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A novel dual circulating fluidized bed system for chemical looping processes
Author(s) -
Pröll Tobias,
Kolbitsch Philipp,
BolhàrNordenkampf Johannes,
Hofbauer Hermann
Publication year - 2009
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.11934
Subject(s) - chemical looping combustion , fluidized bed , nuclear engineering , fluidized bed combustion , combustion , fluidization , waste management , chemical reactor , materials science , environmental science , process engineering , chemistry , chemical engineering , engineering , organic chemistry
A fluidized bed system combining two circulating fluidized bed reactors is proposed and investigated for chemical looping combustion. Direct hydraulic communication of the two circulating fluidized bed reactors via a fluidized loop seal allows for high rates of global solids circulation and results in a stable solids distribution in the system. A 120 kW fuel power bench scale unit was designed, built, and operated. Experimental results are presented for natural gas as fuel using a nickel‐based oxygen carrier. No carbon was lost to the air reactor under any conditions operated. It is shown from fuel power variations that a turbulent/fast fluidized bed regime in the fuel reactor is advantageous. Despite the relatively low riser heights (air reactor: 4.1 m, fuel reactor: 3.0 m), high CH 4 conversion and CO 2 yield of up to 98% and 94%, respectively, can be reported for the material tested. © 2009 American Institute of Chemical Engineers AIChE J, 2009