The role of lignin in the densification of torrefied wood in relation to the final product properties

Nanou, P.; Huijgen, W.J.J.; Carbo, M.C.; Kiel, J.H.A.

doi:10.1016/j.biombioe.2017.05.005

Cited by 31 publications

(11 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Poplars in general are increasingly used for biofuel production due to its high growth and biomass productivity, significant amount of hollocellulose (cellulose 42 to 49% and hemicelluloses from 16 to 23 %) and not too high lignin content (between 21 and 29%) (e.g., [13]). The higher aptitude for torrefaction observed in the set of biomasses including poplar SRC and common broom should be due to chemical structural characteristics pointed in the Introduction such as predominance of xylan type hemicelluloses or of β-O-4 bonds and syringyl content in lignin more susceptible to cleavage [14]. Thereby, the total degradation of hemicelluloses and partial degradation of lignin initiated by demethoxylation and β-O-4 bond cleavage leads to a solid residual char enrichment in higher chemical rich and heating energy components of cellulose and lignin [15].…”

Section: Discussionmentioning

confidence: 95%

Torrefaction of Portuguese woody biomasses and the evaluation of its properties

Nunes¹,

Godina²,

Matias³

et al. 2024

RE&PQJ

View full text Add to dashboard Cite

Torrefaction is an option for improving biomass properties for fuel application. Biomass undergoes chemical changes reflected on the upgrading of its properties as a biofuel, such as higher calorific power, lower O/C and H/C ratios, lower higroscopicity or better grindability. The objectives of this experimental study were to analyze the effects of torrefaction, under standard conditions of 265 ºC, and residence time of 15 minutes in a nitrogen atmosphere and during a total 1h45m heating period, on a set of sixteen woody biomasses coming from poplar short rotation coppice (SRC) and other Portuguese roundwoods. Average mass loss was higher than 40%. The set of poplar clones and common broom provided torrefied products with higher quality than the set of roundwood forest species. The results on other parameters for proximate and ultimate analysis corroborate this global picture. Correlation analysis showed a higher degree of interconnectedness between LHV and proximate analysis results, for poplar clones and common broom, comparatively with roundwood biomasses.

show abstract

Section: Discussionmentioning

confidence: 95%

Torrefaction of Portuguese woody biomasses and the evaluation of its properties

Nunes¹,

Godina²,

Matias³

et al. 2024

RE&PQJ

View full text Add to dashboard Cite

show abstract

“…The third section is the inclusion of process additives. Lignin acts as a natural binder in the densification process (Nanou et al 2018). The inclusion of extra additives to the process, such as cassava stem powder, plastics, oil, etc., could potentially increase the mechanical strength of the products and reduce energy consumption (Larsson et al 2015;Emadi et al 2017;Wang et al 2019a).…”

Section: Introductionmentioning

confidence: 99%

Research on the mechanical behavior of the biomass densification process based on a thick-walled cylinder

Wang

Sun

2020

BioRes

View full text Add to dashboard Cite

The mechanical behavior of the biomass densification process has noticeable influences on energy consumption and pellet quality. In the authors’ previous work, a method was proposed to determine the inner pressure by testing the circumferential strain of the outer die wall. Based on this method, a device was developed with strain gauges in the form of a single pellet unit. With this device, experiments were conducted with wood shavings, rice straw, and wheat straw under different levels of particle size, compression rate, and moisture content. The effects of these factors on the inner pressure were analyzed. The relationships among the inner pressure, pellet density, and specific energy consumption were obtained. Results showed that the pressure ratio increased linearly and then decreased and became constant during the relaxation period. The pressure change during the relaxation period was isotropic. The results could provide mechanical explanations for the phenomena in biomass densification processes.

show abstract

“…Recently, the issue of densification of thermally treated biomass has been the subject of research by many authors [11,20,21,26,27,[32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Utilization of waste forest biomass: pelletization studies of torrefied sawmill wood chips

et al. 2019

View full text Add to dashboard Cite

The paper presents the effects pelletization process of torrefied waste forest biomass -sawmill wastes. The sawmill waste are generated in significant quantities and has significant energy potential. The use of torrefaction and pelletization process enables to produce mechanically durable fuel pellets. Aim of the studies was to evaluate the effect of different kind of additives (binders) to torrefied waste forest biomass on pelletization process characteristic (production capacity, energy consumption) and properties of produced pellets (i.e. density, mechanical durability). The most effective binder among the tested was modified wheat starch. Pellets made with this addition were characterized by the highest mechanical strength.

show abstract

The role of lignin in the densification of torrefied wood in relation to the final product properties

Cited by 31 publications

References 31 publications

Torrefaction of Portuguese woody biomasses and the evaluation of its properties

Torrefaction of Portuguese woody biomasses and the evaluation of its properties

Research on the mechanical behavior of the biomass densification process based on a thick-walled cylinder

Utilization of waste forest biomass: pelletization studies of torrefied sawmill wood chips

Contact Info

Product

Resources

About