Open AccessRemoval of SO2 with particles of dolomite limestone powder in a binary fluidized bed reactor with bubbling fluidization
Author(s) -
Reinaldo Pisani,
Deovaldo de Moraes
Publication year - 2003
Publication title -
brazilian journal of chemical engineering/brazilian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.313
H-Index - 52
eISSN - 1678-4383
pISSN - 0104-6632
DOI - 10.1590/s0104-66322003000200002
Subject(s) - fluidization , dolomite , residence time (fluid dynamics) , fluidized bed , superficial velocity , chemistry , molar ratio , mineralogy , materials science , analytical chemistry (journal) , chemical engineering , chromatography , geotechnical engineering , flow (mathematics) , mechanics , geology , catalysis , organic chemistry , physics , engineering
In this work, SO2 was treated by reaction with dolomite limestone (24 µm) in a fluidized bed reactor composed of 500-590 µm sand particles. The influence of operating temperature (500, 600, 700 and 800ºC), superficial gas velocity (0.8, 1.0 and 1.2 m/s) and Ca/S molar ratio (1, 2 and 3) on SO2 removal efficiency for an inlet concentration of 1000 ppm was examined. Removal of the pollutant was found to be dependent on temperature and Ca/S molar ratio, particularly at 700 and 800ºC. A maximum removal of 76% was achieved at a velocity of 0.8 m/s, a temperature of 800°C and a Ca/S of 3. The main residence time of the powder particles was determined by integrating normalized gas concentration curves as a function of time; the values found ranged from 4.1 to 14.4 min. It was concluded that the reactor operated in bubbling fluidization under every operational condition