co-firing of biomass with coal.pdf

7/27/2019 Co-firing of Biomass with coal.pdf

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A. Maciejewska, H. Veringa, J. Sanders, S.D. Peteves

DG JRC

Institute for Energy

2006

CO-FIRING OF BIOMASS WITH COAL:

CONSTRAINTS AND ROLE

OF BIOMASS PRE-TREATMENT

EUR 22461 EN


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Mission of the Institute for EnergyThe Institute for Energy provides scientific and technical support for the conception, development, implementationand monitoring of community policies related to energy. Special emphasis is given to the security of energysupply and to sustainable and safe energy production.

European CommissionDirectorate-General Joint Research Centre (DG JRC)http://www.jrc.ec.europa.eu

Institute for Energy, Petten (the Netherlands)http://ie.jrc.ec.europa.eu

Contact details:Anna Maciejewskaphone: +31 224 56 54 82e-mail: [email protected]

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EUR 22461 ENISBN 92-79-02989-4ISSN 1018-5593Luxembourg: Office for Official Publications of the European Communities

European Communities, 2006Reproduction is authorised provided the source is acknowledged.

Printed in the Netherlands

Cover:Copyright photos: see References, nrs [68], [70 - 74]


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European Commission

EUR 22461 EN DG JRC Insti tute for EnergyCo-firing o f Biomass with Coal: Constrain ts and Role of Biomass Pre-Treatment

Authors:Anna MaciejewskaHubert VeringaJohan SandersStathis Peteves

Luxembourg: Office for Official Publications of the European Communities2006 100 pp. 21 x 29.7 cmEUR - Scientific and Technical Research Series; ISSN 1018-5593ISBN 92-79-02989-4

AbstractThere are many successful commercial co-firing installations, however various constraints can be encountered,especially in direct co-firing mode (which is the most common among co-firing systems), and with tendencyto increase biomass/coal ratio, and use low quality biomass. These constraints can include handling, storage,milling and feeding problems, deposit formation (slagging and fouling), agglomeration, corrosion, erosion, andash utilization issues. Most of the co-firing challenges originate from biomass propertiesThe problems associated with co-firing systems can be addressed by various measures. One of them isapplication of biomass pre-treatment, which is an interesting option, as by modifying biomass properties, it

addresses problems at their source.The aim of this work is to provide an overview of possible constraints that can be encountered in systems co-firing coal with biomass, and identify biomass pre-treatment options with potential to address them. This wasdone by investigation of the literature.The pre-treatment options discussed include sizing, drying, washing, pelletisation, torrefaction and pyrolysisof biomass, as well as combinations of some of them.The most advanced form of bio-feedstock currently used in co-firing on commercial scale is biomass pre-treated into pellets.An interesting option is pyrolysis of biomass into pyrolysis oil, however this option cannot be applied in directco-firing systems. It seems that biomass pre-treatment by combination of pelletisation with torrefaction mightbe an interesting option, as it could to even larger extent (than in case of conventional pellets) mitigate theproblems related to high transportation and storage costs, handling, and milling of raw biomass.The only single pre-treatment option with potential to mitigate problems (if encountered) with bed agglomeration,

deposit formation (slagging and fouling) and corrosion was identified to be biomass leaching (washing).It is not possible to define one universal pre-treatment option for biomass for co-firing purposes. It needs to bedecided on an individual basis, depending on various elements such as quality of raw biomass, type of co-firing system, desired co-firing ratio, and others.


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The mission of the Joint Research Centre is to provide customer-driven scientific and technical support for theconception, development, implementation and monitoring of EU policies. As a service of the EuropeanCommission, the JRC functions as a reference centre of science and technology for the Union. Close to thepolicy-making process, it serves the common interest of the Member States, while being independent ofspecial interests, whether private or national.

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co-firing of biomass with coal.pdf

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