Reaction Chemistry and Kinetics of Corn Stalk Pyrolysis without and with Ga/HZSM-5

Ben Huang, Xinyue Xie, Yang Yang, Md Mahbubur Rahman, Xingguang Zhang, Xi Yu, Paula Helena Blanco Sanchez, Zhujun Dong, Yuqing Zhang, Anthony V Bridgwater, Junmeng Cai

Research output: Contribution to journalArticle

Abstract

The bifunctional Ga/HZSM-5 catalyst has been proven having the capability to increase the selectivity of aromatics production during catalytic pyrolysis of furan and woody biomass. However, the reaction chemistry and kinetics of pyrolysis of herbaceous biomass promoted by Ga/HZSM-5 is rarely reported. Pyrolysis–gas chromatography/mass spectrometry (Py–GC/MS) analysis and non-isothermal thermogravimetric analysis at four heating rates were carried out to investigate the decomposition behavior and pyrolysis kinetics of corn stalk without and with Ga/HZSM-5. The effective activation energies for corn stalk pyrolysis were calculated by using the Friedman isoconversional method. The Py–GC/MS analysis results indicated that the Ga/HZSM-5 catalyst had a high selectivity toward producing the aromatic chemicals of xylene, toluene and benzene, whereas the major products from non-catalytic pyrolysis of corn stalk were oxygenated compounds. The presence of Ga/HZSM-5 could significantly reduce the effective activation energies of corn stalk pyrolysis from 159.9–352.4 kJ mol−1 to 41.6–99.8 kJ mol−1 in the conversion range of 0.10–0.85.
Original languageEnglish
Number of pages10
JournalJournal of Thermal Analysis and Calorimetry
Early online date7 Dec 2018
DOIs
Publication statusE-pub ahead of print - 7 Dec 2018

Bibliographical note

© Springer Nature B.V. 2018. The final publication is available at Springer via http://dx.doi.org/10.1007/s10973-018-7962-8

Keywords

  • Catalytic pyrolysis
  • Biomass
  • Kinetics
  • Isoconversional kinetic analysis
  • PyGC/MS
  • TG

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