Biomass Gasification Integrated with Pyrolysis in a Circulating Fluidised Bed

Abstract

The use of biomass for energy generation is getting increasing attention. At present, gasification of biomass is taken as a popular technical route to produce fuel gas for application in boilers, engine, gas turbine or fuel cell. Up to now, most of researchers have focused their attentions only on fixed-bed gasification and fluidised bed gasification under airblown conditions. In that case, the producer gas is contaminated by high tar contents and particles which could lead to the corrosion and wear of blades of turbine. Furthermore, both the technologies, particularly fixed bed gasification, are not flexible for using multiple biomass-fuel types and also not feasible economically and environmentally for large scale application up to 10-50 MWth. An innovative circulating fluidised bed concept has been considered in our laboratory for biomass gasification thereby overcoming these challenges. The concept combines and integrates partial oxidation, fast pyrolysis (with an instantaneous drying), gasification, and tar cracking, as well as a shift reaction, with the purpose of producing a high quality of gas, in terms of low tar level and particulates carried out in the producer gas, and overall emissions reduction associated with the combustion of producer gas. This paper describes our innovative concept and presents some experimental results. The results indicate that the gas yield can be above 1.83 N m3/kg and the fluctuation of the gas yield during the period of operation is 3.3% at temperature of 750 °C. Generally speaking, the results achieved support our concept as a promising alternative to gasify biomass for the generation of electricity.

Auteur(s) / Author(s)
CHEN G. (1 2) ; ANDRIES J. (2) ; SPLIETHOFF H. (2) ; FANG M. (3) ; VAN DE ENDEN P. J. (2) ;
Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)
(1) Bioenergy and Wastes Treatment Group, School of Environmental Science and Engineering, Tianjin University, Weijin Road 92, Tianjin 300072, Naikai District, CHINE
(2) Section Thermal Power Engineering, Faculty of Design, Engineering and Production, Delft University of Technology, Mekelweg 2, 2628 CD Deft, PAYS-BAS
(3) Institute for Thermal Power Engineering, Zhejiang University, Yugu Road 20, Hangzhou 310027, CHINE

Revue / Journal Title
Solar energy ISSN 0038-092X CODEN SRENA4
Source / Source

Congrès
Solar World Congress 2001, Adelaide , AUSTRALIE (2001)
2004, vol. 76, no 1-3 (362 p.) [Document : 5 p.] (11 ref.), [Notes: Selected papers], pp. 345-349 [5 page(s) (article)]

Source