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Effective adsorptive denitrogenation from model fuels over yttrium ion-exchanged Y zeolite

Chinese Journal of Chemical Engineering 2020年第2期28卷 414-419页

作者： Fuping Tian Xin Sun Xinyi Liu Hongluan Zhang Jiaxu Liu Hongchen Guo Yifu Zhang Changgong Meng School of Chemistry State Key Laboratory of Fine ChemicalsDalian University of TechnologyDalian 116024China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024China

The adsorption removal of indole and quinoline in octane with and without toluene over zeolites NaY and Yttrium ion-exchanged Y(YY)using batch adsorption experiments was studied at 25℃and 0.1 *** was prepared by treating NaY with Y(NO3)3 solution twice via liquid ion-exchange *** and YY were both characterized by XRD,SEM,N2 adsorption,XRF,NH3-TPD,and pyridine-FTIR *** isotherms of indole,quinoline and toluene in octane were conducted at 25.0℃to explain the influence of toluene on nitrogen removal over NaY and *** partial destruct of the crystalline structure of NaY was observed after the introduction of yttrium ion,which led to an evident decline in BET surface area and pore volume of *** Br?nsted acidity and medium Lewis acidity were introduced by yttrium *** the specific surface area and pore volume of YY were much lower than those of NaY,YY exhibited equivalent adsorption capacities for indole and quinoline as NaY in model fuels without *** the presence of 20 vol%toluene,however,YY exhibited much higher adsorption capacities for indole and quinoline than NaY,especially in the case of *** improved toluene-tolerant of YY was ascribed to the strong acid–base interaction between YY and quinoline and the decreased adsorption strength between YY and toluene.

关键词： Adsorptive denitrogenation Indole Quinoline Toluene Yttrium ion-exchanged Y zeolite

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Study on the protection of Er-doped phosphate glass waveguide surface in ion-exchange processing

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Science China(Technological Sciences) 2008年第7期51卷 1024-1030页

作者： HAN XiuYou CHU FengHong CAI HaiWen FANG ZuJie ZHAO MingShan Photonics Research Center School of Physics&Optoelectronic EngineeringDalian University of TechnologyDalian 116023China Optics and Information Lab Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China

A novel method, sputtering K9 glass film, is proposed to solve the surface corrosion of Er-doped phosphate glass during ion-exchange processing for optical waveguide fabrication. The corrosion causes are analyzed to be the intrinsically weak stabilization of phosphate glass structure, hydrophile and weakly acidic property of phosphate radical. Experimental results show that the K9 glass film could not only protect the Er-doped phosphate glass surface from being corroded but also give no influence on the waveguide fabrication. The effect of thickness of K9 glass film on the optical property of waveguide is also investigated and the op- timal thickness is found to be 60―80 nm. It provides a good base for further fabri- cation of active phosphate glass optical waveguide devices.

关键词： ion-exchanged waveguide Er-doped phosphate glass surface corrosion K9 glass film

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