SYNOPSIS : Pyrolysis of pulverized blomass was performed With a thermogravimetrlc analyzer ( TGA ) and a wire − mesh reactor ( WMR ) . Mass release characteristics during TGA pyrolysis were analyzed by a multi − component mode1 , and then distributions of kinetic parameters such as an activation energy and a 行equency factor were obtained fbr every biomass sample . It was shown that the distributions ofthe kinetic parameters were influenced by a condition for the TGA pyrolysis , i. e . , the

more »

... ial sample mass , in other words , the initial height of the sample bed fbrmed in a sample cup . Increashlg 三 nitial mass resultcd in} ess extensive mass release , and this was mainly due to chemical interaction between the nascent volatiles and the pyrdyzing solid within the bed . Among the sample used , a pine sawdust underwent such chemical interaction minimally , and therefore the distributions of the kinetic parameters was little affected by the initial sample mass , [ t was , moreover , fbund that the model predicted the mass release characteristics during the pyrolysis of the sawdust in WMR over a range ofheating rate from l to 1 , 000 K ! s . On the other hand , the model prediction for the WMR pyrolysis of a coffee residue was not successfUI , because the chemical interaction as mentioned abovc was eliminated in WMR ,