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Content archived on 2024-05-14

Clean biomass staged gasifier based on a new tar cracking and ash slagging technics for efficient combine heat and power generation

Objective



OBJECTIVES OF THE PROJECT:
Project industrial objective is to development of a new process characterised by the minimisation of the gas cleaning part. Details in the industrial objectives are:
1. a more higher tolerance towards quality of the feedstock (ash 15% and above, moisture up to 30% and above depending on gas cleaning),
2. a reduction of carbon content in the ash (98 to 99 % carbon recovery),
3. a reduction of the tar in the end gases to follow standards for engine uses,
4. a more robust and efficient gasification set up.
TECHNICAL APPROACH:
The approach will consist in:
1. Introducing a new device named Total Char Combustion and Tar Cracking Chamber
(TCC)2 between the pyrolysis unit and the char reduction chamber in a stage divided gasified
With this design, the char conversion takes place in 2 steps. The first step is the char reduction
Chamber (CRC) whose main purpose is to convert as much as possible carbon of the char
supplied directly from the pyrolysis unit into gas by means of reduction reactions. The second
step takes place in the (TCC)2 whose purpose, with respect to the char is to perform a
complete conversion of the remaining carbon from the CRC drain off and where pyrolysis
gases are thermally cracked and residual ashes are vitrified and eliminated as slag.
2. Designing and implementing a new vibrated fluidization pyrolysis unit able to achieve an
appropriate and constant quality of char with minimum preparation of biofuel with a good
phase separation.
3. Offering the opportunity to orientate the process for gas and solid reactions by simple
operating conditions as a function of the plant requirement and market condition
EXPECTED ACHIEVEMENT:
For all industrial partners, the achievements of the objectives should result in the following
benefits:
1. the present costly tar cleaning set up will not be necessary
2. the efficiency of the process will increase because carbon content of ashes will approach
zero
3. the total gasification process will become environmentally cleaner
4. the elimination of operational problems arising with low melting point of biomass ashes
thanks to the vitification process.

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Coordinator

CENTRE DE COOPERATION INTERNATIONALE EN RECHERCHE AGRONOMIQUE POUR LE DEVELOPPEMENT - CIRAD
EU contribution
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Address
Avenue de la Belle Gabrielle 45 BIS
34032 MONTPELLIER
France

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Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

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Participants (7)

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