화학공학소재연구정보센터
Journal of Supercritical Fluids, Vol.142, 32-37, 2018
Conversion of guaiacol in supercritical water gasification: Detailed effect of feedstock concentration
The effect of feedstock concentration on the gasification characteristics of guaiacol, a model compound for lignin, in supercritical water was investigated using a laboratory-scale continuous-flow reactor. The reaction temperature, pressure, and residence time used were 600 degrees C, 25 MPa, and 94 s, respectively. A reaction model was developed and kinetic parameters were determined so that experimental results could be reproduced. The carbon gasification efficiency (CGE) and TOC yield were not affected by the initial concentration of guaiacol. Solid yields increased with feedstock concentration, reflecting an order of reaction greater than one for solid production. A reaction model was developed and the reaction rate constants were determined successfully to reproduce experimental results. The decomposition rate constant was determined as 0.0718 +/- 0.0403 /s and was found to be in good agreement with the previous study. The reaction order for the solid production was determined to be 1.25.