A microscale electrically heated rotary kiln for slow pyrolysis of biomass and waste was designed and built at the University of Perugia. The reactor is connected to a wet scrubbing section, for tar removal, and to a monitored combustion chamber to evaluate the lower heating value of the syngas. The system allows the evaluation of gas, tar, and char yields for different pyrolysis temperatures and residence times. The feeding screw conveyor and the kiln are rigidly connected; therefore, a modification of the flow rate implies a modification of the inside solid motion and of residence time. The paper provides the theoretical and experimental calculation of the relationships between residence time and flow rate used to determine the working envelope of the reactor as a function of the feedstock bulk density and moisture content, given the actual heat rate of the electric heaters. The methodology is extendable to any rotary kiln reactor with a rigidly connected feeding screw conveyor, given its geometric and energetic specifications. Part II of the paper will extend the energy balance, also introducing the yields of pyrolysis products.
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e-mail: fanto@unipg.it
e-mail: simone_colantoni@unipg.it
e-mail: bartocci@crbnet.it
e-mail: umberto.desideri@unipg.it
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October 2007
Technical Papers
Rotary Kiln Slow Pyrolysis for Syngas and Char Production From Biomass and Waste—Part I: Working Envelope of the Reactor
Francesco Fantozzi,
Francesco Fantozzi
Department of Industrial Engineering,
e-mail: fanto@unipg.it
University of Perugia
, Via G. Duranti 67, 06125 Perugia, Italy
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Simone Colantoni,
Simone Colantoni
Department of Industrial Engineering,
e-mail: simone_colantoni@unipg.it
University of Perugia
, Via G. Duranti 67, 06125 Perugia, Italy
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Pietro Bartocci,
Pietro Bartocci
Biomass Research Center,
e-mail: bartocci@crbnet.it
University of Perugia
, Via M. Iorio 8, 06125 Perugia, Italy
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Umberto Desideri
Umberto Desideri
Department of Industrial Engineering,
e-mail: umberto.desideri@unipg.it
University of Perugia
, Via G. Duranti 67, 06125 Perugia, Italy
Search for other works by this author on:
Francesco Fantozzi
Department of Industrial Engineering,
University of Perugia
, Via G. Duranti 67, 06125 Perugia, Italye-mail: fanto@unipg.it
Simone Colantoni
Department of Industrial Engineering,
University of Perugia
, Via G. Duranti 67, 06125 Perugia, Italye-mail: simone_colantoni@unipg.it
Pietro Bartocci
Biomass Research Center,
University of Perugia
, Via M. Iorio 8, 06125 Perugia, Italye-mail: bartocci@crbnet.it
Umberto Desideri
Department of Industrial Engineering,
University of Perugia
, Via G. Duranti 67, 06125 Perugia, Italye-mail: umberto.desideri@unipg.it
J. Eng. Gas Turbines Power. Oct 2007, 129(4): 901-907 (7 pages)
Published Online: January 4, 2007
Article history
Received:
July 11, 2006
Revised:
January 4, 2007
Connected Content
A companion article has been published:
Rotary Kiln Slow Pyrolysis for Syngas and Char Production From Biomass and Waste — Part II: Introducing Product Yields in the Energy Balance
Citation
Fantozzi, F., Colantoni, S., Bartocci, P., and Desideri, U. (January 4, 2007). "Rotary Kiln Slow Pyrolysis for Syngas and Char Production From Biomass and Waste—Part I: Working Envelope of the Reactor." ASME. J. Eng. Gas Turbines Power. October 2007; 129(4): 901–907. https://doi.org/10.1115/1.2720521
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