논문 해외 국제전문학술지(SCI급) Experiment and numerical analysis of catalytic CO2 methanation in bubbling fluidized bed reactor
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2021-04
- 학술지명 ENERGY CONVERSION AND MANAGEMENT
- 발행처명 PERGAMON-ELSEVIER SCIENCE LTD
- 발행국가 해외
- 논문언어 외국어
홈페이지논문 초록 (Abstract)
This study experimentally and numerically investigated the hydrodynamics, reaction kinetics, and heat transfer of a bench-scale bubbling fluidized bed (BFB) reactor for CO2 methanation. A three-dimensional gas-solid Eulerian computational fluid dynamics (CFD) model coupled with a modified Syamlal-O'Brien drag model and reaction kinetics for Ni-based catalysts was developed. The CFD model was validated against experimental data for pressure, temperature, and gas composition at 1 bar and an inlet flow rate of 2 L/min with an inlet N-2 content of 77.5%. The axial pressure drop, solid volume fraction, temperature, gas composition, and bed-to-wall heat transfer coefficient (HTC) were compared for four inlet N-2 contents: 77.5%, 50%, 25%, and 0%. As the inlet N-2 content decreased, the mean bed temperature increased from 340 to 456 degrees C, the gas volume decreased owing to the reaction, the fluidizing number (ug/umf) decreased from 4.1 to 3.5, and the solid holdup increased. Consequently, the HTC increased from 327 to 386 W/m(2)/K. This study identified successfully the effects of hydrodynamics and reaction kinetics on HTC in the BFB for CO2 methanation.