The Study of NOx Removal Efficiency by NH3 over V2O5/TiO2

서지정보

ㆍ발행기관 : 대한군상담학회 ㆍ수록지정보 : 대한군상담학회 학술대회지
ㆍ저자명 : Keon Joo Lee

목차

1. INTRODUCTION

영어 초록

The selective catalytic reduction (SCR) reaction of promoter catalysts was investigated in this study.
TiO2 of pure anatase type was used as support. Activation measurement of prepare catalysts practiced
on a fixed reactor packing by the glass bead after fill up catalysts in 1/4 inch stainless tube. The
reaction temperature was measured by K-type thermocouple and catalyst was heated by electric
furnace. The standard compositions of the simulated flue gas mixture in this study were as follows :
NO 1780ppm, NH3 1780ppm, O2 1%, and N2 as balance gas. In this study, gas analyzer was used to
measure the outgassing gas. Catalyst bed was handled for 1hr at 450℃, and the reactivity of the
various catalyst was determined in a wide temperature range. Conversion of NH3/NO ratio was
practiced at 1, 1.5, 2 respectively and conversion of O2 concentration was practiced at respectively
and the space velocity were as follows : 10,000, 15,000, 17,000 hr-1 respectively.
It was found that the maximum conversion temperature range was in a 50℃, and it was also very
sensitive at space velocity, O2 concentration, and NH3/NO ratio. It was found that the maximum
conversion temperature of (W, Mo, Sn)-V2O5/TiO2 catalysts was broaden. Specially WO3-V2O5/TiO2
catalyst appeared nearly 100% conversion at not only above 300℃ but also below temperature of 25
0℃. At over 300℃, NH3 oxidation was decreased as decreasing of surface excess oxygen. Also
WO3-V2O5/TiO2 catalyst does hardly appear to effect on space velocity, O2 concentration and NH3/NO ratio.

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