Analysis of volatile compounds generated in the analytical pyrolysis of tomato plant (Solanum Lycopersicum) waste from the AGRUPAR greenhouses

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Sergio Homero Medina Romo
Washington Gonzalo Chiriboga Gavidia
Alejandro Javier Delgado Araujo
Washington Polibio Ruiz López

Abstract

Pyrolysis is a waste valorization method that has been extensively researched. The combined analysis of results generated by thermogravimetry (TGA) and analytical pyrolysis (Py-GC/MS) enables the characterization of waste and the assessment of its potential as a source of energy and value-added products. In this study, we conducted a first-time analysis of the volatile elements produced during the analytical pyrolysis of tomato plant waste from the greenhouses of the AGRUPAR-QUITO association. The objective was to determine its industrial usefulness. Elemental and proximate analyses were conducted using thermogravimetry, and the calorific value was quantified using the Dulong formula. The chemical structure percentages of the biomass were obtained through deconvolution using Origin software. Analytical pyrolysis was performed at eight temperatures ranging from 100 to 800°C, allowing us to examine the evolution of compounds grouped by their functional groups, as well as the major compounds present in each biomass. The findings show that biomass decomposition begins between 300 and 400°C, with the most volatile compounds produced around 500 to 600°C. During this temperature range, pyrolytic compounds exhibit a wide range of molecular weights. The highest yield of organic acids, ketones, alcohols, and furan derivatives occurs near 500°C, while the production of alkanes, alkenes, benzene derivatives, phenols, pyrroles, pyridines, and other nitrogen-containing compounds increases with temperature up to 700 and 800°C. Notably, key compounds like acetic acid, neophytadiene, and 1H-indole are formed. Overall, we conclude that tomato plant residues generate compounds with potential industrial uses.

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How to Cite
Medina Romo, S. H., Chiriboga Gavidia, W. G., Delgado Araujo, A. J., & Ruiz López, W. P. (2026). Analysis of volatile compounds generated in the analytical pyrolysis of tomato plant (Solanum Lycopersicum) waste from the AGRUPAR greenhouses. ECOCIENCIA Scientific Journal, 13(3), 1–20. https://doi.org/10.21855/ecociencia.133.1151
Section
Engineering
Author Biographies

Sergio Homero Medina Romo, Universidad Central del Ecuador

Chemical Engineer. Holds an MBA in Business Management, a Master’s Degree in Industrial Engineering, an MBA in Renewable Energy, and a Ph.D. in Chemical Engineering. He is a full-time Associate Professor (Level 1) in the Faculty of Chemical Engineering at the Central University of Ecuador.

Washington Gonzalo Chiriboga Gavidia, Universidad Central del Ecuador

Chemical Engineer. Holds a Master’s Degree in Project Management, a Master’s Degree in Energy Systems, and a Ph.D. in Science. Professor and researcher in the Faculty of Chemical Engineering at the Central University of Ecuador.

Alejandro Javier Delgado Araujo, Universidad Central del Ecuador

Chemical Engineer. Holds a Master’s Degree in Industrial Design, Production, and Automation. He is a full-time Assistant Professor (Level 1) in the Faculty of Chemical Engineering at the Central University of Ecuador.

   

Washington Polibio Ruiz López, Universidad Central del Ecuador

Chemical Engineer. Holds a Master’s Degree in Integrated Management Systems. He is a full-time Assistant Professor (Level 2) in the Faculty of Chemical Engineering at the Central University of Ecuador.

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