Effect of Particle Characteristics, Kinetics and Transport Phenomena on the Prediction of Particle Mass Loss and Products Yields During Biomass Fast Pyrolysis: Article No. 105786

Mario Sanchez, Juan Maya, Brennan Pecha, Farid Chejne, Adriana Quinchia-Figueroa

Research output: Contribution to journalArticlepeer-review

2 Scopus Citations

Abstract

A low computational cost model for the pyrolysis of biomass anisotropic particles was used to study the effect of thermal conductivity of the particle, CRECK kinetic scheme implementation, intraparticle secondary reactions, heats of reaction, and advection on particle conversion prediction. The model considers a shrinking anisotropic cylindrical particle with biomass pseudo-components, the appearance of liquid intermediates, intra-particle mass and heat transport and secondary reactions of volatiles. The model was validated against oak and birchwood single particle experiments. More accurate predictions for mass loss evolution are found when considering the change of the particle thermal conductivity anisotropy with conversion and the temperature dependency of the thermal conductivities of the biomass and the gas phase, compared to ignoring these phenomena. The CRECK biomass pyrolysis reaction scheme provides insights into the effect of biomass composition on the evolution of the liquid intermediate phase allowing future studies about the presence of heavy compounds in the bio-oil and other phenomena such as aerosol ejection. Secondary intraparticle vapor phase reactions showed a negligible effect in volatiles conversion while heterogeneous reactions slightly overestimate its conversion. Heats of reaction and product advection are important for accurate prediction of particle mass loss.
Original languageAmerican English
Number of pages13
JournalJournal of Analytical and Applied Pyrolysis
Volume168
DOIs
StatePublished - 2022

NREL Publication Number

  • NREL/JA-2800-82600

Keywords

  • anisotropy
  • biomass
  • liquid intermediate
  • pyrolysis
  • single particle model

Fingerprint

Dive into the research topics of 'Effect of Particle Characteristics, Kinetics and Transport Phenomena on the Prediction of Particle Mass Loss and Products Yields During Biomass Fast Pyrolysis: Article No. 105786'. Together they form a unique fingerprint.

Cite this