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


5.3.1 Introduction This work was instigated to assess fast pyrolysis as an alternative method for tyres disposal. The primary objective was to demonstrate that short residence times and high heating rates could produce high yields of liquids from rubber. A 10-25 kg/h unit was constructed to investigate the reactor parameters of surface temperature and gas/vapour product residence time and particle […]

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Particulate levels may be high from char and ash carry-over. Separation of solids and liquids is poorly understood with reliance placed on primary separation in the vapour phase downstream of the reactor before condensation. Efficient separation inevitably causes some condensation or precipitation and carefuf design is essential. Solid separation in the liquid phase is not believed to have been studied, […]

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5.16.1 Summary The objectives of the work are to develop and operate a novel ablative pyrolysis reactor for the production of liquids in high yields form wood feedstock under a range of operating parameters, primarily reactor temperature and residence time. The process concept has been successfully developed at 3 kg/h and oil yields of up to 80 % wt. on […]

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Direct production of chemicals

Direct production of speciality chemicals by concurrent catalytic processing with pyrolysis has also attracted some attention. There has been scattered research on the effects of adding various catalysts to biomass prior to pyrolysis. Addition of sodium chloride increased yields of char and of certain chemicals such as glycolaldehyde (hydroxyacetaldehyde), and suppressed levoglucosan production (41). Similar effects were found with zinc […]

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Char separation

Some char is inevitably carried over from cyclones and collects in the liquid. Subsequent separation has proved difficult. Some success has been achieved with hot gas filtration in a ceramic cloth bag house filter (11) and also candle filters for short run durations. Liquid filtration has also proved difficult as the liquid can have a gel-like consistency, apparently due to […]

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The objectives of the work were to produce pyrolysis vapours for catalytic treatment as a parallel study to the ablative pyrolysis work being performed at NREL using the same principle of contacting biomass with a heated surface under conditions of high relative motion and applied pressure. The work was fundamental in assessing the requirements for ablation and preliminary yield data […]

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