2. THERMOCHEMICAL CONVERSION PROCESS FOR BIOMASS AND WASTE
Biogreen® is an innovative and patented process for thermochemical
conversion of biomass, plastic and waste. It includes a pyrolysis system
that extracts useful substances to be used for energy and other purposes.
Wood, straw, cereals waste, plastic, and sewage sludge all can be
converted into fuel, bio-char or coke and gas.
Biogreen significantly reduces the volume of waste while extracting the
product’s best benefits by producing food flavor, renewable electricity,
green chemical ingredients, soil amendment, and etc.
Biogreen® is a trademark and process developed by ETIA, an engineering
company founded in 1989 and specializing in processes of thermal treatment for bulk products.
www.biogreen-energy.com
CONDENSATION
chiller
BIOMASS
SEWAGE SLUDGE
GAS
PYROLYSIS*
BIO OIL
PLASTIC
MUNICIPAL
WASTE
COOLING
* Spirajoule® technology - www.spirajoule.com
BIOCHAR or COKE
3. THERMOCHEMICAL TRANSFORMATION
The thermochemical transformation
changes the product’s structure by applying
heat in a controlled atmosphere. Depending
on
the
operating
parameters,
the
thermochemical treatment of the ligneous
cellulosic biomass will produce bio-char, bio-oil,
chemical ingredients, soil fertilizer, and etc. With
Biogreen®, ETIA offers a multipurpose and efficient
range of solutions designed for the energy and
agrochemical conversion of the biomass.
TORREFACTION
Biogreen can be used for biomass torrefaction, among
other treatments. Torrefaction is one of the ways to
create
densification of the energy contained within a product.
Treatment is achieved within a few minutes at 200°C to
300°C in an anaerobic environment. Biomass will lose
weight (around 30%), and become crumbly. This prepares it
to be crushed or gasified. Torrefaction also produces a more
homogeneous product, with a low hygroscopicity that is
easy to store.
PYROLYSIS
The pyrolysis process will quickly heat biomass in the
absences of oxygen at a high temperature, between 400 and
800°C or more. The product transformation produces three
distinct outputs: bio-char or coke (solid fraction), bio-oil or
crude oil (liquid fraction), and gas. Various applications are
possible for these products: bio-char can be burned or used
for soil amendment. Bio-oil can be used as fuel or used in
the chemical industry as a renewable ingredient. It can also
be used in the food industry as a liquid smoke flavor. Crude
oil can be distilled to produce Diesel or Naphtha. The gas
fraction is generally used as heating power for the
process. Due to the unique design, the operating parameters of Biogreen® are precisely controlled. This allows
the operator to adjust the proportion of all the three
phases.
GASIFICATION
Biogreen® can also be used for the gasification
of torrefied products at a high temperature
(800°C). The gas fraction which is preponderant can be cracked at 1200°C in a
secondary stage and convert all
molecules into CO and H2.
