Nature of mathematical model in lignocellulosic biomass pyrolysis process kinetic using volatile state approach

Background: The determination of kinetic parameters of lignocellulosic biomass pyrolysis has been widely investigated through a solid-state approach using Kissinger-Akahira-Sunose (KAS) and Flynn-Wall-Ozawa (FWO) methods. Unfortunately, the result of activation energy continues to escalate along with temperature and con-version which contradict the behavior of biomass pyrolysis kinetic. Hence, this study offers a new approach to overcoming those problems, namely volatile state approach.Methods: The calculation was conducted by modifying solid-state KAS and FWO leading to volatile state KAS and FWO. The calculation for conversion in this approach starts from 0% and ends at not 100%. The data from Anca-Couce et al. were utilized and they were then plotted and calculated following volatile state KAS and FWO methods to acquire kinetic parameters. The difference in activation energy between the volatile state and solid-state was finally compared.Significant Findings: Following the results, the activation energy obtained from volatile state KAS and FWO methods initially has an increasing value but then lessens as the pyrolysis temperature and conversion progress. This is in line with the involved activation energy should decrease at higher conversion. Therefore, the findings conclude that the volatile state approach contributes to revealing the nature of biomass pyrolysis with more logical and reasonable results.

Automated summary

This study introduces a new volatile state approach to determine the kinetic parameters of lignocellulosic biomass pyrolysis, which provides more logical and reasonable results compared to traditional solid-state methods.