《SCR脱硝催化剂失活及其原因研究》.pdf

39 6 V o.l 39 No. 6 2011 6 Journal of Fuel Chem istry and T echno lo y Jun. 2011 : 20 11) SCR 商雪松, 陈进生, 赵金平, 张福旺, 徐 亚, 徐 琪 (, 361021) : SCR( Selective catalytic reduction) X , , , ( T iO ), 2 , , ( t 650 ), , : ; ; ; : O643. 36 : A D iscussion on the deactiva tion o f SCR den itrifica tion ca ta lyst and its reasons SHANG X ueson , CHEN Jinshen , ZHAO Jinp in , ZHANG Fuw an , XU Y a, XU Q i ( Ins titute of Urban E nv ironm ent, Ch inese A cademy of Sc iences. X iam en 361021, Ch ina) A bstract: The denitrification behaviors of fresh and used honey comb SCR cataly sts w ere compared and the deactivation reasons w ere analyzed by usin Fourier transformation infrared spectra ( FTIR ), N2 adsorption/ desorption, X ray diffraction ( XRD ), and scannin electron m icroscope ( SEM ). The results show that the functional roups on the surface of the used cataly st are chan ed and the specific surface area of the used catalyst decreases ser iously. M oreover the T iO cry stallite of used cataly st is chan ed and som e nanoparticles a re ate 2 on the surface of the used cataly s.t The reason of the deactivation of use cataly st is the unexpected h i h tem perature ( e. . t 650 ). O therw ise, thew ater so lub le ions, arsen ic and phosphorus in the deposit on the surface of the used cataly st can also affect the catalytic activity. K ey w ords: SCR; cataly st; deactivation; evaluation , , SCR , , SCR , [ 1] , , , , , (A s) NO ,