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Table 1 Pretreatment conditions used to pretreat biomass using different methods

From: A comparative study of ethanol production using dilute acid, ionic liquid and AFEX™ pretreated corn stover

Method

Pretreatment

Post-wash

Temperature (°C)

Residence time (minutes)

Catalyst type

Catalyst loading (kg)a

Catalyst recyclable?

Water loading (kg)b

Post-wash water use (kg)b

Water temperature (°C)

DA

160

20

Sulfuric acid

4.5

No

895.5

1,000

Room temperature

IL

140

180

IL [C2mim][OAc]

900

Yes

N/R

10,000

Room temperature

AFEX

140

15

Anhydrous ammonia

100

Yes

60

N/R

-

  1. aCatalyst loading: kg/100 kg dry biomass; bwater use: L/100 kg dry biomass. AFEX, ammonia fiber expansion; [C2mim][OAc], 1-ethyl-3-methylimidazolium acetate; DA, dilute acid; IL, ionic liquid; N/R, not required.