Category Archives: Technologies for Converting Biomass to Useful Energy

Entrained flow gasifier

The entrained flow reactor (EFR) is well-known in coal combustion processes whilst the expe­rience with biomass is limited. In entrained flow gasifiers, no inert material is present but a finely ground feedstock is required. The fuel particles are fed co-currently with the oxidant agent and subsequently are the particles entrained with the gas stream. The EFR gasifiers operate at temperatures […]

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TGA STUDIES ON PYROLYSIS AND IGNITION

While the ultimate and proximate analyses provide information on the basic elements of fuel and quality of fuels (heat value, volatile matter, emission potential (based on N and S contents)), the temperature of the start and end pyrolysis, and rate of release of VM are provided by Thermo gravimetric Analyses (TGA). In addition, the modeling of pyrolysis, gasification, various energy […]

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An overview of thermal biomass conversion technologies

Erik Dahlquist The major thermal biomass conversion techniques are combustion, gasification, pyrolysis, and tor — refaction. Combustion means 100% oxidation of all organic contents of the fuel using air/oxygen, while gasification means partial combustion where some 15-30% of the oxygen is added in rela­tion to what would be needed for 100% oxidation. In pyrolysis we only heat but without adding […]

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Biomass gasification for gas supply

According to the agricultural biomass energy industry development planning for 2007 to 2015 of China’s Agriculture Ministry, 1000 straw gasification gas supply stations, with an annual capacity of 365 million cubic meters of gas from straw had been built by 2010, to solve the basic energy demands and changing the way China’s countryside is used; 2000 straw gasification gas supply […]

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Biomass properties of importance for gasification

The important properties of biomass of significance for gasification can roughly be divided as follows: • Physical and thermodynamic properties: The physical properties of biomass depend markedly on the type of feedstock. For instance, density may vary from 100kg/m3, for balsa, bagasse and straw, to 1200 kg/m3, for lignum vitae (Di Blasi, 1997). Permeability to gas flow and thermal conductivity […]

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