내부순환식 다판막 기포탑 반응기와 Fe-EDTA 균일질 촉매를 이용한 매립장 발생가스로부터 메탄 / 이산화탄소 회수에 관한 연구

Abstract

ABSTRACT

A study on the recovery methane and carbon dioxide from landfill gas purification by multi panel bubble lift column reactor utilizing Fe-EDTA liquid catalyst

Song, Jin Young Advisor : Prof. In Hwa Lee, Ph.D. Department of Environmental Engineering, Graduate School of Chosun University

Multi panel bubble lift column reactor was designed and evaluate optimum conditions to recover methane from landfill gas. To evaluate optimum conditions following experiments carried out, RTD analysis for reactor and CO2 stripping rate dependency on the over flow liquid height, CO2 stripping rate dependency on the absorbent solutions, CO2 stripping rate dependency on the temperature of absolvent solutions, CO2 stripping rate dependency on the inflow aeration rate, CO2 stripping rate dependency on the ultrasound intensity were examined. From the results of RTD analysis for Lab. scale multi panel bubble lift column reactor, it was known that the 40 mm of over flow liquid height and 1.5 L/min of air flow rate gave the fastest circulating speed of liquid in reactor. In case of Pilot scale multi panel bubble lift column reactor, 40mm of over flow liquid height and 30 L/min of air flow rate gave the fastest circulating speed of liquid in reactor. In case 45% of CO2 and 55% of CH4 was injected into Lab. scale multi panel bubble lift column rector, 28% of CO2 and 62% of CH4 was exhausted. The component of Landfill gas is 38% of CO2, 62% of CH4 and 69ppm H2S. As it was injected into Pilot scale multi panel bubble lift column reactor, 24% of CO2 and 72% of CH4 is thrown off. H2S was not detected(less than 0.25ppm). By using city water, Na2CO3 solutions and Fe-EDTA, 45% of CO2 45% and 55% of was injected in separate. City water throws off 28% of CO2, Na2CO3 solutions emits 27% of CO2 and Fe-EDTA gives off 27% of CO2.