In this study, sewage sludge is converted to syngas by co-gasification with palm kernel shells due to their complementary effects. The basic characteristics of fuels are analyzed, and a thermogravimetric analysis integrated with Fourier transform infrared spectroscopy is used to explore the co-pyrolysis/gasification reaction of sewage sludge and palm kernel shells. The results are then used for an FWO activation energy estimation, synergistic effect analysis, and gas yield analysis. The results show that a synergistic effect exists and that sewage sludge in the blended fuel exceeding 30% will increase the C[dbnd]O band, C[dbnd]C bond, C–O, and C–C bond yields. Different synergistic steps are identified, and the average activation energy for the blended fuels is shown to be lower than that in pure feedstocks. A 1 kWth continuous-type fluidized-bed gasifier is designed, and the optimal operating conditions necessary to obtain the maximum H2/CO ratio and maximum normalized H2 concentration are found through the Taguchi method. The CO2/(CO2+H2O) ratio was the most dominant parameter in the selected conditions, and 70%CO2/30%H2O had the best performance. In addition, catalyst addition had the second most dominant effect, where a maximum H2/CO ratio of 0.563 and a maximum normalized H2 concentration of 32.2% were obtained.
All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Building and Construction
- Mechanical Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering