STUDY ON GASIFICATION OF CORN STALK IN SUPERCRITICAL WATER

New data were obtained for production of CH4 by gasification of corn stalk in supercritical water in a continuous Inconel 625 flow reactor. The gasification reactions were carried out at 803-953 K, 24-40 MPa and residence time of 110-140 s. The effects of pressure, residence time, temperature on gasification efficiency were studied. The results indicated that pressure change had no significant influence on gasification efficiency. Higher temperature and longer residence time enhanced gasification efficiency, and lower temperature favored the production of H-2. The carbon gasification ratio and hydrogen gasification ratio were up to 97% and 132% at 953 K and 140 s, respectively, which demonstrated that corn stalk can be completely gasified in SCW.