Biomass gasification with steam in fluidized bed: Effectiveness of CaO, MgO, and CaO-MgO for hot raw gas cleaning
Journal Article
·
· Industrial and Engineering Chemistry Research
- Univ. of Saragossa (Spain). Dept. of Chemical and Environmental Engineering
- Univ. Complutense of Madrid (Spain). Dept. of Chemical Engineering
The upgrading of the raw hot gas from a bubbling fluidized bed biomass gasifier is studied using cheap calcined minerals or rocks downstream from the gasifier. Biomass gasification is made with steam (not air) at 750--780 C and about 0.5--1.0 kg of biomass/h. Calcined solids used are dolomite (MgO-CaO), pure calcite (CaO), and pure magnesite (MgO). Variables studied have been temperature of the secondary bed (780--910 C), time of contact or space-time of the gas (0.08--0.32 kg{center_dot}h/m{sup 3}n), and particle diameter (1--4 mm) and type of mineral. Their effects on tar conversion, tar amount in the exit gas, product distribution, and gas composition are presented. Using a macrokinetic model for the tar disappearance network, the activities of the stones are expressed by their apparent kinetic constant. Apparent energies of activation for tar elimination (42--47 kJ/mol) and preexponential and effectiveness factors are given for all tested solids of which the most active is the calcined dolomite.
- Sponsoring Organization:
- DGICyT (Spain)
- OSTI ID:
- 509348
- Journal Information:
- Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 5 Vol. 36; ISSN IECRED; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
Similar Records
Performance of different dolomites on hot raw gas cleaning from biomass gasification with air
Commercial steam reforming catalysts to improve biomass gasification with steam-oxygen mixtures. 2: Catalytic tar removal
Biomass gasification with air in a fluidized bed: Effect of the in-bed use of dolomite under different operation conditions
Journal Article
·
Mon Sep 01 00:00:00 EDT 1997
· Industrial and Engineering Chemistry Research
·
OSTI ID:538237
Commercial steam reforming catalysts to improve biomass gasification with steam-oxygen mixtures. 2: Catalytic tar removal
Journal Article
·
Wed Jul 01 00:00:00 EDT 1998
· Industrial and Engineering Chemistry Research
·
OSTI ID:655525
Biomass gasification with air in a fluidized bed: Effect of the in-bed use of dolomite under different operation conditions
Journal Article
·
Sun Oct 31 23:00:00 EST 1999
· Industrial and Engineering Chemistry Research
·
OSTI ID:20003880