Paper Information

Title:  SYNTHESIS AND ACTIVITY TESTS OF NANO PEROVSKITE CATALYSTS FOR CO COMBUSTION
Type: PAPER
Author(s): SEYFI BAHMAN,BAGHALHA MORTEZA*
 
 *DEPARTMENT OF CHEMICAL AND PETROLEUM ENGINEERING, SHARIF UNIVERSITY OF TECHNOLOGY, TEHRAN, IRAN
 
Name of Seminar: COMBUSTION CONFERENCE OF IRAN
Type of Seminar:  CONFERENCE
Sponsor:  ANJOMANE EHTERAGHE IRAN
Date:  2008Volume 2
 
 
Abstract: 

MODIFIED PEROVSKITE-TYPE OXIDES WERE SYNTHESIZED BASED ON TWO DIFFERENT METHODS, NAMELY CO-PRECIPITATION AND CONVENTIONAL CITRATE. THE SYNTHESIZED PEROVSKITE MATERIALS HAD THE NOMINAL COMPOSITIONS OF LACOO3, LACO0.8CU0.2O3, LA0.8SR0.2CO0.8CU0.2O3, LA0.8M0.2FE0.8O3 (WHERE M=CE AND SR). THE CATALYTIC ACTIVITY OF PEROVSKITE SAMPLES TOWARD CO COMBUSTION WERE MEASURED USING A GAS MIXTURE CONTAINING N2/O2/CO IN THE FOLLOWING PROPORTIONS 97/1/2. THE PREPARED PEROVSKITE SAMPLES WERE CHARACTERIZED BY SEM, NITROGEN ADSORPTION (BET), XRF AND XRD ANALYSES. ALL THE CATALYSTS DISPLAYED GOOD STABILITY ABOVE 600°C AND A HIGH ACTIVITY TOWARD CO COMBUSTION. OUR NOVEL PROPOSED PEROVSKITE COMPOSITION, NAMELY LA0.8SR0.2CO0.8CU0.2O3 SHOWED THE HIGHEST ACTIVITY FOR ACHIEVING CO CONVERSION ABOVE 80%. WHILE HOMOGENEOUS GAS-PHASE COMBUSTION OF CO REQUIRES TEMPERATURES IN EXCESS OF 700°C TO ACHIEVE FAIR KINETICS, OUR NOVEL CATALYST SAMPLE ACHIEVED 100%CO COMBUSTION AT 355°C.

 
Keyword(s): COMBUSTION, PEROVSKITE, CATALYST, CO, LANTHANUM, COBALT, ACTIVITY
 
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