Effect of torrefaction temperature on properties of Patula pine

Abstract

The objective of this work was to study the effect of torrefaction temperature on properties of patula pine (Pinus patula) wood that could be of interest for further thermochemical processing. Torrefaction temperature was varied from 200 to 300 °C for 30 minutes using a batch spoon type reactor. Raw and torrefied materials were characterized for proximate and ultimate analyses, thermogravimetry, and pyrolysis gas chromatography/mass spectrometry (Py-GC/MS). Results showed that torrefied pine has greater higher heating value and chemical exergy due to the reduction of O/C and H/C ratios. Compared with raw biomass, the material torrefied at 200 and 250 °C did not present significant changes in chemical composition and thermal behavior. Conversely, material torrefied at 300 °C did show important changes in both chemical composition and thermal behavior. Py-GC/MS results suggested that the main constituents of biomass, i.e., hemicellulose, cellulose and lignin, suffer a progressive thermal degradation with increase in torrefaction temperature.

Effect of Torrefaction Temperature on Lignin Distribution of Larix kaempferiC. and Liriodendron tulipiferaL. Cubes and the Impact of Binder on Durability of Pellets Fabricated with the Torrefied Cubes

“…Particularly, LAR‐ and YP‐260T showed higher HHV than LAR‐ and YP‐180T or 220T ( P < 0.01). Similar results can be found in many studies dealing with torrefied wood or other biomass . Table also shows the weight loss of LAR and YP cubes torrefied at temperatures of 180, 220 and 260°C.…”

“…Through the treatment, moisture contained in a lignocellulosic biomass is removed as vapors with the devolatilization of low molecular weight compounds, resulting in solid biofuel with a high energy density. The energy density increases closer to that of coal used currently for heat and power generation . Torrefaction can also improve the hydrophobic property and decay resistance of a biomass .…”

Bio-coal production with agroforestry biomasses in Brazil

“…There is an important link between the extractives, cellulose, hemicelluloses and the volatile matter (Perei-ra et al 2013, Ramos-Carmona et al 2017. As the final temperature of pyrolysis rises, more degradation of these compounds is noted, thus resulting in a decrease in the concentration of the volatile matter.…”

“…A substantial environmental and socio-economic advantage can be achieved with the use of biomass as an energy supply (Carrión-Priet et al 2017). However, raw biomass reveals certain undesirable properties for energy purpose viz: heterogeneity, low energy density, high moisture and low grindability (Sermyagina et al 2015, Bach and Skreiberg 2016, Grassmann et al 2016, Ramos-Carmona et al 2017. To solve these issues, some treatments can be applied such as biochemical or thermochemical processes, which could improve the chemical and structural characteristics of the material.…”

Effect of Torrefied Wood Biomass under an Oxidizing Environment in a Downdraft Gasification Process

“…Torrefaction can be regarded as a mild pyrolysis process (200 to 300 °C) that is conducted under an inert environment for less than 1 h (Prins et al 2006;Couhert et al 2009;Ramos-Carmona et al 2017b). A torrefied biomass exhibits better properties than the raw material due to its lower moisture content and its lower O/C ratio caused by the thermal decomposition of hemicelluloses (Wei-Hsin Chen et al 2010;PelaezSamaniego et al 2014;Ramos-Carmona et al 2017).…”