Valorisation of rice husks and bean straws through fuel pellets production: an experimental and modelling approach

  • C. Gutierrez-Antonio Universidad Autónoma de Querétaro
  • N. Hernández-Neri Universidad Autónoma de Querétaro
  • J.F. García-Trejo Universidad Autónoma de Querétaro
  • A.A. Feregrino-Pérez Universidad Autónoma de Querétaro
  • M. Toledano-Ayala Universidad Autónoma de Querétaro
Keywords: fuel pellets, biomass, waste valorisation, bean straw, rice husks.


Worldwide, agricultural wastes represent an environmental problem due to their high volumes and inadequate disposal. Due to this, valorization of these wastes has been studied, being the production of biofuels a promising option. In particular, rice husks were proposed to produce fuel pellets, buy they do not fulfill the ISO 17225-6 standard due to its elevated ash content; thus, it is required to mix them with other wastes available in the same region. In Mexican states where rice is produced also bean is cultivated, whose residues are not used and have an elevated content of volatile solids. Therefore, the objective of this research is to produce fuel pellets from rice husk and bean straws that meet ISO 17225-6 standard. For this, the densification was carried out using three levels of moisture content and mixing ratios of the biomasses. Based on the experimental data, optimal densification conditions were found through a response surface analysis. Results show that fuel pellets produced from bean straw (90%) and rice husk (10%) with 15.0% of moisture content fulfill ISO 17225-6 standard.  At these conditions, fuel pellets have calorific power of 3,645.78 kcal/kg, 6.98 ash, 9.76% final moisture, 610.78 kg/m3 bulk density, and 99.51% durability.


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How to Cite
Gutierrez-Antonio, C., Hernández-Neri, N., García-Trejo, J., Feregrino-Pérez, A., & Toledano-Ayala, M. (2022). Valorisation of rice husks and bean straws through fuel pellets production: an experimental and modelling approach. Revista Mexicana De Ingeniería Química, 21(2), Alim2679.
Food Engineering

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