Thesis (M.Eng)--Chulalongkorn University, 2011

Carbohydrate is an organic compound that could be an alternative source of fuel gas. Hydrothermal treatment makes use of high temperature and pressure to decompose organic compounds. In this research, steamed rice which is considered as simulated waste carbohydrate is subject to the hydrothermal treatment process for producing fuel gas with a tubular reactor in the batch system with a reaction temperature range of 300 to 400°C and heating rate ranging from 8 to 13°C/min. The result shows high temperature and high heating rate would promote the hydrogen production rate. In addition, solid residue, which is agglomerates of carbonaceous microsphere, was examined for its potential utilization. In part of continuous process, steamed rice was used as a feed stock which used the continuous system. There investigate on the effect of temperature in range of 400, 500 and 600oC and particle size in range of 60, 140 and 250 µm. The result is shown that the small particle size and high temperature could be produced the highest gas product. When using the H2O2 as an additive, it could be promoted carbon gasification efficiency in all experiment because of H2O2 was promoted oxidation process.