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Dependence of bituminous coal gasification on pressure in a turbulent circulating fluidized bed
Author(s) -
Duan Feng,
Zhang Lihui,
Huang Yaji
Publication year - 2011
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.640
Subject(s) - fluidization , coal , coal gasification , fluidized bed , bituminous coal , waste management , integrated gasification combined cycle , fluidized bed combustion , carbon fibers , materials science , environmental science , chemistry , nuclear engineering , syngas , hydrogen , composite material , engineering , organic chemistry , composite number
ABSTRACT The concept of high‐temperature air/steam‐blown gasification technology to convert coal into fuel gas for power generation is proposed and evaluated. The effect of the pressure on coal gasification characteristics is studied experimentally by using a pressurized turbulent circulating fluidized bed (CFB). The results show that the product quality is improved at higher pressure because of the better fluidization in the reactor. Coal gasification at a higher pressure shows advantages in higher heating value (HHV) and carbon conversion. The HHV is increased by 16.6% when the pressure is increased from 0.1 to 0.3 MPa. The increase of the pressure increases the carbon conversion from 57.52% to 76.76%. In addition, dry gas yield and cold gas efficiency increase while the carbon content of fly ash decreases with the increase of pressure. Optimum operating pressure range exists for this specific CFB coal gasification process. © 2011 Curtin University of Technology and John Wiley & Sons, Ltd.