Description: Das Projekt "A novel approach for the integration of biomass pyrolytic conversion processes in existing markets of liquid fuels and chemicals" wird vom Umweltbundesamt gefördert und von Universität Stuttgart, Institut für Physikalische Elektronik durchgeführt. General Information/Objectives: The proposed integrated approach has the following objectives: - Pyrolysis of various feedstocks, e.g. straw, around 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 techno economics 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 and 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 by-products of the pyrolytic process. This is achieved by recirculation of the by-product 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 per cent 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) thoroughly investigated prior to applying the process at a larger scale. A scale up 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 - techno economic assessment of the concept - ... Prime Contractor: Agricultural University of Athens, Department of Land Reclamation and Agricultural Engineering, Laboratory of Farm Structures; Athens; Greece.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Stuttgart ? Flüssigtreibstoff ? Flüssigbrennstoff ? Eukalyptus ? Kiefer ? Zeolith ? Hydrodynamik ? Athen ? Blitz ? Brüden ? Elektronik ? Strömungstechnik ? Laubholz ? Weichholz ? Mitverbrennung ? Griechenland ? Altanlage ? Alternative Energie ? Entstaubung ? Gasfiltration ? Landwirtschaftlicher Betrieb ? Marketing ? Landgewinnung ? Pyrolyse ? Raffinerie ? Stroh ? Verbrennung ? Verfahrenskombination ? Verfahrensoptimierung ? Wirtschaftlichkeitsuntersuchung ? Holz ? Altholz ? Nebenprodukt ? Studie ? Chemikalien ? Verfahrenstechnik ? Energie ? Wirbelschichtfeuerung ? Energiebedarf ? Energiegewinnung ? Energietechnik ? Brennwert ? Erneuerbare Ressource ? Reaktor ? Risikoanalyse ? Rohstoff ? Alternativtechnologie ? Feuerung ? Biomasse ? Agrartechnik ? Risiko ? Verfahrensintegration ?
Region: Baden-Württemberg
Bounding box: 9° .. 9° x 48.5° .. 48.5°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1996-10-01 - 1998-09-30
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