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Calcination of limestone in a tubular reactor
Author(s) -
Kehat Ephraim,
Markin Alexander
Publication year - 1967
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450450110
Subject(s) - calcination , residence time (fluid dynamics) , flue gas , nusselt number , materials science , heat transfer , reactor design , nuclear engineering , thermodynamics , chemical engineering , waste management , chemistry , geology , engineering , physics , geotechnical engineering , catalysis , biochemistry , turbulence , reynolds number
Theoretical expressions were developed for the design of a tubular reactor for the calcination of limestone, pneumatically conveyed by flue gas. The total residence time and the length of the reactor are affected in particular by the particle size, the excess thermal capacity of the gas and the heat transfer coefficient. High throughput can be achieved in relatively small reactors. An experimental investigation verified a theoretical prediction, that a considerable part of the decomposition takes place in the first few centimeters of the reactor length. The rate of heat transfer in this section was high, with Nusselt numbers of 9.9 to 31.7.