The concentration of selected heavy metals in poplar wood biomass and liquid fraction obtained after high temperature pretreatment

Krutul, D.; Szadkowski, Jan; Antczak, A.; Drożdżek, Michał; Radomski, Andrzej; Karpiński, Stanisław

doi:10.37763/wr.1336-4561/66.1.3948

Cited by 5 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All the other elements were under the limits, similar to the results presented by Nunes et al [22], for which none of the studied species complied with the ENPlus ® standard limits. The potential variations verified in the content of both major elements, as in the content of minor elements, with the age of the specimens, have been studied by several authors, such as Krutul et al [28], who analyzed the concentration of some heavy metals in poplar wood, or Szadkowski and Balicka, who analyzed the adsorption of heavy metals by some woods from species, such as European aspen or black locust [29]. However, in none of the situations did the authors present the causes for the variations verified in the content of the different elements, even in the case of other species outside the genus Paulownia that could serve as a comparative analysis.…”

Section: Resultsmentioning

confidence: 99%

The Influence of Age on the Wood Properties of Paulownia tomentosa (Thunb.) Steud.

Esteves

Cruz‐Lopes

Viana

et al. 2022

Forests

View full text Add to dashboard Cite

Forests in Portugal are highly dependent on a short number of wood species, and new species with higher profitability are needed. The Paulownia species has generated great interest due to its fast-growing and relatively good wood properties. However, environmental factors have shown that Paulownia grows differently in each case. This study intends to determine the properties of young Paulownia trees from Portuguese plantations to determine the best age to cut the trees according to their use. The chemical composition (extractives in dichloromethane, ethanol and water, lignin, α-cellulose, and hemicelluloses), heating value, elemental analysis (CHNO), inorganic elements and thermogravimetric analyses (TGA), and the most important mechanical and physical properties (density, MOE, bending strength, water absorption equilibrium, moisture content, and dimensional changes) were determined for 1-, 3-, and 5-year-old trees. The results show that, chemically, the extractives increased while hemicelluloses decreased with age, and no trend was found for lignin and α-cellulose. The physical and mechanical properties increased with age, except for the MOE and bending strength. The 5-year-old samples presented the best features for pellet production, namely, calorific power, elemental composition CHNO and sulfur, and inorganic elements.

show abstract

Section: Resultsmentioning

confidence: 99%

The Influence of Age on the Wood Properties of Paulownia tomentosa (Thunb.) Steud.

Esteves

Cruz‐Lopes

Viana

et al. 2022

Forests

View full text Add to dashboard Cite

show abstract

“…The availability and typical composition of agricultural and silvicultural residues were also highlighted in Di Gruttola and Borello [1]. FR (softwood and hardwood) often remains in the forest after thinning or timber harvest, and it consists of weaker wood with thus higher shares of bark, which leads to increased ash concentrations [9] and elements (heavy metals) that might be critical for further processes [10]. DG, which can be composed of several different waste materials such as manure, crop residues or municipal waste, is the final product, or a by-product, of anaerobic digestion (AD) processes.…”

Section: Introductionmentioning

confidence: 97%

Hydrothermal Treatment of Residual Forest Wood (Softwood) and Digestate from Anaerobic Digestion—Influence of Temperature and Holding Time on the Characteristics of the Solid and Liquid Products

et al. 2022

View full text Add to dashboard Cite

Hydrothermal treatment (HTT) offers the potential to upgrade low-value biomass such as digestate (DG) or forest residue (FR) by producing solids and liquids for material use or energetic utilization. In this study, microwave-assisted HTT experiments with DG and FR as feedstocks were executed at different temperatures (130, 150, 170 °C) and with different holding times (30, 60, 90 min) to determine the influences on product properties (ash and elemental concentrations, calorific values and chemical compounds). In general, DG and FR reacted differently to HTT. For the DG solids, for instance, the ash concentration was reduced to 8.68%DM at 130 °C (initially 27.67%DM), and the higher heating value increased from 16.55 MJ/kgDM to 20.82 MJ/kgDM at 170 °C, while the FR solids were affected only marginally. Elements with importance for emissions in combustion were leached out in both HTT solids. The DG and FR liquids contained different chemical compounds, and the temperature or holding time affected their formation. Depending on the designated application of HTT, less severe conditions can deliver better results. It was demonstrated that different low-temperature HTT conditions already induce strong changes in the product qualities of DG and FR. Optimized interactions between process parameters (temperature, holding time and feedstock) might lead to better cost–benefit effects in HTT.

show abstract

Application of hydrothermal pretreatment during thermal conversion of hydrocarbon solid fuels

Xie

Chen

et al. 2022

Fuel Processing Technology

View full text Add to dashboard Cite

The concentration of selected heavy metals in poplar wood biomass and liquid fraction obtained after high temperature pretreatment

Cited by 5 publications

References 22 publications

The Influence of Age on the Wood Properties of Paulownia tomentosa (Thunb.) Steud.

The Influence of Age on the Wood Properties of Paulownia tomentosa (Thunb.) Steud.

Hydrothermal Treatment of Residual Forest Wood (Softwood) and Digestate from Anaerobic Digestion—Influence of Temperature and Holding Time on the Characteristics of the Solid and Liquid Products

Application of hydrothermal pretreatment during thermal conversion of hydrocarbon solid fuels

Contact Info

Product

Resources

About