Category Archives: Thermal biomass. conversion and utilization —. Biomass information. system

Vapour residence time

The effect of vapour residence time on organic liquid yield is relatively well understood although the interaction of temperature and residence time is less understood. Studies by Diebold et al., Liden et al and Knight et al. have attempted to interlink both primary liquids formation and secondary cracking, but one essential component which is neglected is the variation of water […]

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The objective of the process was charcoal production from which a by-product oil was derived by condensation of the vapours in the offgases. A continuous, 50 kg/h demonstration plant process was available in Switzerland and several commercial plants have been sold up to 2 t/h capacity. The oil from one of these units in Spain was successfully utilised in a […]

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A detailed review of the science and technology of fast pyrolysis and related processes has been carried out covering the basic scientific principles of fast pyrolysis for producing liquids; their application to working processes with identification of the main problems; a description of the more commercially and technically advanced of these processes; and opportunities for chemicals recovery and upgrading of […]

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3.6.1 General properties The crude pyrolysis liquid is dark brown and with low viscosity which approximates to biomass in elemental composition, and is composed of a very complex mixture of oxygenated hydrocarbons with an appreciable proportion of water from both the original moisture and reaction product. Solid char (39, 40, 41124, 125, 126) and dissolved alkali metals from ash (124) […]

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North America

Fast pyrolysis of biomass was “invented” in North America around 1979 with early work being performed by NREL and the University of Waterloo. A number of commercial and demonstration plants for flash pyrolysis are operating in North America at a scale of up to 1000 kg/h. Ensyn (Canada) are marketing commercial flash pyrolysis plants of up to 4 t/h throughput […]

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Liquids colfection

This has long been a major difficulty for researchers. The pyrolysis vapours have similar properties to cigarette smoke and capture by almost all collection devices is very inefficient. The product vapours are not true vapours but rather a mist or fume and are typically present in an inert gas at relatively low concentrations which increases cooling and condensation problems. They […]

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