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DOI: 10.1016/j.apenergy.2017.11.037

On the influence of different experimental systems on measured heterogeneous gasification kinetics

Stoesser, P.; Schneider, C.; Kreitzberg, T.; Kneer, R.; Kolb, T.

The objective of this study was to gain further insight into the characteristic behavior of reaction systems for establishment of intrinsic and effective particle gasification kinetics. A wood-derived char was subjected to the carbon dioxide-containing atmospheres of four different reaction systems: a thermogravimetric analyzer (TGA), a fluidized-bed reactor (FBR), a fixed-bed reactor (FFB) and a drop-tube reactor (DTR). All systems contained the same CO2 partial pressure of 800 mbar at atmospheric pressure. A temperature span from 700 to 1600 °C and residence times from 200 ms to over 8 h were investigated. Reactivities spanning five orders of magnitude were observed. The gasification experiments resulted in the identification of four fundamentally different reaction domains; two were classified as true particle behavior, while the observed reaction rates of the other two domains are mainly dominated by the characteristics of the reaction system applied. The domains were referred to as: chemical control, particle diffusion control, bed diffusion control, and system response control. Within the present work, the occurrence of these ... mehr

Zugehörige Institution(en) am KIT Engler-Bunte-Institut (EBI)
Institut für Technische Chemie (ITC)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 0306-2619, 1872-9118
KITopen ID: 1000076788
HGF-Programm 34.14.04; LK 01
Erschienen in Applied energy
Band 211
Seiten 582 - 589
Projektinformation HVIGasTech (HGF, HGF IVF, VH-VI-429)
Vorab online veröffentlicht am 21.11.2017
Schlagworte Boudouard reaction, Reaction regimes, Thermogravimetric analyzer, Fluidized-bed, Fixed-bed, Drop-tube
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