광촉매 TiO2를 코팅한 다공성 나선형 판을 설치한 원통형 UV 반응기에 의한 Toluene, Acetone, Methyl Mercaptan의 분해특성

Abstract

Photocatalytic Decomposition Characteristics of Toluene, Acetone, and Methyl Mercaptan by Cylinderical UV Reactor Installed with TiO2-Coated Perforated Helical Plane

Jin-Woo Jeon

Department of Chemical Engineering, The Graduate School, Pukyong National University

Abstract

The photocatalytic decomposition characteristics of toluene, acetone, and methyl mercaptan by cylinderical UV reactor installed with TiO2-coated perforated plane were investigated. Photocatalytic decomposition area in UV reactor was increased about 2.2 times by installing the TiO2-coated perforated plane in the UV reactor. Toluene, acetone, and methyl mercaptan was decomposed efficiently owing to the synergistic effect of photochemical oxidation the ozone and TiO2 photocatalytic oxidation. Residual ozone produced by UV254+185nm lamp installed in the first half of the reactor was removed by UV254nm lamp in the later of reactor. Residual ozone concentration was reduced to 95% by using two UV254nm lamps, residual ozone concentration were measured to 0.05 ppmv by using three UV254nm lamp. Photocatalytic decomposition characteristics of toluene, acetone, and methyl mercaptan were compared by the factors such as UV lamp wavelength, relative humidity, linear velocity, inlet concentration, oxygen concentration. The photocatalytic decomposition kinetic of toluene, acetone, and methyl mercaptan fitted well on Langmuir-Hinshelwood (L-H) kinetics equation. When the inlet load of toluene was 968.0 g/m3․day, acetone was 2337.0 g/m3․day, and methyl mercaptan was 2419.8 g/m3․day, their elimination capacity were obtained to be 618.0 g/m3․day, 1041.2 g/m3․day, and 2419.8 g/m3․day, respectively. Also, it was applied to impact factor to examine the effect of each other for the binary vapors consisting of toluene, acetone, and methyl mercaptan. Impact factors for toluene mixed with acetone and methyl mercaptan were 0.46-0.52 and 0.67-0.81, respectively. Toluene mixed with acetone was appeared higher effect of inhibition than methyl mercaptan. Impact factor of acetone mixed with toluene and methyl mercaptan was 0.10-0.17 and 0.27-0.41, respectively. Acetone mixed with toluene was appeared higher effect of inhibition than methyl mercaptan. Impact factor of methyl mercaptan mixed with toluene and acetone was 0.85-0.99 and 0.95-0.99, respectively. Methyl mercaptan mixed with toluene was appeared higher effect of inhibition than acetone.