PHOTOCATALYTIC OXIDATION OF MEK IN THE AIR STREAM IN A TITANIA-BASED FLUIDIZED BED REACTOR

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HAJAGHAZADEH M.; KAKOOEI H.; SOTUDEH GHAREBAGH R.; GOLBABAEI F.

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Seminar Paper

Paper Information

Seminar: IRANIAN SEMINAR OF ORGANIC CHEMISTRY
Year:2014 | Issue:22

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Title

PHOTOCATALYTIC OXIDATION OF MEK IN THE AIR STREAM IN A TITANIA-BASED FLUIDIZED BED REACTOR

Author(s)

HAJAGHAZADEH M. | KAKOOEI H. | SOTUDEH GHAREBAGH R. | GOLBABAEI F. | Issue Writer Certificate

Keywords

PHOTOCATALYTIC OXIDATION

FLUIDIZED BED

TITANIA

METHYL ETHYL KETONE

Abstract

PHOTOCATALYTIC OXIDATION OVER TITANIUM DIOXIDE IS A PROMISING TECHNIQUE FOR DECONTAMINATION OF ORGANIC COMPOUNDS FROM AIR STREAM [1]. THIS PAPER REPORTS THE GAS-PHASE PHOTOCATALYTIC OXIDATION (PCO) OF METHYL ETHYL KETONE (MEK) IN A FLUIDIZED BED REACTOR (FBR) OVER TIO2/SIO2 CATALYST. DESIRED AMOUNTS OF DEGUSSA P25 WERE COATED ON SILICA PARTICLES BY THE DIP COATING METHOD TO OBTAIN 5-20WT% CATALYSTS [2]. TIO2/SIO2 CATALYST WAS CHARACTERIZED USING XRD, SEM AND BET METHODS. THE CONVERSION OF MEK AND SELECTIVITY TO CO2 WERE CALCULATED ACCORDING TO DECOMPOSED MEK AND YIELDED CO2. THE PCO OF MEK ENHANCED WITH CHANGING FROM DRY TO HUMIDIFIED CONDITION BUT DECREASED WITH INCREASE OF RELATIVE HUMIDITY (RH) FROM 25% TO 65% [3]. THOUGH THE INCREASE OF RH FROM 25% TO 45% DECREASED THE CONVERSION OF MEK, SELECTIVITY TO CO2 IMPROVED. THE INCREASE OF MEK INITIAL CONCENTRATION IN THE RANGE OF 100-800 PPM DECREASED THE CONVERSION OF MEK OVER BOTH 5 AND 20WT% CATALYSTS, WHILE THE REACTION RATE DID NOT IMPROVE AFTER 400 PPM MEK. IN THE PCO OF 100-400 PPM MEK AT SUPERFICIAL GAS VELOCITY OF 2UMF USING THE CATALYSTS OF 5-20WT%, MAXIMUM CONVERSIONS WERE REACHED TILL THE USE OF 15 WT%. IN THE SAME EXPERIMENT WITH 4UMF, THE MAXIMUM CONVERSIONS DID NOT YIELD TILL THE USE OF 20WT% CATALYST. THOUGH THE INCREASE OF SUPERFICIAL GAS VELOCITY IN THE RANGE UMF-4UMF DECREASED THE CONVERSION OF 400 PPM MEK, THE CONVERSION DID NOT AFFECT MORE USING HIGHER LOADING OF CATALYST. THIS STUDY SHOWED THAT IN A TITANIA-BASED FBR THE PCO OF A GAS PHASE POLLUTANT ARE AFFECTED BY PARAMETERS SUCH AS RH, INITIAL CONCENTRATION, SUPERFICIAL GAS VELOCITY, AND TITANIA LOADING ON BED PARTICLES. ALSO, IT WAS SHOWN THAT THE INCREASE OF RH IMPROVED THE SELECTIVITY TO CO2 (AS A DESIRED PRODUCT), WHILE DETERIORATED THE MEK CONVERSION. IN CONCLUSION, THE EFFECT OF RH SHOULD BE JUDGED CONSIDERING BOTH SELECTIVITY TO CO2 AND CONVERSION. IN ADDITION, THE OPERATION OF A FBR AT THE LOWER VELOCITY AND MEDIUM CATALYST LOADING COULD DECONTAMINATE THE POLLUTED AIR TO LOWER CONCENTRATIONS.

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APA: Copy

HAJAGHAZADEH, M., KAKOOEI, H., SOTUDEH GHAREBAGH, R., & GOLBABAEI, F.. (2014). PHOTOCATALYTIC OXIDATION OF MEK IN THE AIR STREAM IN A TITANIA-BASED FLUIDIZED BED REACTOR. IRANIAN SEMINAR OF ORGANIC CHEMISTRY. SID. https://sid.ir/paper/913798/en

Vancouver: Copy

HAJAGHAZADEH M., KAKOOEI H., SOTUDEH GHAREBAGH R., GOLBABAEI F.. PHOTOCATALYTIC OXIDATION OF MEK IN THE AIR STREAM IN A TITANIA-BASED FLUIDIZED BED REACTOR. 2014. Available from: https://sid.ir/paper/913798/en

IEEE: Copy

M. HAJAGHAZADEH, H. KAKOOEI, R. SOTUDEH GHAREBAGH, and F. GOLBABAEI, “PHOTOCATALYTIC OXIDATION OF MEK IN THE AIR STREAM IN A TITANIA-BASED FLUIDIZED BED REACTOR,” presented at the IRANIAN SEMINAR OF ORGANIC CHEMISTRY. 2014, [Online]. Available: https://sid.ir/paper/913798/en

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