High-temperature air/steam gasification for medium or High calorific value sysgas production
Use of highly preheated gasifying agent (Air/steam) provides additional energy into the gasification process. This leads to a very uniform temperature profile in the gasifier, which can be called as Homogenous Gasifier. The developed homogenous gasifier includes two reactors: a homogenous gasifier with pebble-bed and a high-temperature air generator, using either a regenerative heater or a combustor with oxygen enhancement. Development, testing and numerical simulations of the THG in KTH have shown that based on the agent temperature, two distinct ignition modes are identified: the reaction-controlled and convective-controlled mode. The results also show increasing of the air temperature, it can be obtained a higher gasification rate, a fast ignition front rate, and a higher molar fractions of fuel gases (CO, H2 and CmHn), thus a higher LHV. Moreover, there exists a critical air temperature above which the preheating is no longer efficient if the gasification purpose is to maximise the yield of gaseous products. At a higher air flow rate, CO/CO2 ratio is increased. Again, the ignition front rate is increased. A increasing of the oxygen concentration leads to a larger peak value of the fuel gases concentrations, and a fast gasification rate, and larger ignition front rate. The biomass and plastic waste are tested and the characteristic is achieved. It demonstrated the flexible fuel capabilities of the gasifier design
gasification biomass fuel pebble-bed gasifier fixed bed high- temperature air Mathematical modelling
Wlodzimierz BLASIAK Weihong YANG
Royal Institute of Technology,Brinvllv(a)gen 23,S-10044 Stockholm,Sweden
国际会议
广州
英文
953-959
2008-12-03（万方平台首次上网日期，不代表论文的发表时间）