Gasification is a process of thermal conversion of solid carbonaceous materials into a gaseous fuel called syngas. Coal gasification is an efficient technology for a range of systems for producing low emissions electricity and other high value products such as chemicals, synthetic fuels, etc.
The paper presents the ThyssenKrupp’s PRENFLO gasification process which is designed to utilize wide spectrum of feedstock like torrefied biomass, low and high rank coals, petcoke. etc. The process is characterized by (i) a pressurized gasification reactor, where coal devolatilisation and partial oxidation and gasification of coal char and volatiles take place and by (ii) syngas quenching and cooling section, where two different designs are available, namely convective heat recovery boiler with steam generation and direct water quench.
The recent development of the PRENFLO process is reviewed. Pilot- and industrial-scale plants are presented. The main design steps required for an industrial scale design are introduced. Special attention is given to the process modeling; including global thermodynamic calculation as well as detailed CFD based simulation of the gasifier’s reactor and of the syngas quench section.
Paper presented at 12th Int. Conference on Energy for a Clean Environment, Lisbon, 2015 (pdf)