Challenges in Kinetic Parameter Determination for Wheat Straw Pyrolysis

Wheat straw is a renewable agricultural by-product that currently underutilized in the production of bioenergy and bioproducts due to its high ash content, as well transport costs low volumetric energy density. The thermogravimetric analysis this material produces derivative curves with single broad peak, making it difficult identify three conventional pseudo-components (cellulose, hemicellulose, lignin), which resolved using second determine inflection points. Model-fitting methods isoconversional were applied degradation kinetics wheat at two different particle sizes, reference feedstock (beech wood), obtained values used divide be compared experimental data. Seven pyrolysis reaction networks from literature given similar treatment provides best estimation actual process for case feedstocks under study. impact potassium content was considered by comparing original pathway modification dependent on an estimated optimum value.