Influence of Chemical Composition on Heating Value of Biomass: A Review and Bibliometric Analysis

Bruno Esteves (), Umut Sen and Helena Pereira
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Bruno Esteves: Department of Wood Engineering, Polytechnic Institute of Viseu, Av. Cor. José Maria Vale de Andrade, 3504-510 Viseu, Portugal
Umut Sen: Forest Research Centre (CEF), School of Agriculture, University of Lisbon Tapada da Ajuda, 1349-017 Lisbon, Portugal
Helena Pereira: Forest Research Centre (CEF), School of Agriculture, University of Lisbon Tapada da Ajuda, 1349-017 Lisbon, Portugal

Energies, 2023, vol. 16, issue 10, 1-17

Abstract: Biomass has become an increasingly important resource for energy generation. The influence of the chemical composition on the heating value of biomass has not been a thoroughly studied subject, as shown by a bibliometric analysis. It is well known that the heating value of lignin is significantly higher (23.26–25.58 MJ/kg) than that of polysaccharides (18.6 MJ/kg), while extractives often have HHVs over 30 MJ/kg, depending on their oxidation levels. Therefore, the proportions of the chemical components in biomass determine its HHV. Softwoods generally have higher HHVs than hardwoods due to their higher contents of lignin and lipophilic resin. Ashes are incombustible, and a high ash content leads to a lower HHV in biomass. Several models have been proposed to correlate the heating values and chemical compounds of biomass, but the most accurate models are based on the lignin from extracted samples, while good correlations between lignin and extractives have also been reported. No good correlations have been obtained with polysaccharide compounds.

Keywords: heating value; lignin; cellulose; extractive models (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (9)

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