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Incheon, South Korea

Seo J.-W.,Konkuk University | Lee E.-S.,Sunchang Corporation | Kang C.-Y.,Korea Forestry Promotion InstituteSeoul | Kim S.-B.,Korea forest Research Institute | And 2 more authors.
Journal of the Korean Wood Science and Technology

The quality characteristics of the woodpellet manufactured from two domestic pines (Pinus densiflora S. et Z. and Pinus rigida Mill.) were investigated for the efficient energy use of woody biomass resources. Properties of woodpellets such as moisture content, heating value, ash content, apparent density and durability were determined by using the standard test method of woodpellets of Korea Forest Research Institute (KFRI) and elemental analysis. The results of elemental analysis for C, H, O and N showed 61.42% carbon, 5.56% hydrogen, 32.87% oxygen, and 0.15% nitrogen for Pinus densiflora S. et Z. and 61.03% carbon, 5.96% hydrogen, 32.83% oxygen, and 0.18% nitrogen for Pinus rigida Mill. No significant difference between Pinus densiflora S. et Z. and Pinus rigida Mill was observed on elemental analysis. Heating values of each woodpellet were ranged from 19.00 to 19.42 MJ/kg which satisfied the first grade quality standard (≥ 18.0 MJ/kg) by KFRI. The ash contents of woodpellet were slightly different between Pinus densiflora S. et Z. and Pinus rigida Mill., and satisfied the first grade quality standard (≤ 0.7%) by KFRI. Apparent density of woodpellet (Pinus densiflora S. et Z.) was passed the first grade standard level (≥ 640 kg/m3), and woodpellets from Pinus rigida Mill. satisfied the second grade quality of the standard. The moisture contents of each woodpellet were satisfied by the first grade quality standard (≤ 10%). The durability of woodpellet (Pinus densiflora S. et Z.) was passed the third grade level (≥ 95%), but Pinus rigida Mill. woodpellet was insufficient to satisfy the quality standard. Source

Park B.-D.,Kyungpook National University | Kang E.-C.,Sunchang Corporation | Park S.-B.,Korea forest Research Institute | Park J.Y.,Korea forest Research Institute
European Journal of Wood and Wood Products

Since different test methods of measuring the formaldehyde emission (FE) from wood-based composite panels have been used for different countries and regions, this study attempted to establish empirical correlations between three test methods (i.e., 24-hour desiccator, 1 m 3 chamber, and perforator) for plywood (PLW), particleboard (PB), and medium density fiberboard (MDF), particularly emphasizing on correlations between the 24-hour desiccator and the 1 m 3 chamber method. The desiccator method found statistically high correlations with other two methods, resulting in regression coefficient values ranging from 0.96 to 0.88 for PLW, PB, and MDF samples. In particular, the desiccator method had an empirically high correlation with the 1 m 3 chamber method that had been adopted as the reference method of comparing regionally different test methods of measuring the FE of wood-based composite panels by the ISO/TC89. © 2010 Springer-Verlag. Source

Lee S.-M.,Korea forest Research Institute | Park J.-Y.,Seoul Development Institute | Park S.-B.,Korea forest Research Institute | Han S.-T.,Sunchang Corporation | Kang E.-C.,Sunchang Corporation
Forest Products Journal

Amino resin wood adhesives used for medium-density fiberboard (MDF), a melamine-urea-formaldehyde (MUF) resin and a urea-formaldehyde (UF) resin, were each synthesized with an overall formaldehyde/urea molar ratio of 1.10. The storage stability of the resins was monitored by their gel times and viscosity changes, as well as by a multiple light scattering method. The storage stability tended to be affected by the temperature at which the resins were stored. MUF resin had a higher storage stability at a storage temperature above room temperature, whereas UF resin exhibited the best storage stability at 10°C with overall good stability at all tested temperatures from 10°C to 40°C. © Forest Products Society 2012. Source

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