Financing: Spanish Ministry of Science and Innovation
Duration: 2012-2015
Summary: The purpose of this work is to study conversion of char particles at high concentration of oxygen in a fluidised bed in order to contribute to the knowledge needed to develop new generations of boilers for oxy-fuel combustion of coal as well as integrated gasifiers for biomass, both based on fluidised bed technology and aiming at reduction of the emission of CO2 to the atmosphere. The following is aimed at: (i) determining the consequences of feeding oxygen of high concentration to a coal-fired fluidised-bed boiler, especially the temperature reached by the char particles under these circumstances; (ii) understanding the form of conversion of char in a fluidised bed oxi-gasifier for biomass (a gasifier fed with oxygen and with the CO2-rich off-gas from an oxyfuel boiler). The objective is to identify the differences between the mode of conversion of char in this situation, compared with conventional modes of operation. This knowledge should serve as a basis for the design of future oxi-gasifiers of biomass integrated into CO2 combustion plants (that is, oxy-gasifiers of a second generation).