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Contenido archivado el 2024-05-07

A novel approach for the integration of biomass pyrolytic conversion processes in existing markets of liquid fuels and chemicals

Objetivo



Objectives

The proposed integrated approach has the following objectives: - Pyrolysis of various feedstocks, e.g. straw, arundo donax, hardwood (eucalyptus species) and softwood (pine species).
- Evaluation of characteristics of qualified feedstocks
(ultimate and proximate analysis and calorific value).
- Optimization of flash pyrolysis and combustion processes to increase liquid yields and improve liquids quality.
- Close-coupling of existing biomass conversion (CFB
reactor), post treatment (product stream dedusting and
pyrolysis vapour quenching) and upgrading (plasma reactor)
processes
- Derivation of scale-up rules for flash pyrolysis plants.
- Setting-up of requirements for risk analysis of integrated advanced pyrolysis systems including detailed study on
technoeconomics for either heat or power applications.
- Proposals for the removal of barriers to introduce
pyrolysis liquids to niche markets, e.g. refinery
infrastructure.

Technical Approach

In the framework of previous R&D programmes, a novel reactor configuration, suitable for the maximisation of the liquid
products derived from biomass flash pyrolysis has been
constructed and tested. It is a Circulating Fluidised Bed
(CFB) reactor, which is fuelled by partial combustion of the byproducts of the pyrolytic process. This is achieved by
recirculation of the byproduct char to the lower portion of
the CFB reactor, where it is combusted, providing the energy requirements to carry out the biomass devolatilization
process. Results have shown total liquid yields of 55-60% wt, based on maf feedstock. However essential process
modifications (e.g. hot gas filtration and liquid recovery
based on direct quench of pyrolysis vapours)are required to
improve quality and further increase liquid yields. Moreover, the liquid products have to be analyzed and upgrading
techniques (such as hydrotreatment of zeolite cracking)
thorougly investigated prior to applying the process at a
larger scale. A scaleup procedure (for plants up to 1 tonne
maf biomass/h) should furthermore be based on robust results derived by large-scale hydrodynamics study. Finally, market
applications of the overall process require a detailed risk
analysis as well as an assessment of the necessary procedures to accelerate pyrolysis products penetration in the existing infrastructure of liquid fuels and chemicals.

Expected Achievements and Exploitation

The output of the project include:
- a breakthrough in pyrolysis liquid upgrading technology
- derivation of scale-up rules to minimize risks associated to changing fluid dynamics in larger systems.
- development of an integrated scheme for biomass conversion - technoeconomic assessment of the concept
- exploitation of low-value resources (forestal and
agricultural residues) by converting them to an easily
handled, higher energy density product
- exploration of the possibilities for further utilisation of pyrolysis products in niche markets

Ámbito científico (EuroSciVoc)

CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural. Véas: El vocabulario científico europeo..

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Coordinador

AGRICULTURAL UNIVERSITY OF ATHENS
Aportación de la UE
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Dirección
75,Iera Odos 75
11855 ATHENS
Grecia

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Participantes (5)

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