Hydrothermal Gasification of Biomass - Biomass Gasification, Pyrolysis and Torrefaction - page 332

TABLE 9.3 Effect of Different Operating Parameters Including Solid Concentration in Feed on Gasification

C , 2 wt% 2 , C , 10 wt% C . 10 wt%

Holgate
(1995)

Kruse
(1999)

Kruse
(2003) Reference Yu (1993) Hao (2003) Xu (1996) Yu (1993) Xu (1996)

Feedstock Glucose Glucose Wood Glucose Formic acid Baby food Glucose Glucose

Conc. (wt%) 0.01 1.8 1 7.2 2.8 5.4 14.4 22

P (bar) 246 345 350 250 345 300 345 345

T ( C)

600 600 450 650 600 500 600 600

Reactor type Flow

reactor

Tubular flow
reactor

Autoclave Tubular
flow reactor
2

Tubular flow
reactor

SCTR Tubular flow

reactor

Tubular flow
reactor 1

9mm

Residence time (s) 6 34 7200 210 34 300 34 34

Carbon conversion
efficiency (%)

100 90 91.8 89.6 93 60 68 80

Gas composition

H 2 61.3 61.6 28.9 21.5 49.2 44 25 11

CO 2 36.8 29 48.4 35.5 48.1 41 16.6 5.7

CO 2 3.3 18.3 1.7 0.4 41.6 62.3

CH 4 1.8 7.2 19 15.8 1 14.6 16.7 16.5

C 2,3 5.3 4.5

X c —carbon conversion.
C—initial feed concentration.
C—concentration of solid in feed.
Source: Compiled from Mozaffarian et al. (2004).