Energy efficient liquefaction of biomaterials by thermolysis

Details Energy efficient liquefaction of biomaterials by thermolysis Energy efficient liquefaction of biomaterials by thermolysis

1996-05-20

1998-03-17

Wyse, Thomas G.

Distillation: processes, thermolytic

With comminuting

Prior to charging to carbonizing zone

201 25, 201 31, 201 36, C10B 4910

Patent

active

057282714

ABSTRACT:
A thermolysis process for liquefaction of biomass solids in which specific and previously unrecognized conditions are employed. The thermolysis is carried out in a single fluidized bed of inert material operating at near atmospheric pressure, relatively low temperature, long solids and gas residence times and moderate heating rates. The distribution of the thermolysis products among liquid (bio-oil), solid (char) and gases under these conditions is unique. In particular, contrary to the prior art, both high liquid and low char yields are obtained. Furthermore the liquid is of similar composition to those obtained by so called fast pyrolysis processes of the prior art. The specified conditions are such as to allow production of liquids in high yields in an energy efficient manner. The low severity of the conditions in comparison with previous approaches allows simplified process design and scaleup leading to lower capital and operating costs as well as easier control.

REFERENCES:
patent: 3853498 (1974-12-01), Bailie
patent: 3933434 (1976-01-01), Matovich
patent: 4153514 (1979-05-01), Garrett et al.
patent: 4510021 (1985-04-01), Sowards
patent: 5378323 (1995-01-01), Fransham et al.
patent: 5413227 (1995-05-01), Diebold et al.
patent: 5464876 (1995-11-01), Lyding et al.

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