Torrefaction pretreatment is of great significance to the enhancements of biomass characteristics. Product distribution and kinetics analysis of spruce-pin-fir (SPF) sawdust and its torrefaction samples were studied during the fast pyrolysis process. Under anaerobic conditions, torrefied biomass...

The paper assesses the influence of the heat flux on spruce wood (Picea abies L.) behavior. The heat flux was performed at 15, 20, 25, and 30 kW.m^-2. The fire-technical properties, such as the mass burning rate, charring thickness, charring rate, as well as the chemical composition (contents of the ...

The biomass chemical looping gasification (BCLG) of torrefied spruce-pine-fir (SPF) sawdust with Fe₂O₃ was studied using thermogravimetry-mass spectrometry (TG-MS). The effects of torrefaction temperature and OC ratio on the BCLG were investigated. The thermal characteristics of torrefied SPF with...

Most of the defects affecting heat-treated wood quality are often attributed to heterogeneous heat transfers in industrial kilns. Even if interspecific variability of wood has been reported to affect thermal degradation of the material, little has been reported on the effects of intraspecific...

Ancient architectural wood components were evaluated in terms of mechanical properties, material color expression, ultrasonic shape, chemical components, and deformation of shape and position by comparing them with new red pine materials. The results showed that the deterioration of the surface...

In this research, Fir wood (Abies spp.) was thermally modified by retification process. The effect of modification process on physical and mechanical properties of fir wood were evaluated. For this aim, fir wood specimens with 12% moisture were modified in the steel tank with nitrogen gas medium at ...

Eighteen tested beams(2 850 mm×150 mm×50 mm) were made from spruce-pine-fir(SPF) and bamboo scrimber, which were divided into three tested groups containing 6 tested beams, respectively, based on the different replacement rations(0, 1/6, and 2/6). The loading test was carried out according to...

Among the renewable sources, residual woody biomass from agricultural crops is becoming of great interest due to its lower environmental impact and one of the most growing agricultural sector, of the last decade, is the hemp industry which generates several kind of byproducts. In this paper, a...

The paper proposes the use of microwave irradiation to lower the initial moisture content of wood chips. The study involved willow and fir chips fractionated by means of a sieve separator and unfractionated ash chips. The wood chips were exposed to a constant microwave power of 800 W for 30 s, 60...

This article shows the performance of spruce bridge that represents the situation of several wooden bridges built in the 1990s in Spain with spruce and fir. In most cases, damages due to severe decay had appeared before 10 years of service life, and the magnitude and extent of the damages were so...