This process is first of its kind which is developed in Denmark by 2 Danish universities Aalborg University and Aarhus University according to this process HTL all the crude bio-oil produced is sufficiently similar to the fossil crude oil. The HTL process only consumes approximately 10-15 percent of the energy in the feedstock biomass, yielding an energy efficiency of 85-90 percent.
To emphasize, the HTL process accepts all biomasses from modern society – sewage sludge, manure, wood, compost and plant material along with waste from households, meat factories, dairy production and similar industries. It is by far the most feedstock flexible of any liquid fuel ...view middle of the document...
g. the carbohydrate content.
The water phase emanating from the HTL process has low carbon contents and can either be recycled into the process or ultimately be purified to attain drinking water quality, which is the long-term goal. As such HTL replaces the burden of disposal with the benefit of recycling.
The HTL process has the following benefits:
Crude HTL oil has high heating values of approximately 35-39 MJ/kg on a dry ash free basis
The HTL process only consumes approximately 10-15% of the energy in the feedstock biomass, yielding an energy efficiency of 85-90%
Crude HTL oil has very low oxygen, sulphur and water content (compared to e.g. pyrolysis oil which typically contains approx. 50% water)
HTL oil recovers more than 70% of the feedstock carbon content (single pass)
HTL oil is storage stable, and has comparatively low upgrading requirements, due in part to a high fraction of middle distillates in the crude oil. It is much less upgrading intensive than e.g. pyrolysis oil, which needs immediate upgrading in order not to deteriorate.
The bio-oil from HTL can be used as-produced in heavy engines or it can be hydrogenated or thermally upgraded to obtain diesel-,...