Abstract
Wood hydrolysis facilities were built in both northern and southern European regions of Russia, as well as in Siberia and the Russian Far East. Other hydrolysis plant in the former USSR were located in Ukraine, Belarus, Uzbekistan, Kazakhstan, Moldova and Lithuania. All or most of these facilities produced substantial amounts of excess lignin, so called “hydrolysis lignin” (HL). Technology of energy utilization of HL, having a great potential is a production of granulated fuel. Perspective way is pelletization of HL. In this paper complex kinetic analysis of hydrolysis lignin and its organic components under conditions of dynamic and isothermal heating was carried out. Kinetic parameters are determined using the extended independent parallel model.
Highlights
More attention is being paid to wood biofuels, which are renewable energy sources and take the fourth position in the world energy balance after coal, natural gas and oil that are connected with some factors
Acid hydrolysis of wood and agricultural residues for the production of ethanol, fodder yeast, hexose and pentose sugars and their derivatives had industrial applications in Soviet Union and Bulgaria [4]. It was based mainly on percolation hydrolysis using diluted H2SO4, which was developed in the former USSR and used from the 1930s to the 1990s, some semi-industrial facilities for wood or agricultural residue hydrolysis using concentrated HCl were used during this period
Other hydrolysis plant in the former USSR were located in Ukraine, Belarus, Uzbekistan, Kazakhstan, Moldova and Lithuania
Summary
More attention is being paid to wood biofuels, which are renewable energy sources and take the fourth position in the world energy balance after coal, natural gas and oil that are connected with some factors. Acid hydrolysis of wood and agricultural residues for the production of ethanol, fodder yeast, hexose and pentose sugars and their derivatives (i.e. furfural and xylitol) had industrial applications in Soviet Union and Bulgaria [4]. Combination of the preliminary torrefaction process of HL before its pelletization (isothermal heating at 250– 300°С without oxygen) of the initial HL will lead to receiving a new product with better heating values: energy yield and density. First experience of such plant in the Arkhangelsk region of the Russian Federations shows that pellets from HL has calorific value not lower than 21,34 MJ/kg (with Wr=6,27%; Аr=2,45%). The results were compared with parameters of classic wood fuels
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