Author: Miglena Valyova

Articles

PYROLYSIS OF WASTE WOOD

Authors: Miglena Valyova, Yordanka Ivanova

Summary

The fast and slow pyrolysis is a both flexible and an attractive method for converting biomass into easy to store and transport products that are used both as an energy source and a feedstock for chemical production. Considerable efforts have been made to convert wood biomass to liquid fuels, energy and chemicals since the oil crisis in the middle of 1970. The aim of the current review is to summarize investigations before 2010 year for understanding of process of pyrolysis. In this review are discussed publications for pyrolysis of waste wood from beech, oak, poplar, pine and other species from 2010 to 2014 years.

Keywords: waste wood, pyrolysis

EN Version

INVESTIGATION OF SOME PROPERTIES OF WOOD-POLYMER MATERIAL BASED ON MODIFIED UREA-FORMALDEHYDE RESIN

Authors: Miglena Valyova, Yordanka Ivanova, Ivan Genov

Summary

Wood processing is related to the release of large amounts of waste, such as wood dust, sawdust and others. In order to their utilization perspective direction is the wood-polymer materials production, which can be applied in many industries.

In the present study some physical and mechanical properties of wood-polymer material based on modified urea-formaldehyde resin with chlorine-containing polymers were investigated. The obtained results showed that the increase of chlorinated paraffin content leads to an improvement in all investigated physical and mechanical properties.

Keywords: wood-polymer material, urea-formaldehyde resin, chlorine-containing polymers

EN Version