Physicochemical and thermal characteristics of sugarcane straw and its cellulignin
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Combustion of biomass is considered to be a source of atmospheric pollution and, therefore, is one of the important sources of CO2 emission. This paper discusses the burning of sugarcane straw and its cellulignin in laboratory tests to determine the characteristics and emission factors, of this combustion process. Elemental, chemical composition and thermogravimetric analyses were performed for both samples. Carbon contents for sugarcane straw and its cellulignin were estimated, and the values found were 45.69% and 44.28%, respectively. Higher heating values (HHV) were determined by experimental methods with a calorimetric bomb and were estimated by theoretical equations. The best results were obtained when only the lignin’s content was considered. During the experimental tests to determine HHVs, cellulignin did not burn completely, while straw burned completely. This could be because cellulignin contains more ashes, resulting in more residual ash after burning. Pollutant emission of CO2, CO, NO and UHC was evaluated in the flaming and smoldering combustion phases. NO concentrations were not presented because they were less than 10 ppm. The average theoretical and experimental emission factors for CO2 were analyzed. CO2 emissions factors found for sugarcane straw and their cellulignin were 1316 ± 83.6 and 1275 ± 105 g kg−1 of dry burned biomass, respectively. The evaluated parameters are useful to incorporate these materials into a future biorefinery.
KeywordsBiomass Emissions factor Thermochemical conversion Biorefinery Energy
The authors acknowledge the financial support by FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo), Brazil, through processes 2013/27142-0 and 2013/04441-1.
- 6.CONAB—Companhia Nacional de Abastecimento. Acompanhamento da safra brasileira: Cana-de-açúcar. v.4—Safra 2017/2018, N.1. Primeiro Levantamento. Brasilia. 1–57, abril 2017. ISSN: 2318-7921Google Scholar
- 10.Ronquim CC (2010) Queimada na colheita de cana-de-açúcar: impactos ambientais, sociais e econômicos. Campinas: Embrapa Monitoramento por Satélite. Documentos 77. ISSN 0103-78110Google Scholar
- 11.CEMIG—Companhia Energética de Minas Gerais (2012) Alternativas Energéticas: uma visão CEMIG. CEMIG, Belo HorizonteGoogle Scholar
- 12.ANEEL—Agência Nacional de Energia Elétrica (2008) Atlas de energia elétrica do Brasil/Agência Nacional de Energia Elétrica. 3a. ed., Brasília: ANEEL. ISBN: 978-85-87491-10-7Google Scholar
- 18.Hernández-Pérez AF, Costa IAL, Silva DDV, Dussán KJ, Villela TR, Canettieri EV, Carvalho JA Jr, Soares Neto TG, Felipe MGA (2016) Biochemical conversion of sugarcane straw hemicellulosic hydrolysate supplemented with co-substrates for xylitol production. Biores Technol 200:1085–1088CrossRefGoogle Scholar
- 19.Oliveira FMV, Pinheiro IO, Souto-Maior AM, Martin C, Gonçalves AR, Rocha GJM (2013) Industrial-scale steam explosion pretreatment of sugarcane straw for enzymatic hydrolysis of cellulose for production of second generation ethanol and value-added products. Biores Technol 130:168–173CrossRefGoogle Scholar
- 43.Hon DNS, Shiraishi N (2001) Wood and cellulosic chemistry, 2nd Edn, Revised and expanded. Marcel Dekker, New York and Basel 914. ISBN 0-8247-0024-4Google Scholar
- 49.Lopes MLA, Carvalho LRF (2009) Estimativas de emissão de gases provenientes da queima de cana-de-açúcar em escala regional. In: Proceedings of the 32a Reunião Anual da Sociedade Brasileira de Química (SBQ), Fortaleza, CE, Brazil, 30 May–2 June 2009Google Scholar