EXPERIMENTAL RESULTS FROM THE ALLOTHERMAL BIOMASS GASIFIER MILENA

ECN is developing an indirectly heated (allothermal) biomass gasification process (Milena), optimized for the production of Synthetic Natural Gas (SNG). The methane rich gas from the gasifier is cleaned and the carbon monoxide and hydrogen in the gas are converted into methane by a catalyst. After removal of carbon dioxide and water pure methane is available to inject into the natural gas grid. Some operational parameters, like gasifier temperature and bed material, have influence on the gas composition and therefore on the overall efficiency to SNG. Experiments in a 30 kW th Milena gas ifier were done to determine the optimal operating conditions for SNG production. The results of these tests are presented in this paper.