it was feasible for the direct intercalation of polymers, while hard for the unmodified diethylenetriamine. Adsorption isotherm curves were established to assess the efficiency of the various montmorillonites including the intercalated montmorillonites, the simple mixtures of the corresponding intercalation agents and ordinary montmorillonite in removing pitch from water solution. From the adsorption behavior of various samples, it was found that the interaction of the montmorillonite with pitch was not only through van der Waals attraction, but also through electrostatic interactions. Both the organo-philic and the surface electrostatic properties of the montmorillonites are important for successful pitch control.展开更多
The various properties of bentonite samples with different sources and their synergistic retention effect with CPAM on wheat straw pulps were investigated. The investigated properties of bentonite included adsorptive ...The various properties of bentonite samples with different sources and their synergistic retention effect with CPAM on wheat straw pulps were investigated. The investigated properties of bentonite included adsorptive capacity based on methylene blue, cation-exchange capacity, swelling volume, colloidal volume, particle size and charge properties. The results show that particle size is the most important properties of bentonite for its synergistic retention effect with CPAM. Using Wyoming type sodium bentonite without drying after modification can obtain the excellent furnishes retention.展开更多
文摘NOx emission abatement catalysts V 2O 5 supported on various TiO 2 including anatase, rutile and mixture of both were investigated with various physico\|chemical measurements such as BET, NH\-3\|TPD, NARP, XRD and so on, and the effect of TiO\-2 surface properties on the SCR(selective catalytic reduction) activity of V\-2O\-5/TiO\-2 catalysts was studied. It was found that the TiO\-2 surface properties had strong affect on the SCR activity of V\-2O\-5/TiO\-2 catalysts. The stronger acidic property resulted in the higher exposure of active sites as well as the higher SCR activity.
文摘Polymer/montmorillonite complexes were prepared via intercalating polymers of low molecular weight into layers of montmorillonite and evaluated for their interactions with rosin acid. Three polymers from various amines modified by epichlorohydrin and an acidified diethylenetriamine were separately intercalated into montmorillonite via direct solution intercalation. X-ray diffraction patterns are performed to obtain information about the intercalation of these agents. The examination revealed that it was feasible for the direct intercalation of polymers, while hard for the unmodified diethylenetriamine. Adsorption isotherm curves were established to assess the efficiency of the various montmorillonites including the intercalated montmorillonites, the simple mixtures of the corresponding intercalation agents and ordinary montmorillonite in removing pitch from water solution. From the adsorption behavior of various samples, it was found that the interaction of the montmorillonite with pitch was not only through van der Waals attraction, but also through electrostatic interactions. Both the organo-philic and the surface electrostatic properties of the montmorillonites are important for successful pitch control.
文摘The various properties of bentonite samples with different sources and their synergistic retention effect with CPAM on wheat straw pulps were investigated. The investigated properties of bentonite included adsorptive capacity based on methylene blue, cation-exchange capacity, swelling volume, colloidal volume, particle size and charge properties. The results show that particle size is the most important properties of bentonite for its synergistic retention effect with CPAM. Using Wyoming type sodium bentonite without drying after modification can obtain the excellent furnishes retention.
