An experimental study on co-gasification of coal?biomass blended chars with CO_2

摘要

In a lab scale tube furnace, mixtures of coal andbiomass were co-pyrolyzed under nitrogenatmosphere condition to become chars. Thenthese chars were co-gasified with CO_2 underisothermal conditions. CO concentration wasmeasured by a real time gas analyser with NDIR(Non-dispersive infrared) CO and CO_2 sensor.The furnace temperature was varied between900-1100°C. The Volume Reaction Model(VRM), Shrinking Core Model (SCM) andRandom Pore Model (RPM) were used tointerpret the experiment data. The activationenergy (E_a) and frequency factor (A) of coal andbiomass char-CO_2 reaction were determinedusing the Arrhenius equation. As a result, thereactivity on co-gasification of blended chars wasimproved than single coal char because ofcatalysis of alkaline minerals which wereincluded in biomass char.